277 lines
47 KiB
XML
277 lines
47 KiB
XML
<document id="050A8C361B03C6B7619097878DD954AB" ID-CLB-Dataset="5288" ID-DOI="10.11646/phytotaxa.161.2.5" ID-GBIF-Dataset="7693761b-af9e-46dd-a914-704668534e94" ID-ISSN="1179-3163" ID-Zenodo-Dep="5128987" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1627052398483" checkinUser="felipe" docAuthor="Fofana, Cheikh Abdoul Kader, Sow, El Hadji, Taylor, Jonathan, Ector, Luc & Vijver, Bart Van De" docDate="2014" docId="D544BD3B8B15FFEAFF023CD0FB2D5636" docLanguage="en" docName="Phytotaxa.161.2.139-147.pdf" docOrigin="Phytotaxa 161 (2)" docSource="http://dx.doi.org/10.11646/phytotaxa.161.2.5" docStyle="DocumentStyle:13F189B31CB4CCCE9197361A4E100104.3:Phytotaxa.2011-2013.journal_article" docStyleId="13F189B31CB4CCCE9197361A4E100104" docStyleName="Phytotaxa.2011-2013.journal_article" docStyleVersion="3" docTitle="Placoneis cocquytiae Fofana & Sow & Taylor & Ector & Vijver 2014, sp. nov." docType="treatment" docVersion="5" lastPageNumber="143" masterDocId="297DC5438B14FFEEFF95393FFFBD540B" masterDocTitle="Placoneis cocquytiae, a new raphid diatom (Bacillariophyceae) from the Senegal River (Senegal, West Africa)" masterLastPageNumber="147" masterPageNumber="139" pageNumber="140" updateTime="1699037116910" updateUser="ExternalLinkService" zenodo-license-document="CLOSED">
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<mods:title id="E3EA0B591054F8C6B8DE0E03BD4F31C6">Placoneis cocquytiae, a new raphid diatom (Bacillariophyceae) from the Senegal River (Senegal, West Africa)</mods:title>
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<mods:name id="EC71A75DAEED363E0C36781ECC9BF4B6" type="personal">
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<mods:namePart id="56EC3BA7F7439AF3841EF8841D3FAB07">Fofana, Cheikh Abdoul Kader</mods:namePart>
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<mods:affiliation id="3C4A0D41A1787E9649447922D2811163">Université Cheikh Anta Diop, Département de Géologie, Faculté des Sciences et Techniques, Dakar, Senegal</mods:affiliation>
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<mods:roleTerm id="A0E9355319569C0EF9C168D212D634EB">Author</mods:roleTerm>
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<mods:namePart id="D30C6A69309D064F474564B07C2368C9">Sow, El Hadji</mods:namePart>
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<mods:affiliation id="C54814D3DEA4354F55375BBD7D1B20D1">Université Cheikh Anta Diop, Département de Géologie, Faculté des Sciences et Techniques, Dakar, Senegal</mods:affiliation>
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<mods:name id="95D2A379713C2F20F2A2ADB693D5ACAD" type="personal">
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<mods:roleTerm id="E6BBB8CA89E3EFC87338CC9D295C307F">Author</mods:roleTerm>
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<mods:namePart id="7CA7CE6B4C688C44C771A8B12200D311">Taylor, Jonathan</mods:namePart>
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<mods:affiliation id="B37C3B575B4968C93C7D77C61FE5B94D">Botanic Garden Meise, Department of Bryophyta & Thallophyta, Nieuwelaan 38, B- 1860 Meise, Belgium & Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa & South African Institute for Aquatic Biodiversity, Grahamstown, South Africa</mods:affiliation>
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</mods:role>
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<mods:namePart id="29197CC389352112CC4B1BD577896485">Ector, Luc</mods:namePart>
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<mods:affiliation id="BF1884D904D5D91569084FAE2612F6EE">Public Research Centre - Gabriel Lippmann, Department of Environment and Agro-biotechnologies (EVA), 41 rue du Brill, L- 4422 Belvaux, Luxembourg</mods:affiliation>
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<mods:namePart id="A160701C8729F848EF91F16A9D366F3A">Vijver, Bart Van De</mods:namePart>
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<mods:affiliation id="1B58B8D090EC2520DADB0D3CE000F0A9">Botanic Garden Meise, Department of Bryophyta & Thallophyta, Nieuwelaan 38, B- 1860 Meise, Belgium</mods:affiliation>
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<mods:typeOfResource id="2DA9CB54CFFA30690382F3B177744EB4">text</mods:typeOfResource>
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<mods:title id="678C50F936CE469EEEB8A5A80FF8E981">Phytotaxa</mods:title>
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<mods:part id="5A977677C3D05D317C1D99BD73AD2126">
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<mods:date id="B580FE68467DACC7930BADACBC5FEF92">2014</mods:date>
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<mods:number id="27A938299F8191D6DD8D57D00E57AF22">2014-02-24</mods:number>
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<mods:number id="2F601CDFAE1B23CAAFBFA72B9F2BE7B4">161</mods:number>
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<mods:number id="5994D532CFBB41571CAD588C04868EF9">2</mods:number>
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<mods:start id="6C0AF65DABDB72CC7B9FE5DB684BE972">139</mods:start>
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<mods:url id="E2861869B719C082D86E5095CBBC8B31">http://dx.doi.org/10.11646/phytotaxa.161.2.5</mods:url>
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<mods:classification id="B73E64E1EBB740F2FFB75BC85A68024F">journal article</mods:classification>
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<mods:identifier id="20DFA9516453CA8E046962310B592D36" type="ISSN">1179-3163</mods:identifier>
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<mods:identifier id="42D37F6E67E2CF2C7848FEB02F379DCC" type="Zenodo-Dep">5128987</mods:identifier>
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<treatment id="D544BD3B8B15FFEAFF023CD0FB2D5636" ID-DOI="http://doi.org/10.5281/zenodo.5129037" ID-GBIF-Taxon="183731179" ID-Zenodo-Dep="5129037" LSID="urn:lsid:plazi:treatment:D544BD3B8B15FFEAFF023CD0FB2D5636" httpUri="http://treatment.plazi.org/id/D544BD3B8B15FFEAFF023CD0FB2D5636" lastPageId="4" lastPageNumber="143" pageId="1" pageNumber="140">
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<subSubSection id="15F75FA68B15FFEFFF023CD0FD395202" box="[151,644,1519,1545]" pageId="1" pageNumber="140" type="nomenclature">
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<paragraph id="5D520C2D8B15FFEFFF023CD0FD395202" blockId="1.[151,644,1519,1545]" box="[151,644,1519,1545]" pageId="1" pageNumber="140">
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<heading id="061ABB418B15FFEFFF023CD0FD395202" box="[151,644,1519,1545]" fontSize="11" level="2" pageId="1" pageNumber="140" reason="3">
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<taxonomicName id="9AED77AE8B15FFEFFF023CD0FE2E5202" authority="Fofana & Sow & Taylor & Ector & Vijver, 2014" authorityName="Fofana & Sow & Taylor & Ector & Vijver" authorityYear="2014" box="[151,403,1519,1545]" class="Bacillariophyceae" family="Cymbellaceae" genus="Placoneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="1" pageNumber="140" phylum="Bacillariophyta" rank="species" species="cocquytiae" status="sp. nov.">
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<emphasis id="6F99D03F8B15FFEFFF023CD0FE2E5202" bold="true" box="[151,403,1519,1545]" italics="true" pageId="1" pageNumber="140">Placoneis cocquytiae</emphasis>
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</taxonomicName>
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<taxonomicNameLabel id="74AA6D448B15FFEFFE0E3CD0FE4B5202" box="[411,502,1519,1545]" pageId="1" pageNumber="140" rank="species">sp. nov.</taxonomicNameLabel>
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(
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<figureCitation id="C5D610A88B15FFEFFD903CD0FDC65202" box="[517,635,1519,1545]" captionStart="FIGURES 1–10" captionStartId="2.[151,258,1228,1249]" captionTargetBox="[154,1436,151,1207]" captionTargetId="figure-352@2.[154,1437,151,1207]" captionTargetPageId="2" captionText="FIGURES 1–10. LM: Placoneis cocquytiae, images to depict variation; all from the type population in Kidira, Senegal. Scale bar = 10 µm." figureDoi="http://doi.org/10.5281/zenodo.5128989" httpUri="https://zenodo.org/record/5128989/files/figure.png" pageId="1" pageNumber="140">Figs 1–10</figureCitation>
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)
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</heading>
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</paragraph>
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</subSubSection>
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<subSubSection id="15F75FA68B15FFEFFF023F2CFB2752F4" pageId="1" pageNumber="140" type="materials_examined">
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<paragraph id="5D520C2D8B15FFEFFF023F2CFC9D524C" blockId="1.[151,1436,1555,1791]" pageId="1" pageNumber="140">
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<emphasis id="6F99D03F8B15FFEFFF023F2CFF715222" bold="true" box="[151,204,1555,1577]" pageId="1" pageNumber="140">Type</emphasis>
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:—
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<materialsCitation id="ED8506708B15FFEFFF7F3F2CFCA1524C" ID-GBIF-Occurrence="3326721301" collectingDate="2007-03-06" collectionCode="BR, PLP" collectorName="Kidira & B. Van de Vijver" country="Senegal" location="Van de Vijver" municipality="University of Antwerp" pageId="1" pageNumber="140" specimenCount="1" typeStatus="holotype">
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<collectingCountry id="25FA4CBD8B15FFEFFF7F3F2CFEDE5222" box="[234,355,1555,1577]" name="Senegal" pageId="1" pageNumber="140">SENEGAL</collectingCountry>
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.
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<collectorName id="F01869FB8B15FFEFFEE43F2CFE095222" box="[369,436,1555,1577]" pageId="1" pageNumber="140">Kidira</collectorName>
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, sample SEN–4, leg.
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<collectorName id="F01869FB8B15FFEFFD363F2CFCE35222" box="[675,862,1555,1577]" pageId="1" pageNumber="140">
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B.
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<location id="58325AF68B15FFEFFD533F2CFCE35222" LSID="urn:lsid:plazi:treatment:D544BD3B8B15FFEAFF023CD0FB2D5636:58325AF68B15FFEFFD533F2CFCE35222" box="[710,862,1555,1577]" country="Senegal" municipality="University of Antwerp" name="Van de Vijver" pageId="1" pageNumber="140">Van de Vijver</location>
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</collectorName>
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||
, coll. date
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<date id="29532AED8B15FFEFFC4E3F2CFBF35222" box="[987,1102,1555,1577]" pageId="1" pageNumber="140" value="2007-03-06">
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||
<collectingDate id="3917D3058B15FFEFFC4E3F2CFBF35222" box="[987,1102,1555,1577]" pageId="1" pageNumber="140" value="2007-03-06">06/03/2007</collectingDate>
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</date>
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||
(
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<typeStatus id="8256B28F8B15FFEFFBF43F2CFB035222" box="[1121,1214,1555,1577]" pageId="1" pageNumber="140" type="holotype">holotype</typeStatus>
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, slide no.
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<collectionCode id="3BFC94E88B15FFEFFAA63F2CFAE85222" box="[1331,1365,1555,1577]" country="Brazil" name="Embrapa Agrobiology Diazothrophic Microbial Culture Collection" pageId="1" pageNumber="140">BR</collectionCode>
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–4356; isotypes, slide
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<collectionCode id="3BFC94E88B15FFEFFEC93F0EFE34524C" box="[348,393,1585,1607]" country="India" httpUri="http://biocol.org/urn:lsid:biocol.org:col:15781" lsid="urn:lsid:biocol.org:col:15781" name="Institute of Himalayan Bioresource Technology" pageId="1" pageNumber="140" type="Herbarium">PLP</collectionCode>
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–250,
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<collectingMunicipality id="BD3696578B15FFEFFE523F0EFD12524C" box="[455,687,1585,1607]" pageId="1" pageNumber="140">University of Antwerp</collectingMunicipality>
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, Belgium)
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</materialsCitation>
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.
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</paragraph>
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<paragraph id="5D520C2D8B15FFEFFF023F6FFB2752F4" blockId="1.[151,1436,1555,1791]" pageId="1" pageNumber="140">
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Valves broadly lanceolate with clearly convex, never parallel, margins and broadly protracted, bluntly rounded, rostrate apices. Valve dimensions (n=20): length
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<quantity id="9A15A1C88B15FFEFFD8E3F50FD3A528F" box="[539,647,1647,1669]" metricMagnitude="-2" metricUnit="m" metricValue="4.65" metricValueMax="5.8" metricValueMin="3.5" pageId="1" pageNumber="140" unit="mm" value="46.5" valueMax="58.0" valueMin="35.0">35–58 µm</quantity>
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, width 17.0–
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<quantity id="9A15A1C88B15FFEFFC9F3F50FCDE528F" box="[778,867,1647,1669]" metricMagnitude="-2" metricUnit="m" metricValue="2.06" pageId="1" pageNumber="140" unit="mm" value="20.6">20.6 µm</quantity>
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. Axial area narrow, linear but slightly curved following the curved raphe branches, gradually but only slightly widening towards the central area. Central area variable in shape due to several irregularly shortened striae, usually transapically enlarged. Isolated pore absent. Raphe branches curved terminating in straight, weakly expanded proximal endings. Distal raphe fissures unilaterally deflected at the apices. Striae clearly radiate throughout the valve,
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<quantity id="9A15A1C88B15FFEFFDAE3FD6FD3A52F4" box="[571,647,1769,1791]" metricMagnitude="-1" metricUnit="m" metricValue="2.54" metricValueMax="2.794" metricValueMin="2.286" pageId="1" pageNumber="140" unit="in" value="10.0" valueMax="11.0" valueMin="9.0">9–11 in</quantity>
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<quantity id="9A15A1C88B15FFEFFD183FD6FD6F52F4" box="[653,722,1769,1791]" metricMagnitude="-2" metricUnit="m" metricValue="1.0" pageId="1" pageNumber="140" unit="mm" value="10.0">10 µm</quantity>
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. Areolae discernible in LM, ca.
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<quantity id="9A15A1C88B15FFEFFB823FD6FBF652F4" box="[1047,1099,1769,1791]" metricMagnitude="-1" metricUnit="m" metricValue="8.89" pageId="1" pageNumber="140" unit="in" value="35.0">35 in</quantity>
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||
<quantity id="9A15A1C88B15FFEFFBC43FD6FB2B52F4" box="[1105,1174,1769,1791]" metricMagnitude="-2" metricUnit="m" metricValue="1.0" pageId="1" pageNumber="140" unit="mm" value="10.0">10 µm</quantity>
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||
.
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||
</paragraph>
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||
</subSubSection>
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||
<subSubSection id="15F75FA68B15FFECFF023E1BFC9E5217" lastPageId="2" lastPageNumber="141" pageId="1" pageNumber="140" type="biology_ecology">
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||
<paragraph id="5D520C2D8B15FFEFFF023E1BFAC153F9" blockId="1.[151,1436,1828,2036]" pageId="1" pageNumber="140">
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||
<emphasis id="6F99D03F8B15FFEFFF023E1BFE7E5336" bold="true" box="[151,451,1828,1853]" pageId="1" pageNumber="140">Ecology and Distribution</emphasis>
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||
:—
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||
<taxonomicName id="9AED77AE8B15FFEFFE723E1BFD685337" authorityName="Fofana & Sow & Taylor & Ector & Vijver" authorityYear="2014" box="[487,725,1828,1853]" class="Bacillariophyceae" family="Cymbellaceae" genus="Placoneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="1" pageNumber="140" phylum="Bacillariophyta" rank="species" species="cocquytiae">
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||
<emphasis id="6F99D03F8B15FFEFFE723E1BFD685337" box="[487,725,1828,1853]" italics="true" pageId="1" pageNumber="140">Placoneis cocquytiae</emphasis>
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||
</taxonomicName>
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||
has so far been found only in small quantities in a sample from the
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<collectingCountry id="25FA4CBD8B15FFEFFF553E78FEA4536B" box="[192,281,1863,1888]" name="Senegal" pageId="1" pageNumber="140">Senegal</collectingCountry>
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||
survey collected near Kidira. Single valves have also been observed in samples collected near Ndioum and Ngouy-Doué. In
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<collectingCountry id="25FA4CBD8B15FFEFFE193E54FE54538F" box="[396,489,1899,1924]" name="Senegal" pageId="1" pageNumber="140">Senegal</collectingCountry>
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,
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<taxonomicName id="9AED77AE8B15FFEFFE603E53FD305388" authorityName="Fofana & Sow & Taylor & Ector & Vijver" authorityYear="2014" box="[501,653,1900,1923]" class="Bacillariophyceae" family="Cymbellaceae" genus="Placoneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="1" pageNumber="140" phylum="Bacillariophyta" rank="species" species="cocquytiae">
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||
<emphasis id="6F99D03F8B15FFEFFE603E53FD305388" box="[501,653,1900,1923]" italics="true" pageId="1" pageNumber="140">P. cocquytiae</emphasis>
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</taxonomicName>
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was found in a small pool next to the main river bed that is used as drinking pool for cattle and sheep. The pool had a pH of 7.5 and a specific conductance value of almost 100 µS/cm. Nutrient values, sulphate and chloride were low to moderate (NO
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||
<subScript id="C1690E688B15FFEFFC193EFBFC2953D9" attach="left" box="[908,916,1988,2002]" fontSize="6" pageId="1" pageNumber="140">3</subScript>
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<superScript id="AA98A1658B15FFEFFC013E8EFC2453B4" attach="right" box="[916,921,1969,1983]" fontSize="6" pageId="1" pageNumber="140">-</superScript>
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||
=
|
||
<quantity id="9A15A1C88B15FFEFFC2C3E8BFBB653C6" box="[953,1035,1972,1997]" metricMagnitude="-6" metricUnit="kg" metricValue="1.2" pageId="1" pageNumber="140" unit="mg" value="1.2">1.2 mg</quantity>
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||
/l, SO
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<subScript id="C1690E688B15FFEFFBD83EFBFBE853D9" attach="left" box="[1101,1109,1988,2002]" fontSize="6" pageId="1" pageNumber="140">4</subScript>
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<superScript id="AA98A1658B15FFEFFBC03E8EFBE753B4" attach="left" box="[1109,1114,1969,1983]" fontSize="6" pageId="1" pageNumber="140">-</superScript>
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=
|
||
<quantity id="9A15A1C88B15FFEFFBEE3E8BFB7053C6" box="[1147,1229,1972,1997]" metricMagnitude="-6" metricUnit="kg" metricValue="9.8" pageId="1" pageNumber="140" unit="mg" value="9.8">9.8 mg</quantity>
|
||
/l, Cl
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||
<superScript id="AA98A1658B15FFEFFA903E8EFAB753B4" attach="left" box="[1285,1290,1969,1983]" fontSize="6" pageId="1" pageNumber="140">-</superScript>
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=
|
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<quantity id="9A15A1C88B15FFEFFABE3E8BFAC253C6" box="[1323,1407,1972,1997]" metricMagnitude="-6" metricUnit="kg" metricValue="4.1" pageId="1" pageNumber="140" unit="mg" value="4.1">4.1 mg</quantity>
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/l). Dominating taxa in the sample include
|
||
<taxonomicName id="9AED77AE8B15FFEFFDDA3EE4FBA853FF" authority="Grunow (1862: 574)" authorityName="Grunow" authorityPageNumber="574" authorityYear="1862" box="[591,1045,2011,2036]" class="Monogenea" family="Capsalidae" genus="Nitzschia" kingdom="Animalia" order="Capsalidea" pageId="1" pageNumber="140" phylum="Platyhelminthes" rank="species" species="amphibia">
|
||
<emphasis id="6F99D03F8B15FFEFFDDA3EE4FC9553FF" box="[591,808,2011,2036]" italics="true" pageId="1" pageNumber="140">Nitzschia amphibia</emphasis>
|
||
<bibRefCitation id="397C71DC8B15FFEFFCBA3EE4FBA853FF" author="Grunow, A." box="[815,1045,2011,2036]" pageId="1" pageNumber="140" pagination="545 - 588" refId="ref5321" refString="Grunow, A. (1862) Die osterreichischen Diatomaceen nebst Anschluss einiger neuen Arten von andern Lokalitaten und einer kritischen Uebersicht der bisher bekannten Gattungen und Arten. Erste Folge. Epithemieae, Meridioneae, Diatomeae, Entopyleae, Surirelleae, Amphipleureae. Zweite Folge. Familie Nitzschieae. Verhandlungen der Kaiserlich-Koniglichen Zoologisch-Botanischen Gesellschaft in Wien 12: 545 - 588." type="journal article" year="1862">Grunow (1862: 574)</bibRefCitation>
|
||
</taxonomicName>
|
||
and several
|
||
<emphasis id="6F99D03F8B15FFEFFB373EE4FA8253FF" box="[1186,1343,2011,2036]" italics="true" pageId="1" pageNumber="140">Gomphonema</emphasis>
|
||
taxa.
|
||
</paragraph>
|
||
<caption id="09925CA58B16FFECFF023DF3FF0050F4" ID-DOI="http://doi.org/10.5281/zenodo.5128989" ID-Zenodo-Dep="5128989" httpUri="https://zenodo.org/record/5128989/files/figure.png" pageId="2" pageNumber="141" startId="2.[151,258,1228,1249]" targetBox="[154,1436,151,1207]" targetPageId="2">
|
||
<paragraph id="5D520C2D8B16FFECFF023DF3FF0050F4" blockId="2.[150,1436,1228,1279]" pageId="2" pageNumber="141">
|
||
<emphasis id="6F99D03F8B16FFECFF023DF3FE8050EA" bold="true" box="[151,317,1228,1249]" pageId="2" pageNumber="141">FIGURES 1–10.</emphasis>
|
||
LM:
|
||
<taxonomicName id="9AED77AE8B16FFECFEE73DF3FD8350EA" authorityName="Fofana & Sow & Taylor & Ector & Vijver" authorityYear="2014" box="[370,574,1228,1249]" class="Bacillariophyceae" family="Cymbellaceae" genus="Placoneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="2" pageNumber="141" phylum="Bacillariophyta" rank="species" species="cocquytiae">
|
||
<emphasis id="6F99D03F8B16FFECFEE73DF3FD8350EA" box="[370,574,1228,1249]" italics="true" pageId="2" pageNumber="141">Placoneis cocquytiae</emphasis>
|
||
</taxonomicName>
|
||
, images to depict variation; all from the type population in Kidira, Senegal. Scale bar = 10 µm.
|
||
</paragraph>
|
||
</caption>
|
||
<paragraph id="5D520C2D8B16FFECFF533C14FBE551BB" blockId="2.[151,1436,1323,1996]" pageId="2" pageNumber="141">
|
||
Remarkably,
|
||
<taxonomicName id="9AED77AE8B16FFECFECB3C13FE485148" authorityName="Fofana & Sow & Taylor & Ector & Vijver" authorityYear="2014" box="[350,501,1324,1347]" class="Bacillariophyceae" family="Cymbellaceae" genus="Placoneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="2" pageNumber="141" phylum="Bacillariophyta" rank="species" species="cocquytiae">
|
||
<emphasis id="6F99D03F8B16FFECFECB3C13FE485148" box="[350,501,1324,1347]" italics="true" pageId="2" pageNumber="141">P. cocquytiae</emphasis>
|
||
</taxonomicName>
|
||
was also found at four localities in the southern part of
|
||
<collectingCountry id="25FA4CBD8B16FFECFB103C14FB63514F" box="[1157,1246,1323,1348]" name="Zambia" pageId="2" pageNumber="141">Zambia</collectingCountry>
|
||
; two sites in the Zambezi River (main channel) and at two sites in one of its tributaries, the Kabompo River. Both rivers had an alkaline pH (7.7–8.4). The samples from the Zambezi River had a very low specific conductance (<100 µS/cm) whereas the Kabompo River had a specific conductance between 300 and 400 µS/cm.
|
||
</paragraph>
|
||
<paragraph id="5D520C2D8B16FFECFF533C83FC9E5217" blockId="2.[151,1436,1323,1996]" pageId="2" pageNumber="141">
|
||
It is likely that the species has a larger distribution in Africa, but confusion with taxa such as
|
||
<taxonomicName id="9AED77AE8B16FFECFAB83C84FE4951F3" authority="(Ehrenb.) Mereschk." authorityName="Mereschk." baseAuthorityName="Ehrenb." class="Bacillariophyceae" family="Cymbellaceae" genus="Placoneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="2" pageNumber="141" phylum="Bacillariophyta" rank="species" species="gastrum">
|
||
<emphasis id="6F99D03F8B16FFECFAB83C84FF4A51FC" italics="true" pageId="2" pageNumber="141">Placoneis gastrum</emphasis>
|
||
(Ehrenb.) Mereschk.
|
||
</taxonomicName>
|
||
(1903: 13; basionym:
|
||
<taxonomicName id="9AED77AE8B16FFECFC963CE0FB6951F3" authority="Ehrenb. 1843: 421" authorityName="Ehrenb." authorityPageNumber="421" authorityYear="1843" box="[771,1236,1503,1528]" class="Bacillariophyceae" family="Pinnulariaceae" genus="Pinnularia" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="2" pageNumber="141" phylum="Bacillariophyta" rank="species" species="gastrum">
|
||
<emphasis id="6F99D03F8B16FFECFC963CE0FC5151FC" box="[771,1004,1503,1528]" italics="true" pageId="2" pageNumber="141">Pinnularia gastrum</emphasis>
|
||
Ehrenb. 1843: 421
|
||
</taxonomicName>
|
||
), obscures at the moment our actual knowledge of the species’ distribution.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="15F75FA68B16FFEAFF533F18FB2D5636" lastPageId="4" lastPageNumber="143" pageId="2" pageNumber="141" type="etymology">
|
||
<paragraph id="5D520C2D8B16FFECFF533F18FD17526F" blockId="2.[151,1436,1323,1996]" pageId="2" pageNumber="141">
|
||
<emphasis id="6F99D03F8B16FFECFF533F18FEFA524B" bold="true" box="[198,327,1575,1600]" pageId="2" pageNumber="141">Etymology</emphasis>
|
||
:—The species is named after our colleague, Dr. Christine Cocquyt (Botanic Garden Meise) in recognition of her research on African diatoms.
|
||
</paragraph>
|
||
<paragraph id="5D520C2D8B16FFECFF533F50FC2253C0" blockId="2.[151,1436,1323,1996]" pageId="2" pageNumber="141">
|
||
<emphasis id="6F99D03F8B16FFECFF533F50FED85283" bold="true" box="[198,357,1647,1672]" pageId="2" pageNumber="141">Observations</emphasis>
|
||
:—
|
||
<emphasis id="6F99D03F8B16FFECFE1C3F4FFDF55283" box="[393,584,1647,1672]" italics="true" pageId="2" pageNumber="141">
|
||
LM (
|
||
<figureCitation id="C5D610A88B16FFECFE543F4FFD855283" box="[449,568,1647,1672]" captionStart="FIGURES 1–10" captionStartId="2.[151,258,1228,1249]" captionTargetBox="[154,1436,151,1207]" captionTargetId="figure-352@2.[154,1437,151,1207]" captionTargetPageId="2" captionText="FIGURES 1–10. LM: Placoneis cocquytiae, images to depict variation; all from the type population in Kidira, Senegal. Scale bar = 10 µm." figureDoi="http://doi.org/10.5281/zenodo.5128989" httpUri="https://zenodo.org/record/5128989/files/figure.png" pageId="2" pageNumber="141">Figs 1–10</figureCitation>
|
||
):
|
||
</emphasis>
|
||
The valves are broadly lanceolate with clearly convex margins giving the species a somewhat elliptical valve outline. The apices are clearly protracted, bluntly rounded, rostrate, but never (sub-)capitate: dimensions are (n=20): length
|
||
<quantity id="9A15A1C88B16FFECFD3B3F88FC9A52DB" box="[686,807,1719,1744]" metricMagnitude="-2" metricUnit="m" metricValue="4.65" metricValueMax="5.8" metricValueMin="3.5" pageId="2" pageNumber="141" unit="mm" value="46.5" valueMax="58.0" valueMin="35.0">35–58 µm</quantity>
|
||
, width 17.0–
|
||
<quantity id="9A15A1C88B16FFECFC2A3F88FB9952DB" box="[959,1060,1719,1744]" metricMagnitude="-2" metricUnit="m" metricValue="2.06" pageId="2" pageNumber="141" unit="mm" value="20.6">20.6 µm</quantity>
|
||
, length/width ratio 2.4–2.8. The valve width range in specimens from the Zambian populations is larger than the
|
||
<typeStatus id="8256B28F8B16FFECFB833FE3FBF752FF" box="[1046,1098,1756,1780]" pageId="2" pageNumber="141">type</typeStatus>
|
||
:
|
||
<quantity id="9A15A1C88B16FFECFBC13FE4FB4952FF" box="[1108,1268,1755,1780]" metricMagnitude="-2" metricUnit="m" metricValue="1.9449999999999998" metricValueMax="2.32" metricValueMin="1.5699999999999998" pageId="2" pageNumber="141" unit="mm" value="19.45" valueMax="23.2" valueMin="15.7">15.7–23.2 µm</quantity>
|
||
. The axial area is narrow, about 1/10 of the total valve width; it is linear but clearly curved and follows the curved raphe branches. The central area is irregularly shaped and formed by alternating shortening of the central striae. The isolated pore is absent from the central area. The raphe branches are clearly curved. The proximal raphe endings are straight and weakly but distinctly expanded. The distal raphe fissures are unilaterally deflected. The striae are radiate throughout the entire valve and are sometimes weakly geniculate near the apices (
|
||
<figureCitation id="C5D610A88B16FFECFBA93EB0FB6A53A3" box="[1084,1239,1935,1960]" captionStart="FIGURES 1–10" captionStartId="2.[151,258,1228,1249]" captionTargetBox="[154,1436,151,1207]" captionTargetId="figure-352@2.[154,1437,151,1207]" captionTargetPageId="2" captionText="FIGURES 1–10. LM: Placoneis cocquytiae, images to depict variation; all from the type population in Kidira, Senegal. Scale bar = 10 µm." figureDoi="http://doi.org/10.5281/zenodo.5128989" httpUri="https://zenodo.org/record/5128989/files/figure.png" pageId="2" pageNumber="141">Figs 2, 5 & 9</figureCitation>
|
||
),
|
||
<quantity id="9A15A1C88B16FFECFB7B3EB0FAFE53A3" box="[1262,1347,1935,1960]" metricMagnitude="-1" metricUnit="m" metricValue="2.54" metricValueMax="2.794" metricValueMin="2.286" pageId="2" pageNumber="141" unit="in" value="10.0" valueMax="11.0" valueMin="9.0">9–11 in</quantity>
|
||
<quantity id="9A15A1C88B16FFECFADF3EB0FA2553A3" box="[1354,1432,1935,1960]" metricMagnitude="-2" metricUnit="m" metricValue="1.0" pageId="2" pageNumber="141" unit="mm" value="10.0">10 µm</quantity>
|
||
. The areolae are quite visible in LM, appearing as large, distant pores.
|
||
</paragraph>
|
||
<caption id="09925CA58B17FFEDFF023E2CFD9853E2" ID-DOI="http://doi.org/10.5281/zenodo.5128993" ID-Zenodo-Dep="5128993" httpUri="https://zenodo.org/record/5128993/files/figure.png" pageId="3" pageNumber="142" startId="3.[151,259,1811,1832]" targetBox="[152,1435,153,1784]" targetPageId="3">
|
||
<paragraph id="5D520C2D8B17FFEDFF023E2CFD9853E2" blockId="3.[151,1436,1811,2025]" pageId="3" pageNumber="142">
|
||
<emphasis id="6F99D03F8B17FFEDFF023E2CFEF65323" bold="true" box="[151,331,1811,1832]" pageId="3" pageNumber="142">FIGURES 11–17.</emphasis>
|
||
SEM:
|
||
<emphasis id="6F99D03F8B17FFEDFE073E2CFDD45323" box="[402,617,1811,1832]" italics="true" pageId="3" pageNumber="142">
|
||
<taxonomicName id="9AED77AE8B17FFEDFE073E2CFDD85323" authorityName="Fofana & Sow & Taylor & Ector & Vijver" authorityYear="2014" box="[402,613,1811,1832]" class="Bacillariophyceae" family="Cymbellaceae" genus="Placoneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="3" pageNumber="142" phylum="Bacillariophyta" rank="species" species="cocquytiae">Placoneis cocquytiae</taxonomicName>
|
||
,
|
||
</emphasis>
|
||
all images from type population, Kidira, Senegal. Fig. 11. External overview of an entire valve; arrows indicate presence of an undulation in raphe branches. Note also irregular final striae near apex. Fig. 12. External overview of an entire valve in oblique view showing the series of areolae on mantle and stepped mantle edge. Fig. 13. External detail of central area allowing a view of the proximal raphe pores. Fig. 14. External detail of valve apex showing mantle areolae, distal raphe ending and irregular last stria on valve face. Fig. 15. Internal overview of entire valve. Fig. 16. Internal detail of central area showing raised central part and short deflected proximal raphe endings; note volate occlusions. Fig. 17. Internal detail of valve apex with helictoglossa. Scale bars represent10 µm.
|
||
</paragraph>
|
||
</caption>
|
||
<paragraph id="5D520C2D8B10FFEAFF5339A7FB2D5636" blockId="4.[151,1436,151,573]" pageId="4" pageNumber="143">
|
||
<emphasis id="6F99D03F8B10FFEAFF5339A7FE2254BB" box="[198,415,151,176]" italics="true" pageId="4" pageNumber="143">
|
||
SEM (
|
||
<figureCitation id="C5D610A88B10FFEAFE9B39A7FE2C54BB" box="[270,401,151,176]" captionStart="FIGURES 11–17" captionStartId="3.[151,259,1811,1832]" captionTargetBox="[152,1435,153,1784]" captionTargetId="figure-156@3.[152,1435,153,1784]" captionTargetPageId="3" captionText="FIGURES 11–17. SEM: Placoneis cocquytiae, all images from type population, Kidira, Senegal. Fig. 11. External overview of an entire valve; arrows indicate presence of an undulation in raphe branches. Note also irregular final striae near apex. Fig. 12. External overview of an entire valve in oblique view showing the series of areolae on mantle and stepped mantle edge. Fig. 13. External detail of central area allowing a view of the proximal raphe pores. Fig. 14. External detail of valve apex showing mantle areolae, distal raphe ending and irregular last stria on valve face. Fig. 15. Internal overview of entire valve. Fig. 16. Internal detail of central area showing raised central part and short deflected proximal raphe endings; note volate occlusions. Fig. 17. Internal detail of valve apex with helictoglossa. Scale bars represent10 µm." figureDoi="http://doi.org/10.5281/zenodo.5128993" httpUri="https://zenodo.org/record/5128993/files/figure.png" pageId="4" pageNumber="143">Figs 11–17</figureCitation>
|
||
):
|
||
</emphasis>
|
||
The striae are uniseriate, composed of small, rounded areolae (
|
||
<figureCitation id="C5D610A88B10FFEAFBE139A8FB7A54BB" box="[1140,1223,151,176]" captionStart="FIGURES 11–17" captionStartId="3.[151,259,1811,1832]" captionTargetBox="[152,1435,153,1784]" captionTargetId="figure-156@3.[152,1435,153,1784]" captionTargetPageId="3" captionText="FIGURES 11–17. SEM: Placoneis cocquytiae, all images from type population, Kidira, Senegal. Fig. 11. External overview of an entire valve; arrows indicate presence of an undulation in raphe branches. Note also irregular final striae near apex. Fig. 12. External overview of an entire valve in oblique view showing the series of areolae on mantle and stepped mantle edge. Fig. 13. External detail of central area allowing a view of the proximal raphe pores. Fig. 14. External detail of valve apex showing mantle areolae, distal raphe ending and irregular last stria on valve face. Fig. 15. Internal overview of entire valve. Fig. 16. Internal detail of central area showing raised central part and short deflected proximal raphe endings; note volate occlusions. Fig. 17. Internal detail of valve apex with helictoglossa. Scale bars represent10 µm." figureDoi="http://doi.org/10.5281/zenodo.5128993" httpUri="https://zenodo.org/record/5128993/files/figure.png" pageId="4" pageNumber="143">Fig. 11</figureCitation>
|
||
),
|
||
<quantity id="9A15A1C88B10FFEAFB4B39A8FAFF54BB" box="[1246,1346,151,176]" metricMagnitude="-1" metricUnit="m" metricValue="8.89" metricValueMax="9.652" metricValueMin="8.128" pageId="4" pageNumber="143" unit="in" value="35.0" valueMax="38.0" valueMin="32.0">32–38 in</quantity>
|
||
<quantity id="9A15A1C88B10FFEAFADE39A8FA2554BB" box="[1355,1432,151,176]" metricMagnitude="-2" metricUnit="m" metricValue="1.0" pageId="4" pageNumber="143" unit="mm" value="10.0">10 µm</quantity>
|
||
. The valve mantle striae are composed of small series of 3–4 rounded areolae (
|
||
<figureCitation id="C5D610A88B10FFEAFC693983FBC054DE" box="[1020,1149,188,213]" captionStart="FIGURES 11–17" captionStartId="3.[151,259,1811,1832]" captionTargetBox="[152,1435,153,1784]" captionTargetId="figure-156@3.[152,1435,153,1784]" captionTargetPageId="3" captionText="FIGURES 11–17. SEM: Placoneis cocquytiae, all images from type population, Kidira, Senegal. Fig. 11. External overview of an entire valve; arrows indicate presence of an undulation in raphe branches. Note also irregular final striae near apex. Fig. 12. External overview of an entire valve in oblique view showing the series of areolae on mantle and stepped mantle edge. Fig. 13. External detail of central area allowing a view of the proximal raphe pores. Fig. 14. External detail of valve apex showing mantle areolae, distal raphe ending and irregular last stria on valve face. Fig. 15. Internal overview of entire valve. Fig. 16. Internal detail of central area showing raised central part and short deflected proximal raphe endings; note volate occlusions. Fig. 17. Internal detail of valve apex with helictoglossa. Scale bars represent10 µm." figureDoi="http://doi.org/10.5281/zenodo.5128993" httpUri="https://zenodo.org/record/5128993/files/figure.png" pageId="4" pageNumber="143">Figs 12, 14</figureCitation>
|
||
). Near the apices, there is visible an irregular doubling of the final striae (
|
||
<figureCitation id="C5D610A88B10FFEAFD3339E0FC9B54F3" box="[678,806,223,248]" captionStart="FIGURES 11–17" captionStartId="3.[151,259,1811,1832]" captionTargetBox="[152,1435,153,1784]" captionTargetId="figure-156@3.[152,1435,153,1784]" captionTargetPageId="3" captionText="FIGURES 11–17. SEM: Placoneis cocquytiae, all images from type population, Kidira, Senegal. Fig. 11. External overview of an entire valve; arrows indicate presence of an undulation in raphe branches. Note also irregular final striae near apex. Fig. 12. External overview of an entire valve in oblique view showing the series of areolae on mantle and stepped mantle edge. Fig. 13. External detail of central area allowing a view of the proximal raphe pores. Fig. 14. External detail of valve apex showing mantle areolae, distal raphe ending and irregular last stria on valve face. Fig. 15. Internal overview of entire valve. Fig. 16. Internal detail of central area showing raised central part and short deflected proximal raphe endings; note volate occlusions. Fig. 17. Internal detail of valve apex with helictoglossa. Scale bars represent10 µm." figureDoi="http://doi.org/10.5281/zenodo.5128993" httpUri="https://zenodo.org/record/5128993/files/figure.png" pageId="4" pageNumber="143">Figs 11, 14</figureCitation>
|
||
). The valve mantle is stepped and shallower towards the apices, with a large hyaline edge (
|
||
<figureCitation id="C5D610A88B10FFEAFD8C383BFDD05516" box="[537,621,260,285]" captionStart="FIGURES 11–17" captionStartId="3.[151,259,1811,1832]" captionTargetBox="[152,1435,153,1784]" captionTargetId="figure-156@3.[152,1435,153,1784]" captionTargetPageId="3" captionText="FIGURES 11–17. SEM: Placoneis cocquytiae, all images from type population, Kidira, Senegal. Fig. 11. External overview of an entire valve; arrows indicate presence of an undulation in raphe branches. Note also irregular final striae near apex. Fig. 12. External overview of an entire valve in oblique view showing the series of areolae on mantle and stepped mantle edge. Fig. 13. External detail of central area allowing a view of the proximal raphe pores. Fig. 14. External detail of valve apex showing mantle areolae, distal raphe ending and irregular last stria on valve face. Fig. 15. Internal overview of entire valve. Fig. 16. Internal detail of central area showing raised central part and short deflected proximal raphe endings; note volate occlusions. Fig. 17. Internal detail of valve apex with helictoglossa. Scale bars represent10 µm." figureDoi="http://doi.org/10.5281/zenodo.5128993" httpUri="https://zenodo.org/record/5128993/files/figure.png" pageId="4" pageNumber="143">Fig. 12</figureCitation>
|
||
). The raphe branches are straight near the proximal endings and show a distinct undulation towards the apices (
|
||
<figureCitation id="C5D610A88B10FFEAFDC93818FD0D554B" box="[604,688,295,320]" captionStart="FIGURES 11–17" captionStartId="3.[151,259,1811,1832]" captionTargetBox="[152,1435,153,1784]" captionTargetId="figure-156@3.[152,1435,153,1784]" captionTargetPageId="3" captionText="FIGURES 11–17. SEM: Placoneis cocquytiae, all images from type population, Kidira, Senegal. Fig. 11. External overview of an entire valve; arrows indicate presence of an undulation in raphe branches. Note also irregular final striae near apex. Fig. 12. External overview of an entire valve in oblique view showing the series of areolae on mantle and stepped mantle edge. Fig. 13. External detail of central area allowing a view of the proximal raphe pores. Fig. 14. External detail of valve apex showing mantle areolae, distal raphe ending and irregular last stria on valve face. Fig. 15. Internal overview of entire valve. Fig. 16. Internal detail of central area showing raised central part and short deflected proximal raphe endings; note volate occlusions. Fig. 17. Internal detail of valve apex with helictoglossa. Scale bars represent10 µm." figureDoi="http://doi.org/10.5281/zenodo.5128993" httpUri="https://zenodo.org/record/5128993/files/figure.png" pageId="4" pageNumber="143">Fig. 11</figureCitation>
|
||
, arrows). The proximal raphe endings are straight terminating in weakly spathulate pores (
|
||
<figureCitation id="C5D610A88B10FFEAFE213873FDB5556E" box="[436,520,332,357]" captionStart="FIGURES 11–17" captionStartId="3.[151,259,1811,1832]" captionTargetBox="[152,1435,153,1784]" captionTargetId="figure-156@3.[152,1435,153,1784]" captionTargetPageId="3" captionText="FIGURES 11–17. SEM: Placoneis cocquytiae, all images from type population, Kidira, Senegal. Fig. 11. External overview of an entire valve; arrows indicate presence of an undulation in raphe branches. Note also irregular final striae near apex. Fig. 12. External overview of an entire valve in oblique view showing the series of areolae on mantle and stepped mantle edge. Fig. 13. External detail of central area allowing a view of the proximal raphe pores. Fig. 14. External detail of valve apex showing mantle areolae, distal raphe ending and irregular last stria on valve face. Fig. 15. Internal overview of entire valve. Fig. 16. Internal detail of central area showing raised central part and short deflected proximal raphe endings; note volate occlusions. Fig. 17. Internal detail of valve apex with helictoglossa. Scale bars represent10 µm." figureDoi="http://doi.org/10.5281/zenodo.5128993" httpUri="https://zenodo.org/record/5128993/files/figure.png" pageId="4" pageNumber="143">Fig. 13</figureCitation>
|
||
). The distal raphe fissures are hooked, continuing onto the valve mantle (
|
||
<figureCitation id="C5D610A88B10FFEAFAD53873FF0B5583" captionStart="FIGURES 11–17" captionStartId="3.[151,259,1811,1832]" captionTargetBox="[152,1435,153,1784]" captionTargetId="figure-156@3.[152,1435,153,1784]" captionTargetPageId="3" captionText="FIGURES 11–17. SEM: Placoneis cocquytiae, all images from type population, Kidira, Senegal. Fig. 11. External overview of an entire valve; arrows indicate presence of an undulation in raphe branches. Note also irregular final striae near apex. Fig. 12. External overview of an entire valve in oblique view showing the series of areolae on mantle and stepped mantle edge. Fig. 13. External detail of central area allowing a view of the proximal raphe pores. Fig. 14. External detail of valve apex showing mantle areolae, distal raphe ending and irregular last stria on valve face. Fig. 15. Internal overview of entire valve. Fig. 16. Internal detail of central area showing raised central part and short deflected proximal raphe endings; note volate occlusions. Fig. 17. Internal detail of valve apex with helictoglossa. Scale bars represent10 µm." figureDoi="http://doi.org/10.5281/zenodo.5128993" httpUri="https://zenodo.org/record/5128993/files/figure.png" pageId="4" pageNumber="143">Figs 12, 14</figureCitation>
|
||
). The area around the distal fissures is enlarged and lacks striation or individual areolae (
|
||
<figureCitation id="C5D610A88B10FFEAFB0C3850FB515583" box="[1177,1260,367,392]" captionStart="FIGURES 11–17" captionStartId="3.[151,259,1811,1832]" captionTargetBox="[152,1435,153,1784]" captionTargetId="figure-156@3.[152,1435,153,1784]" captionTargetPageId="3" captionText="FIGURES 11–17. SEM: Placoneis cocquytiae, all images from type population, Kidira, Senegal. Fig. 11. External overview of an entire valve; arrows indicate presence of an undulation in raphe branches. Note also irregular final striae near apex. Fig. 12. External overview of an entire valve in oblique view showing the series of areolae on mantle and stepped mantle edge. Fig. 13. External detail of central area allowing a view of the proximal raphe pores. Fig. 14. External detail of valve apex showing mantle areolae, distal raphe ending and irregular last stria on valve face. Fig. 15. Internal overview of entire valve. Fig. 16. Internal detail of central area showing raised central part and short deflected proximal raphe endings; note volate occlusions. Fig. 17. Internal detail of valve apex with helictoglossa. Scale bars represent10 µm." figureDoi="http://doi.org/10.5281/zenodo.5128993" httpUri="https://zenodo.org/record/5128993/files/figure.png" pageId="4" pageNumber="143">Fig. 14</figureCitation>
|
||
). Internally, the raphe sternum is clearly raised above the valve plane and transapically expanded in the central area to form a weakly raised stauros which does not reach the valve margins (
|
||
<figureCitation id="C5D610A88B10FFEAFCC93888FC6355DB" box="[860,990,439,464]" captionStart="FIGURES 11–17" captionStartId="3.[151,259,1811,1832]" captionTargetBox="[152,1435,153,1784]" captionTargetId="figure-156@3.[152,1435,153,1784]" captionTargetPageId="3" captionText="FIGURES 11–17. SEM: Placoneis cocquytiae, all images from type population, Kidira, Senegal. Fig. 11. External overview of an entire valve; arrows indicate presence of an undulation in raphe branches. Note also irregular final striae near apex. Fig. 12. External overview of an entire valve in oblique view showing the series of areolae on mantle and stepped mantle edge. Fig. 13. External detail of central area allowing a view of the proximal raphe pores. Fig. 14. External detail of valve apex showing mantle areolae, distal raphe ending and irregular last stria on valve face. Fig. 15. Internal overview of entire valve. Fig. 16. Internal detail of central area showing raised central part and short deflected proximal raphe endings; note volate occlusions. Fig. 17. Internal detail of valve apex with helictoglossa. Scale bars represent10 µm." figureDoi="http://doi.org/10.5281/zenodo.5128993" httpUri="https://zenodo.org/record/5128993/files/figure.png" pageId="4" pageNumber="143">Figs 15, 16</figureCitation>
|
||
). The virgae are weakly raised between the slightly sunken striae, the latter, internally, composed of small, square areolae, covered by volate occlusions (
|
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<figureCitation id="C5D610A88B10FFEAFF0A38C0FE9E5613" box="[159,291,511,536]" captionStart="FIGURES 11–17" captionStartId="3.[151,259,1811,1832]" captionTargetBox="[152,1435,153,1784]" captionTargetId="figure-156@3.[152,1435,153,1784]" captionTargetPageId="3" captionText="FIGURES 11–17. SEM: Placoneis cocquytiae, all images from type population, Kidira, Senegal. Fig. 11. External overview of an entire valve; arrows indicate presence of an undulation in raphe branches. Note also irregular final striae near apex. Fig. 12. External overview of an entire valve in oblique view showing the series of areolae on mantle and stepped mantle edge. Fig. 13. External detail of central area allowing a view of the proximal raphe pores. Fig. 14. External detail of valve apex showing mantle areolae, distal raphe ending and irregular last stria on valve face. Fig. 15. Internal overview of entire valve. Fig. 16. Internal detail of central area showing raised central part and short deflected proximal raphe endings; note volate occlusions. Fig. 17. Internal detail of valve apex with helictoglossa. Scale bars represent10 µm." figureDoi="http://doi.org/10.5281/zenodo.5128993" httpUri="https://zenodo.org/record/5128993/files/figure.png" pageId="4" pageNumber="143">Figs 16, 17</figureCitation>
|
||
). The proximal raphe endings are very short but markedly unilaterally and bent towards the primary side (
|
||
<figureCitation id="C5D610A88B10FFEAFF463B1BFEE95636" box="[211,340,548,573]" captionStart="FIGURES 11–17" captionStartId="3.[151,259,1811,1832]" captionTargetBox="[152,1435,153,1784]" captionTargetId="figure-156@3.[152,1435,153,1784]" captionTargetPageId="3" captionText="FIGURES 11–17. SEM: Placoneis cocquytiae, all images from type population, Kidira, Senegal. Fig. 11. External overview of an entire valve; arrows indicate presence of an undulation in raphe branches. Note also irregular final striae near apex. Fig. 12. External overview of an entire valve in oblique view showing the series of areolae on mantle and stepped mantle edge. Fig. 13. External detail of central area allowing a view of the proximal raphe pores. Fig. 14. External detail of valve apex showing mantle areolae, distal raphe ending and irregular last stria on valve face. Fig. 15. Internal overview of entire valve. Fig. 16. Internal detail of central area showing raised central part and short deflected proximal raphe endings; note volate occlusions. Fig. 17. Internal detail of valve apex with helictoglossa. Scale bars represent10 µm." figureDoi="http://doi.org/10.5281/zenodo.5128993" httpUri="https://zenodo.org/record/5128993/files/figure.png" pageId="4" pageNumber="143">Figs 15, 16</figureCitation>
|
||
). The distal raphe endings terminate in small helictoglossae (
|
||
<figureCitation id="C5D610A88B10FFEAFB943B1BFB3E5636" box="[1025,1155,548,573]" captionStart="FIGURES 11–17" captionStartId="3.[151,259,1811,1832]" captionTargetBox="[152,1435,153,1784]" captionTargetId="figure-156@3.[152,1435,153,1784]" captionTargetPageId="3" captionText="FIGURES 11–17. SEM: Placoneis cocquytiae, all images from type population, Kidira, Senegal. Fig. 11. External overview of an entire valve; arrows indicate presence of an undulation in raphe branches. Note also irregular final striae near apex. Fig. 12. External overview of an entire valve in oblique view showing the series of areolae on mantle and stepped mantle edge. Fig. 13. External detail of central area allowing a view of the proximal raphe pores. Fig. 14. External detail of valve apex showing mantle areolae, distal raphe ending and irregular last stria on valve face. Fig. 15. Internal overview of entire valve. Fig. 16. Internal detail of central area showing raised central part and short deflected proximal raphe endings; note volate occlusions. Fig. 17. Internal detail of valve apex with helictoglossa. Scale bars represent10 µm." figureDoi="http://doi.org/10.5281/zenodo.5128993" httpUri="https://zenodo.org/record/5128993/files/figure.png" pageId="4" pageNumber="143">Figs 15, 17</figureCitation>
|
||
).
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |