268 lines
34 KiB
XML
268 lines
34 KiB
XML
<document ID-DOI="http://dx.doi.org/10.5091/plecevo.106779" ID-Pensoft-Pub="2032-3921-1-88" ID-Pensoft-UUID="5FDDA00880C4572AA510EC5EF7F079C4" ModsDocID="2032-3921-157-1-88" checkinTime="1708507253313" checkinUser="pensoft" docAuthor="Taylor, Jonathan C., Cocquyt, Christine & Walsh, Gina" docDate="2024" docId="DEF7AFCB4B1255FC84622EB42B7DD27B" docLanguage="en" docName="PlantEcolEvol 157(1): 88-99" docOrigin="Plant Ecology and Evolution 157 (1)" docPubDate="2024-02-21" docSource="http://dx.doi.org/10.5091/plecevo.106779" docTitle="Eunotia globicephala J. C. Taylor, Cocquyt & G. Walsh 2024, sp. nov." docType="treatment" docVersion="1" id="5FDDA00880C4572AA510EC5EF7F079C4" lastPageNumber="88" masterDocId="5FDDA00880C4572AA510EC5EF7F079C4" masterDocTitle="Tropical African diatoms from the Eunotia asterionelloides (Bacillariophyta) species complex, with descriptions of new species" masterLastPageNumber="99" masterPageNumber="88" pageNumber="88" updateTime="1708507253313" updateUser="pensoft">
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<mods:titleInfo id="66817633E4887D61B86AB5ECD6E61C8D">
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<mods:title id="B16337CFB80B36C52506566DD3D63E34">Tropical African diatoms from the Eunotia asterionelloides (Bacillariophyta) species complex, with descriptions of new species</mods:title>
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<mods:name id="A120ADEB432A114D4894D40EA5378A35" type="personal">
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<mods:namePart id="F1E7055558529FF73B2F8CF9C8F69EB7">Taylor, Jonathan C.</mods:namePart>
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<mods:nameIdentifier id="D171C6EE281464A1823EA7ADA993F81B" type="ORCID">https://orcid.org/0000-0003-2717-3246</mods:nameIdentifier>
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<mods:affiliation id="CE01EDA9ABB91FDB6550880F5E90218E">Unit for Environmental Science and Management, North-West University, Potchefstroom, South Africa & South African Institute for Aquatic Biodiversity (SAIAB), South Africa</mods:affiliation>
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<mods:nameIdentifier id="AADC5F0FD215E47946662C9F03A73A30" type="email">jonathan.taylor@nwu.ac.za</mods:nameIdentifier>
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<mods:roleTerm id="E1DAF700404D69B4AED0F3E4C84844BB">Author</mods:roleTerm>
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<mods:namePart id="BC430DAD447E2FD3E8BDDA42D09881D5">Cocquyt, Christine</mods:namePart>
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<mods:nameIdentifier id="F7A601CDEA8337AB66692E5FA675DDF8" type="ORCID">https://orcid.org/0000-0003-2717-3246</mods:nameIdentifier>
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<mods:affiliation id="4BDB53A1B0B54AE9DDD3315A56DFF945">Meise Botanic Garden, Research Department, Belgium</mods:affiliation>
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<mods:name id="CC65FA1FEC7A215F4ECD1AF9B0754EAE" type="personal">
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<mods:namePart id="4455C35288372D7687C236553E9BFF45">Walsh, Gina</mods:namePart>
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<mods:nameIdentifier id="D3F3D52037900F813124A67E335A8459" type="ORCID">https://orcid.org/0000-0002-6859-4568</mods:nameIdentifier>
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<mods:affiliation id="FBF87A9F785DBD2FB1F4B017E9130263">University of the Witwatersrand, School of Animal Plant and Environmental Sciences, Johannesburg, South Africa & Flora, Fauna & Man Ecological Services Ltd., British Virgin Islands</mods:affiliation>
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<mods:title id="1ADFE19C4D973C8D5E71BBB8E0BE20C8">Plant Ecology and Evolution</mods:title>
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<mods:part id="B8561C31421A64B0DE989B26393B38FA">
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<mods:date id="58E3BC2B7CE1532565CF32A8539CD1E7">2024</mods:date>
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<mods:number id="D6AFF0C8131D14AAB87E34AF202C0BB0">2024-02-21</mods:number>
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<mods:start id="22E2B3CFF866D7E5B3F494472E381666">88</mods:start>
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<mods:identifier id="B91ED4854A00FCC6143AC44676506EC2" type="DOI">http://dx.doi.org/10.5091/plecevo.106779</mods:identifier>
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<treatment id="DEF7AFCB4B1255FC84622EB42B7DD27B" LSID="urn:lsid:plazi:treatment:DEF7AFCB4B1255FC84622EB42B7DD27B" httpUri="http://treatment.plazi.org/id/DEF7AFCB4B1255FC84622EB42B7DD27B" lastPageNumber="88" pageId="0" pageNumber="88">
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<subSubSection id="5E66EADFEF8225779CAF6D71436255C8" pageId="0" pageNumber="88" type="nomenclature">
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<paragraph id="CDF5B51DBC0709371E95106FE951E627" pageId="0" pageNumber="88">
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<taxonomicName id="4CAD3BB8A8AC15B5115FE1C343AC8A94" LSID="DEF7AFCB-4B12-55FC-8462-2EB42B7DD27B" authority="J. C. Taylor, Cocquyt & G. Walsh" authorityName="J. C. Taylor, Cocquyt & G. Walsh" authorityYear="2024" class="Bacillariophyceae" family="Eunotiaceae" genus="Eunotia" higherTaxonomySource="treatment-meta" kingdom="Animalia" lsidName="Eunotia globicephala" order="Eunotiales" pageId="0" pageNumber="88" phylum="Bacillariophyta" rank="species" species="globicephala" status="sp. nov.">Eunotia globicephala J.C.Taylor, Cocquyt & G.Walsh</taxonomicName>
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<taxonomicNameLabel id="1038E8E3B6D032856D06E93A35FCDD4B" pageId="0" pageNumber="88">sp. nov.</taxonomicNameLabel>
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</paragraph>
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</subSubSection>
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<subSubSection id="A993351A061EAD5B95E53CF5D887D4D9" pageId="0" pageNumber="88" type="description">
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<paragraph id="5A4E798CA1F847C65C01D47016AE807F" pageId="0" pageNumber="88">
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<figureCitation id="512A3259B2734E5A1821BF9828DD5F41" captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Eunotia globicephala sp. nov., LM from type material, sample 13 - 335. Type represented by Fig. 5 F. A - M. Size diminution series, valve view. N - O. Girdle view. Eunotia tukanorum, LM from sample CCA 1847. P - S. Diminution series, valve view. T - U. Girdle view. Scale bar = 10 µm." figureDoi="10.5091/plecevo.106779.figure5" httpUri="https://binary.pensoft.net/fig/979698" pageId="0" pageNumber="88">Figs 5</figureCitation>
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<figureCitation id="2338197121153E8679D16EA7A9305416" captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Eunotia globicephala sp. nov., SEM from type material, sample 13 - 335. A. External view of valve of smaller cell, no marginal spines present. B. External view of valve of large cell, flexed 90 ° around the apical axis. C. External view of dorsal margin and apices, note the marginal spines and open copulae. D. External view of the ventral mantle showing the position of the raphe (arrowhead). E. External view of mid-valve showing the conical marginal spines and areolae occluded externally. F. Internal view of the valve apex showing helictoglossa and rimoportula (arrowhead) located very close to the ventral margin. Scale bars = 2 µm." figureDoi="10.5091/plecevo.106779.figure6" httpUri="https://binary.pensoft.net/fig/979699" pageId="0" pageNumber="88">, 6</figureCitation>
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</paragraph>
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</subSubSection>
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<subSubSection id="81F1C5ECB91A56ACCEF79BDC4A1F3A28" pageId="0" pageNumber="88" type="materials_examined">
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<paragraph id="DB27A8CB7D1537F686EF73B57161E392" pageId="0" pageNumber="88">
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<typeStatus id="C3C519865015C76A98154E7F24352A6B">Type</typeStatus>
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.
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</paragraph>
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<paragraph id="4A4A045ACEE6EFBF588D9D2BD4FC12EB" pageId="0" pageNumber="88">
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<materialsCitation id="A68023FC2573D2517A5C5C86C1A4FAE0" collectingDate="2024-01-01" collectingDateMax="2024-12-31" collectingDateMin="2024-01-01" country="REPUBLIC OF THE CONGO" county="Kouilou River" latitude="-4.327194" location="Confluence" longLatPrecision="1" longitude="11.866944" municipality="Lake Nanga" specimenCount="1" typeStatus="holotype">
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<collectingCountry id="F6BFB4BB2AAE56D956E4A5E7CC2982B3" name="Republic of the Congo">REPUBLIC OF THE CONGO</collectingCountry>
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•
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<location id="2659E81801CB546D5C19B109314DDFBE" LSID="urn:lsid:plazi:treatment:DEF7AFCB4B1255FC84622EB42B7DD27B:2659E81801CB546D5C19B109314DDFBE" country="REPUBLIC OF THE CONGO" county="Kouilou River" latitude="-4.327194" longLatPrecision="1" longitude="11.866944" municipality="Lake Nanga" name="Confluence">Confluence</location>
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of outflow from
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<collectingMunicipality id="9CADA250D8BE4269489A5D62E436C820">Lake Nanga</collectingMunicipality>
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and the
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<collectingCounty id="E71DDD6BA609B2BFACA32BFC3CA41765">Kouilou River</collectingCounty>
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;
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<geoCoordinate id="6F2868EEA3879430CA2250C0EF465509" degrees="4" direction="south" minutes="19" orientation="latitude" precision="1" seconds="37.9" value="-4.327194">
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4°19
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<normalizedToken id="6B2EA248E4536AC74AD5BE44DC3292D1" originalValue="’37.9”">'37.9"</normalizedToken>
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S
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</geoCoordinate>
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,
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<geoCoordinate id="A15B90C5540BEB33CF7AEC190B774CA2" degrees="11" direction="east" minutes="52" orientation="longitude" precision="1" seconds="01.0" value="11.866944">
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11°52
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<normalizedToken id="4C0A981B1226953E51648F088C4E48E3" originalValue="’01.0”">'01.0"</normalizedToken>
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E
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</geoCoordinate>
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; sample 13-335;
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<typeStatus id="144F9A308DF5852EDE0938C0709BE70C" type="holotype">holotype</typeStatus>
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: slide SANDC-13-335 (SANDC), the valve representing the type is illustrated in Fig.
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<figureCitation id="91A0AB116ECC4C53DA16BC4D92FD61EF" captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Eunotia globicephala sp. nov., LM from type material, sample 13 - 335. Type represented by Fig. 5 F. A - M. Size diminution series, valve view. N - O. Girdle view. Eunotia tukanorum, LM from sample CCA 1847. P - S. Diminution series, valve view. T - U. Girdle view. Scale bar = 10 µm." figureDoi="10.5091/plecevo.106779.figure5" httpUri="https://binary.pensoft.net/fig/979698" pageId="0" pageNumber="88">5F</figureCitation>
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;
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<typeStatus id="4A39820A0FA481388BA736EFC719F83D" type="isotype">isotype</typeStatus>
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: slide BR 4756 (BR)
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</materialsCitation>
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||
.
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</paragraph>
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</subSubSection>
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<subSubSection id="DAF819F73B3E967E5380423AD2893A57" pageId="0" pageNumber="88" type="description">
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<paragraph id="310CC6359CD9DB04FD80720B1471694C" pageId="0" pageNumber="88">LM description.</paragraph>
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<paragraph id="9AC99D90A6189043007E6A65F18D1090" pageId="0" pageNumber="88">
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Valves linear, arcuate, morphologically variable over cell cycle. Ventral margins convex, dorsal margins concave. Apices distinctly capitate in large cells, subcapitate in smaller cells. Apices rostrate to weakly cordiform, strongly asymmetrical in larger cells, expanded ventrally, slightly indented in larger cells forming a shallow cleft. Cells planar to highly flexed round the apical axis, flexing may reach 90° (Fig.
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<figureCitation id="68DA79E451993FF50FC2F40330446898" captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Eunotia globicephala sp. nov., LM from type material, sample 13 - 335. Type represented by Fig. 5 F. A - M. Size diminution series, valve view. N - O. Girdle view. Eunotia tukanorum, LM from sample CCA 1847. P - S. Diminution series, valve view. T - U. Girdle view. Scale bar = 10 µm." figureDoi="10.5091/plecevo.106779.figure5" httpUri="https://binary.pensoft.net/fig/979698" pageId="0" pageNumber="88">5G</figureCitation>
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). Terminal nodule barely visible. Cells weakly heteropolar in girdle view, most often exhibiting flexing around the apical axis. Cells constricted mid-valve. Valve length 25-40
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<normalizedToken id="7011A1CA22D03CB2D5F3912F158FEB24" originalValue="µm">µm</normalizedToken>
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, width 1.0-2.5
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<normalizedToken id="9BF9222461C6C86A4AE54F08AB2A4933" originalValue="µm">µm</normalizedToken>
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in the middle, and 3.0-4.5
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<normalizedToken id="397189A693A4060C3306AC1581C7E59E" originalValue="µm">µm</normalizedToken>
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at the poles. Striae visible under LM, 15-22 in 10
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<normalizedToken id="7A2CDE184650F03FB209397D9EC51DF4" originalValue="µm">µm</normalizedToken>
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.
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</paragraph>
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<caption id="0296D7A3CFA857D48FEB8CF16C3D9B4A" doi="10.5091/plecevo.106779.figure5" httpUri="https://binary.pensoft.net/fig/979698" pageId="0" pageNumber="88" start="Figure 5" startId="F5">
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<paragraph id="2E0E6F761E6CBE440CA1FE39FC2ADFBC" pageId="0" pageNumber="88">
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<emphasis id="EF1296FC627F75EFD3BF3DCE1D117141" bold="true" pageId="0" pageNumber="88">Figure 5.</emphasis>
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<taxonomicName id="FB161B5E40AABC2B5407B8AA8793C3B8" authorityName="J. C. Taylor, Cocquyt & G. Walsh" authorityYear="2024" class="Bacillariophyceae" family="Eunotiaceae" genus="Eunotia" kingdom="Animalia" lsidName="Eunotia globicephala" order="Diptera" pageId="0" pageNumber="88" phylum="Bacillariophyta" rank="species" species="globicephala">
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<emphasis id="4894350AB459412EE7FDD5662E9FCEA8" italics="true" pageId="0" pageNumber="88">Eunotia globicephala</emphasis>
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</taxonomicName>
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sp. nov., LM from type material, sample 13-335. Type represented by Fig.
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<figureCitation id="B29611C936CAD854DFFB3BF7359A966C" captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Eunotia globicephala sp. nov., LM from type material, sample 13 - 335. Type represented by Fig. 5 F. A - M. Size diminution series, valve view. N - O. Girdle view. Eunotia tukanorum, LM from sample CCA 1847. P - S. Diminution series, valve view. T - U. Girdle view. Scale bar = 10 µm." figureDoi="10.5091/plecevo.106779.figure5" httpUri="https://binary.pensoft.net/fig/979698" pageId="0" pageNumber="88">5F</figureCitation>
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||
.
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||
<emphasis id="301413CF6244A37DEAE8B9316F4E8220" bold="true" pageId="0" pageNumber="88">A</emphasis>
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-
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<emphasis id="446F914EBB0B3D4AE6E2795BBF46F228" bold="true" pageId="0" pageNumber="88">M</emphasis>
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. Size diminution series, valve view.
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<emphasis id="C5B28DD13F653DD2A51F35F4011B15EC" bold="true" pageId="0" pageNumber="88">N</emphasis>
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-
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<emphasis id="33EB168E4250710F39B2097ACE827E32" bold="true" pageId="0" pageNumber="88">O</emphasis>
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. Girdle view.
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<taxonomicName id="B7B1874965DAF32C79826AF3A317F173" class="Bacillariophyceae" family="Eunotiaceae" genus="Eunotia" kingdom="Animalia" lsidName="Eunotia tukanorum" order="Diptera" pageId="0" pageNumber="88" phylum="Bacillariophyta" rank="species" species="tukanorum">
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<emphasis id="6914F8BE7CC4F1C711C9F688904CEA23" italics="true" pageId="0" pageNumber="88">Eunotia tukanorum</emphasis>
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</taxonomicName>
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, LM from sample CCA 1847.
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<emphasis id="17DEE6BBFEFAE7B239530BEB6401CABF" bold="true" pageId="0" pageNumber="88">P</emphasis>
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-
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<emphasis id="12875F678580F44096E6B711502ADFA3" bold="true" pageId="0" pageNumber="88">S</emphasis>
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. Diminution series, valve view.
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<emphasis id="64ED2A950E1E024547D054C8985BFB1C" bold="true" pageId="0" pageNumber="88">T</emphasis>
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||
-
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<emphasis id="0EBF59EAB6051931467379C01C66B35C" bold="true" pageId="0" pageNumber="88">U</emphasis>
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. Girdle view. Scale bar = 10
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<normalizedToken id="42600216F54C2F1BA275B001CD7EDBFB" originalValue="µm">µm</normalizedToken>
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.
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</paragraph>
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</caption>
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</subSubSection>
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<subSubSection id="6CA676BE31F856DE84252B827388843E" pageId="0" pageNumber="88" type="description">
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<paragraph id="3F6BECE8DB66A3B287A0AC0BC95F7999" pageId="0" pageNumber="88">SEM description.</paragraph>
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<paragraph id="FA49803DE5B1B16F19AB585B32FBE734" pageId="0" pageNumber="88">
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Striae uniseriate externally and internally, composed of round areolae, occluded externally by hymenes. Striae continue onto valve mantle near the apices, becoming discontinuous close to the apices (Fig.
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<figureCitation id="A6AC0403C218D5F9BF64BBDD28BA3B6D" captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Eunotia globicephala sp. nov., SEM from type material, sample 13 - 335. A. External view of valve of smaller cell, no marginal spines present. B. External view of valve of large cell, flexed 90 ° around the apical axis. C. External view of dorsal margin and apices, note the marginal spines and open copulae. D. External view of the ventral mantle showing the position of the raphe (arrowhead). E. External view of mid-valve showing the conical marginal spines and areolae occluded externally. F. Internal view of the valve apex showing helictoglossa and rimoportula (arrowhead) located very close to the ventral margin. Scale bars = 2 µm." figureDoi="10.5091/plecevo.106779.figure6" httpUri="https://binary.pensoft.net/fig/979699" pageId="0" pageNumber="88">6F</figureCitation>
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). Striae interrupted externally at the margin by a slightly thickened silica ridge. Striae evenly spaced, parallel at the centre of the valve becoming radial at the apices (Fig.
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<figureCitation id="7FBF6AF1471564BC99A38DC603C4DEB3" captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Eunotia globicephala sp. nov., SEM from type material, sample 13 - 335. A. External view of valve of smaller cell, no marginal spines present. B. External view of valve of large cell, flexed 90 ° around the apical axis. C. External view of dorsal margin and apices, note the marginal spines and open copulae. D. External view of the ventral mantle showing the position of the raphe (arrowhead). E. External view of mid-valve showing the conical marginal spines and areolae occluded externally. F. Internal view of the valve apex showing helictoglossa and rimoportula (arrowhead) located very close to the ventral margin. Scale bars = 2 µm." figureDoi="10.5091/plecevo.106779.figure6" httpUri="https://binary.pensoft.net/fig/979699" pageId="0" pageNumber="88">6A, B</figureCitation>
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). Raphe slits clearly visible externally and internally, extending onto the valve face terminating very close to the valve apices (Fig.
|
||
<figureCitation id="8488CD7946252281E16508EF984E5F5E" captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Eunotia globicephala sp. nov., SEM from type material, sample 13 - 335. A. External view of valve of smaller cell, no marginal spines present. B. External view of valve of large cell, flexed 90 ° around the apical axis. C. External view of dorsal margin and apices, note the marginal spines and open copulae. D. External view of the ventral mantle showing the position of the raphe (arrowhead). E. External view of mid-valve showing the conical marginal spines and areolae occluded externally. F. Internal view of the valve apex showing helictoglossa and rimoportula (arrowhead) located very close to the ventral margin. Scale bars = 2 µm." figureDoi="10.5091/plecevo.106779.figure6" httpUri="https://binary.pensoft.net/fig/979699" pageId="0" pageNumber="88">6D</figureCitation>
|
||
). Valve mantle shallow, at 90° to the valve face (Fig.
|
||
<figureCitation id="A379336AD94150D4A138F1B9480EDE97" captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Eunotia globicephala sp. nov., SEM from type material, sample 13 - 335. A. External view of valve of smaller cell, no marginal spines present. B. External view of valve of large cell, flexed 90 ° around the apical axis. C. External view of dorsal margin and apices, note the marginal spines and open copulae. D. External view of the ventral mantle showing the position of the raphe (arrowhead). E. External view of mid-valve showing the conical marginal spines and areolae occluded externally. F. Internal view of the valve apex showing helictoglossa and rimoportula (arrowhead) located very close to the ventral margin. Scale bars = 2 µm." figureDoi="10.5091/plecevo.106779.figure6" httpUri="https://binary.pensoft.net/fig/979699" pageId="0" pageNumber="88">6E</figureCitation>
|
||
). Conical spines present at valve face/mantle junction in larger cells (Fig.
|
||
<figureCitation id="CEADC53BD78C97507C04A8F33270D04C" captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Eunotia globicephala sp. nov., SEM from type material, sample 13 - 335. A. External view of valve of smaller cell, no marginal spines present. B. External view of valve of large cell, flexed 90 ° around the apical axis. C. External view of dorsal margin and apices, note the marginal spines and open copulae. D. External view of the ventral mantle showing the position of the raphe (arrowhead). E. External view of mid-valve showing the conical marginal spines and areolae occluded externally. F. Internal view of the valve apex showing helictoglossa and rimoportula (arrowhead) located very close to the ventral margin. Scale bars = 2 µm." figureDoi="10.5091/plecevo.106779.figure6" httpUri="https://binary.pensoft.net/fig/979699" pageId="0" pageNumber="88">6C, E</figureCitation>
|
||
), absent in smaller cells (Fig.
|
||
<figureCitation id="3C4C887B8EF4C26749CBDDF27A83A56D" captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Eunotia globicephala sp. nov., SEM from type material, sample 13 - 335. A. External view of valve of smaller cell, no marginal spines present. B. External view of valve of large cell, flexed 90 ° around the apical axis. C. External view of dorsal margin and apices, note the marginal spines and open copulae. D. External view of the ventral mantle showing the position of the raphe (arrowhead). E. External view of mid-valve showing the conical marginal spines and areolae occluded externally. F. Internal view of the valve apex showing helictoglossa and rimoportula (arrowhead) located very close to the ventral margin. Scale bars = 2 µm." figureDoi="10.5091/plecevo.106779.figure6" httpUri="https://binary.pensoft.net/fig/979699" pageId="0" pageNumber="88">6A</figureCitation>
|
||
). Internally, terminal raphe branches terminating onto small but well-defined helictoglossae (Fig.
|
||
<figureCitation id="52B0F23A16C6E8921321CD2FF4ACE4E6" captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Eunotia globicephala sp. nov., SEM from type material, sample 13 - 335. A. External view of valve of smaller cell, no marginal spines present. B. External view of valve of large cell, flexed 90 ° around the apical axis. C. External view of dorsal margin and apices, note the marginal spines and open copulae. D. External view of the ventral mantle showing the position of the raphe (arrowhead). E. External view of mid-valve showing the conical marginal spines and areolae occluded externally. F. Internal view of the valve apex showing helictoglossa and rimoportula (arrowhead) located very close to the ventral margin. Scale bars = 2 µm." figureDoi="10.5091/plecevo.106779.figure6" httpUri="https://binary.pensoft.net/fig/979699" pageId="0" pageNumber="88">6D</figureCitation>
|
||
). Girdle composed of several open, perforated copulae, bearing one row of occluded areolae (Fig.
|
||
<figureCitation id="445A697B4D8507E67C7E7C32F0938D15" captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Eunotia globicephala sp. nov., SEM from type material, sample 13 - 335. A. External view of valve of smaller cell, no marginal spines present. B. External view of valve of large cell, flexed 90 ° around the apical axis. C. External view of dorsal margin and apices, note the marginal spines and open copulae. D. External view of the ventral mantle showing the position of the raphe (arrowhead). E. External view of mid-valve showing the conical marginal spines and areolae occluded externally. F. Internal view of the valve apex showing helictoglossa and rimoportula (arrowhead) located very close to the ventral margin. Scale bars = 2 µm." figureDoi="10.5091/plecevo.106779.figure6" httpUri="https://binary.pensoft.net/fig/979699" pageId="0" pageNumber="88">6C</figureCitation>
|
||
). One rimoportula present, always located close to the terminal raphe ending at the ventral part of one of the apices (Fig.
|
||
<figureCitation id="2BD24AE3DA6D978902B00E953DDD54B5" captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Eunotia globicephala sp. nov., SEM from type material, sample 13 - 335. A. External view of valve of smaller cell, no marginal spines present. B. External view of valve of large cell, flexed 90 ° around the apical axis. C. External view of dorsal margin and apices, note the marginal spines and open copulae. D. External view of the ventral mantle showing the position of the raphe (arrowhead). E. External view of mid-valve showing the conical marginal spines and areolae occluded externally. F. Internal view of the valve apex showing helictoglossa and rimoportula (arrowhead) located very close to the ventral margin. Scale bars = 2 µm." figureDoi="10.5091/plecevo.106779.figure6" httpUri="https://binary.pensoft.net/fig/979699" pageId="0" pageNumber="88">6F</figureCitation>
|
||
).
|
||
</paragraph>
|
||
<caption id="754C75CF2F06F2CE6206254644A9C7C1" doi="10.5091/plecevo.106779.figure6" httpUri="https://binary.pensoft.net/fig/979699" pageId="0" pageNumber="88" start="Figure 6" startId="F6">
|
||
<paragraph id="8BF41E45597FD97F82062368FC9F8777" pageId="0" pageNumber="88">
|
||
<emphasis id="35885DDA5DDDF0E967BC9AD43108F451" bold="true" pageId="0" pageNumber="88">Figure 6.</emphasis>
|
||
<taxonomicName id="4391B8CAFEEF6E0312FAA81DC523BD0F" authorityName="J. C. Taylor, Cocquyt & G. Walsh" authorityYear="2024" class="Bacillariophyceae" family="Eunotiaceae" genus="Eunotia" kingdom="Animalia" lsidName="Eunotia globicephala" order="Diptera" pageId="0" pageNumber="88" phylum="Bacillariophyta" rank="species" species="globicephala">
|
||
<emphasis id="621A5BAF21F8ECE8A0F5D0926765CDBF" italics="true" pageId="0" pageNumber="88">Eunotia globicephala</emphasis>
|
||
</taxonomicName>
|
||
sp. nov., SEM from type material, sample 13-335.
|
||
<emphasis id="45E651443462C73D02223124595FA019" bold="true" pageId="0" pageNumber="88">A</emphasis>
|
||
. External view of valve of smaller cell, no marginal spines present.
|
||
<emphasis id="50E782DD91C93529C75D5C03B567F222" bold="true" pageId="0" pageNumber="88">B</emphasis>
|
||
. External view of valve of large cell, flexed 90° around the apical axis.
|
||
<emphasis id="7124F2B2C55F8816A0E77B16B2063138" bold="true" pageId="0" pageNumber="88">C</emphasis>
|
||
. External view of dorsal margin and apices, note the marginal spines and open copulae.
|
||
<emphasis id="230A28140BB87F04BD034201F3FCF5A9" bold="true" pageId="0" pageNumber="88">D</emphasis>
|
||
. External view of the ventral mantle showing the position of the raphe (arrowhead).
|
||
<emphasis id="AE6C1EC08B98827A76DC761C5AEFF243" bold="true" pageId="0" pageNumber="88">E</emphasis>
|
||
. External view of mid-valve showing the conical marginal spines and areolae occluded externally.
|
||
<emphasis id="A94ED377B9E5E13A4BC335739E39F5C2" bold="true" pageId="0" pageNumber="88">F</emphasis>
|
||
. Internal view of the valve apex showing helictoglossa and rimoportula (arrowhead) located very close to the ventral margin. Scale bars = 2
|
||
<normalizedToken id="A4C724814A69627E68162E2A04F087D7" originalValue="µm">µm</normalizedToken>
|
||
.
|
||
</paragraph>
|
||
</caption>
|
||
</subSubSection>
|
||
<subSubSection id="A3A8AD1FE8C16AED5E509AF9E5AB2CA3" pageId="0" pageNumber="88" type="distribution">
|
||
<paragraph id="8401109037E8CEE55C6DA497769C110B" pageId="0" pageNumber="88">Distribution.</paragraph>
|
||
<paragraph id="69286442E2FF0E4F6DAC6B0677F1B3CA" pageId="0" pageNumber="88">At present only known from the type locality.</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="796E687A386C226E67770E96C1FAAEA7" pageId="0" pageNumber="88" type="ecology">
|
||
<paragraph id="E4130FAD59D8B0BBE4DF3757A93F1D75" pageId="0" pageNumber="88">Ecology.</paragraph>
|
||
<paragraph id="7DEBF22F458D47FE0833AA42B5B370AC" pageId="0" pageNumber="88">
|
||
This species was collected at the confluence of Lake Nanga and the Kouilou River. The site is situated in a seasonally flooded, forest-grassland-wetland mosaic in the Kouilou plain. Water at the time of sampling was slightly turbid with circumneutral pH (6.94), low conductivity (74.8
|
||
<normalizedToken id="4635F736C9656FA2C6424482B2667016" originalValue="µS">µS</normalizedToken>
|
||
.cm-¹), and moderate oxygen levels (53.8% saturation).
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="CE4F0F798E3B2AC49C97405741D7C97F" pageId="0" pageNumber="88" type="etymology">
|
||
<paragraph id="15E7CE8594DB1CC006467FCF0FC2D4A1" pageId="0" pageNumber="88">Etymology.</paragraph>
|
||
<paragraph id="D4F216140EBD01FCF03B32D9FC25C647" pageId="0" pageNumber="88">
|
||
The epithet
|
||
<taxonomicName id="763E092958EAF9D55BA94797A989DEB1" authorityName="J. C. Taylor, Cocquyt & G. Walsh" authorityYear="2024" class="Bacillariophyceae" family="Eunotiaceae" genus="Eunotia" kingdom="Animalia" lsidName="Eunotia globicephala" order="Diptera" pageId="0" pageNumber="88" phylum="Bacillariophyta" rank="species" species="globicephala">
|
||
<emphasis id="9AFDE4E51FFE5FF1EE649A7B19B22F0B" italics="true" pageId="0" pageNumber="88">Eunotia globicephala</emphasis>
|
||
</taxonomicName>
|
||
refers to the genus of the long-finned pilot whale [
|
||
<taxonomicName id="8FF16FB66F6E6607B08E0C8B724A5B6C" baseAuthorityName="Traill" baseAuthorityYear="1809" class="Mammalia" family="Delphinidae" genus="Globicephala" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="Globicephala melas" order="Artiodactyla" pageId="0" pageNumber="88" phylum="Chordata" rank="species" species="melas">
|
||
<emphasis id="5851576CE14D644C103114F563535756" italics="true" pageId="0" pageNumber="88">Globicephala melas</emphasis>
|
||
</taxonomicName>
|
||
(Traill, 1809)] as the apices of
|
||
<taxonomicName id="5872DEB0D0A7DE098B1D4B5BBD9BFFAC" authorityName="J. C. Taylor, Cocquyt & G. Walsh" authorityYear="2024" class="Bacillariophyceae" family="Eunotiaceae" genus="Eunotia" kingdom="Animalia" lsidName="Eunotia globicephala" order="Diptera" pageId="0" pageNumber="88" phylum="Bacillariophyta" rank="species" species="globicephala">
|
||
<emphasis id="291D578D15C104E7063B5486653A7B6B" italics="true" pageId="0" pageNumber="88">Eunotia globicephala</emphasis>
|
||
</taxonomicName>
|
||
bear a strong resemblance to the head and rostrum of this whale when seen in profile.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="FAE2C76FE85F133A55E62F13369BCECE" pageId="0" pageNumber="88" type="registration">
|
||
<paragraph id="3348435EC8BCE547B2F043C23018A39C" pageId="0" pageNumber="88">Registration.</paragraph>
|
||
<paragraph id="927C4868B16B10CCC4CAEAA2D969D93D" pageId="0" pageNumber="88">http://phycobank.org/104057</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="2EDCF5025952994D86A6787498FAF657" pageId="0" pageNumber="88" type="notes">
|
||
<paragraph id="BA9CFFDAB86AF6B9D7AE52775ED746A2" pageId="0" pageNumber="88">Notes.</paragraph>
|
||
<paragraph id="E3F1BE43F4D7F987E5F2E9342F5F9CCD" pageId="0" pageNumber="88">
|
||
In the
|
||
<taxonomicName id="266B0776FB526E89FFBD23D06905E719" authorityName="J. C. Taylor, Cocquyt & G. Walsh" authorityYear="2024" class="Bacillariophyceae" family="Eunotiaceae" genus="Eunotia" kingdom="Animalia" lsidName="Eunotia globicephala" order="Diptera" pageId="0" pageNumber="88" phylum="Bacillariophyta" rank="species" species="globicephala">
|
||
<emphasis id="6873CB09EDD068474FD0832CD1FC2A14" italics="true" pageId="0" pageNumber="88">Eunotia globicephala</emphasis>
|
||
</taxonomicName>
|
||
population observed from the Republic of the Congo cells can be planar to highly flexed around the apical axis, flexing may reach 90° (Figs
|
||
<figureCitation id="F33D3997806B2DC7E79E2E27B791E6E3" captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Eunotia globicephala sp. nov., LM from type material, sample 13 - 335. Type represented by Fig. 5 F. A - M. Size diminution series, valve view. N - O. Girdle view. Eunotia tukanorum, LM from sample CCA 1847. P - S. Diminution series, valve view. T - U. Girdle view. Scale bar = 10 µm." figureDoi="10.5091/plecevo.106779.figure5" httpUri="https://binary.pensoft.net/fig/979698" pageId="0" pageNumber="88">5G, N</figureCitation>
|
||
,
|
||
<figureCitation id="E44C04D924E34ECAE0B5341E7B8B8895" captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Eunotia globicephala sp. nov., SEM from type material, sample 13 - 335. A. External view of valve of smaller cell, no marginal spines present. B. External view of valve of large cell, flexed 90 ° around the apical axis. C. External view of dorsal margin and apices, note the marginal spines and open copulae. D. External view of the ventral mantle showing the position of the raphe (arrowhead). E. External view of mid-valve showing the conical marginal spines and areolae occluded externally. F. Internal view of the valve apex showing helictoglossa and rimoportula (arrowhead) located very close to the ventral margin. Scale bars = 2 µm." figureDoi="10.5091/plecevo.106779.figure6" httpUri="https://binary.pensoft.net/fig/979699" pageId="0" pageNumber="88">6B</figureCitation>
|
||
). Flexing was only observed in larger cells. This twisting may have an advantage for colony formation in that twisted cells will allow for the formation of rather more complex three-dimensional net-like structures rather than flattened colonies as are found in
|
||
<taxonomicName id="F40E1D38C87CD88B433DB7AC52113A9D" class="Bacillariophyceae" family="Fragilariaceae" genus="Asterionella" higherTaxonomySource="GBIF" kingdom="Chromista" lsidName="Asterionella formosa" order="Fragilariales" pageId="0" pageNumber="88" phylum="Bacillariophyta" rank="species" species="formosa">
|
||
<emphasis id="DB8F4763330C76124FDE7B87D7282334" italics="true" pageId="0" pageNumber="88">Asterionella formosa</emphasis>
|
||
</taxonomicName>
|
||
Hassall. As cell attachment usually is in the form of a mucus pad forming on the cell apex near to the ventral margin a cell twisted through 90° would provide an attachment site that would be perpendicular to that cell. A three-dimensional net-like structure could provide greater resistance to sinking and help maintain the position of the colony within the euphotic zone. Interestingly, the raphe never seems to be reduced in this taxon as is the case in
|
||
<taxonomicName id="8D36E665DF4B3B097A1B11B790A9926D" lsidName="E. zasuminensis" pageId="0" pageNumber="88" rank="species" species="zasuminensis">
|
||
<emphasis id="D0FB03E5A0EBCBE71D8D8EFC8DA2A029" italics="true" pageId="0" pageNumber="88">E. zasuminensis</emphasis>
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName id="C97FAE17CF33F8326978E62DBD2CF357" lsidName="E. magnaparva" pageId="0" pageNumber="88" rank="species" species="magnaparva">
|
||
<emphasis id="EE29234B9CCD46950F8A2BAD8E06D4F2" italics="true" pageId="0" pageNumber="88">E. magnaparva</emphasis>
|
||
</taxonomicName>
|
||
.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |