282 lines
34 KiB
XML
282 lines
34 KiB
XML
<document id="084713269D03AFFBB4D45E1D7DCE5F27" ID-DOI="10.11646/phytotaxa.655.2.3" ID-ISSN="1179-3163" ID-Zenodo-Dep="13212948" IM.bibliography_approvedBy="felipe" IM.illustrations_approvedBy="felipe" IM.materialsCitations_approvedBy="felipe" IM.tables_requiresApprovalFor="GgImagineBatch" IM.taxonomicNames_approvedBy="felipe" IM.treatments_approvedBy="felipe" checkinTime="1722613645106" checkinUser="felipe" docAuthor="Levanets, Anatoliy & Vuuren, Sanet Janse Van" docDate="2024" docId="03B9694AFF980F57FF0AFCFE02EA3FB2" docLanguage="en" docName="phytotaxa.155.2.3.pdf" docOrigin="Phytotaxa 655 (2)" docSource="http://dx.doi.org/10.11646/phytotaxa.655.2.3" docStyle="DocumentStyle:96748F8F1B6C902996E134952A3A36B9.13:Phytotaxa.2014-.journal_article" docStyleId="96748F8F1B6C902996E134952A3A36B9" docStyleName="Phytotaxa.2014-.journal_article" docStyleVersion="13" docTitle="Pleurotaenium subcoronulatum var. rectum Borge 1903" docType="treatment" docVersion="2" lastPageNumber="152" masterDocId="FF801132FF900F5DFF82FFA403783E23" masterDocTitle="New insights into the morphology, taxonomy and geographical distribution of Pleurotaenium subcoronulatum (Zygnematophyceae, Desmidiales)" masterLastPageNumber="158" masterPageNumber="144" pageNumber="152" updateTime="1722801805157" updateUser="ExternalLinkService" zenodo-license-figures="UNSPECIFIED" zenodo-license-treatments="UNSPECIFIED">
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<mods:title id="3BCFD3F4A050470DC4A7B16A5E12E4F5">New insights into the morphology, taxonomy and geographical distribution of Pleurotaenium subcoronulatum (Zygnematophyceae, Desmidiales)</mods:title>
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<mods:name id="E25693F4F8DE47271547CF1A92FDF7AD" type="personal">
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<mods:roleTerm id="B4133E9BC4915FB205B77A03F7704DAD">Author</mods:roleTerm>
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<mods:namePart id="23BE2D59296C3FAC7D2DF2C5D35E3082">Levanets, Anatoliy</mods:namePart>
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<mods:nameIdentifier id="CF47004F3BFF4FDC514574535FBAC9C8" type="ORCID">0000-0002-6665-1290</mods:nameIdentifier>
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<mods:affiliation id="25BF26BB4FE34A7DA0C76908C4D5F799">Unit for Environmental Sciences and Management, North-West University, Potchefstroom 2520, South Africa</mods:affiliation>
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<mods:nameIdentifier id="DDF6A2ACBA3DBBB3C7746ABEE1D74CA8" type="email">20868421@nwu.ac.za</mods:nameIdentifier>
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<mods:roleTerm id="D3F4350498003563B6CD01CE79EB1194">Author</mods:roleTerm>
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<mods:namePart id="2BD73B76E43C2D67DDE979ED92E07BF6">Vuuren, Sanet Janse Van</mods:namePart>
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<mods:nameIdentifier id="F6CEFEDE9B4ED44EE256D5AD7C812961" type="ORCID">0000-0001-5361-9905</mods:nameIdentifier>
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<mods:affiliation id="D637FEC2A10CADF87F5169C950990F9E">Unit for Environmental Sciences and Management, North-West University, Potchefstroom 2520, South Africa</mods:affiliation>
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<mods:nameIdentifier id="985EB3DBD9F26F2F4B06C9D42FB1465A" type="email">sanet.jansevanvuuren@nwu.ac.za</mods:nameIdentifier>
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<mods:title id="5CF913766040AD50FFFE109B19E5CDDA">Phytotaxa</mods:title>
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<mods:part id="B082DC00F1410A3686BC323BFDD10574">
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<mods:date id="5D9067206A5ED67E7ECE6C88C6F14DB7">2024</mods:date>
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<mods:number id="C4C60981EB6826AE30DDA221D3D53BF6">2024-06-25</mods:number>
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<mods:number id="9FD4C355F59C3617855B896770BD2CDB">655</mods:number>
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<mods:number id="8918F9022C8A56AA91DE8369A3253923">2</mods:number>
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<mods:url id="92049D78AFEC3D2902B04D4A177C8E9B">http://dx.doi.org/10.11646/phytotaxa.655.2.3</mods:url>
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<treatment id="03B9694AFF980F57FF0AFCFE02EA3FB2" ID-DOI="http://doi.org/10.5281/zenodo.13212922" ID-Zenodo-Dep="13212922" LSID="urn:lsid:plazi:treatment:03B9694AFF980F57FF0AFCFE02EA3FB2" httpUri="http://treatment.plazi.org/id/03B9694AFF980F57FF0AFCFE02EA3FB2" lastPageId="10" lastPageNumber="152" pageId="8" pageNumber="152">
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<subSubSection id="C30A8BD7FF980F55FF0AFCFE008D3D57" box="[136,1013,858,885]" pageId="8" pageNumber="152" type="nomenclature">
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<paragraph id="8BAFD85CFF980F55FF0AFCFE008D3D57" blockId="8.[136,1013,858,885]" box="[136,1013,858,885]" pageId="8" pageNumber="152">
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<heading id="D0E76F30FF980F55FF0AFCFE008D3D57" box="[136,1013,858,885]" fontSize="11" level="2" pageId="8" pageNumber="152" reason="4">
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<emphasis id="B964044EFF980F55FF0AFCFE03E53D57" bold="true" box="[136,157,858,884]" pageId="8" pageNumber="152">8.</emphasis>
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<taxonomicName id="4C10A3DFFF980F55FF3FFCFE00173D57" authority="Borge 1903: 82" authorityName="Borge" authorityPageNumber="82" authorityYear="1903" box="[189,879,858,885]" class="Conjugatophyceae" family="Desmidiaceae" genus="Pleurotaenium" kingdom="Plantae" order="Zygnematales" pageId="8" pageNumber="152" phylum="Charophyta" rank="variety" species="subcoronulatum" variety="rectum">
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<emphasis id="B964044EFF980F55FF3FFCFE01573D56" bold="true" box="[189,559,858,885]" italics="true" pageId="8" pageNumber="152">Pleurotaenium subcoronulatum</emphasis>
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var.
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<emphasis id="B964044EFF980F55FDE4FCFF01CF3D56" bold="true" box="[614,695,859,885]" italics="true" pageId="8" pageNumber="152">rectum</emphasis>
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<bibRefCitation id="EF81A5ADFF980F55FD3CFCFF00173D57" author="Borge, O." box="[702,879,858,885]" pageId="8" pageNumber="152" pagination="71 - 138" refId="ref8120" refString="Borge, O. (1903) Die Algen der ersten Regnellschel Expedition. 2. Desmidiaceen. Arkiv for Botanik 1: 71 - 138." type="journal article" year="1903">Borge 1903: 82</bibRefCitation>
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</taxonomicName>
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; pl. 2, fig. 3
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</heading>
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||
</paragraph>
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||
</subSubSection>
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||
<subSubSection id="C30A8BD7FF980F55FF0AFC3F07F83D96" box="[136,1152,922,949]" pageId="8" pageNumber="152" type="materials_examined">
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<paragraph id="8BAFD85CFF980F55FF0AFC3F07F83D96" blockId="8.[136,1452,922,2076]" box="[136,1152,922,949]" pageId="8" pageNumber="152">
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<emphasis id="B964044EFF980F55FF0AFC3F02523D96" bold="true" box="[136,298,922,949]" pageId="8" pageNumber="152">
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<typeStatus id="54AB66FEFF980F55FF0AFC3F03BB3D96" box="[136,195,923,949]" pageId="8" pageNumber="152">Type</typeStatus>
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locality:
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</emphasis>
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<collectingCountry id="F30798CCFF980F55FEB3FC3F02003D96" box="[305,376,923,949]" name="Brazil" pageId="8" pageNumber="152">Brazil</collectingCountry>
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,
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<collectingRegion id="49D416BEFF980F55FE06FC3F012F3D96" box="[388,599,923,949]" country="Brazil" name="Rio Grande do Sul" pageId="8" pageNumber="152">Rio Grande do Sul</collectingRegion>
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, Cachoeira, under
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<taxonomicName id="4C10A3DFFF980F55FCABFC3F00DC3D96" authorityName="Agardh" authorityYear="1824" box="[809,932,923,949]" class="Charophyceae" family="Characeae" kingdom="Plantae" order="Charales" pageId="8" pageNumber="152" phylum="Charophyta" rank="family">
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<emphasis id="B964044EFF980F55FCABFC3F00DC3D96" box="[809,932,923,949]" italics="true" pageId="8" pageNumber="152">Characeae</emphasis>
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</taxonomicName>
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,
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<date id="FFAEFE9CFF980F55FC30FC3F07043D96" box="[946,1148,923,949]" pageId="8" pageNumber="152" value="1893-02-22">22 February 1893</date>
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.
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</paragraph>
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</subSubSection>
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<subSubSection id="C30A8BD7FF980F55FF3FFC1A021B3AAB" pageId="8" pageNumber="152" type="description">
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<paragraph id="8BAFD85CFF980F55FF3FFC1A021B3AAB" blockId="8.[136,1452,922,2076]" pageId="8" pageNumber="152">
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<emphasis id="B964044EFF980F55FF3FFC1A02293DFB" bold="true" box="[189,337,958,984]" pageId="8" pageNumber="152">Description:</emphasis>
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Semicell margins are parallel and straight (
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<figureCitation id="132BC4D9FF980F55FCB4FC1A00F63DFB" box="[822,910,958,984]" captionStart="FIGURE 4" captionStartId="9.[136,229,1918,1940]" captionTargetBox="[247,1341,195,1879]" captionTargetId="figure-29@9.[236,1350,187,1890]" captionTargetPageId="9" captionText="FIGURE 4. Comparison of the morphology of P. subcoronulatum with closely related infraspecific taxa. A) P. subcoronulatum (from Turner 1893), B) P. subcoronulatum (from West & West 1895, C) P. subcoronulatum f. elongatum (from Prescott et al. 1975), D) P. subcoronulatum var. africanum (from Krieger 1937), E) P. subcoronulatum var. detum (from West & West 1896), F) P. subcoronulatum var. maximum (from Van Oye 1953), G) P. subcoronulatum var. rectum (from Borge 1903) and H) P. subcoronulatum var. spinulosum (from Opute 2000). No scale bars; dimensions indicated in descriptions." figureDoi="http://doi.org/10.5281/zenodo.13212956" httpUri="https://zenodo.org/record/13212956/files/figure.png" pageId="8" pageNumber="152">Fig. 4G</figureCitation>
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) and not undulated like that of the
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<typeStatus id="54AB66FEFF980F55FA91FC1A063F3DFB" box="[1299,1351,958,984]" pageId="8" pageNumber="152">type</typeStatus>
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. There is a crown of 8–10 slightly swollen tubercles around the apex. Cells are 13–15 times longer than wide. The width at the isthmus is 24.5–25 µm, at the basal inflation 30 μm, and at the apex 27–27.5 μm (
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<bibRefCitation id="EF81A5ADFF980F55FB96FBA007E43A3D" author="Borge, O." box="[1044,1180,1028,1054]" pageId="8" pageNumber="152" pagination="71 - 138" refId="ref8120" refString="Borge, O. (1903) Die Algen der ersten Regnellschel Expedition. 2. Desmidiaceen. Arkiv for Botanik 1: 71 - 138." type="journal article" year="1903">Borge 1903</bibRefCitation>
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). Some cells correspond to
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<taxonomicName id="4C10A3DFFF980F55FF26FB8C02953A62" box="[164,493,1063,1090]" class="Conjugatophyceae" family="Desmidiaceae" genus="Pleurotaenium" kingdom="Plantae" order="Zygnematales" pageId="8" pageNumber="152" phylum="Charophyta" rank="variety" species="subcoronulatum" variety="detum">
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<emphasis id="B964044EFF980F55FF26FB8C020B3A62" box="[164,371,1063,1089]" italics="true" pageId="8" pageNumber="152">P. subcoronulatum</emphasis>
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var.
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<emphasis id="B964044EFF980F55FE2BFB8302953A62" box="[425,493,1063,1089]" italics="true" pageId="8" pageNumber="152">detum</emphasis>
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</taxonomicName>
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, having a constriction below the apex; however, the constriction is never as prominent as that of
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<taxonomicName id="4C10A3DFFF980F55FF71FBE801443A46" box="[243,572,1099,1125]" class="Conjugatophyceae" family="Desmidiaceae" genus="Pleurotaenium" kingdom="Plantae" order="Zygnematales" pageId="8" pageNumber="152" phylum="Charophyta" rank="variety" species="subcoronulatum" variety="detum">
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<emphasis id="B964044EFF980F55FF71FBE802BB3A46" box="[243,451,1099,1125]" italics="true" pageId="8" pageNumber="152">P. subcoronulatum</emphasis>
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var.
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<emphasis id="B964044EFF980F55FE7AFBEF01443A46" box="[504,572,1099,1125]" italics="true" pageId="8" pageNumber="152">detum</emphasis>
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</taxonomicName>
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. In addition, in some individuals such a constriction is present on one semicell, but not in the other.
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</paragraph>
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</subSubSection>
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<subSubSection id="C30A8BD7FF980F57FF3FFB3502EA3FB2" lastPageId="10" lastPageNumber="154" pageId="8" pageNumber="152" type="distribution">
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<paragraph id="8BAFD85CFF980F55FF3FFB3502213A88" blockId="8.[136,1452,922,2076]" box="[189,345,1169,1195]" pageId="8" pageNumber="152">
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<emphasis id="B964044EFF980F55FF3FFB3502213A88" bold="true" box="[189,345,1169,1195]" pageId="8" pageNumber="152">Distribution:</emphasis>
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</paragraph>
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<paragraph id="8BAFD85CFF980F55FF3FFB1000043AED" blockId="8.[136,1452,922,2076]" box="[189,892,1204,1231]" pageId="8" pageNumber="152">
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<emphasis id="B964044EFF980F55FF3FFB1002013AED" bold="true" box="[189,377,1204,1230]" pageId="8" pageNumber="152">South America:</emphasis>
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<collectingCountry id="F30798CCFF980F55FE02FB1002BC3AED" box="[384,452,1204,1230]" name="Brazil" pageId="8" pageNumber="152">Brazil</collectingCountry>
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(
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<bibRefCitation id="EF81A5ADFF980F55FE51FB1001223AED" author="Borge, O." box="[467,602,1204,1230]" pageId="8" pageNumber="152" pagination="71 - 138" refId="ref8120" refString="Borge, O. (1903) Die Algen der ersten Regnellschel Expedition. 2. Desmidiaceen. Arkiv for Botanik 1: 71 - 138." type="journal article" year="1903">Borge 1903</bibRefCitation>
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;
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<bibRefCitation id="EF81A5ADFF980F55FDE4FB1000173AED" author="Bicudo, C. E. M. & Martau, L." box="[614,879,1204,1231]" pageId="8" pageNumber="152" pagination="31 - 40" refId="ref8019" refString="Bicudo, C. E. M. & Martau, L. (1974) Catalogo das algas de aguas continentais do Estado do Rio Grande do Sul, Brasil: II - Charophyceae, Chlorophyceae, Chrysophyceae, Cyanophyceae, Rhodophyceae e Xanthophyceae. Iheringia Serie Botanica 19: 31 - 40." type="journal article" year="1974">Bicudo & Martau 1974</bibRefCitation>
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||
).
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</paragraph>
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<paragraph id="8BAFD85CFF980F55FF3FFB7C03A43B78" blockId="8.[136,1452,922,2076]" pageId="8" pageNumber="152">
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<emphasis id="B964044EFF980F55FF3FFB7C038D3AD1" bold="true" box="[189,245,1240,1266]" pageId="8" pageNumber="152">Note</emphasis>
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:
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<bibRefCitation id="EF81A5ADFF980F55FE87FB7302D43AD1" author="Krieger, W." box="[261,428,1239,1266]" pageId="8" pageNumber="152" pagination="376 - 536" refId="ref9816" refString="Krieger, W. (1937) Die Desmidiaceen Europas mit Berucksichtigung der aussereuropaischen Arten. Band 13. Abteilung 1, Lieferung 3 of Dr. Rabenhorst's Kryptogamen-Flora von Deutschland, Osterreich und der Schweiz. Akademische Verlagsgeselschaft M. B. H., Leipzig, pp. 376 - 536." type="book chapter" year="1937">Krieger (1937)</bibRefCitation>
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included this variety as synonym in
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<taxonomicName id="4C10A3DFFF980F55FCC9FB7306213AD1" authorityName="Willi Krieger" authorityYear="1937" baseAuthorityName="Schmidle" box="[843,1369,1239,1266]" class="Conjugatophyceae" family="Desmidiaceae" genus="Pleurotaenium" kingdom="Plantae" order="Zygnematales" pageId="8" pageNumber="152" phylum="Charophyta" rank="variety" species="subcoronulatum" variety="africanum">
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<emphasis id="B964044EFF980F55FCC9FB7307D53AD2" box="[843,1197,1239,1265]" italics="true" pageId="8" pageNumber="152">Pleurotaenium subcoronulatum</emphasis>
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var.
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<emphasis id="B964044EFF980F55FB64FB7C06213AD1" box="[1254,1369,1240,1266]" italics="true" pageId="8" pageNumber="152">africanum</emphasis>
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</taxonomicName>
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. In our opinion Borge’s variety is morphologically different due to the smaller size of the cells (0.8-0.9 times), wider basal inflation and apex, and a half number of the tubercles. We believe that this alga deserves to remain in the rank of variety.
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</paragraph>
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<paragraph id="8BAFD85CFF980F55FF3FFAC1027C382F" blockId="8.[136,1452,922,2076]" pageId="8" pageNumber="152">
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From the map (
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<figureCitation id="132BC4D9FF980F55FEEBFAC002D53B5D" box="[361,429,1380,1406]" captionStart="FIGURE 3" captionStartId="3.[136,229,1676,1698]" captionTargetBox="[442,1113,602,1636]" captionTargetId="figure-210@3.[442,1146,602,1648]" captionTargetPageId="3" captionText="FIGURE 3. Global distribution of all infraspecific taxa of Pleurotaenium subcoronulatum. A) Comprehensive depiction sourced from previous publications, B) Close-up view of the southern African region, highlighting the distribution of P. subcoronulatum along with its infraspecific taxa." figureDoi="http://doi.org/10.5281/zenodo.13212954" httpUri="https://zenodo.org/record/13212954/files/figure.png" pageId="8" pageNumber="152">Fig. 3</figureCitation>
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), together with paragraphs above, it is clear that
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<taxonomicName id="4C10A3DFFF980F55FC4CFAC107E73B5D" box="[974,1183,1380,1406]" class="Conjugatophyceae" family="Desmidiaceae" genus="Pleurotaenium" kingdom="Plantae" order="Zygnematales" pageId="8" pageNumber="152" phylum="Charophyta" rank="species" species="subcoronulatum">
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<emphasis id="B964044EFF980F55FC4CFAC107E73B5D" box="[974,1183,1380,1406]" italics="true" pageId="8" pageNumber="152">P. subcoronulatum</emphasis>
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</taxonomicName>
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(including infraspecific taxa) is widely distributed, being present on most continents. Surprisingly, it was not recorded from any European countries. The
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<collectingCountry id="F30798CCFF980F55FEB0FA0F01773BE6" box="[306,527,1451,1477]" name="Russia" pageId="8" pageNumber="152">Russian Federation</collectingCountry>
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, where
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<taxonomicName id="4C10A3DFFF980F55FDEAFA0800C13BE6" box="[616,953,1451,1477]" class="Conjugatophyceae" family="Desmidiaceae" genus="Pleurotaenium" kingdom="Plantae" order="Zygnematales" pageId="8" pageNumber="152" phylum="Charophyta" rank="variety" species="subcoronulatum" variety="detum">
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<emphasis id="B964044EFF980F55FDEAFA0800433BE6" box="[616,827,1451,1477]" italics="true" pageId="8" pageNumber="152">P. subcoronulatum</emphasis>
|
||
var.
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<emphasis id="B964044EFF980F55FCF7FA0F00C13BE6" box="[885,953,1451,1477]" italics="true" pageId="8" pageNumber="152">detum</emphasis>
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</taxonomicName>
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was recorded (
|
||
<figureCitation id="132BC4D9FF980F55FBE8FA0F07BD3BE6" box="[1130,1221,1451,1477]" captionStart="FIGURE 3" captionStartId="3.[136,229,1676,1698]" captionTargetBox="[442,1113,602,1636]" captionTargetId="figure-210@3.[442,1146,602,1648]" captionTargetPageId="3" captionText="FIGURE 3. Global distribution of all infraspecific taxa of Pleurotaenium subcoronulatum. A) Comprehensive depiction sourced from previous publications, B) Close-up view of the southern African region, highlighting the distribution of P. subcoronulatum along with its infraspecific taxa." figureDoi="http://doi.org/10.5281/zenodo.13212954" httpUri="https://zenodo.org/record/13212954/files/figure.png" pageId="8" pageNumber="152">Fig. 3A</figureCitation>
|
||
), forms part of both Europe and Asia, but the sampling site where this taxon was found was located close to the Chinese border, in the Asian part.
|
||
</paragraph>
|
||
<paragraph id="8BAFD85CFF980F55FF3FF9B1019B38FD" blockId="8.[136,1452,922,2076]" pageId="8" pageNumber="152">
|
||
A new alga,
|
||
<taxonomicName id="4C10A3DFFF980F55FEC8F9B00768380D" authority="De Wildeman (1897: 91)" authorityName="De Wildeman" authorityPageNumber="91" authorityYear="1897" box="[330,1040,1556,1583]" class="Conjugatophyceae" family="Desmidiaceae" genus="Docidium" kingdom="Plantae" order="Zygnematales" pageId="8" pageNumber="152" phylum="Charophyta" rank="variety" species="subcoronulatum" variety="major">
|
||
<emphasis id="B964044EFF980F55FEC8F9B0010D380D" box="[330,629,1556,1582]" italics="true" pageId="8" pageNumber="152">Docidium subcoronulatum</emphasis>
|
||
var.
|
||
<emphasis id="B964044EFF980F55FD2FF9B10188380D" box="[685,752,1557,1582]" italics="true" pageId="8" pageNumber="152">major</emphasis>
|
||
<bibRefCitation id="EF81A5ADFF980F55FD75F9B10768380D" author="De Wildeman, E." box="[759,1040,1556,1583]" pageId="8" pageNumber="152" pagination="32 - 106" refId="ref8648" refString="De Wildeman, E. (1897) Observations sur les algues rapportees par M. J. Massart d'un voyage aux Indes Neerlandaises. Annales du Jardin Botanique de Buitenzorg Suppl. 1: 32 - 106." type="journal article" year="1897">De Wildeman (1897: 91)</bibRefCitation>
|
||
</taxonomicName>
|
||
was described, from the freshwaters of
|
||
<collectingCountry id="F30798CCFF980F55FF27F993026A3872" box="[165,274,1591,1617]" name="Indonesia" pageId="8" pageNumber="152">Indonesia</collectingCountry>
|
||
(
|
||
<collectingRegion id="49D416BEFF980F55FEA2F99C022E3871" box="[288,342,1592,1618]" country="Indonesia" name="Jawa Timur" pageId="8" pageNumber="152">Java</collectingRegion>
|
||
, Tjampea [now Ciampea] near Bogor).
|
||
<bibRefCitation id="EF81A5ADFF980F55FC8FF99C008F3871" author="De Wildeman, E." box="[781,1015,1591,1618]" pageId="8" pageNumber="152" pagination="32 - 106" refId="ref8648" refString="De Wildeman, E. (1897) Observations sur les algues rapportees par M. J. Massart d'un voyage aux Indes Neerlandaises. Annales du Jardin Botanique de Buitenzorg Suppl. 1: 32 - 106." type="journal article" year="1897">De Wildeman (1897)</bibRefCitation>
|
||
noted that this
|
||
<taxonomicName id="4C10A3DFFF980F55FB22F99306583871" box="[1184,1312,1591,1618]" pageId="8" pageNumber="152" rank="variety" variety="was">variety was</taxonomicName>
|
||
very similar to the
|
||
<typeStatus id="54AB66FEFF980F55FF51F9FF027B3856" box="[211,259,1627,1653]" pageId="8" pageNumber="152">type</typeStatus>
|
||
described by
|
||
<bibRefCitation id="EF81A5ADFF980F55FE25F9FF01313856" author="Turner, W. B." box="[423,585,1627,1653]" pageId="8" pageNumber="152" pagination="1 - 187" refId="ref12318" refString="Turner, W. B. (1893) Algae aquae dulcis Indiae orientalis. The freshwater algae (principally Desmidieae) of East India. Kungliga Svenska Vetenskaps-Akademiens Handlingar 25 (5): 1 - 187." type="journal article" year="1893">Turner (1893)</bibRefCitation>
|
||
, except for its size which was considerably larger. Although the cells were approximately the same length than the
|
||
<typeStatus id="54AB66FEFF980F55FDDBF9DA01F138BB" box="[601,649,1662,1688]" pageId="8" pageNumber="152">type</typeStatus>
|
||
(
|
||
<tableCitation id="C692EDE7FF980F55FD18F9DA018938BB" box="[666,753,1662,1688]" captionStart="TABLE 1" captionStartId="5.[136,224,159,183]" captionText="TABLE 1. A comparison of the dimensions of Pleurotaenium subcoronulatum and P. subcoronulatum f. majus found in the Okavango Delta with known dimensions from previous publications (- = no dimensions indicated; ° = Democratic Republic of the Congo)." pageId="8" pageNumber="152">Table 1</tableCitation>
|
||
), they were noticeably wider. Dimensions were indicated as follows: Isthmus 44 μm in diameter, basal inflation 56 μm, apex 52 μm. These measurements are almost double the size indicated for the
|
||
<typeStatus id="54AB66FEFF980F55FEFBF96102D138FC" box="[377,425,1733,1759]" pageId="8" pageNumber="152">type</typeStatus>
|
||
by
|
||
<bibRefCitation id="EF81A5ADFF980F55FE51F961011738FD" author="Turner, W. B." box="[467,623,1732,1759]" pageId="8" pageNumber="152" pagination="1 - 187" refId="ref12318" refString="Turner, W. B. (1893) Algae aquae dulcis Indiae orientalis. The freshwater algae (principally Desmidieae) of East India. Kungliga Svenska Vetenskaps-Akademiens Handlingar 25 (5): 1 - 187." type="journal article" year="1893">Turner (1893)</bibRefCitation>
|
||
(
|
||
<tableCitation id="C692EDE7FF980F55FDFCF96001AA38FD" box="[638,722,1732,1758]" captionStart="TABLE 1" captionStartId="5.[136,224,159,183]" captionText="TABLE 1. A comparison of the dimensions of Pleurotaenium subcoronulatum and P. subcoronulatum f. majus found in the Okavango Delta with known dimensions from previous publications (- = no dimensions indicated; ° = Democratic Republic of the Congo)." pageId="8" pageNumber="152">Table 1</tableCitation>
|
||
).
|
||
</paragraph>
|
||
<paragraph id="8BAFD85CFF980F55FF3FF94C023C396B" blockId="8.[136,1452,922,2076]" pageId="8" pageNumber="152">
|
||
In the following paragraphs taxonomical and nomenclatural recommendation is proposed based on morphological characteristics and their taxonomical value in the distinguishing of infraspecific taxon of
|
||
<taxonomicName id="4C10A3DFFF980F55FA84F8AF0245396B" class="Conjugatophyceae" family="Desmidiaceae" genus="Pleurotaenium" kingdom="Plantae" order="Zygnematales" pageId="8" pageNumber="152" phylum="Charophyta" rank="species" species="subcoronulatum">
|
||
<emphasis id="B964044EFF980F55FA84F8AF0245396B" italics="true" pageId="8" pageNumber="152">Pleurotaenium subcoronulatum</emphasis>
|
||
</taxonomicName>
|
||
.
|
||
</paragraph>
|
||
<paragraph id="8BAFD85CFF980F57FF3FF8F502EA3FB2" blockId="8.[136,1452,922,2076]" lastBlockId="10.[136,1452,158,401]" lastPageId="10" lastPageNumber="154" pageId="8" pageNumber="152">
|
||
As previously noted,
|
||
<taxonomicName id="4C10A3DFFF980F55FE44F8F500F3394F" authority="W. B. Turner" authorityName="W. B. Turner" authorityYear="1893" box="[454,907,1873,1900]" class="Conjugatophyceae" family="Desmidiaceae" genus="Docidium" kingdom="Plantae" order="Zygnematales" pageId="8" pageNumber="152" phylum="Charophyta" rank="species" species="subcoronulatum">
|
||
<emphasis id="B964044EFF980F55FE44F8F501813948" box="[454,761,1873,1899]" italics="true" pageId="8" pageNumber="152">Docidium subcoronulatum</emphasis>
|
||
W.B.Turner
|
||
</taxonomicName>
|
||
was transferred to the genus
|
||
<taxonomicName id="4C10A3DFFF980F55FA84F8F5021A39AD" authority="Nageli (1849: 104)" authorityName="Nageli" authorityPageNumber="104" authorityYear="1849" class="Conjugatophyceae" family="Desmidiaceae" genus="Pleurotaenium" kingdom="Plantae" order="Zygnematales" pageId="8" pageNumber="152" phylum="Charophyta" rank="genus">
|
||
<emphasis id="B964044EFF980F55FA84F8F506D33948" box="[1286,1451,1873,1899]" italics="true" pageId="8" pageNumber="152">Pleurotaenium</emphasis>
|
||
<bibRefCitation id="EF81A5ADFF980F55FF0AF8D0021A39AD" author="Nageli, C." box="[136,354,1908,1934]" pageId="8" pageNumber="152" pagination="1 - 139" refId="ref10491" refString="Nageli, C. (1849) Gattungen einzelliger Algen, physiologisch und systematisch bearbeitet. Neue Denkschriften der Allg. Schweizerischen Gesellschaft fur die Gesammten Naturwissenschaften 10 (7): 1 - 139." type="journal article" year="1849">Nägeli (1849: 104)</bibRefCitation>
|
||
</taxonomicName>
|
||
, as
|
||
<taxonomicName id="4C10A3DFFF980F55FE12F8D1007939AD" authority="(W. B. Turner)" baseAuthorityName="W. B. Turner" box="[400,769,1908,1934]" class="Conjugatophyceae" family="Desmidiaceae" genus="Docidium" kingdom="Plantae" order="Zygnematales" pageId="8" pageNumber="152" phylum="Charophyta" rank="species" species="subcoronulatum">
|
||
<emphasis id="B964044EFF980F55FE12F8D1011A39AD" box="[400,610,1908,1934]" italics="true" pageId="8" pageNumber="152">P. subcoronulatum</emphasis>
|
||
(W.B.Turner)
|
||
</taxonomicName>
|
||
West & G.S.
|
||
<bibRefCitation id="EF81A5ADFF980F55FC13F8D0075E39AC" author="West, W. & West, G. S." box="[913,1062,1908,1935]" pageId="8" pageNumber="152" pagination="41 - 90" refId="ref12518" refString="West, W. & West, G. S. (1895) A contribution to our knowledge of the freshwater algae of Madagascar. Transactions of the Linnean Society of Botany, London 5: 41 - 90." type="journal article" year="1895">West (1895)</bibRefCitation>
|
||
, and as a result, the transfer of
|
||
<taxonomicName id="4C10A3DFFF980F55FA12F8D1012C3992" authority="De Wildeman" authorityName="De Wildeman" class="Conjugatophyceae" family="Desmidiaceae" genus="Docidium" kingdom="Plantae" order="Zygnematales" pageId="8" pageNumber="152" phylum="Charophyta" rank="variety" species="subcoronulatum" variety="major">
|
||
<emphasis id="B964044EFF980F55FA12F8D102453992" italics="true" pageId="8" pageNumber="152">D. subcoronulatum</emphasis>
|
||
var.
|
||
<emphasis id="B964044EFF980F55FEF0F83C02CD3992" box="[370,437,1944,1969]" italics="true" pageId="8" pageNumber="152">major</emphasis>
|
||
De Wildeman
|
||
</taxonomicName>
|
||
is also necessary. As this variety is morphologically related to
|
||
<taxonomicName id="4C10A3DFFF980F55FA84F83302A539F6" authority="(W. B. Turner)" baseAuthorityName="W. B. Turner" class="Conjugatophyceae" family="Desmidiaceae" genus="Pleurotaenium" kingdom="Plantae" order="Zygnematales" pageId="8" pageNumber="152" phylum="Charophyta" rank="species" species="subcoronulatum">
|
||
<emphasis id="B964044EFF980F55FA84F833024539F6" italics="true" pageId="8" pageNumber="152">Pleurotaenium subcoronulatum</emphasis>
|
||
(W.B.Turner)
|
||
</taxonomicName>
|
||
West & G.S.West,
|
||
<taxonomicName id="4C10A3DFFF980F55FD3FF818076F39F6" box="[701,1047,1979,2005]" class="Conjugatophyceae" family="Desmidiaceae" genus="Pleurotaenium" kingdom="Plantae" order="Zygnematales" pageId="8" pageNumber="152" phylum="Charophyta" rank="variety" species="subcoronulatum" variety="major">
|
||
<emphasis id="B964044EFF980F55FD3FF81800EF39F6" box="[701,919,1979,2005]" italics="true" pageId="8" pageNumber="152">D. subcoronulatum</emphasis>
|
||
var.
|
||
<emphasis id="B964044EFF980F55FC56F818076F39F6" box="[980,1047,1980,2005]" italics="true" pageId="8" pageNumber="152">major</emphasis>
|
||
</taxonomicName>
|
||
should be included in it. However, a comparison of the characteristics of
|
||
<taxonomicName id="4C10A3DFFF980F55FDC2F87A077139DB" authorityName="M. F. Rich Transactions" authorityYear="1935" box="[576,1033,2014,2040]" class="Conjugatophyceae" family="Desmidiaceae" form="majus" genus="Pleurotaenium" kingdom="Plantae" order="Zygnematales" pageId="8" pageNumber="152" phylum="Charophyta" rank="form" species="subcoronulatum">
|
||
<emphasis id="B964044EFF980F55FDC2F87A00DB39DB" box="[576,931,2014,2040]" italics="true" pageId="8" pageNumber="152">Pleurotaenium subcoronulatum</emphasis>
|
||
f.
|
||
<emphasis id="B964044EFF980F55FC44F87B077139DB" box="[966,1033,2015,2040]" italics="true" pageId="8" pageNumber="152">majus</emphasis>
|
||
</taxonomicName>
|
||
(discussed in the paragraphs above) and
|
||
<taxonomicName id="4C10A3DFFF980F55FF3AF7A70174363F" box="[184,524,2050,2076]" class="Conjugatophyceae" family="Desmidiaceae" genus="Pleurotaenium" kingdom="Plantae" order="Zygnematales" pageId="8" pageNumber="152" phylum="Charophyta" rank="variety" species="subcoronulatum" variety="major">
|
||
<emphasis id="B964044EFF980F55FF3AF7A702E8363F" box="[184,400,2050,2076]" italics="true" pageId="8" pageNumber="152">D. subcoronulatum</emphasis>
|
||
var.
|
||
<emphasis id="B964044EFF980F55FE4BF7A70174363F" box="[457,524,2051,2076]" italics="true" pageId="8" pageNumber="152">major</emphasis>
|
||
</taxonomicName>
|
||
are compared, it is clear that these two taxa are morphologically almost identical. Similar characteristics include various aspects of morphology and cell dimensions. The morphology of these two taxa furthermore corresponds to the morphology of the cells found in the Okavango
|
||
<collectingRegion id="49D416BEFF9A0F57FC7DFF6607473EFF" box="[1023,1087,194,220]" country="Nigeria" name="Delta" pageId="10" pageNumber="154">Delta</collectingRegion>
|
||
. Based on similar characteristics and dimensions, it is proposed to combine
|
||
<taxonomicName id="4C10A3DFFF9A0F57FD03FF4300C63F23" authorityName="M. F. Rich Transactions" authorityYear="1935" box="[641,958,230,256]" class="Conjugatophyceae" family="Desmidiaceae" form="majus" genus="Pleurotaenium" kingdom="Plantae" order="Zygnematales" pageId="10" pageNumber="154" phylum="Charophyta" rank="form" species="subcoronulatum">
|
||
<emphasis id="B964044EFF9A0F57FD03FF43002D3F23" box="[641,853,230,256]" italics="true" pageId="10" pageNumber="154">P. subcoronulatum</emphasis>
|
||
f.
|
||
<emphasis id="B964044EFF9A0F57FCF9FF4300C63F23" box="[891,958,231,256]" italics="true" pageId="10" pageNumber="154">majus</emphasis>
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName id="4C10A3DFFF9A0F57FC79FF4306203F23" box="[1019,1368,230,257]" class="Conjugatophyceae" family="Desmidiaceae" genus="Pleurotaenium" kingdom="Plantae" order="Zygnematales" pageId="10" pageNumber="154" phylum="Charophyta" rank="variety" species="subcoronulatum" variety="major">
|
||
<emphasis id="B964044EFF9A0F57FC79FF4307AE3F23" box="[1019,1238,230,256]" italics="true" pageId="10" pageNumber="154">D. subcoronulatum</emphasis>
|
||
var.
|
||
<emphasis id="B964044EFF9A0F57FA97FF4306203F23" box="[1301,1368,231,256]" italics="true" pageId="10" pageNumber="154">major</emphasis>
|
||
</taxonomicName>
|
||
and to raise the combined taxon to the level of variety (
|
||
<taxonomicName id="4C10A3DFFF9A0F57FD35FEAF077F3F07" authorityName="M. F. Rich Transactions" authorityYear="1935" box="[695,1031,266,293]" class="Conjugatophyceae" family="Desmidiaceae" genus="Pleurotaenium" kingdom="Plantae" order="Zygnematales" pageId="10" pageNumber="154" phylum="Charophyta" rank="variety" species="subcoronulatum" variety="majus">
|
||
<emphasis id="B964044EFF9A0F57FD35FEAF00F13F07" box="[695,905,266,292]" italics="true" pageId="10" pageNumber="154">P. subcoronulatum</emphasis>
|
||
var.
|
||
<emphasis id="B964044EFF9A0F57FC46FEAF077F3F07" box="[964,1031,267,292]" italics="true" pageId="10" pageNumber="154">majus</emphasis>
|
||
</taxonomicName>
|
||
).
|
||
<taxonomicName id="4C10A3DFFF9A0F57FBA2FEAF062E3F07" authorityName="M. F. Rich Transactions" authorityYear="1935" box="[1056,1366,266,292]" class="Conjugatophyceae" family="Desmidiaceae" form="majus" genus="Pleurotaenium" kingdom="Plantae" order="Zygnematales" pageId="10" pageNumber="154" phylum="Charophyta" rank="form" species="subcoronulatum">
|
||
<emphasis id="B964044EFF9A0F57FBA2FEAF078A3F07" box="[1056,1266,266,292]" italics="true" pageId="10" pageNumber="154">P. subcoronulatum</emphasis>
|
||
f.
|
||
<emphasis id="B964044EFF9A0F57FA91FEAF062E3F07" box="[1299,1366,267,292]" italics="true" pageId="10" pageNumber="154">majus</emphasis>
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName id="4C10A3DFFF9A0F57FA12FEAF02C13F6B" class="Conjugatophyceae" family="Desmidiaceae" genus="Pleurotaenium" kingdom="Plantae" order="Zygnematales" pageId="10" pageNumber="154" phylum="Charophyta" rank="variety" species="subcoronulatum" variety="major">
|
||
<emphasis id="B964044EFF9A0F57FA12FEAF02453F6B" italics="true" pageId="10" pageNumber="154">D. subcoronulatum</emphasis>
|
||
var.
|
||
<emphasis id="B964044EFF9A0F57FEF4FE8B02C13F6B" box="[374,441,303,328]" italics="true" pageId="10" pageNumber="154">major</emphasis>
|
||
</taxonomicName>
|
||
should be regarded as a basionym and synonym, respectively. The width of the cells and the basal swelling are distinct morphological characteristics which differentiate the proposed
|
||
<taxonomicName id="4C10A3DFFF9A0F57FB16FEF606663F4F" box="[1172,1310,338,364]" pageId="10" pageNumber="154" rank="variety" variety="from">variety from</taxonomicName>
|
||
the
|
||
<typeStatus id="54AB66FEFF9A0F57FACFFEF706053F4E" box="[1357,1405,339,365]" pageId="10" pageNumber="154">type</typeStatus>
|
||
and other infraspecific taxa.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |