863 lines
112 KiB
XML
863 lines
112 KiB
XML
<document id="FED043DAD4D0E0A5C34A70925C071F07" ID-CLB-Dataset="9476" ID-DOI="10.5852/ejt.2020.726.1169" ID-GBIF-Dataset="778b3715-635c-4d46-9d08-8d355fa91d5f" ID-Zenodo-Dep="4298412" IM.bibliography_approvedBy="felipe" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1606740566984" checkinUser="plazi" docAuthor="Paillès, Christine, Sylvestre, Florence, Tonetto, Alain, Mazur, Jean-Charles & Conrod, Sandrine" docDate="2020" docId="03E74A22FFA97C44A5416410FD13ACA9" docLanguage="en" docName="ejt-726_pailles_sylvestre_tonetto.pdf" docOrigin="European Journal of Taxonomy 726" docStyle="DocumentStyle:EF2B578F1D15862ADE45B0C07C620911.14:EJT.2018-.journal_article.type1" docStyleId="EF2B578F1D15862ADE45B0C07C620911" docStyleName="EJT.2018-.journal_article.type1" docStyleVersion="14" docTitle="Discostella gabinii Pailles & Sylvestre 2020, sp. nov." docType="treatment" docVersion="14" lastPageNumber="15" masterDocId="FFDE325AFFA07C4AA744655EFFE6A94F" masterDocTitle="New fossil genus and new extant species of diatoms (Stephanodiscaceae, Bacillariophyceae) from Pleistocene sediments in the Neotropics (Guatemala, Central America): adaptation to a changing environment?" masterLastPageNumber="23" masterPageNumber="1" pageNumber="10" updateTime="1698846962647" updateUser="ExternalLinkService" zenodo-license-document="CC-BY-4.0" zenodo-license-figures="CC-BY-4.0" zenodo-license-treatments="UNSPECIFIED">
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<mods:titleInfo id="93E0773075A1D31D061D35AD23812B1C">
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<mods:title id="3D2590CC5D9C7BEFB756F903CF75120E">New fossil genus and new extant species of diatoms (Stephanodiscaceae, Bacillariophyceae) from Pleistocene sediments in the Neotropics (Guatemala, Central America): adaptation to a changing environment?</mods:title>
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</mods:titleInfo>
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<mods:name id="8E7B0C5E98E6CFAE70C9E780FF4D7CE2" type="personal">
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<mods:roleTerm id="3A1768DB71E395F861C2A302D903ECF1">Author</mods:roleTerm>
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<mods:namePart id="833332957A7D8887D76151D6B870CEBA">Paillès, Christine</mods:namePart>
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<mods:affiliation id="410393262B50A7CFD79E40CDDE696576">Aix-Marseille Université, CNRS, IRD, Collège de France, INRAE, CEREGE, 13545 Aix-en-Provence cedex 4, France.</mods:affiliation>
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<mods:nameIdentifier id="719BB6E4DB0BD6A8590FF6E7F634A715" type="email">pailles@cerege.fr</mods:nameIdentifier>
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</mods:name>
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<mods:roleTerm id="A0E3D103410FEC8CF33B6F168A29CAC3">Author</mods:roleTerm>
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</mods:role>
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<mods:namePart id="976332B2180F5B395EE9EED384EFA0F1">Sylvestre, Florence</mods:namePart>
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<mods:affiliation id="7B26190BE5939EA9F8FB710667AB3275">Aix-Marseille Université, CNRS, IRD, Collège de France, INRAE, CEREGE, 13545 Aix-en-Provence cedex 4, France.</mods:affiliation>
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<mods:nameIdentifier id="E678BB991E6886F5B544931272E8DDB2" type="email">sylvestre@cerege.fr</mods:nameIdentifier>
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<mods:name id="5EDC47018291AA075EC92EBED78CC2E8" type="personal">
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<mods:roleTerm id="0F933885C674ABD8619CE6E6664E1E3C">Author</mods:roleTerm>
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</mods:role>
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<mods:namePart id="90297CB90EE3FDEA54DBDF0F3AA66154">Tonetto, Alain</mods:namePart>
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<mods:affiliation id="5A3F01E4D60DF95358167F9635BCBF90">Aix-Marseille Université, Fédération de Chimie, PRATIM, 3 Place Victor Hugo, 13331 Marseille Cedex 3, France.</mods:affiliation>
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<mods:nameIdentifier id="2FA5C802A80415ADE36513937C4AFFF2" type="email">alain.tonetto@univ-amu.fr</mods:nameIdentifier>
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</mods:name>
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<mods:name id="FE6F92FB27CEC1BED4F724BF60E1238C" type="personal">
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<mods:roleTerm id="963986ACDED915CA7F7C977C890E6669">Author</mods:roleTerm>
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</mods:role>
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<mods:namePart id="A1429FC37F0C60282B19B71A70EF18EA">Mazur, Jean-Charles</mods:namePart>
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<mods:affiliation id="91DE0E0942DCAD2406B52F43F8FAC08B">Aix-Marseille Université, CNRS, IRD, Collège de France, INRAE, CEREGE, 13545 Aix-en-Provence cedex 4, France.</mods:affiliation>
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<mods:nameIdentifier id="26A53288C84CA01257A1500C5F37096A" type="email">mazur@cerege.fr</mods:nameIdentifier>
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</mods:role>
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<mods:namePart id="6AE8027525EB46A7DEB179161E1BBF8F">Conrod, Sandrine</mods:namePart>
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<mods:affiliation id="CA9F451BBE85C5D7714300F9AEFDC70A">Aix-Marseille Université, CNRS, IRD, Collège de France, INRAE, CEREGE, 13545 Aix-en-Provence cedex 4, France.</mods:affiliation>
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<mods:nameIdentifier id="24982F567DF2B6EDB51068259E261B8A" type="email">conrod@cerege.fr</mods:nameIdentifier>
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<mods:title id="8B8B3CD066D20F74E53F320310D8CEE4">European Journal of Taxonomy</mods:title>
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<mods:part id="9739AC0CF79717EBD664FAB194E4C009">
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<mods:date id="3650F354AE4F5DD3A73E10C75A0E7062">2020</mods:date>
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<mods:number id="3CBE4BAD560133BD119D6800B28072B0">2020-11-30</mods:number>
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<mods:number id="C5A0767ED7DB78525BB1DFD17D1255A1">726</mods:number>
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<mods:start id="117E049D56F4DD86FA01E31A93C0AEBF">1</mods:start>
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<mods:end id="663C0E2591931E84DAA5A6F24B908F3E">23</mods:end>
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<mods:classification id="4D018ECEC0FA04EDD2854CE6DB6C8DA3">journal article</mods:classification>
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<mods:identifier id="CC62C630C77F1890CA0813BAC7F8B980" type="CLB-Dataset">9476</mods:identifier>
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<mods:identifier id="008504A471F89A382D4F8B39AB44EE56" type="DOI">10.5852/ejt.2020.726.1169</mods:identifier>
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<treatment id="03E74A22FFA97C44A5416410FD13ACA9" ID-DOI="http://doi.org/10.5281/zenodo.4328120" ID-GBIF-Taxon="170599225" ID-Zenodo-Dep="4328120" LSID="urn:lsid:plazi:treatment:03E74A22FFA97C44A5416410FD13ACA9" httpUri="http://treatment.plazi.org/id/03E74A22FFA97C44A5416410FD13ACA9" lastPageId="14" lastPageNumber="15" pageId="9" pageNumber="10">
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<subSubSection id="C354A8BFFFA97C43A5416410FBC9A826" box="[517,1071,334,361]" pageId="9" pageNumber="10" type="nomenclature">
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<paragraph id="8BF1FB34FFA97C43A5416410FBC9A826" blockId="9.[517,1071,334,400]" box="[517,1071,334,361]" pageId="9" pageNumber="10">
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<heading id="D0B94C58FFA97C43A5416410FBC9A826" box="[517,1071,334,361]" centered="true" fontSize="11" level="2" pageId="9" pageNumber="10" reason="2">
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<taxonomicName id="4C4E80B7FFA97C43A5416410FC2BA827" authority="Pailles & Sylvestre" authorityName="Pailles & Sylvestre" authorityYear="2020" box="[517,973,334,361]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="9" pageNumber="10" phylum="Ochrophyta" rank="species" species="gabinii" status="sp. nov.">
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<emphasis id="B93A2726FFA97C43A5416410FD03A826" bold="true" box="[517,741,334,361]" italics="true" pageId="9" pageNumber="10">Discostella gabinii</emphasis>
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||
Paillès & Sylvestre
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</taxonomicName>
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<taxonomicNameLabel id="A2099A5DFFA97C43A4906411FBC9A826" box="[980,1071,335,361]" pageId="9" pageNumber="10" rank="species">sp. nov.</taxonomicNameLabel>
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</heading>
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</paragraph>
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</subSubSection>
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<subSubSection id="C354A8BFFFA97C43A59C642BFCBDA8DF" box="[728,859,373,400]" pageId="9" pageNumber="10" type="description">
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<paragraph id="8BF1FB34FFA97C43A59C642BFCBDA8DF" blockId="9.[517,1071,334,400]" box="[728,859,373,400]" pageId="9" pageNumber="10">
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<figureCitation id="1375E7B1FFA97C43A59C642BFCC8A8DF" box="[728,814,373,400]" captionStart="Figs 41–50" captionStartId="9.[189,241,1856,1882]" captionTargetBox="[193,1396,1306,1814]" captionTargetId="figure-147@9.[189,1398,1304,1818]" captionTargetPageId="9" captionText="Figs 41–50. Discostella gabinii Paillès & Sylvestre sp. nov., Lake Petén-Itzá (Guatemala); LM valve views. 41–42. Modern specimens of D. gabinii sp. nov. from Cenote Juarez. 43–44. Modern specimens of D. gabinii sp. nov. from Lake Amatitlan. 45–50. Type material of fossil lacustrine diatom D. gabinii sp. nov. 45. Holotype (MNHN, slide PC060873). 48–50. A shadow line is visible in large specimens. Scale bar = 10 µm." figureDoi="http://doi.org/10.5281/zenodo.4298428" httpUri="https://zenodo.org/record/4298428/files/figure.png" pageId="9" pageNumber="10">Figs 41</figureCitation>
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–58
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</paragraph>
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</subSubSection>
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<subSubSection id="C354A8BFFFA97C43A7F964E4FEA9AB62" pageId="9" pageNumber="10" type="etymology">
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<paragraph id="8BF1FB34FFA97C43A7F964E4FEA2A89B" blockId="9.[189,324,442,468]" box="[189,324,442,468]" pageId="9" pageNumber="10">
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<heading id="D0B94C58FFA97C43A7F964E4FEA2A89B" bold="true" box="[189,324,442,468]" fontSize="11" level="3" pageId="9" pageNumber="10" reason="3">
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<emphasis id="B93A2726FFA97C43A7F964E4FEA2A89B" bold="true" box="[189,324,442,468]" pageId="9" pageNumber="10">Etymology</emphasis>
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</heading>
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</paragraph>
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<paragraph id="8BF1FB34FFA97C43A7F964B2FEA9AB62" blockId="9.[189,1398,492,558]" pageId="9" pageNumber="10">This taxon is named in honor of deceased Gabin Sylvestre, the courageous 7 years old nephew of F. Sylvestre.</paragraph>
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</subSubSection>
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<subSubSection id="C354A8BFFFA97C43A7F96706FC63ADA7" pageId="9" pageNumber="10" type="materials_examined">
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<paragraph id="8BF1FB34FFA97C43A7F96706FE8AAB3D" blockId="9.[189,364,600,626]" box="[189,364,600,626]" pageId="9" pageNumber="10">
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<heading id="D0B94C58FFA97C43A7F96706FE8AAB3D" bold="true" box="[189,364,600,626]" fontSize="11" level="3" pageId="9" pageNumber="10" reason="3">
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||
<emphasis id="B93A2726FFA97C43A7F96706FE8AAB3D" bold="true" box="[189,364,600,626]" pageId="9" pageNumber="10">Type material</emphasis>
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</heading>
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||
</paragraph>
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||
<materialsCitation id="3B26F169FFA97C43A7AE67D5FDF3AA56" ID-GBIF-Occurrence="2987080301" collectionCode="MNHN" collectorName="Slide PC & Museum" country="France" location="Laboratoire de Cryptogamie" pageId="9" pageNumber="10" specimenCount="2" typeStatus="holotype">
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<paragraph id="8BF1FB34FFA97C43A7AE67D5FEBAABEA" blockId="9.[189,1399,651,793]" box="[234,348,651,677]" pageId="9" pageNumber="10">
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||
<emphasis id="B93A2726FFA97C43A7AE67D5FEBAABEA" bold="true" box="[234,348,651,677]" pageId="9" pageNumber="10">
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||
<typeStatus id="54F54596FFA97C43A7AE67D5FEBAABEA" box="[234,348,651,677]" pageId="9" pageNumber="10" type="holotype">Holotype</typeStatus>
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</emphasis>
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</paragraph>
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||
<paragraph id="8BF1FB34FFA97C43A7F967EFFDF3AA56" blockId="9.[189,1399,651,793]" pageId="9" pageNumber="10">
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||
Slide PC0608732 and sediment PC0608730 deposited at the Laboratoire de Cryptogamie, Muséum national d’histoire naturelle (
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<collectionCode id="ED5F63F1FFA97C43A5546786FD8BABBD" box="[528,621,728,754]" collectionName="France, Paris, Museum National d'Histoire Naturelle" country="France" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34988" lsid="urn:lsid:biocol.org:col:34988" name="Museum National d'Histoire Naturelle" pageId="9" pageNumber="10">MNHN</collectionCode>
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||
) Paris, France. Specimen on slide PC0608732 (
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||
<figureCitation id="1375E7B1FFA97C43A3DF6786FB16ABBC" box="[1179,1264,728,755]" captionStart="Figs 41–50" captionStartId="9.[189,241,1856,1882]" captionTargetBox="[193,1396,1306,1814]" captionTargetId="figure-147@9.[189,1398,1304,1818]" captionTargetPageId="9" captionText="Figs 41–50. Discostella gabinii Paillès & Sylvestre sp. nov., Lake Petén-Itzá (Guatemala); LM valve views. 41–42. Modern specimens of D. gabinii sp. nov. from Cenote Juarez. 43–44. Modern specimens of D. gabinii sp. nov. from Lake Amatitlan. 45–50. Type material of fossil lacustrine diatom D. gabinii sp. nov. 45. Holotype (MNHN, slide PC060873). 48–50. A shadow line is visible in large specimens. Scale bar = 10 µm." figureDoi="http://doi.org/10.5281/zenodo.4298428" httpUri="https://zenodo.org/record/4298428/files/figure.png" pageId="9" pageNumber="10">Fig. 45</figureCitation>
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) represents the
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<typeStatus id="54F54596FFA97C43A7AC67A1FEA9AA56" box="[232,335,767,793]" pageId="9" pageNumber="10" type="holotype">holotype</typeStatus>
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designated here.
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||
</paragraph>
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</materialsCitation>
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<materialsCitation id="3B26F169FFA97C43A7AE661AFED6AAE3" ID-GBIF-Occurrence="2987080305" pageId="9" pageNumber="10" specimenCount="1">
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<paragraph id="8BF1FB34FFA97C43A7AE661AFEA3AA11" blockId="9.[188,1398,836,940]" box="[234,325,836,862]" pageId="9" pageNumber="10">
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||
<emphasis id="B93A2726FFA97C43A7AE661AFEA3AA11" bold="true" box="[234,325,836,862]" pageId="9" pageNumber="10">Isotype</emphasis>
|
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</paragraph>
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||
<paragraph id="8BF1FB34FFA97C43A7F96635FED6AAE3" blockId="9.[188,1398,836,940]" pageId="9" pageNumber="10">Slide ZU 11/31 and sediment R1285 deposited at the Friedrich Hustedt Diatom Center in Bremerhaven, Germany.</paragraph>
|
||
</materialsCitation>
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||
<paragraph id="8BF1FB34FFA97C43A7F96689FE1FAABE" blockId="9.[189,505,983,1009]" box="[189,505,983,1009]" pageId="9" pageNumber="10">
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<heading id="D0B94C58FFA97C43A7F96689FE1FAABE" bold="true" box="[189,505,983,1009]" fontSize="11" level="3" pageId="9" pageNumber="10" reason="3">
|
||
<emphasis id="B93A2726FFA97C43A7F96689FE1FAABE" bold="true" box="[189,505,983,1009]" pageId="9" pageNumber="10">Other material examined</emphasis>
|
||
</heading>
|
||
</paragraph>
|
||
<paragraph id="8BF1FB34FFA97C43A7F96157FB6BAD6C" blockId="9.[189,1165,1033,1060]" box="[189,1165,1033,1060]" pageId="9" pageNumber="10">
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||
Modern specimens collected from Cenote Juarez and Lake Amatitlan (see
|
||
<tableCitation id="C6CCCE8FFFA97C43A3626157FB9AAD6C" box="[1062,1148,1033,1059]" captionStart="Table 1" captionStartId="15.[189,258,265,291]" captionTargetBox="[193,1395,437,1877]" captionTargetId="graphics-11@15.[189,1398,428,1887]" captionTargetPageId="15" captionText="Table 1 (continued on the next page). Selected limnological and chemical data from lakes (single measurements in 2005 or 2008) containingDiscostella gabinii Paillès & Sylvestre sp. nov. and Cyclotella petenensis Sylvestre, Paillès & Escobar in the Yucatan Peninsula after Pérez et al. (2013). n.d. = not determined." httpUri="http://table.plazi.org/id/DF31ABBCFFAF7C45A7F96457FEADA8C3" pageId="9" pageNumber="10" tableUuid="DF31ABBCFFAF7C45A7F96457FEADA8C3">Table 1</tableCitation>
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||
).
|
||
</paragraph>
|
||
<paragraph id="8BF1FB34FFA97C43A7F96110FEBBAD27" blockId="9.[189,349,1102,1128]" box="[189,349,1102,1128]" pageId="9" pageNumber="10">
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<heading id="D0B94C58FFA97C43A7F96110FEBBAD27" bold="true" box="[189,349,1102,1128]" fontSize="11" level="3" pageId="9" pageNumber="10" reason="3">
|
||
<emphasis id="B93A2726FFA97C43A7F96110FEBBAD27" bold="true" box="[189,349,1102,1128]" pageId="9" pageNumber="10">Type locality</emphasis>
|
||
</heading>
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||
</paragraph>
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||
<paragraph id="8BF1FB34FFA97C43A7F961DFFC63ADA7" blockId="9.[189,1399,1151,1257]" pageId="9" pageNumber="10">
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||
<materialsCitation id="3B26F169FFA97C43A7F961DFFC66ADA7" ID-GBIF-Occurrence="2985864302" collectingDate="2006-02" collectionCode="GLAD, PET" country="Guatemala" elevation="52" latitude="16.26389" location="Lake Peten-Itza" longLatPrecision="21" longitude="-89.25" municipality="Department" pageId="9" pageNumber="10" specimenCode="GLAD9, PET06-6" specimenCount="1" stateProvince="Department of Peten">
|
||
<collectingCountry id="F359BBA4FFA97C43A7F961DFFE94ADD4" box="[189,370,1153,1179]" name="Guatemala" pageId="9" pageNumber="10">GUATEMALA</collectingCountry>
|
||
•
|
||
<collectingRegion id="498A35D6FFA97C43A6CE61DFFD99ADD4" box="[394,639,1152,1179]" pageId="9" pageNumber="10">Department of Petén</collectingRegion>
|
||
,
|
||
<location id="8E91ADEFFFA97C43A5CE61DEFCA1ADD4" LSID="urn:lsid:plazi:treatment:03E74A22FFA97C44A5416410FD13ACA9:8E91ADEFFFA97C43A5CE61DEFCA1ADD4" box="[650,839,1152,1179]" country="Guatemala" latitude="16.26389" longLatPrecision="21" longitude="-89.25" municipality="Department" name="Lake Peten-Itza" pageId="9" pageNumber="10" stateProvince="Department of Peten">Lake Petén-Itzá</location>
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||
;
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<geoCoordinate id="EE7A9DF3FFA97C43A4166121FC02ADD4" box="[850,996,1151,1179]" degrees="16" direction="north" minutes="15" orientation="latitude" pageId="9" pageNumber="10" precision="15" seconds="50" value="16.26389">16º15′50″ N</geoCoordinate>
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,
|
||
<geoCoordinate id="EE7A9DF3FFA97C43A4B46121FB6EADD4" box="[1008,1160,1151,1179]" degrees="89" direction="west" minutes="15" orientation="longitude" pageId="9" pageNumber="10" precision="15" seconds="00" value="-89.25">89º15′00″ W</geoCoordinate>
|
||
; lacustrine sediment in core PI-06; sample
|
||
<specimenCode id="DBE8534FFFA97C43A6F961F9FDC5AD8E" box="[445,547,1191,1217]" collectionCode="GLAD" pageId="9" pageNumber="10">GLAD9</specimenCode>
|
||
-
|
||
<specimenCode id="DBE8534FFFA97C43A56F61F9FD7FAD8E" box="[555,665,1191,1217]" collectionCode="PET" country="China" httpUri="http://biocol.org/urn:lsid:biocol.org:col:13734" lsid="urn:lsid:biocol.org:col:13734" name="National University of Peking Teachers' College" pageId="9" pageNumber="10" type="Herbarium">PET06-6</specimenCode>
|
||
B-18E1- 35.4–
|
||
<quantity id="4CB656D1FFA97C43A47B61F9FC7BAD8D" box="[831,925,1191,1218]" metricMagnitude="-1" metricUnit="m" metricValue="3.6399999999999997" pageId="9" pageNumber="10" unit="cm" value="36.4">36.4 cm</quantity>
|
||
(
|
||
<quantity id="4CB656D1FFA97C43A4EF61F9FBEAAD8D" box="[939,1036,1191,1218]" metricMagnitude="1" metricUnit="m" metricValue="5.153" pageId="9" pageNumber="10" unit="m" value="51.53">
|
||
<elevation id="00631C07FFA97C43A4EF61F9FBEAAD8D" box="[939,1036,1191,1218]" metricMagnitude="1" metricUnit="m" metricValue="5.153" pageId="9" pageNumber="10" unit="m" value="51.53">51.53 m</elevation>
|
||
</quantity>
|
||
below lake floor) consisting of dark gray clayish sediment; core collected in
|
||
<date id="FFF0DDF4FFA97C43A5956190FC66ADA7" box="[721,896,1230,1256]" pageId="9" pageNumber="10" value="2006-02">
|
||
<collectingDate id="EFB4241CFFA97C43A5956190FC66ADA7" box="[721,896,1230,1256]" pageId="9" pageNumber="10" value="2006-02">February 2006</collectingDate>
|
||
</date>
|
||
</materialsCitation>
|
||
.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<caption id="DF31ABBCFFA97C43A7F9621EFE78AEA7" ID-DOI="http://doi.org/10.5281/zenodo.4298428" ID-Zenodo-Dep="4298428" httpUri="https://zenodo.org/record/4298428/files/figure.png" pageId="9" pageNumber="10" startId="9.[189,241,1856,1882]" targetBox="[193,1396,1306,1814]" targetPageId="9">
|
||
<paragraph id="8BF1FB34FFA97C43A7F9621EFE78AEA7" blockId="9.[189,1399,1856,2024]" pageId="9" pageNumber="10">
|
||
<emphasis id="B93A2726FFA97C43A7F9621EFEADAE14" bold="true" box="[189,331,1856,1883]" pageId="9" pageNumber="10">Figs 41–50.</emphasis>
|
||
<taxonomicName id="4C4E80B7FFA97C43A610621FFCC5AE14" authority="Pailles & Sylvestre" authorityName="Pailles & Sylvestre" authorityYear="2020" box="[340,803,1857,1883]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="9" pageNumber="10" phylum="Ochrophyta" rank="species" species="gabinii" status="sp. nov.">
|
||
<emphasis id="B93A2726FFA97C43A610621FFDD3AE14" box="[340,565,1857,1883]" italics="true" pageId="9" pageNumber="10">Discostella gabinii</emphasis>
|
||
Paillès & Sylvestre
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="A2099A5DFFA97C43A468621FFC6AAE14" box="[812,908,1857,1883]" pageId="9" pageNumber="10" rank="species">sp. nov.</taxonomicNameLabel>
|
||
, Lake Petén-Itzá (Guatemala); LM valve views.
|
||
<emphasis id="B93A2726FFA97C43A654623AFEBCAE31" bold="true" box="[272,346,1892,1918]" pageId="9" pageNumber="10">41–42</emphasis>
|
||
. Modern specimens of
|
||
<taxonomicName id="4C4E80B7FFA97C43A529623BFD02AE31" authority="Paillès & Sylvestre & Tonetto & Mazur & Conrod, 2020" authorityName="Paillès & Sylvestre & Tonetto & Mazur & Conrod" authorityYear="2020" box="[621,740,1892,1918]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="9" pageNumber="10" phylum="Ochrophyta" rank="species" species="gabinii" status="sp. nov.">
|
||
<emphasis id="B93A2726FFA97C43A529623BFD02AE31" box="[621,740,1892,1918]" italics="true" pageId="9" pageNumber="10">D. gabinii</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="A2099A5DFFA97C43A5AF623AFCA0AE31" box="[747,838,1892,1918]" pageId="9" pageNumber="10" rank="species">sp. nov.</taxonomicNameLabel>
|
||
from Cenote Juarez.
|
||
<emphasis id="B93A2726FFA97C43A304623AFB6FAE31" bold="true" box="[1088,1161,1892,1918]" pageId="9" pageNumber="10">43–44</emphasis>
|
||
. Modern specimens of
|
||
<taxonomicName id="4C4E80B7FFA97C43A79962D6FEB2AEEE" authority="Paillès & Sylvestre & Tonetto & Mazur & Conrod, 2020" authorityName="Paillès & Sylvestre & Tonetto & Mazur & Conrod" authorityYear="2020" box="[221,340,1927,1953]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="9" pageNumber="10" phylum="Ochrophyta" rank="species" species="gabinii" status="sp. nov.">
|
||
<emphasis id="B93A2726FFA97C43A79962D6FEB2AEEE" box="[221,340,1927,1953]" italics="true" pageId="9" pageNumber="10">D. gabinii</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="A2099A5DFFA97C43A61862D6FE51AEED" box="[348,439,1928,1954]" pageId="9" pageNumber="10" rank="species">sp. nov.</taxonomicNameLabel>
|
||
from Lake Amatitlan.
|
||
<emphasis id="B93A2726FFA97C43A58662D9FCEAAEEE" bold="true" box="[706,780,1927,1953]" pageId="9" pageNumber="10">45–50</emphasis>
|
||
. Type material of fossil lacustrine diatom
|
||
<taxonomicName id="4C4E80B7FFA97C43A3BB62D6FA90AEEE" authority="Paillès & Sylvestre & Tonetto & Mazur & Conrod, 2020" authorityName="Paillès & Sylvestre & Tonetto & Mazur & Conrod" authorityYear="2020" box="[1279,1398,1927,1953]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="9" pageNumber="10" phylum="Ochrophyta" rank="species" species="gabinii" status="sp. nov.">
|
||
<emphasis id="B93A2726FFA97C43A3BB62D6FA90AEEE" box="[1279,1398,1927,1953]" italics="true" pageId="9" pageNumber="10">D. gabinii</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="A2099A5DFFA97C43A7F962F5FEFFAE8A" box="[189,281,1963,1989]" pageId="9" pageNumber="10" rank="species">sp. nov.</taxonomicNameLabel>
|
||
<emphasis id="B93A2726FFA97C43A66062F4FEA6AE8B" bold="true" box="[292,320,1962,1988]" pageId="9" pageNumber="10">45</emphasis>
|
||
. Holotype (MNHN, slide PC060873).
|
||
<emphasis id="B93A2726FFA97C43A45762F4FCBCAE8B" bold="true" box="[787,858,1962,1988]" pageId="9" pageNumber="10">48–50</emphasis>
|
||
. A shadow line is visible in large specimens. Scale bar = 10 µm.
|
||
</paragraph>
|
||
</caption>
|
||
<subSubSection id="C354A8BFFFAA7C40A7F96456FD15ACA3" pageId="10" pageNumber="11" type="description">
|
||
<paragraph id="8BF1FB34FFAA7C40A7F96456FEA8A86D" blockId="10.[189,334,264,290]" box="[189,334,264,290]" pageId="10" pageNumber="11">
|
||
<heading id="D0B94C58FFAA7C40A7F96456FEA8A86D" bold="true" box="[189,334,264,290]" fontSize="11" level="3" pageId="10" pageNumber="11" reason="3">
|
||
<emphasis id="B93A2726FFAA7C40A7F96456FEA8A86D" bold="true" box="[189,334,264,290]" pageId="10" pageNumber="11">Description</emphasis>
|
||
</heading>
|
||
</paragraph>
|
||
<paragraph id="8BF1FB34FFAA7C40A7AE6469FD85A81D" blockId="10.[189,1400,311,590]" box="[234,611,311,338]" pageId="10" pageNumber="11">
|
||
<emphasis id="B93A2726FFAA7C40A7AE6469FE23A81E" bold="true" box="[234,453,311,337]" pageId="10" pageNumber="11">Light microscopy</emphasis>
|
||
(
|
||
<figureCitation id="1375E7B1FFAA7C40A6916466FDBCA81D" box="[469,602,311,338]" captionStart="Figs 41–50" captionStartId="9.[189,241,1856,1882]" captionTargetBox="[193,1396,1306,1814]" captionTargetId="figure-147@9.[189,1398,1304,1818]" captionTargetPageId="9" captionText="Figs 41–50. Discostella gabinii Paillès & Sylvestre sp. nov., Lake Petén-Itzá (Guatemala); LM valve views. 41–42. Modern specimens of D. gabinii sp. nov. from Cenote Juarez. 43–44. Modern specimens of D. gabinii sp. nov. from Lake Amatitlan. 45–50. Type material of fossil lacustrine diatom D. gabinii sp. nov. 45. Holotype (MNHN, slide PC060873). 48–50. A shadow line is visible in large specimens. Scale bar = 10 µm." figureDoi="http://doi.org/10.5281/zenodo.4298428" httpUri="https://zenodo.org/record/4298428/files/figure.png" pageId="10" pageNumber="11">Figs 41–50</figureCitation>
|
||
)
|
||
</paragraph>
|
||
<paragraph id="8BF1FB34FFAA7C40A7F96405FE17AB01" blockId="10.[189,1400,311,590]" pageId="10" pageNumber="11">
|
||
Cells quadrangular in connective view. Valvar views circular and flat,
|
||
<quantity id="4CB656D1FFAA7C40A4A96402FBB1A839" box="[1005,1111,348,374]" metricMagnitude="-2" metricUnit="m" metricValue="1.3" metricValueMax="1.8" metricValueMin="0.8" pageId="10" pageNumber="11" unit="mm" value="13.0" valueMax="18.0" valueMin="8.0">8–18 µm</quantity>
|
||
in diameter with a small central area (¼ of the valve radius). Central area with 5 to>30 scattered large areolae, the number being independent of valve size (
|
||
<figureCitation id="1375E7B1FFAA7C40A6BA64FDFD6FA8F1" box="[510,649,419,446]" captionStart="Figs 41–50" captionStartId="9.[189,241,1856,1882]" captionTargetBox="[193,1396,1306,1814]" captionTargetId="figure-147@9.[189,1398,1304,1818]" captionTargetPageId="9" captionText="Figs 41–50. Discostella gabinii Paillès & Sylvestre sp. nov., Lake Petén-Itzá (Guatemala); LM valve views. 41–42. Modern specimens of D. gabinii sp. nov. from Cenote Juarez. 43–44. Modern specimens of D. gabinii sp. nov. from Lake Amatitlan. 45–50. Type material of fossil lacustrine diatom D. gabinii sp. nov. 45. Holotype (MNHN, slide PC060873). 48–50. A shadow line is visible in large specimens. Scale bar = 10 µm." figureDoi="http://doi.org/10.5281/zenodo.4298428" httpUri="https://zenodo.org/record/4298428/files/figure.png" pageId="10" pageNumber="11">Figs 41–50</figureCitation>
|
||
). When numerous, the scattered areolae give the impression of a colliculate/granular flat center. The marginal area of the valve face has radial striae numbering from
|
||
<quantity id="4CB656D1FFAA7C40A7F964B5FEDAAB4A" box="[189,316,491,518]" metricMagnitude="-1" metricUnit="m" metricValue="3.048" metricValueMax="3.556" metricValueMin="2.54" pageId="10" pageNumber="11" unit="in" value="12.0" valueMax="14.0" valueMin="10.0">10 to 14 in</quantity>
|
||
<quantity id="4CB656D1FFAA7C40A60064B5FE72AB49" box="[324,404,491,518]" metricMagnitude="-2" metricUnit="m" metricValue="1.0" pageId="10" pageNumber="11" unit="mm" value="10.0">10 µm</quantity>
|
||
. The striae are long (¾ of the valve radius) and of equal length. On large specimens, marginal striation is crossed circumferentially by a ring (ʻSchattenlinieʼ = ʻshadow lineʼ) close to the valve center (
|
||
<figureCitation id="1375E7B1FFAA7C40A61F676DFE03AB01" box="[347,485,563,590]" captionStart="Figs 41–50" captionStartId="9.[189,241,1856,1882]" captionTargetBox="[193,1396,1306,1814]" captionTargetId="figure-147@9.[189,1398,1304,1818]" captionTargetPageId="9" captionText="Figs 41–50. Discostella gabinii Paillès & Sylvestre sp. nov., Lake Petén-Itzá (Guatemala); LM valve views. 41–42. Modern specimens of D. gabinii sp. nov. from Cenote Juarez. 43–44. Modern specimens of D. gabinii sp. nov. from Lake Amatitlan. 45–50. Type material of fossil lacustrine diatom D. gabinii sp. nov. 45. Holotype (MNHN, slide PC060873). 48–50. A shadow line is visible in large specimens. Scale bar = 10 µm." figureDoi="http://doi.org/10.5281/zenodo.4298428" httpUri="https://zenodo.org/record/4298428/files/figure.png" pageId="10" pageNumber="11">Figs 48–50</figureCitation>
|
||
).
|
||
</paragraph>
|
||
<paragraph id="8BF1FB34FFAA7C40A7AE672BFD18ABDF" blockId="10.[188,1401,629,1050]" box="[234,766,629,656]" pageId="10" pageNumber="11">
|
||
<emphasis id="B93A2726FFAA7C40A7AE672BFD86ABC0" bold="true" box="[234,608,629,655]" pageId="10" pageNumber="11">Scanning electron microscopy</emphasis>
|
||
(Figs 51–58)
|
||
</paragraph>
|
||
<paragraph id="8BF1FB34FFAA7C40A7F967C7FDC5AD55" blockId="10.[188,1401,629,1050]" pageId="10" pageNumber="11">
|
||
Valves flat to barely concave externally with gently sloping mantle. Central area covered with several scattered punctae separated by knots (colliculate) bearing papillae (Figs 51–52). Radiating striae starting on the mantle as crescents of three to five rows of fine areolae (60–70 areolae/
|
||
<quantity id="4CB656D1FFAA7C40A33767BFFB21ABB4" box="[1139,1223,737,763]" metricMagnitude="-2" metricUnit="m" metricValue="1.0" pageId="10" pageNumber="11" unit="mm" value="10.0">10 µm</quantity>
|
||
), merging into two rows near the central area and ending with a single large pore (Figs 53–54). The central area is thus bordered by a ring of large areolae. On the valve face, striae are depressed, whereas they are smooth on the mantle. Near the valve margin, every third to fifth striae, pores just below the crescent of fine areolae mark the external openings of marginal fultoportulae (Fig. 54). Interstriae are narrow, domed and granular on the valve face, whereas smooth on the mantle. The mantle is unornamented except for the large round openings of marginal fultoportulae and few papillae. The external opening of the rimoportula was not observed, although it should be positioned at the same level since it is within the ring of marginal fultoportulae.
|
||
</paragraph>
|
||
<paragraph id="8BF1FB34FFAA7C40A7F9611CFB29AC17" blockId="10.[188,1401,1090,1368]" pageId="10" pageNumber="11">Interior views of the valve show a flat to slightly concave but smooth central area with none or single areola (Figs 55–56). The internal lamina spread from the valve center to ¾ of the valve radius. The alveoli are thus medium sized, oblong and of unequal length, those bearing marginal fultoportulae being longer (Fig. 56). Marginal fultoportulae with two laterally positioned satellite pores surrounding a short tubulus are located at the distal extremity of every third to fourth alveoli (Fig. 57). One nearly sessile rimoportula with vertically orientated lips located between two costae at the edge of an alveolus and within the ring of marginal fultoportulae (Fig. 58). Girdle bands present, an open valvocopula with two copulae (Fig. 56); a row of fine pores is noted on the interior of the girdle band (Fig. 58).</paragraph>
|
||
<paragraph id="8BF1FB34FFAA7C40A7F96021FEABACD6" blockId="10.[189,333,1407,1433]" box="[189,333,1407,1433]" pageId="10" pageNumber="11">
|
||
<heading id="D0B94C58FFAA7C40A7F96021FEABACD6" bold="true" box="[189,333,1407,1433]" fontSize="11" level="3" pageId="10" pageNumber="11" reason="3">
|
||
<emphasis id="B93A2726FFAA7C40A7F96021FEABACD6" bold="true" box="[189,333,1407,1433]" pageId="10" pageNumber="11">Time range</emphasis>
|
||
</heading>
|
||
</paragraph>
|
||
<paragraph id="8BF1FB34FFAA7C40A7F960F1FD15ACA3" blockId="10.[189,1399,1454,1517]" pageId="10" pageNumber="11">
|
||
Present since at least 84 ka in the geological record, present in Lake Amatitlan and Cenote Juarez (
|
||
<geoCoordinate id="EE7A9DF3FFAA7C40A781608FFE94ACA2" box="[197,370,1489,1517]" degrees="20" direction="north" minutes="48" orientation="latitude" pageId="10" pageNumber="11" precision="1" seconds="09.6" value="20.802666">20°48′09.6″ N</geoCoordinate>
|
||
,
|
||
<geoCoordinate id="EE7A9DF3FFAA7C40A63A608FFDC8ACA2" box="[382,558,1489,1517]" degrees="87" direction="west" minutes="27" orientation="longitude" pageId="10" pageNumber="11" precision="1" seconds="23.8" value="-87.45661">87°27′23.8″ W</geoCoordinate>
|
||
) in
|
||
<date id="FFF0DDF4FFAA7C40A518608CFD08ACA3" box="[604,750,1490,1516]" pageId="10" pageNumber="11" value="2008-03">March 2008</date>
|
||
.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="C354A8BFFFAA7C47A7F9634AFB6CAA5E" lastPageId="13" lastPageNumber="14" pageId="10" pageNumber="11" type="discussion">
|
||
<paragraph id="8BF1FB34FFAA7C40A7F9634AFEC9AF61" blockId="10.[189,303,1556,1582]" box="[189,303,1556,1582]" pageId="10" pageNumber="11">
|
||
<heading id="D0B94C58FFAA7C40A7F9634AFEC9AF61" bold="true" box="[189,303,1556,1582]" fontSize="11" level="3" pageId="10" pageNumber="11" reason="3">
|
||
<emphasis id="B93A2726FFAA7C40A7F9634AFEC9AF61" bold="true" box="[189,303,1556,1582]" pageId="10" pageNumber="11">Remarks</emphasis>
|
||
</heading>
|
||
</paragraph>
|
||
<paragraph id="8BF1FB34FFAA7C41A7F9631AFD28AB19" blockId="10.[189,1400,1604,2025]" lastBlockId="11.[187,1399,265,599]" lastPageId="11" lastPageNumber="12" pageId="10" pageNumber="11">
|
||
With marginal fultoportulae and rimoportula being located between costae on the marginal side of the alveolus,
|
||
<taxonomicName id="4C4E80B7FFAA7C40A6196339FDD8AFCE" authority="Paillès & Sylvestre & Tonetto & Mazur & Conrod, 2020" authorityName="Paillès & Sylvestre & Tonetto & Mazur & Conrod" authorityYear="2020" box="[349,574,1639,1665]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="10" pageNumber="11" phylum="Ochrophyta" rank="species" species="gabinii" status="sp. nov.">
|
||
<emphasis id="B93A2726FFAA7C40A6196339FDD8AFCE" box="[349,574,1639,1665]" italics="true" pageId="10" pageNumber="11">Discostella gabinii</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="A2099A5DFFAA7C40A50E6336FD42AFCD" box="[586,676,1640,1666]" pageId="10" pageNumber="11" rank="species">sp. nov.</taxonomicNameLabel>
|
||
belongs undoubtedly to the genus
|
||
<taxonomicName id="4C4E80B7FFAA7C40A3086339FB28AFCE" box="[1100,1230,1639,1665]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="10" pageNumber="11" phylum="Ochrophyta" rank="genus">
|
||
<emphasis id="B93A2726FFAA7C40A3086339FB28AFCE" box="[1100,1230,1639,1665]" italics="true" pageId="10" pageNumber="11">Discostella</emphasis>
|
||
</taxonomicName>
|
||
. Amongst the 15 species of
|
||
<taxonomicName id="4C4E80B7FFAA7C40A62D63D5FE0BAFEA" box="[361,493,1675,1701]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="10" pageNumber="11" phylum="Ochrophyta" rank="genus">
|
||
<emphasis id="B93A2726FFAA7C40A62D63D5FE0BAFEA" box="[361,493,1675,1701]" italics="true" pageId="10" pageNumber="11">Discostella</emphasis>
|
||
</taxonomicName>
|
||
described so far (
|
||
<bibRefCitation id="EFDF86C5FFAA7C40A58863D5FC2BAFEA" author="Kociolek J. P. & Balasubramanian K. & Blanco S. & Coste M. & Ector L. & Liu Y. & Kulikovskiy M. & Lundholm N. & Ludwig T. & Potapova M. & Rimet F. & Sabbe K. & Sala S. & Sar E. & Taylor J. & Van de Vijver B. & Wetzel C. E. & Williams D. M. & Witkowski A. & Witkowski J." box="[716,973,1675,1701]" pageId="10" pageNumber="11" refId="ref10921" refString="Kociolek J. P., Balasubramanian K., Blanco S., Coste M., Ector L., Liu Y., Kulikovskiy M., Lundholm N., Ludwig T., Potapova M., Rimet F., Sabbe K., Sala S., Sar E., Taylor J., Van de Vijver B., Wetzel C. E., Williams D. M., Witkowski A. & Witkowski J. 2018. DiatomBase. Discostella Houk & Klee, 2004. Available from http: // www. diatombase. org / aphia. php? p = taxdetails & id = 465545 [Accessed 19 Mar. 2020]." type="url" year="2018">
|
||
Kociolek
|
||
<emphasis id="B93A2726FFAA7C40A40163D2FC65AFEA" box="[837,899,1675,1701]" italics="true" pageId="10" pageNumber="11">et al.</emphasis>
|
||
2018
|
||
</bibRefCitation>
|
||
),
|
||
<taxonomicName id="4C4E80B7FFAA7C40A4A163D2FB86AFEA" authority="Paillès & Sylvestre & Tonetto & Mazur & Conrod, 2020" authorityName="Paillès & Sylvestre & Tonetto & Mazur & Conrod" authorityYear="2020" box="[997,1120,1675,1701]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="10" pageNumber="11" phylum="Ochrophyta" rank="species" species="gabinii" status="sp. nov.">
|
||
<emphasis id="B93A2726FFAA7C40A4A163D2FB86AFEA" box="[997,1120,1675,1701]" italics="true" pageId="10" pageNumber="11">D. gabinii</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="A2099A5DFFAA7C40A32F63D2FB2FAFE9" box="[1131,1225,1676,1702]" pageId="10" pageNumber="11" rank="species">sp. nov.</taxonomicNameLabel>
|
||
showed some resemblance to
|
||
<taxonomicName id="4C4E80B7FFAA7C40A63E63EEFC3BAF85" authority="(Hust.) Houk & Klee. However, in LM" authorityName="Houk & Klee. However, in LM" baseAuthorityName="Hust." box="[378,989,1711,1738]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="10" pageNumber="11" phylum="Ochrophyta" rank="species" species="areolata">
|
||
<emphasis id="B93A2726FFAA7C40A63E63EEFDE4AF86" box="[378,514,1711,1737]" italics="true" pageId="10" pageNumber="11">D. areolata</emphasis>
|
||
(Hust.) Houk & Klee. However, in LM
|
||
</taxonomicName>
|
||
they look somewhat different, the unique
|
||
<typeStatus id="54F54596FFAA7C40A653638DFE98AFA2" box="[279,382,1747,1773]" pageId="10" pageNumber="11" type="holotype">holotype</typeStatus>
|
||
of
|
||
<taxonomicName id="4C4E80B7FFAA7C40A6EE638AFDD5AFA2" box="[426,563,1747,1773]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="10" pageNumber="11" phylum="Ochrophyta" rank="species" species="areolata">
|
||
<emphasis id="B93A2726FFAA7C40A6EE638AFDD5AFA2" box="[426,563,1747,1773]" italics="true" pageId="10" pageNumber="11">D. areolata</emphasis>
|
||
</taxonomicName>
|
||
having coarser striation (6–9 striae in
|
||
<quantity id="4CB656D1FFAA7C40A34E638DFBBCAFA1" box="[1034,1114,1747,1774]" metricMagnitude="-2" metricUnit="m" metricValue="1.0" pageId="10" pageNumber="11" unit="mm" value="10.0">10 µm</quantity>
|
||
) and a large colliculate central area (
|
||
<bibRefCitation id="EFDF86C5FFAA7C40A61463A9FDF2AE5E" author="Houk V. & Klee R. & Tanaka H." box="[336,532,1783,1809]" pageId="10" pageNumber="11" pagination="1 - 498" refId="ref10487" refString="Houk V., Klee R. & Tanaka H. 2010. Atlas of freshwater centric diatoms with a brief key and descriptions. Part III. Stephanodiscaceae A, Cyclotella, Tertiarius, Discostella. Fottea 10 (supplement): 1 - 498." type="journal article" year="2010">
|
||
Houk
|
||
<emphasis id="B93A2726FFAA7C40A6D263A6FE28AE5E" box="[406,462,1783,1809]" italics="true" pageId="10" pageNumber="11">et al.</emphasis>
|
||
2010
|
||
</bibRefCitation>
|
||
: table 330, figs 1–7). A reexamination of the original material of
|
||
<taxonomicName id="4C4E80B7FFAA7C40A3B763A6FA90AE5E" box="[1267,1398,1783,1809]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="10" pageNumber="11" phylum="Ochrophyta" rank="species" species="areolata">
|
||
<emphasis id="B93A2726FFAA7C40A3B763A6FA90AE5E" box="[1267,1398,1783,1809]" italics="true" pageId="10" pageNumber="11">D. areolata</emphasis>
|
||
</taxonomicName>
|
||
from Hustedt by Tagliaventi & Cavinaci (2002) provided unambiguous SEM images of external views but only ambiguous internal views since
|
||
<taxonomicName id="4C4E80B7FFAA7C40A5EE621EFCD6AE16" box="[682,816,1855,1881]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="10" pageNumber="11" phylum="Ochrophyta" rank="species" species="areolata">
|
||
<emphasis id="B93A2726FFAA7C40A5EE621EFCD6AE16" box="[682,816,1855,1881]" italics="true" pageId="10" pageNumber="11">D. areolata</emphasis>
|
||
</taxonomicName>
|
||
was rare and mixed with
|
||
<taxonomicName id="4C4E80B7FFAA7C40A328621EFC8DAE32" authority="(Hust.) Houk & Klee" authorityName="Houk & Klee" baseAuthorityName="Hust." class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="10" pageNumber="11" phylum="Ochrophyta" rank="variety" species="stelligera" variety="robusta">
|
||
<emphasis id="B93A2726FFAA7C40A328621EFB19AE16" box="[1132,1279,1855,1881]" italics="true" pageId="10" pageNumber="11">D. stelligera</emphasis>
|
||
(Cleve & Grunow) Houk & Klee var.
|
||
<emphasis id="B93A2726FFAA7C40A554623DFD8FAE32" box="[528,617,1891,1917]" italics="true" pageId="10" pageNumber="11">robusta</emphasis>
|
||
(Hust.) Houk & Klee
|
||
</taxonomicName>
|
||
in the original material. The central area of
|
||
<taxonomicName id="4C4E80B7FFAA7C40A7FB62D9FEA0AEEF" box="[191,326,1926,1952]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="10" pageNumber="11" phylum="Ochrophyta" rank="species" species="areolata">
|
||
<emphasis id="B93A2726FFAA7C40A7FB62D9FEA0AEEF" box="[191,326,1926,1952]" italics="true" pageId="10" pageNumber="11">D. areolata</emphasis>
|
||
</taxonomicName>
|
||
is concave or convex, smooth or consisting of alternating impressions and protrusions of various size with small punctae being mainly located in the depressions. Sometimes domed radiating striae resembling a poorly defined rosette are present in the central area. In
|
||
<taxonomicName id="4C4E80B7FFAA7C40A3586291FB77AEA7" authority="Paillès & Sylvestre & Tonetto & Mazur & Conrod, 2020" authorityName="Paillès & Sylvestre & Tonetto & Mazur & Conrod" authorityYear="2020" box="[1052,1169,1998,2024]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="10" pageNumber="11" phylum="Ochrophyta" rank="species" species="gabinii" status="sp. nov.">
|
||
<emphasis id="B93A2726FFAA7C40A3586291FB77AEA7" box="[1052,1169,1998,2024]" italics="true" pageId="10" pageNumber="11">D. gabinii</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="A2099A5DFFAA7C40A3D36291FB15AEA6" box="[1175,1267,1999,2025]" pageId="10" pageNumber="11" rank="species">sp. nov.</taxonomicNameLabel>
|
||
, the central area is always flat, indeed colliculate but with large punctae inserted in the depressions. Moreover, in
|
||
<taxonomicName id="4C4E80B7FFAB7C41A7F96472FEA7A80A" box="[189,321,299,325]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="species" species="areolata">
|
||
<emphasis id="B93A2726FFAB7C41A7F96472FEA7A80A" box="[189,321,299,325]" italics="true" pageId="11" pageNumber="12">D. areolata</emphasis>
|
||
</taxonomicName>
|
||
, striae are depressed and costae elevated on their entire length, whereas in
|
||
<taxonomicName id="4C4E80B7FFAB7C41A3DE6472FAE9A80A" authority="Paillès & Sylvestre & Tonetto & Mazur & Conrod, 2020" authorityName="Paillès & Sylvestre & Tonetto & Mazur & Conrod" authorityYear="2020" box="[1178,1295,299,325]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="species" species="gabinii" status="sp. nov.">
|
||
<emphasis id="B93A2726FFAB7C41A3DE6472FAE9A80A" box="[1178,1295,299,325]" italics="true" pageId="11" pageNumber="12">D. gabinii</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="A2099A5DFFAB7C41A2536472FA94A809" box="[1303,1394,300,326]" pageId="11" pageNumber="12" rank="species">sp. nov.</taxonomicNameLabel>
|
||
, this feature is restricted to the valve face, the mantle being smooth. Internally, two types of central area could be attributed to
|
||
<taxonomicName id="4C4E80B7FFAB7C41A6FE642EFDA6A8C6" box="[442,576,367,393]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="species" species="areolata">
|
||
<emphasis id="B93A2726FFAB7C41A6FE642EFDA6A8C6" box="[442,576,367,393]" italics="true" pageId="11" pageNumber="12">D. areolata</emphasis>
|
||
</taxonomicName>
|
||
: smooth with no central fultoportula or smooth with a punctum. These variations are also visible in
|
||
<taxonomicName id="4C4E80B7FFAB7C41A54964CCFD62A8E4" authority="Paillès & Sylvestre & Tonetto & Mazur & Conrod, 2020" authorityName="Paillès & Sylvestre & Tonetto & Mazur & Conrod" authorityYear="2020" box="[525,644,401,427]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="species" species="gabinii" status="sp. nov.">
|
||
<emphasis id="B93A2726FFAB7C41A54964CCFD62A8E4" box="[525,644,401,427]" italics="true" pageId="11" pageNumber="12">D. gabinii</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="A2099A5DFFAB7C41A5CF64CCFD03A8E3" box="[651,741,402,428]" pageId="11" pageNumber="12" rank="species">sp. nov.</taxonomicNameLabel>
|
||
Despite uncertainties related to the species described as
|
||
<taxonomicName id="4C4E80B7FFAB7C41A7F964EAFEA7A881" box="[189,321,436,462]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="species" species="areolata">
|
||
<emphasis id="B93A2726FFAB7C41A7F964EAFEA7A881" box="[189,321,436,462]" italics="true" pageId="11" pageNumber="12">D. areolata</emphasis>
|
||
</taxonomicName>
|
||
,
|
||
<taxonomicName id="4C4E80B7FFAB7C41A60A64EAFD8BA881" box="[334,621,436,462]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="variety" species="stelligera" variety="robusta">
|
||
<emphasis id="B93A2726FFAB7C41A60A64EAFE06A881" box="[334,480,436,462]" italics="true" pageId="11" pageNumber="12">D. stelligera</emphasis>
|
||
var.
|
||
<emphasis id="B93A2726FFAB7C41A55064EAFD8BA881" box="[532,621,436,462]" italics="true" pageId="11" pageNumber="12">robusta</emphasis>
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName id="4C4E80B7FFAB7C41A5E664EAFB58A881" authority="(Hust.) Houk & Klee" authorityName="Houk & Klee" baseAuthorityName="Hust." box="[674,1214,436,462]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="variety" species="stelligera" variety="hyalina">
|
||
<emphasis id="B93A2726FFAB7C41A5E664EAFCD5A881" box="[674,819,436,462]" italics="true" pageId="11" pageNumber="12">D. stelligera</emphasis>
|
||
var.
|
||
<emphasis id="B93A2726FFAB7C41A42E64EAFC24A881" box="[874,962,436,462]" italics="true" pageId="11" pageNumber="12">hyalina</emphasis>
|
||
(Hust.) Houk & Klee
|
||
</taxonomicName>
|
||
, the structure of marginal costae and the position of marginal fultoportulae and rimoportula are quite different compared to that of
|
||
<taxonomicName id="4C4E80B7FFAB7C41A66B64A7FE40AB5D" authority="Paillès & Sylvestre & Tonetto & Mazur & Conrod, 2020" authorityName="Paillès & Sylvestre & Tonetto & Mazur & Conrod" authorityYear="2020" box="[303,422,504,530]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="species" species="gabinii" status="sp. nov.">
|
||
<emphasis id="B93A2726FFAB7C41A66B64A7FE40AB5D" box="[303,422,504,530]" italics="true" pageId="11" pageNumber="12">D. gabinii</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="A2099A5DFFAB7C41A6EA64A6FDEEAB5D" box="[430,520,504,530]" pageId="11" pageNumber="12" rank="species">sp. nov.</taxonomicNameLabel>
|
||
Marginal costae can be forked or not. Furthermore, marginal fultoportulae (composed of one tube and two satellite pores placed horizontally) and rimoportula (vertically orientated slit) are inserted within the alveolar chamber.
|
||
</paragraph>
|
||
<paragraph id="8BF1FB34FFAB7C41A7F96722FE1BAC2A" blockId="11.[188,1400,636,1381]" pageId="11" pageNumber="12">
|
||
Another somewhat similar species is
|
||
<taxonomicName id="4C4E80B7FFAB7C41A52B6723FB50ABD9" authority="(Alfinito & Tagliaventi) Houk & Klee" authorityName="Houk & Klee" baseAuthorityName="Alfinito & Tagliaventi" box="[623,1206,636,663]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="species" species="elentarii">
|
||
<emphasis id="B93A2726FFAB7C41A52B6723FD13ABD9" box="[623,757,636,662]" italics="true" pageId="11" pageNumber="12">D. elentarii</emphasis>
|
||
(Alfinito & Tagliaventi) Houk & Klee
|
||
</taxonomicName>
|
||
with flat valves, although it has a large central area with radiate rows of granules and scattered punctae, coarsely striated (9–10 striae in
|
||
<quantity id="4CB656D1FFAB7C41A62A679FFE52AB94" box="[366,436,705,731]" metricMagnitude="-2" metricUnit="m" metricValue="1.0" pageId="11" pageNumber="12" unit="mm" value="10.0">10µm</quantity>
|
||
) and reduced marginal area, and a marginal row of small spinae. Internally, it has similar smooth central area (sometimes with a faint stellate pattern) and similar structure and position of mfp and rm. The only difference is that, internally, in
|
||
<taxonomicName id="4C4E80B7FFAB7C41A4186658FC00AA50" box="[860,998,773,799]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="species" species="elantarii">
|
||
<emphasis id="B93A2726FFAB7C41A4186658FC00AA50" box="[860,998,773,799]" italics="true" pageId="11" pageNumber="12">D. elantarii</emphasis>
|
||
</taxonomicName>
|
||
costae are broadening toward the valve margin with a punctum in the middle giving the impression of forked costae. After reexamination of
|
||
<taxonomicName id="4C4E80B7FFAB7C41A79B6614FE8CAA2C" box="[223,362,841,867]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="species" species="elantarii">
|
||
<emphasis id="B93A2726FFAB7C41A79B6614FE8CAA2C" box="[223,362,841,867]" italics="true" pageId="11" pageNumber="12">D. elantarii</emphasis>
|
||
</taxonomicName>
|
||
by
|
||
<bibRefCitation id="EFDF86C5FFAB7C41A6DE6614FD6EAA2B" author="Knapp J. M. & Furey P. C. & Lowe R. L." box="[410,648,841,868]" pageId="11" pageNumber="12" pagination="429 - 438" refId="ref10722" refString="Knapp J. M., Furey P. C. & Lowe R. L. 2006. A comparison of the morphology and ultrastructure of the diatoms (Bacillaryophyceae) Discostella stelligera and D. elentarii from two lakes in Fiorland, New Zealand. New Zealand Journal of Marine and Freshwater Research 40: 429 - 438. https: // doi. org / 10.1080 / 00288330.2006.9517433" type="journal article" year="2006">
|
||
Knapp
|
||
<emphasis id="B93A2726FFAB7C41A6B76614FDD6AA2C" box="[499,560,841,867]" italics="true" pageId="11" pageNumber="12">et al.</emphasis>
|
||
(2006)
|
||
</bibRefCitation>
|
||
, it appears that the correct striae density is 8–14 and that each collared marginal fultoportula and the single rimoportula are surrounded by satellite pores covered by a cribum. Although we did not use a field emission variable pressure SEM, such structures are absent in
|
||
<taxonomicName id="4C4E80B7FFAB7C41A79F66EFFEB4AA85" authority="Paillès & Sylvestre & Tonetto & Mazur & Conrod, 2020" authorityName="Paillès & Sylvestre & Tonetto & Mazur & Conrod" authorityYear="2020" box="[219,338,944,970]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="species" species="gabinii" status="sp. nov.">
|
||
<emphasis id="B93A2726FFAB7C41A79F66EFFEB4AA85" box="[219,338,944,970]" italics="true" pageId="11" pageNumber="12">D. gabinii</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="A2099A5DFFAB7C41A61D66EEFE55AA85" box="[345,435,944,970]" pageId="11" pageNumber="12" rank="species">sp. nov.</taxonomicNameLabel>
|
||
Interestingly, it is the only morphological feature used to differentiate
|
||
<taxonomicName id="4C4E80B7FFAB7C41A3AA66EFFA90AA85" box="[1262,1398,944,970]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="species" species="elantarii">
|
||
<emphasis id="B93A2726FFAB7C41A3AA66EFFA90AA85" box="[1262,1398,944,970]" italics="true" pageId="11" pageNumber="12">D. elantarii</emphasis>
|
||
</taxonomicName>
|
||
from
|
||
<taxonomicName id="4C4E80B7FFAB7C41A645668DFDE7AAA3" authority="in SEM" authorityName="in SEM" box="[257,513,978,1004]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="species" species="stelligera">
|
||
<emphasis id="B93A2726FFAB7C41A645668DFE7EAAA3" box="[257,408,978,1004]" italics="true" pageId="11" pageNumber="12">D. stelligera</emphasis>
|
||
in SEM
|
||
</taxonomicName>
|
||
(
|
||
<bibRefCitation id="EFDF86C5FFAB7C41A551668CFD1CAAA2" author="Knapp J. M. & Furey P. C. & Lowe R. L." box="[533,762,978,1005]" pageId="11" pageNumber="12" pagination="429 - 438" refId="ref10722" refString="Knapp J. M., Furey P. C. & Lowe R. L. 2006. A comparison of the morphology and ultrastructure of the diatoms (Bacillaryophyceae) Discostella stelligera and D. elentarii from two lakes in Fiorland, New Zealand. New Zealand Journal of Marine and Freshwater Research 40: 429 - 438. https: // doi. org / 10.1080 / 00288330.2006.9517433" type="journal article" year="2006">
|
||
Knapp
|
||
<emphasis id="B93A2726FFAB7C41A534668DFD49AAA3" box="[624,687,978,1004]" italics="true" pageId="11" pageNumber="12">et al.</emphasis>
|
||
2006
|
||
</bibRefCitation>
|
||
). The presence of pores in the girdle band is also a subtle character shared by
|
||
<taxonomicName id="4C4E80B7FFAB7C41A6B566ABFD90AD41" box="[497,630,1012,1038]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="species" species="elentarii">
|
||
<emphasis id="B93A2726FFAB7C41A6B566ABFD90AD41" box="[497,630,1012,1038]" italics="true" pageId="11" pageNumber="12">D. elentarii</emphasis>
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName id="4C4E80B7FFAB7C41A5EB66ABFCC3AD41" authority="Paillès & Sylvestre & Tonetto & Mazur & Conrod, 2020" authorityName="Paillès & Sylvestre & Tonetto & Mazur & Conrod" authorityYear="2020" box="[687,805,1012,1038]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="species" species="gabinii" status="sp. nov.">
|
||
<emphasis id="B93A2726FFAB7C41A5EB66ABFCC3AD41" box="[687,805,1012,1038]" italics="true" pageId="11" pageNumber="12">D. gabinii</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="A2099A5DFFAB7C41A46F66ABFC63AD40" box="[811,901,1013,1039]" pageId="11" pageNumber="12" rank="species">sp. nov.</taxonomicNameLabel>
|
||
that requires further investigation. Despite morphological similarities with
|
||
<taxonomicName id="4C4E80B7FFAB7C41A5796149FD23AD7F" box="[573,709,1046,1072]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="species" species="areolata">
|
||
<emphasis id="B93A2726FFAB7C41A5796149FD23AD7F" box="[573,709,1046,1072]" italics="true" pageId="11" pageNumber="12">D. areolata</emphasis>
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName id="4C4E80B7FFAB7C41A4446149FC6FAD7F" box="[768,905,1046,1072]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="species" species="elentarii">
|
||
<emphasis id="B93A2726FFAB7C41A4446149FC6FAD7F" box="[768,905,1046,1072]" italics="true" pageId="11" pageNumber="12">D. elentarii</emphasis>
|
||
</taxonomicName>
|
||
,
|
||
<taxonomicName id="4C4E80B7FFAB7C41A4DE6149FBF5AD7F" authority="Paillès & Sylvestre & Tonetto & Mazur & Conrod, 2020" authorityName="Paillès & Sylvestre & Tonetto & Mazur & Conrod" authorityYear="2020" box="[922,1043,1046,1072]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="species" species="gabinii" status="sp. nov.">
|
||
<emphasis id="B93A2726FFAB7C41A4DE6149FBF5AD7F" box="[922,1043,1046,1072]" italics="true" pageId="11" pageNumber="12">D. gabinii</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="A2099A5DFFAB7C41A3596149FB9FAD7E" box="[1053,1145,1047,1073]" pageId="11" pageNumber="12" rank="species">sp. nov.</taxonomicNameLabel>
|
||
possesses distinctive characteristics that are sufficient to define a new species. Stelligeroid species of
|
||
<taxonomicName id="4C4E80B7FFAB7C41A3396166FB10AD1D" authorityName=", Hakansson" authorityYear="2002" box="[1149,1270,1080,1106]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Cyclotella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="genus">
|
||
<emphasis id="B93A2726FFAB7C41A3396166FB10AD1D" box="[1149,1270,1080,1106]" italics="true" pageId="11" pageNumber="12">Cyclotella</emphasis>
|
||
</taxonomicName>
|
||
have been transferred to the genus
|
||
<taxonomicName id="4C4E80B7FFAB7C41A69D6104FDBBAD3B" box="[473,605,1114,1140]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="genus">
|
||
<emphasis id="B93A2726FFAB7C41A69D6104FDBBAD3B" box="[473,605,1114,1140]" italics="true" pageId="11" pageNumber="12">Discostella</emphasis>
|
||
</taxonomicName>
|
||
on the basis of the unique position of strutted and labiate processes (
|
||
<bibRefCitation id="EFDF86C5FFAB7C41A7816122FE68ADD8" author="Houk V. & Klee R. & Tanaka H." box="[197,398,1148,1175]" pageId="11" pageNumber="12" pagination="1 - 498" refId="ref10487" refString="Houk V., Klee R. & Tanaka H. 2010. Atlas of freshwater centric diatoms with a brief key and descriptions. Part III. Stephanodiscaceae A, Cyclotella, Tertiarius, Discostella. Fottea 10 (supplement): 1 - 498." type="journal article" year="2010">
|
||
Houk
|
||
<emphasis id="B93A2726FFAB7C41A64A6123FEAEADD9" box="[270,328,1148,1174]" italics="true" pageId="11" pageNumber="12">et al.</emphasis>
|
||
2010
|
||
</bibRefCitation>
|
||
). However, difficulties arise because these species are often heterovalvate and size and morphological variations exist. As reported by Tagliaventi & Cavinaci (2002),
|
||
<bibRefCitation id="EFDF86C5FFAB7C41A32A61C1FEEDAD94" author="Alfinito S. & Tagliaventi N." pageId="11" pageNumber="12" pagination="29 - 38" refId="ref9298" refString="Alfinito S. & Tagliaventi N. 2002. Morphology and taxonomy of Cyclotella elentarii spec. nova a newly described centric diatom from a New Zealand lake. Algological studies 105: 29 - 38. https: // doi. org / 10.1127 / algol _ stud / 105 / 2002 / 29" type="journal article" year="2002">Alfinito & Tagliaventi (2002)</bibRefCitation>
|
||
and
|
||
<bibRefCitation id="EFDF86C5FFAB7C41A601619FFDC9AD93" author="Knapp J. M. & Furey P. C. & Lowe R. L." box="[325,559,1217,1244]" pageId="11" pageNumber="12" pagination="429 - 438" refId="ref10722" refString="Knapp J. M., Furey P. C. & Lowe R. L. 2006. A comparison of the morphology and ultrastructure of the diatoms (Bacillaryophyceae) Discostella stelligera and D. elentarii from two lakes in Fiorland, New Zealand. New Zealand Journal of Marine and Freshwater Research 40: 429 - 438. https: // doi. org / 10.1080 / 00288330.2006.9517433" type="journal article" year="2006">
|
||
Knapp
|
||
<emphasis id="B93A2726FFAB7C41A6D8619CFE3EAD94" box="[412,472,1217,1243]" italics="true" pageId="11" pageNumber="12">et al.</emphasis>
|
||
(2006)
|
||
</bibRefCitation>
|
||
, only minute distinctive features allow one to differentiate
|
||
<taxonomicName id="4C4E80B7FFAB7C41A3AC619CFA89AD94" box="[1256,1391,1217,1243]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="species" species="areolata">
|
||
<emphasis id="B93A2726FFAB7C41A3AC619CFA89AD94" box="[1256,1391,1217,1243]" italics="true" pageId="11" pageNumber="12">D. areolata</emphasis>
|
||
</taxonomicName>
|
||
,
|
||
<taxonomicName id="4C4E80B7FFAB7C41A7F961BAFEB6ADB2" box="[189,336,1251,1277]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="species" species="stelligera">
|
||
<emphasis id="B93A2726FFAB7C41A7F961BAFEB6ADB2" box="[189,336,1251,1277]" italics="true" pageId="11" pageNumber="12">D. stelligera</emphasis>
|
||
</taxonomicName>
|
||
,
|
||
<taxonomicName id="4C4E80B7FFAB7C41A61B61BAFD63ADB2" box="[351,645,1251,1277]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="variety" species="stelligera" variety="robusta">
|
||
<emphasis id="B93A2726FFAB7C41A61B61BAFE14ADB2" box="[351,498,1251,1277]" italics="true" pageId="11" pageNumber="12">D. stelligera</emphasis>
|
||
var.
|
||
<emphasis id="B93A2726FFAB7C41A56961BDFD63ADB2" box="[557,645,1251,1277]" italics="true" pageId="11" pageNumber="12">robusta</emphasis>
|
||
</taxonomicName>
|
||
,
|
||
<taxonomicName id="4C4E80B7FFAB7C41A5D161BAFC53ADB2" box="[661,949,1251,1277]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="variety" species="stelligera" variety="hyalina">
|
||
<emphasis id="B93A2726FFAB7C41A5D161BAFCCEADB2" box="[661,808,1251,1277]" italics="true" pageId="11" pageNumber="12">D. stelligera</emphasis>
|
||
var
|
||
<emphasis id="B93A2726FFAB7C41A41961BDFC53ADB2" box="[861,949,1251,1277]" italics="true" pageId="11" pageNumber="12">hyalina</emphasis>
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName id="4C4E80B7FFAB7C41A4AB61BAFB9EADB2" box="[1007,1144,1251,1277]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="species" species="elantarii">
|
||
<emphasis id="B93A2726FFAB7C41A4AB61BAFB9EADB2" box="[1007,1144,1251,1277]" italics="true" pageId="11" pageNumber="12">D. elantarii</emphasis>
|
||
</taxonomicName>
|
||
. This latter species is endemic to
|
||
<collectingCountry id="F359BBA4FFAB7C41A6036058FE03AC50" box="[327,485,1285,1312]" name="New Zealand" pageId="11" pageNumber="12">New Zealand</collectingCountry>
|
||
and coexists with
|
||
<taxonomicName id="4C4E80B7FFAB7C41A5866058FCB0AC50" box="[706,854,1285,1311]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="species" species="stelligera">
|
||
<emphasis id="B93A2726FFAB7C41A5866058FCB0AC50" box="[706,854,1285,1311]" italics="true" pageId="11" pageNumber="12">D. stelligera</emphasis>
|
||
</taxonomicName>
|
||
in two lakes.
|
||
<bibRefCitation id="EFDF86C5FFAB7C41A4BF6058FB05AC50" author="Knapp J. M. & Furey P. C. & Lowe R. L." box="[1019,1251,1285,1312]" pageId="11" pageNumber="12" pagination="429 - 438" refId="ref10722" refString="Knapp J. M., Furey P. C. & Lowe R. L. 2006. A comparison of the morphology and ultrastructure of the diatoms (Bacillaryophyceae) Discostella stelligera and D. elentarii from two lakes in Fiorland, New Zealand. New Zealand Journal of Marine and Freshwater Research 40: 429 - 438. https: // doi. org / 10.1080 / 00288330.2006.9517433" type="journal article" year="2006">
|
||
Knapp
|
||
<emphasis id="B93A2726FFAB7C41A3166058FB6BAC50" box="[1106,1165,1285,1311]" italics="true" pageId="11" pageNumber="12">et al.</emphasis>
|
||
(2006
|
||
<emphasis id="B93A2726FFAB7C41A39D605BFB05AC50" box="[1241,1251,1285,1311]" italics="true" pageId="11" pageNumber="12">)</emphasis>
|
||
</bibRefCitation>
|
||
suggest that considering the difficulty in differentiating them, they could be sibling species and
|
||
<taxonomicName id="4C4E80B7FFAB7C41A3EA6076FADCAC0E" box="[1198,1338,1319,1345]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="species" species="elantarii">
|
||
<emphasis id="B93A2726FFAB7C41A3EA6076FADCAC0E" box="[1198,1338,1319,1345]" italics="true" pageId="11" pageNumber="12">D. elantarii</emphasis>
|
||
</taxonomicName>
|
||
may descend from
|
||
<taxonomicName id="4C4E80B7FFAB7C41A6276015FE10AC2B" box="[355,502,1354,1380]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="species" species="stelligera">
|
||
<emphasis id="B93A2726FFAB7C41A6276015FE10AC2B" box="[355,502,1354,1380]" italics="true" pageId="11" pageNumber="12">D. stelligera</emphasis>
|
||
</taxonomicName>
|
||
.
|
||
</paragraph>
|
||
<caption id="DF31ABBCFFAB7C41A7F960E1FEE4AEA5" ID-DOI="http://doi.org/10.5281/zenodo.4300776" ID-Zenodo-Dep="4300776" httpUri="https://zenodo.org/record/4300776/files/figure.png" pageId="11" pageNumber="12" targetBox="[292,1299,271,2011]" targetPageId="12">
|
||
<paragraph id="8BF1FB34FFAB7C41A7F960E1FEE4AEA5" blockId="11.[188,1399,1471,2026]" pageId="11" pageNumber="12">
|
||
<emphasis id="B93A2726FFAB7C41A7F960E1FEA6AC96" bold="true" box="[189,320,1471,1497]" pageId="11" pageNumber="12">Figs 51–58</emphasis>
|
||
(next page).
|
||
<typeStatus id="54F54596FFAB7C41A69C609EFDF4AC95" box="[472,530,1472,1498]" pageId="11" pageNumber="12">Type</typeStatus>
|
||
material of fossil lacustrine diatom
|
||
<taxonomicName id="4C4E80B7FFAB7C41A4F060E1FA90AC96" authority="Pailles & Sylvestre" authorityName="Pailles & Sylvestre" authorityYear="2020" box="[948,1398,1471,1498]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="11" pageNumber="12" phylum="Ochrophyta" rank="species" species="gabinii" status="sp. nov.">
|
||
<emphasis id="B93A2726FFAB7C41A4F060E1FB77AC96" box="[948,1169,1471,1497]" italics="true" pageId="11" pageNumber="12">Discostella gabinii</emphasis>
|
||
Paillès & Sylvestre
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="A2099A5DFFAB7C41A7F860BDFEFCACB2" box="[188,282,1507,1533]" pageId="11" pageNumber="12" rank="species">sp. nov.</taxonomicNameLabel>
|
||
, Lake Petén-Itzá (
|
||
<collectingCountry id="F359BBA4FFAB7C41A6A860BDFD94ACB1" box="[492,626,1507,1534]" name="Guatemala" pageId="11" pageNumber="12">Guatemala</collectingCountry>
|
||
); SEM valve views.
|
||
<emphasis id="B93A2726FFAB7C41A42660BCFC99ACB3" bold="true" box="[866,895,1506,1532]" pageId="11" pageNumber="12">51</emphasis>
|
||
. External valve view showing a colliculate central area with scattered areolae, knots and papillae, and a marginal area with finely punctuated radiating striae.
|
||
<emphasis id="B93A2726FFAB7C41A6C56377FE7AAF0C" bold="true" box="[385,412,1577,1603]" pageId="11" pageNumber="12">52</emphasis>
|
||
. External view of a large specimen with numerous areolae in the central area; the striae have rounded ends near the margin.
|
||
<emphasis id="B93A2726FFAB7C41A58C6312FD03AF29" bold="true" box="[712,741,1612,1638]" pageId="11" pageNumber="12">53</emphasis>
|
||
. Valve view of a complete corroded frustule showing valve interior with medium sized alveoli and marginal fultoportulae located in the middle of every 3
|
||
<superScript id="7C3B567CFFAB7C41A22C6331FA90AF32" attach="none" box="[1384,1398,1647,1661]" fontSize="6" pageId="11" pageNumber="12">rd</superScript>
|
||
to 5
|
||
<superScript id="7C3B567CFFAB7C41A7A863CCFF1FAFEF" attach="left" box="[236,249,1682,1696]" fontSize="6" pageId="11" pageNumber="12">th</superScript>
|
||
alveoli; open valvocopula present.
|
||
<emphasis id="B93A2726FFAB7C41A5EC63CCFD23AFE3" bold="true" box="[680,709,1682,1708]" pageId="11" pageNumber="12">54</emphasis>
|
||
. External openings of marginal fultoportulae located just below the crescent end of the striae (white arrowheads).
|
||
<emphasis id="B93A2726FFAB7C41A42B63E8FC6AAF9F" bold="true" box="[879,908,1718,1744]" pageId="11" pageNumber="12">55</emphasis>
|
||
. Internal valve view with medium sized alveoli and a large expansion of the smooth central lamina; marginal fultoportulae located on every 3
|
||
<superScript id="7C3B567CFFAB7C41A22C6386FA90AFA9" attach="none" box="[1384,1398,1752,1766]" fontSize="6" pageId="11" pageNumber="12">rd</superScript>
|
||
to 5
|
||
<superScript id="7C3B567CFFAB7C41A7AF63A2FF1EAE45" attach="left" box="[235,248,1788,1802]" fontSize="6" pageId="11" pageNumber="12">th</superScript>
|
||
alveoli.
|
||
<emphasis id="B93A2726FFAB7C41A62763A2FE99AE59" bold="true" box="[355,383,1788,1814]" pageId="11" pageNumber="12">56</emphasis>
|
||
. Internal valve view with smooth central area with a single areola; open valvocopula present.
|
||
<emphasis id="B93A2726FFAB7C41A65B627EFEDAAE75" bold="true" box="[287,316,1824,1850]" pageId="11" pageNumber="12">57</emphasis>
|
||
. Detail view of valve margin; marginal fultoportulae composed of one tube with two satellite pores positioned on the external ends of the alveoli; rimoportula with vertically orientated lips, located between two costae at the edge of an alveolus and within the ring of marginal fultoportulae.
|
||
<emphasis id="B93A2726FFAB7C41A2476238FAC6AECF" bold="true" box="[1283,1312,1894,1920]" pageId="11" pageNumber="12">58</emphasis>
|
||
. Detail view of the valve margin with an eroded marginal fultoportula at the edge of the alveolus; note a row of fine pores on the interior of the girdle band (white arrowheads). Scale bars = 51–56 =
|
||
<quantity id="4CB656D1FFAB7C41A38D62F2FAECAE88" box="[1225,1290,1964,1991]" metricMagnitude="-3" metricUnit="m" metricValue="2.0" pageId="11" pageNumber="12" unit="mm" value="2.0">2 µm</quantity>
|
||
; 57–58 =
|
||
<quantity id="4CB656D1FFAB7C41A7F9628EFF18AEA5" box="[189,254,2000,2026]" metricMagnitude="-3" metricUnit="m" metricValue="1.0" pageId="11" pageNumber="12" unit="mm" value="1.0">1 µm</quantity>
|
||
.
|
||
</paragraph>
|
||
</caption>
|
||
<paragraph id="8BF1FB34FFAD7C47A7F96454FD84A869" blockId="13.[189,610,266,295]" box="[189,610,266,295]" pageId="13" pageNumber="14">
|
||
<emphasis id="B93A2726FFAD7C47A7F96454FD84A869" bold="true" box="[189,610,266,295]" italics="true" pageId="13" pageNumber="14">Stratigraphic diatom succession</emphasis>
|
||
</paragraph>
|
||
<paragraph id="8BF1FB34FFAD7C47A7F9641EFB6CAA5E" blockId="13.[188,1399,320,785]" pageId="13" pageNumber="14">
|
||
The base of the section (84 ka) is characterized by an assemblage dominated (58–90%) by
|
||
<taxonomicName id="4C4E80B7FFAD7C47A3AD641EFDC4A831" authority="(Ehrenb.) Simonsen" authorityName="Simonsen" baseAuthorityName="Ehrenb." class="Bacillariophyceae" family="Aulacoseiraceae" genus="Aulacoseira" higherTaxonomySource="GBIF" kingdom="Chromista" order="Aulacoseirales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="species" species="granulata">
|
||
<emphasis id="B93A2726FFAD7C47A3AD641EFED7A831" italics="true" pageId="13" pageNumber="14">Aulacoseira granulata</emphasis>
|
||
(Ehrenb.) Simonsen
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName id="4C4E80B7FFAD7C47A51D643BFC30A831" authority="(Grunow) Simonsen" authorityName="Simonsen" baseAuthorityName="Grunow" box="[601,982,356,383]" class="Bacillariophyceae" family="Aulacoseiraceae" genus="Aulacoseira" higherTaxonomySource="GBIF" kingdom="Chromista" order="Aulacoseirales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="species" species="ambigua">
|
||
<emphasis id="B93A2726FFAD7C47A51D643BFD06A831" box="[601,736,356,383]" italics="true" pageId="13" pageNumber="14">A. ambigua</emphasis>
|
||
(Grunow) Simonsen
|
||
</taxonomicName>
|
||
(
|
||
<figureCitation id="1375E7B1FFAD7C47A4A1643AFBDBA830" box="[997,1085,356,383]" captionStart="Fig" captionStartId="13.[189,232,1963,1989]" captionTargetBox="[214,1354,873,1892]" captionTargetId="figure-213@13.[189,1398,854,1901]" captionTargetPageId="13" captionText="Fig. 59. Diagram showing the succession of Stephanodiscaceae Glezer & Makarova in Pleistocene sediments (0–84 ka) from Lake Petén-Itzá (Guatemala)." figureDoi="http://doi.org/10.5281/zenodo.4298432" httpUri="https://zenodo.org/record/4298432/files/figure.png" pageId="13" pageNumber="14">Fig. 59</figureCitation>
|
||
).
|
||
<taxonomicName id="4C4E80B7FFAD7C47A314643AFA90A831" box="[1104,1398,356,382]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Cyclotella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="species" species="meneghiniana">
|
||
<emphasis id="B93A2726FFAD7C47A314643AFA90A831" box="[1104,1398,356,382]" italics="true" pageId="13" pageNumber="14">Cyclotella meneghiniana</emphasis>
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName id="4C4E80B7FFAD7C47A7B164D7FE13A8EC" box="[245,501,393,419]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="species" species="stelligera">
|
||
<emphasis id="B93A2726FFAD7C47A7B164D7FE13A8EC" box="[245,501,393,419]" italics="true" pageId="13" pageNumber="14">Discostella stelligera</emphasis>
|
||
</taxonomicName>
|
||
occurred punctually (<20%) between 82.3 and 80 ka. The
|
||
<taxonomicName id="4C4E80B7FFAD7C47A3AD64D7FA91A8EC" authorityName="G.H.K.Thwaites" authorityYear="1848" box="[1257,1399,393,419]" class="Bacillariophyceae" family="Aulacoseiraceae" genus="Aulacoseira" higherTaxonomySource="GBIF" kingdom="Chromista" order="Aulacoseirales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="genus">
|
||
<emphasis id="B93A2726FFAD7C47A3AD64D7FA91A8EC" box="[1257,1399,393,419]" italics="true" pageId="13" pageNumber="14">Aulacoseira</emphasis>
|
||
</taxonomicName>
|
||
dominated assemblage persists up to 70 ka then greatly recedes (<20%) up to 1.5 ka. From around 60 ka, we observed successive occurrences of
|
||
<taxonomicName id="4C4E80B7FFAD7C47A5C9648DFCC6A8A3" box="[653,800,466,492]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="species" species="stelligera">
|
||
<emphasis id="B93A2726FFAD7C47A5C9648DFCC6A8A3" box="[653,800,466,492]" italics="true" pageId="13" pageNumber="14">D. stelligera</emphasis>
|
||
</taxonomicName>
|
||
,
|
||
<taxonomicName id="4C4E80B7FFAD7C47A46A648CFC11A8A3" box="[814,1015,466,492]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Cyclotella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="species" species="meneghiniana">
|
||
<emphasis id="B93A2726FFAD7C47A46A648CFC11A8A3" box="[814,1015,466,492]" italics="true" pageId="13" pageNumber="14">C. meneghiniana</emphasis>
|
||
</taxonomicName>
|
||
,
|
||
<taxonomicName id="4C4E80B7FFAD7C47A341648CFB05A8A3" authority="Paillès & Sylvestre & Tonetto & Mazur & Conrod, 2020" authorityName="Paillès & Sylvestre & Tonetto & Mazur & Conrod" authorityYear="2020" box="[1029,1251,466,492]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="species" species="gabinii" status="sp. nov.">
|
||
<emphasis id="B93A2726FFAD7C47A341648CFB05A8A3" box="[1029,1251,466,492]" italics="true" pageId="13" pageNumber="14">Discostella gabinii</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="A2099A5DFFAD7C47A3AF648DFAA3A8A2" box="[1259,1349,467,493]" pageId="13" pageNumber="14" rank="species">sp. nov.</taxonomicNameLabel>
|
||
and
|
||
<taxonomicName id="4C4E80B7FFAD7C47A7F964A9FDC6AB5E" authority="Grunow. At" authorityName="Grunow. At" box="[189,544,503,529]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Cyclotella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="species" species="caspia">
|
||
<emphasis id="B93A2726FFAD7C47A7F964A9FE6AAB5F" box="[189,396,503,529]" italics="true" pageId="13" pageNumber="14">Cyclotella caspia</emphasis>
|
||
Grunow. At
|
||
</taxonomicName>
|
||
45 ka,
|
||
<taxonomicName id="4C4E80B7FFAD7C47A5C464A9FC9AAB5F" authorityName="Sylvestre, Pailles & Escobar" authorityYear="2018" box="[640,892,503,529]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Cyclotella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="species" species="petenensis">
|
||
<emphasis id="B93A2726FFAD7C47A5C464A9FC9AAB5F" box="[640,892,503,529]" italics="true" pageId="13" pageNumber="14">Cyclotella petenensis</emphasis>
|
||
</taxonomicName>
|
||
takes over the assemblage (73–97%) then declines abruptly at 31.5 ka. Prior to the collapse of
|
||
<taxonomicName id="4C4E80B7FFAD7C47A4666742FC58AB7A" authorityName="Sylvestre, Pailles & Escobar" authorityYear="2018" box="[802,958,540,566]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Cyclotella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="species" species="petenensis">
|
||
<emphasis id="B93A2726FFAD7C47A4666742FC58AB7A" box="[802,958,540,566]" italics="true" pageId="13" pageNumber="14">C. petenensis</emphasis>
|
||
</taxonomicName>
|
||
,
|
||
<taxonomicName id="4C4E80B7FFAD7C47A4896745FB4AAB7A" authority="Paillès & Sylvestre & Tonetto & Mazur & Conrod, 2020" authorityName="Paillès & Sylvestre & Tonetto & Mazur & Conrod" authorityYear="2020" box="[973,1196,539,565]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="species" species="gabinii" status="sp. nov.">
|
||
<emphasis id="B93A2726FFAD7C47A4896745FB4AAB7A" box="[973,1196,539,565]" italics="true" pageId="13" pageNumber="14">Discostella gabinii</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="A2099A5DFFAD7C47A3F76742FAE8AB79" box="[1203,1294,540,566]" pageId="13" pageNumber="14" rank="species">sp. nov.</taxonomicNameLabel>
|
||
returned with fluctuating percentages for about 5 ka. Then,
|
||
<taxonomicName id="4C4E80B7FFAD7C47A455671EFC3EAB15" box="[785,984,576,602]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Cyclocostis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="species" species="rolfii">
|
||
<emphasis id="B93A2726FFAD7C47A455671EFC3EAB15" box="[785,984,576,602]" italics="true" pageId="13" pageNumber="14">Cyclocostis rolfii</emphasis>
|
||
</taxonomicName>
|
||
gen et sp. nov. emerges at 26.9 ka, develops with fluctuating abundances with
|
||
<taxonomicName id="4C4E80B7FFAD7C47A5FD673AFBF2AB30" authority="Hust." authorityName="Hust." box="[697,1044,612,639]" class="Monogenea" family="Capsalidae" genus="Nitzschia" kingdom="Animalia" order="Capsalidea" pageId="13" pageNumber="14" phylum="Platyhelminthes" rank="species" species="amphibioides">
|
||
<emphasis id="B93A2726FFAD7C47A5FD673AFC2DAB31" box="[697,971,612,638]" italics="true" pageId="13" pageNumber="14">Nitzschia amphibioides</emphasis>
|
||
Hust.
|
||
</taxonomicName>
|
||
,
|
||
<taxonomicName id="4C4E80B7FFAD7C47A364673AFA95AB31" authority="Thwaites" authorityName="Thwaites" box="[1056,1395,612,638]" class="Bacillariophyceae" family="Naviculaceae" genus="Mastogloia" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="species" species="smithii">
|
||
<emphasis id="B93A2726FFAD7C47A364673AFB1BAB31" box="[1056,1277,612,638]" italics="true" pageId="13" pageNumber="14">Mastogloia smithii</emphasis>
|
||
Thwaites
|
||
</taxonomicName>
|
||
,
|
||
<taxonomicName id="4C4E80B7FFAD7C47A7F867D4FDC1ABEC" authority="(C. Agardh) Cleve" authorityName="Cleve" baseAuthorityName="C. Agardh" box="[188,551,649,676]" class="Bacillariophyceae" family="Naviculaceae" genus="Mastogloia" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="species" species="elliptica">
|
||
<emphasis id="B93A2726FFAD7C47A7F867D4FEA1ABEC" box="[188,327,649,675]" italics="true" pageId="13" pageNumber="14">M. elliptica</emphasis>
|
||
(C.Agardh) Cleve
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName id="4C4E80B7FFAD7C47A52267D7FC05ABEC" authority="Hust. At" authorityName="Hust. At" box="[614,995,649,675]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" higherTaxonomySource="CoL" kingdom="Animalia" order="Naviculales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="species" species="seminuloides">
|
||
<emphasis id="B93A2726FFAD7C47A52267D7FC95ABEC" box="[614,883,649,675]" italics="true" pageId="13" pageNumber="14">Navicula seminuloides</emphasis>
|
||
Hust. At
|
||
</taxonomicName>
|
||
22.2 ka,
|
||
<taxonomicName id="4C4E80B7FFAD7C47A31C67D7FAC4ABEC" box="[1112,1314,649,675]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Cyclocostis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="species" species="rolfii">
|
||
<emphasis id="B93A2726FFAD7C47A31C67D7FAC4ABEC" box="[1112,1314,649,675]" italics="true" pageId="13" pageNumber="14">Cyclocostis rolfii</emphasis>
|
||
</taxonomicName>
|
||
gen et sp. nov. disappears definitely while
|
||
<taxonomicName id="4C4E80B7FFAD7C47A52667F3FCBBAB88" authorityName="Sylvestre, Pailles & Escobar" authorityYear="2018" box="[610,861,685,711]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Cyclotella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="species" species="petenensis">
|
||
<emphasis id="B93A2726FFAD7C47A52667F3FCBBAB88" box="[610,861,685,711]" italics="true" pageId="13" pageNumber="14">Cyclotella petenensis</emphasis>
|
||
</taxonomicName>
|
||
reoccurs. At first,
|
||
<taxonomicName id="4C4E80B7FFAD7C47A37367F0FB32AB88" authorityName="Sylvestre, Pailles & Escobar" authorityYear="2018" box="[1079,1236,686,712]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Cyclotella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="species" species="petenensis">
|
||
<emphasis id="B93A2726FFAD7C47A37367F0FB32AB88" box="[1079,1236,686,712]" italics="true" pageId="13" pageNumber="14">C. petenensis</emphasis>
|
||
</taxonomicName>
|
||
coexists with
|
||
<taxonomicName id="4C4E80B7FFAD7C47A7F9678CFE7DABA3" authority="Paillès & Sylvestre & Tonetto & Mazur & Conrod, 2020" authorityName="Paillès & Sylvestre & Tonetto & Mazur & Conrod" authorityYear="2020" box="[189,411,722,748]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="species" species="gabinii" status="sp. nov.">
|
||
<emphasis id="B93A2726FFAD7C47A7F9678CFE7DABA3" box="[189,411,722,748]" italics="true" pageId="13" pageNumber="14">Discostella gabinii</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="A2099A5DFFAD7C47A6E4678DFE1CABA2" box="[416,506,723,749]" pageId="13" pageNumber="14" rank="species">sp. nov.</taxonomicNameLabel>
|
||
(10–60%) then it takes over when
|
||
<taxonomicName id="4C4E80B7FFAD7C47A4C8678DFBE4ABA3" authority="Paillès & Sylvestre & Tonetto & Mazur & Conrod, 2020" authorityName="Paillès & Sylvestre & Tonetto & Mazur & Conrod" authorityYear="2020" box="[908,1026,722,748]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="species" species="gabinii" status="sp. nov.">
|
||
<emphasis id="B93A2726FFAD7C47A4C8678DFBE4ABA3" box="[908,1026,722,748]" italics="true" pageId="13" pageNumber="14">D. gabinii</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="A2099A5DFFAD7C47A34C678DFB87ABA2" box="[1032,1121,723,749]" pageId="13" pageNumber="14" rank="species">sp. nov.</taxonomicNameLabel>
|
||
declines. The dominant
|
||
<taxonomicName id="4C4E80B7FFAD7C47A7F867A9FEBEAA5F" authorityName="Sylvestre, Pailles & Escobar" authorityYear="2018" box="[188,344,759,785]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Cyclotella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="species" species="petenensis">
|
||
<emphasis id="B93A2726FFAD7C47A7F867A9FEBEAA5F" box="[188,344,759,785]" italics="true" pageId="13" pageNumber="14">C. petenensis</emphasis>
|
||
</taxonomicName>
|
||
persists until 16.1 ka and does not reoccur thereafter in the sequence.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<caption id="DF31ABBCFFAD7C47A7F962F5FCABAEA6" ID-DOI="http://doi.org/10.5281/zenodo.4298432" ID-Zenodo-Dep="4298432" httpUri="https://zenodo.org/record/4298432/files/figure.png" pageId="13" pageNumber="14" startId="13.[189,232,1963,1989]" targetBox="[214,1354,873,1892]" targetPageId="13">
|
||
<paragraph id="8BF1FB34FFAD7C47A7F962F5FCABAEA6" blockId="13.[189,1399,1963,2025]" pageId="13" pageNumber="14">
|
||
<emphasis id="B93A2726FFAD7C47A7F962F5FEF8AE8A" bold="true" box="[189,286,1963,1989]" pageId="13" pageNumber="14">Fig. 59.</emphasis>
|
||
Diagram showing the succession of
|
||
<taxonomicName id="4C4E80B7FFAD7C47A5A362F5FA91AE8A" authority="Glezer & Makarova in Pleistocene" authorityName="Glezer & Makarova in Pleistocene" box="[743,1399,1963,1989]" class="Bacillariophyceae" family="Stephanodiscaceae" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="family">Stephanodiscaceae Glezer & Makarova in Pleistocene</taxonomicName>
|
||
sediments (0–84 ka) from Lake Petén-Itzá (Guatemala).
|
||
</paragraph>
|
||
</caption>
|
||
<subSubSection id="C354A8BFFFAE7C44A7F96454FD13ACA9" pageId="14" pageNumber="15" type="biology_ecology">
|
||
<paragraph id="8BF1FB34FFAE7C44A7F96454FD7FA868" blockId="14.[189,665,266,295]" box="[189,665,266,295]" pageId="14" pageNumber="15">
|
||
<emphasis id="B93A2726FFAE7C44A7F96454FD7FA868" bold="true" box="[189,665,266,295]" italics="true" pageId="14" pageNumber="15">Ecology and associated diatom flora</emphasis>
|
||
</paragraph>
|
||
<paragraph id="8BF1FB34FFAE7C44A7F96461FBABA8A7" blockId="14.[188,1399,319,488]" pageId="14" pageNumber="15">
|
||
In the modern dataset (
|
||
<bibRefCitation id="EFDF86C5FFAE7C44A6FA6461FD67A816" author="Perez L. & Lorenschat J. & Massaferro J. & Pailles C. & Sylvestre F. & Hollwedel W. & Brandorff G. - O. & Brenner M. & Islebe G. & Socorro Lozano M. & Scharf B. & Schwalb A." box="[446,641,319,345]" pageId="14" pageNumber="15" pagination="603 - 644" refId="ref11990" refString="Perez L., Lorenschat J., Massaferro J., Pailles C., Sylvestre F., Hollwedel W., Brandorff G. - O., Brenner M., Islebe G., del Socorro Lozano M., Scharf B. & Schwalb A. 2013. Bioindicators of climate and trophic status in aquatic ecosystems of the northern Neotropics. Revista de Biologia Tropical 61 (2): 603 - 644. https: // doi. org / 10.15517 / rbt. v 61 i 2.11164" type="journal article" year="2013">
|
||
Pérez
|
||
<emphasis id="B93A2726FFAE7C44A547641EFDD8A816" box="[515,574,319,345]" italics="true" pageId="14" pageNumber="15">et al.</emphasis>
|
||
2013
|
||
</bibRefCitation>
|
||
),
|
||
<taxonomicName id="4C4E80B7FFAE7C44A5D76461FC88A816" authority="Paillès & Sylvestre & Tonetto & Mazur & Conrod, 2020" authorityName="Paillès & Sylvestre & Tonetto & Mazur & Conrod" authorityYear="2020" box="[659,878,319,345]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="14" pageNumber="15" phylum="Ochrophyta" rank="species" species="gabinii" status="sp. nov.">
|
||
<emphasis id="B93A2726FFAE7C44A5D76461FC88A816" box="[659,878,319,345]" italics="true" pageId="14" pageNumber="15">Discostella gabinii</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="A2099A5DFFAE7C44A4376461FC2DA816" box="[883,971,319,345]" pageId="14" pageNumber="15" rank="species">sp. nov.</taxonomicNameLabel>
|
||
was initially identified as “
|
||
<emphasis id="B93A2726FFAE7C44A3BA6461FF13A832" italics="true" pageId="14" pageNumber="15">
|
||
<taxonomicName id="4C4E80B7FFAE7C44A3BA6461FA91A816" authorityName=", Hakansson" authorityYear="2002" box="[1278,1399,319,345]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Cyclotella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="14" pageNumber="15" phylum="Ochrophyta" rank="genus">Cyclotella</taxonomicName>
|
||
sp22
|
||
</emphasis>
|
||
” (code CP22) and another species was identified as “
|
||
<taxonomicName id="4C4E80B7FFAE7C44A43F643CFC19A833" box="[891,1023,354,380]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="14" pageNumber="15" phylum="Ochrophyta" rank="genus">
|
||
<emphasis id="B93A2726FFAE7C44A43F643CFC19A833" box="[891,1023,354,380]" italics="true" pageId="14" pageNumber="15">Discostella</emphasis>
|
||
</taxonomicName>
|
||
aff.
|
||
<emphasis id="B93A2726FFAE7C44A37C643CFB1CA833" box="[1080,1274,354,380]" italics="true" pageId="14" pageNumber="15">pseudostelligera</emphasis>
|
||
” (CYAP). When analyzing the fossil flora and diagnosing
|
||
<taxonomicName id="4C4E80B7FFAE7C44A5A064D9FCBCA8EF" authority="Paillès & Sylvestre & Tonetto & Mazur & Conrod, 2020" authorityName="Paillès & Sylvestre & Tonetto & Mazur & Conrod" authorityYear="2020" box="[740,858,390,416]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="14" pageNumber="15" phylum="Ochrophyta" rank="species" species="gabinii" status="sp. nov.">
|
||
<emphasis id="B93A2726FFAE7C44A5A064D9FCBCA8EF" box="[740,858,390,416]" italics="true" pageId="14" pageNumber="15">D. gabinii</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="A2099A5DFFAE7C44A41B64D9FC5DA8EE" box="[863,955,391,417]" pageId="14" pageNumber="15" rank="species">sp. nov.</taxonomicNameLabel>
|
||
, we re-examined modern samples and observed that the two species were similar. “
|
||
<taxonomicName id="4C4E80B7FFAE7C44A59D64F4FCBBA88B" box="[729,861,426,452]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="14" pageNumber="15" phylum="Ochrophyta" rank="genus">
|
||
<emphasis id="B93A2726FFAE7C44A59D64F4FCBBA88B" box="[729,861,426,452]" italics="true" pageId="14" pageNumber="15">Discostella</emphasis>
|
||
</taxonomicName>
|
||
aff.
|
||
<emphasis id="B93A2726FFAE7C44A4D264F4FBBEA88B" box="[918,1112,426,452]" italics="true" pageId="14" pageNumber="15">pseudostelligera</emphasis>
|
||
” and “
|
||
<emphasis id="B93A2726FFAE7C44A3F464F4FA8CA88B" box="[1200,1386,426,452]" italics="true" pageId="14" pageNumber="15">
|
||
<taxonomicName id="4C4E80B7FFAE7C44A3F464F4FACFA88B" authorityName=", Hakansson" authorityYear="2002" box="[1200,1321,426,452]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Cyclotella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="14" pageNumber="15" phylum="Ochrophyta" rank="genus">Cyclotella</taxonomicName>
|
||
sp22
|
||
</emphasis>
|
||
” were therefore combined together under the name
|
||
<taxonomicName id="4C4E80B7FFAE7C44A4496493FC0DA8A8" authority="Paillès & Sylvestre & Tonetto & Mazur & Conrod, 2020" authorityName="Paillès & Sylvestre & Tonetto & Mazur & Conrod" authorityYear="2020" box="[781,1003,461,487]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="14" pageNumber="15" phylum="Ochrophyta" rank="species" species="gabinii" status="sp. nov.">
|
||
<emphasis id="B93A2726FFAE7C44A4496493FC0DA8A8" box="[781,1003,461,487]" italics="true" pageId="14" pageNumber="15">Discostella gabinii</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="A2099A5DFFAE7C44A4B76490FBABA8A7" box="[1011,1101,462,488]" pageId="14" pageNumber="15" rank="species">sp. nov.</taxonomicNameLabel>
|
||
</paragraph>
|
||
<paragraph id="8BF1FB34FFAE7C44A7F96751FA9EAA9A" blockId="14.[189,1400,527,981]" pageId="14" pageNumber="15">
|
||
Conductivity, which is related to the precipitation gradient and marine influence on the
|
||
<collectingRegion id="498A35D6FFAE7C44A25C674EFA90AB65" box="[1304,1398,528,554]" country="Mexico" name="Yucatan" pageId="14" pageNumber="15">Yucatan</collectingRegion>
|
||
Peninsula, is the main variable that structures diatom, ostracod and cladoceran communities (
|
||
<bibRefCitation id="EFDF86C5FFAE7C44A277676DFEA7AB3E" author="Perez L. & Lorenschat J. & Massaferro J. & Pailles C. & Sylvestre F. & Hollwedel W. & Brandorff G. - O. & Brenner M. & Islebe G. & Socorro Lozano M. & Scharf B. & Schwalb A." pageId="14" pageNumber="15" pagination="603 - 644" refId="ref11990" refString="Perez L., Lorenschat J., Massaferro J., Pailles C., Sylvestre F., Hollwedel W., Brandorff G. - O., Brenner M., Islebe G., del Socorro Lozano M., Scharf B. & Schwalb A. 2013. Bioindicators of climate and trophic status in aquatic ecosystems of the northern Neotropics. Revista de Biologia Tropical 61 (2): 603 - 644. https: // doi. org / 10.15517 / rbt. v 61 i 2.11164" type="journal article" year="2013">
|
||
Pérez
|
||
<emphasis id="B93A2726FFAE7C44A7F96709FF1FAB3F" box="[189,249,598,624]" italics="true" pageId="14" pageNumber="15">et al.</emphasis>
|
||
2013
|
||
</bibRefCitation>
|
||
).
|
||
<taxonomicName id="4C4E80B7FFAE7C44A6126708FDD3AB3F" authority="Paillès & Sylvestre & Tonetto & Mazur & Conrod, 2020" authorityName="Paillès & Sylvestre & Tonetto & Mazur & Conrod" authorityYear="2020" box="[342,565,598,624]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="14" pageNumber="15" phylum="Ochrophyta" rank="species" species="gabinii" status="sp. nov.">
|
||
<emphasis id="B93A2726FFAE7C44A6126708FDD3AB3F" box="[342,565,598,624]" italics="true" pageId="14" pageNumber="15">Discostella gabinii</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="A2099A5DFFAE7C44A5796709FD7EAB3E" box="[573,664,599,625]" pageId="14" pageNumber="15" rank="species">sp. nov.</taxonomicNameLabel>
|
||
occurs in 11 water bodies of the
|
||
<collectingRegion id="498A35D6FFAE7C44A3676709FB67AB3E" box="[1059,1153,599,625]" country="Mexico" name="Yucatan" pageId="14" pageNumber="15">Yucatan</collectingRegion>
|
||
Peninsula (
|
||
<tableCitation id="C6CCCE8FFFAE7C44A2486708FA83AB3E" box="[1292,1381,598,625]" captionStart="Table 1" captionStartId="15.[189,258,265,291]" captionTargetBox="[193,1395,437,1877]" captionTargetId="graphics-11@15.[189,1398,428,1887]" captionTargetPageId="15" captionText="Table 1 (continued on the next page). Selected limnological and chemical data from lakes (single measurements in 2005 or 2008) containingDiscostella gabinii Paillès & Sylvestre sp. nov. and Cyclotella petenensis Sylvestre, Paillès & Escobar in the Yucatan Peninsula after Pérez et al. (2013). n.d. = not determined." httpUri="http://table.plazi.org/id/DF31ABBCFFAF7C45A7F96457FEADA8C3" pageId="14" pageNumber="15" tableUuid="DF31ABBCFFAF7C45A7F96457FEADA8C3">Table 1</tableCitation>
|
||
). In the Guatemalan highlands, its maximum occurrence (13%) was in Lake Amatitlan, a hypereutrophic alkaline lake spreading over
|
||
<quantity id="4CB656D1FFAE7C44A56A67C3FD73ABF7" box="[558,661,669,696]" metricMagnitude="4" metricUnit="m" metricValue="1.52" pageId="14" pageNumber="15" unit="km" value="15.2">15.2 km</quantity>
|
||
<superScript id="7C3B567CFFAE7C44A5D267C3FD79ABE4" attach="left" box="[662,671,669,683]" fontSize="6" pageId="14" pageNumber="15">2</superScript>
|
||
at
|
||
<quantity id="4CB656D1FFAE7C44A59667C0FCD5ABF7" box="[722,819,670,696]" metricMagnitude="3" metricUnit="m" metricValue="1.2" pageId="14" pageNumber="15" unit="m" value="1200.0">1200 m</quantity>
|
||
a.s.l. altitude. Water was calcium-bicarbonate rich, warm (22.6°C), with electrical conductivity of 630 µS/cm and high dissolved oxygen content (
|
||
<quantity id="4CB656D1FFAE7C44A78167BBFEC3ABB0" box="[197,293,741,767]" metricMagnitude="-5" metricUnit="kg" metricValue="1.78" pageId="14" pageNumber="15" unit="mg" value="17.8">17.8 mg</quantity>
|
||
/L). Subdominant species were
|
||
<taxonomicName id="4C4E80B7FFAE7C44A5DD67BBFC46ABB0" box="[665,928,741,767]" class="Bacillariophyceae" family="Aulacoseiraceae" genus="Aulacoseira" higherTaxonomySource="GBIF" kingdom="Chromista" order="Aulacoseirales" pageId="14" pageNumber="15" phylum="Ochrophyta" rank="species" species="granulata">
|
||
<emphasis id="B93A2726FFAE7C44A5DD67BBFC46ABB0" box="[665,928,741,767]" italics="true" pageId="14" pageNumber="15">Aulacoseira granulata</emphasis>
|
||
</taxonomicName>
|
||
,
|
||
<taxonomicName id="4C4E80B7FFAE7C44A4EA67BBFB34ABB0" box="[942,1234,741,767]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Cyclotella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="14" pageNumber="15" phylum="Ochrophyta" rank="species" species="meneghiniana">
|
||
<emphasis id="B93A2726FFAE7C44A4EA67BBFB34ABB0" box="[942,1234,741,767]" italics="true" pageId="14" pageNumber="15">Cyclotella meneghiniana</emphasis>
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName id="4C4E80B7FFAE7C44A24C67BBFD7FAA6C" authority="Hust. In Cenotes Juarez" authorityName="Hust. In Cenotes Juarez" class="Monogenea" family="Capsalidae" genus="Nitzschia" kingdom="Animalia" order="Capsalidea" pageId="14" pageNumber="15" phylum="Platyhelminthes" rank="species" species="pseudofonticola">
|
||
<emphasis id="B93A2726FFAE7C44A24C67BBFE9EAA6D" italics="true" pageId="14" pageNumber="15">Nitzschia pseudofonticola</emphasis>
|
||
Hust. In Cenotes Juarez
|
||
</taxonomicName>
|
||
,
|
||
<taxonomicName id="4C4E80B7FFAE7C44A5E16657FCFDAA6D" authority="Paillès & Sylvestre & Tonetto & Mazur & Conrod, 2020" authorityName="Paillès & Sylvestre & Tonetto & Mazur & Conrod" authorityYear="2020" box="[677,795,776,802]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="14" pageNumber="15" phylum="Ochrophyta" rank="species" species="gabinii" status="sp. nov.">
|
||
<emphasis id="B93A2726FFAE7C44A5E16657FCFDAA6D" box="[677,795,776,802]" italics="true" pageId="14" pageNumber="15">D. gabinii</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="A2099A5DFFAE7C44A4676657FC9BAA6C" box="[803,893,777,803]" pageId="14" pageNumber="15" rank="species">sp. nov.</taxonomicNameLabel>
|
||
reached 4.8% in an assemblage dominated by
|
||
<taxonomicName id="4C4E80B7FFAE7C44A7A26672FD04AA09" authority="(Grunow) Czarn." authorityName="Czarn." baseAuthorityName="Grunow" box="[230,738,812,838]" class="Bacillariophyceae" family="Achnanthidiaceae" genus="Achnanthidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="14" pageNumber="15" phylum="Ochrophyta" rank="species" species="exiguum">
|
||
<emphasis id="B93A2726FFAE7C44A7A26672FDEEAA09" box="[230,520,812,838]" italics="true" pageId="14" pageNumber="15">Achnanthidium exiguum</emphasis>
|
||
(Grunow) Czarn.
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName id="4C4E80B7FFAE7C44A4606672FBA0AA08" authority="W. Sm. Water" authorityName="W. Sm. Water" box="[804,1094,812,839]" class="Bacillariophyceae" family="Achnanthidiaceae" genus="Achnanthidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="14" pageNumber="15" phylum="Ochrophyta" rank="species" species="lineare">
|
||
<emphasis id="B93A2726FFAE7C44A4606672FC7DAA09" box="[804,923,812,838]" italics="true" pageId="14" pageNumber="15">A. lineare</emphasis>
|
||
W.Sm. Water
|
||
</taxonomicName>
|
||
was warm (27.9°C) and alkaline with relatively high dissolved oxygen content (
|
||
<quantity id="4CB656D1FFAE7C44A42B660EFC20AA25" box="[879,966,848,874]" metricMagnitude="-6" metricUnit="kg" metricValue="8.7" pageId="14" pageNumber="15" unit="mg" value="8.7">8.7 mg</quantity>
|
||
/L). Conductivity was 643 µS/cm. Water analyses determined Ca
|
||
<superScript id="7C3B567CFFAE7C44A560662DFDD0AACE" attach="left" box="[548,566,883,897]" fontSize="6" pageId="14" pageNumber="15">2+</superScript>
|
||
(
|
||
<quantity id="4CB656D1FFAE7C44A503662DFD4FAAC1" box="[583,681,883,910]" metricMagnitude="-5" metricUnit="kg" metricValue="6.83" pageId="14" pageNumber="15" unit="mg" value="68.3">68.3 mg</quantity>
|
||
/L) and Mg
|
||
<superScript id="7C3B567CFFAE7C44A472662DFCAFAACE" attach="left" box="[822,841,883,897]" fontSize="6" pageId="14" pageNumber="15">2+</superScript>
|
||
(
|
||
<quantity id="4CB656D1FFAE7C44A41E662DFC40AAC1" box="[858,934,883,910]" metricMagnitude="-5" metricUnit="kg" metricValue="2.3" pageId="14" pageNumber="15" unit="mg" value="23.0">23 mg</quantity>
|
||
/L) as the dominant cations and HCO
|
||
<subScript id="17CAF971FFAE7C44A22C66D8FA97AADB" attach="left" box="[1384,1393,902,916]" fontSize="6" pageId="14" pageNumber="15">3</subScript>
|
||
<superScript id="7C3B567CFFAE7C44A235662DFA91AACE" attach="right" box="[1393,1399,883,897]" fontSize="6" pageId="14" pageNumber="15">-</superScript>
|
||
(
|
||
<quantity id="4CB656D1FFAE7C44A78166C9FED0AAFD" box="[197,310,919,946]" metricMagnitude="-4" metricUnit="kg" metricValue="2.927" pageId="14" pageNumber="15" unit="mg" value="292.7">292.7 mg</quantity>
|
||
/L) as important anion. Overall,
|
||
<taxonomicName id="4C4E80B7FFAE7C44A5F866C6FCD2AAFE" authority="Paillès & Sylvestre & Tonetto & Mazur & Conrod, 2020" authorityName="Paillès & Sylvestre & Tonetto & Mazur & Conrod" authorityYear="2020" box="[700,820,919,945]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Discostella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="14" pageNumber="15" phylum="Ochrophyta" rank="species" species="gabinii" status="sp. nov.">
|
||
<emphasis id="B93A2726FFAE7C44A5F866C6FCD2AAFE" box="[700,820,919,945]" italics="true" pageId="14" pageNumber="15">D. gabinii</emphasis>
|
||
</taxonomicName>
|
||
<taxonomicNameLabel id="A2099A5DFFAE7C44A47866C6FC7EAAFD" box="[828,920,920,946]" pageId="14" pageNumber="15" rank="species">sp. nov.</taxonomicNameLabel>
|
||
seems to tolerate varying conductivities but is most abundant in alkaline, low conductivities (600–650 µS/cm) and calcium-bicarbonated waters.
|
||
</paragraph>
|
||
<paragraph id="8BF1FB34FFAE7C44A7F966A2FD13ACA9" blockId="14.[188,1399,1020,1510]" pageId="14" pageNumber="15">
|
||
<emphasis id="B93A2726FFAE7C44A7F966A2FE26AD59" box="[189,448,1020,1046]" italics="true" pageId="14" pageNumber="15">
|
||
<taxonomicName id="4C4E80B7FFAE7C44A7F966A2FE5AAD59" authorityName="Sylvestre, Pailles & Escobar" authorityYear="2018" box="[189,444,1020,1046]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Cyclotella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="14" pageNumber="15" phylum="Ochrophyta" rank="species" species="petenensis">Cyclotella petenensis</taxonomicName>
|
||
,
|
||
</emphasis>
|
||
although considered to be fossil at the time of description (
|
||
<bibRefCitation id="EFDF86C5FFAE7C44A3C866A2FA8CAD58" author="Pailles C. & Sylvestre F. & Escobar J. & Tonetto A. & Rustig S. & Mazur J. C." box="[1164,1386,1020,1047]" pageId="14" pageNumber="15" pagination="247 - 263" refId="ref11919" refString="Pailles C., Sylvestre F., Escobar J., Tonetto A., Rustig S. & Mazur J. C. 2018. Cyclotella petenensis and Cyclotella cassandrae, two new fossil diatoms from Pleistocene sediments of Lake Peten-Itza, Guatemala, Central America. Phytotaxa 351 (4): 247 - 263. https: // doi. org / 10.11646 / phytotaxa. 351.4.1" type="journal article" year="2018">
|
||
Paillès
|
||
<emphasis id="B93A2726FFAE7C44A3A366A3FAC4AD59" box="[1255,1314,1020,1046]" italics="true" pageId="14" pageNumber="15">et al.</emphasis>
|
||
2018
|
||
</bibRefCitation>
|
||
), was identified as
|
||
<taxonomicName id="4C4E80B7FFAE7C44A6C2617EFD59AD75" authority="(CYMG)" baseAuthorityName="CYMG" box="[390,703,1056,1082]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Cyclotella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="14" pageNumber="15" phylum="Ochrophyta" rank="species" species="meneghiniana">
|
||
<emphasis id="B93A2726FFAE7C44A6C2617EFDABAD75" box="[390,589,1056,1082]" italics="true" pageId="14" pageNumber="15">C. meneghiniana</emphasis>
|
||
(CYMG)
|
||
</taxonomicName>
|
||
in the modern dataset mainly due to the fact that specimens were small in size, tangentially undulated with <5 valve face fultoportulae on the raised part. Once diagnosed as a new species in the sedimentary record, a re-examination of modern samples revealed that
|
||
<taxonomicName id="4C4E80B7FFAE7C44A7B161D5FE75ADEA" authorityName="Sylvestre, Pailles & Escobar" authorityYear="2018" box="[245,403,1163,1189]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Cyclotella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="14" pageNumber="18" phylum="Ochrophyta" rank="species" species="petenensis">
|
||
C.
|
||
<emphasis id="B93A2726FFAE7C44A65D61D2FE75ADEA" box="[281,403,1164,1189]" italics="true" pageId="14" pageNumber="15">petenensis</emphasis>
|
||
</taxonomicName>
|
||
was present in low percentages (<4%) in five water bodies. Only in Lake Yalahau (
|
||
<collectingRegion id="498A35D6FFAE7C44A78161F1FEC0AD86" box="[197,294,1199,1225]" country="Mexico" name="Yucatan" pageId="14" pageNumber="15">Yucatan</collectingRegion>
|
||
lowlands),
|
||
<taxonomicName id="4C4E80B7FFAE7C44A6F361F1FDBEAD87" authorityName="Sylvestre, Pailles & Escobar" authorityYear="2018" box="[439,600,1199,1225]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Cyclotella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="14" pageNumber="15" phylum="Ochrophyta" rank="species" species="petenensis">
|
||
<emphasis id="B93A2726FFAE7C44A6F361F1FDBEAD87" box="[439,600,1199,1225]" italics="true" pageId="14" pageNumber="15">C. petenensis</emphasis>
|
||
</taxonomicName>
|
||
reached 17.8% (
|
||
<tableCitation id="C6CCCE8FFFAE7C44A46D61F0FC60AD86" box="[809,902,1198,1225]" captionStart="Table 1" captionStartId="15.[189,258,265,291]" captionTargetBox="[193,1395,437,1877]" captionTargetId="graphics-11@15.[189,1398,428,1887]" captionTargetPageId="15" captionText="Table 1 (continued on the next page). Selected limnological and chemical data from lakes (single measurements in 2005 or 2008) containingDiscostella gabinii Paillès & Sylvestre sp. nov. and Cyclotella petenensis Sylvestre, Paillès & Escobar in the Yucatan Peninsula after Pérez et al. (2013). n.d. = not determined." httpUri="http://table.plazi.org/id/DF31ABBCFFAF7C45A7F96457FEADA8C3" pageId="14" pageNumber="15" tableUuid="DF31ABBCFFAF7C45A7F96457FEADA8C3">Table 1</tableCitation>
|
||
). Of all water bodies investigated, Lake Yalahau had the highest diatom species richness. In this lake, water is shallow, warm (28.8°C) and alkaline (pH 8.9) with a high dissolved oxygen content (
|
||
<quantity id="4CB656D1FFAE7C44A40961A8FC78AC5F" box="[845,926,1270,1296]" metricMagnitude="-6" metricUnit="kg" metricValue="8.7" pageId="14" pageNumber="15" unit="mg" value="8.7">8.7 mg</quantity>
|
||
/L). Electrical conductivity is high 2350 µS/cm. Water was magnesium (
|
||
<quantity id="4CB656D1FFAE7C44A5716047FD43AC7B" box="[565,677,1305,1332]" metricMagnitude="-4" metricUnit="kg" metricValue="1.368" pageId="14" pageNumber="15" unit="mg" value="136.8">136.8 mg</quantity>
|
||
/L) and bicarbonate (
|
||
<quantity id="4CB656D1FFAE7C44A4DB6044FBE9AC7B" box="[927,1039,1306,1332]" metricMagnitude="-4" metricUnit="kg" metricValue="7.074" pageId="14" pageNumber="15" unit="mg" value="707.4">707.4 mg</quantity>
|
||
/L) rich. Its diatom population was composed of 33% of
|
||
<taxonomicName id="4C4E80B7FFAE7C44A6BC6063FD24AC18" box="[504,706,1341,1367]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Cyclotella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="14" pageNumber="15" phylum="Ochrophyta" rank="species" species="meneghiniana">
|
||
<emphasis id="B93A2726FFAE7C44A6BC6063FD24AC18" box="[504,706,1341,1367]" italics="true" pageId="14" pageNumber="15">C. meneghiniana</emphasis>
|
||
</taxonomicName>
|
||
accompanied by
|
||
<taxonomicName id="4C4E80B7FFAE7C44A4DD6063FEA8AC34" authority="Lange-Bert. & Gerd Moser" authorityName="Lange-Bert. & Gerd Moser" class="Bacillariophyceae" family="Brachysiraceae" genus="Brachysira" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="14" pageNumber="15" phylum="Ochrophyta" rank="species" species="australofollis">
|
||
<emphasis id="B93A2726FFAE7C44A4DD6063FB27AC18" box="[921,1217,1341,1367]" italics="true" pageId="14" pageNumber="15">Brachysira australofollis</emphasis>
|
||
Lange-Bert. & Gerd Moser
|
||
</taxonomicName>
|
||
,
|
||
<taxonomicName id="4C4E80B7FFAE7C44A613603FFD91AC34" authority="Lange-Bert." authorityName="Lange-Bert." box="[343,631,1377,1403]" class="Bacillariophyceae" family="Brachysiraceae" genus="Brachysira" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="14" pageNumber="15" phylum="Ochrophyta" rank="species" species="neoexilis">
|
||
<emphasis id="B93A2726FFAE7C44A613603FFE39AC34" box="[343,479,1377,1403]" italics="true" pageId="14" pageNumber="15">B. neoexilis</emphasis>
|
||
Lange-Bert.
|
||
</taxonomicName>
|
||
,
|
||
<taxonomicName id="4C4E80B7FFAE7C44A5C6603FFB24AC34" authority="Novelo, Tavera & Ibarra" authorityName="Novelo, Tavera & Ibarra" box="[642,1218,1377,1403]" class="Bacillariophyceae" family="Cymbellaceae" genus="Encyonema" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="14" pageNumber="15" phylum="Ochrophyta" rank="species" species="densistriata">
|
||
<emphasis id="B93A2726FFAE7C44A5C6603FFC7BAC34" box="[642,925,1377,1403]" italics="true" pageId="14" pageNumber="15">Encyonema densistriata</emphasis>
|
||
Novelo, Tavera & Ibarra
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName id="4C4E80B7FFAE7C44A3BE603FFDD5ACD0" authority="(Kutz.) Lange-Bert. In" authorityName="Lange-Bert. In" baseAuthorityName="Kutz." class="Bacillariophyceae" family="Fragilariaceae" genus="Fragilaria" higherTaxonomySource="GBIF" kingdom="Chromista" order="Fragilariales" pageId="14" pageNumber="15" phylum="Ochrophyta" rank="species" species="famelica">
|
||
<emphasis id="B93A2726FFAE7C44A3BE603FFEC4ACD1" italics="true" pageId="14" pageNumber="15">Fragilaria famelica</emphasis>
|
||
(Kütz.) Lange-Bert. In
|
||
</taxonomicName>
|
||
coastal Lake
|
||
<collectingRegion id="498A35D6FFAE7C44A59C60DBFCA6ACD0" box="[728,832,1413,1439]" country="Guatemala" name="El Progreso" pageId="14" pageNumber="15">Progreso</collectingRegion>
|
||
where
|
||
<taxonomicName id="4C4E80B7FFAE7C44A4DE60DBFBD1ACD1" authorityName="Sylvestre, Pailles & Escobar" authorityYear="2018" box="[922,1079,1413,1439]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Cyclotella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="14" pageNumber="15" phylum="Ochrophyta" rank="species" species="petenensis">
|
||
<emphasis id="B93A2726FFAE7C44A4DE60DBFBD1ACD1" box="[922,1079,1413,1439]" italics="true" pageId="14" pageNumber="15">C. petenensis</emphasis>
|
||
</taxonomicName>
|
||
represents 4% of the flora, water conductivity was 2040 µS/cm. In the modern samples, it appears that
|
||
<taxonomicName id="4C4E80B7FFAE7C44A36960F6FB2EAC8D" authorityName="Sylvestre, Pailles & Escobar" authorityYear="2018" box="[1069,1224,1448,1474]" class="Bacillariophyceae" family="Stephanodiscaceae" genus="Cyclotella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="14" pageNumber="15" phylum="Ochrophyta" rank="species" species="petenensis">
|
||
<emphasis id="B93A2726FFAE7C44A36960F6FB2EAC8D" box="[1069,1224,1448,1474]" italics="true" pageId="14" pageNumber="15">C. petenensis</emphasis>
|
||
</taxonomicName>
|
||
seems to favor waters with conductivities close to 2000 µS/cm.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |