199 lines
39 KiB
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199 lines
39 KiB
XML
<document id="42EAD11DF9AE40247AFD253E2B935774" ID-CLB-Dataset="111190" ID-DOI="10.11646/phytotaxa.556.1.3" ID-GBIF-Dataset="ac636d2a-3e29-49a7-a37c-a44fb4e0e878" ID-ISSN="1179-3163" ID-Zenodo-Dep="6951967" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1659436889185" checkinUser="plazi" docAuthor="Stone, Jeffery R., Wilson, Mallory C. & Jovanovska, Elena" docDate="2022" docId="03AC87E94550FFADFF28FB74FE6D0B21" docLanguage="en" docName="phytotaxa.556.1.3.pdf" docOrigin="Phytotaxa 556 (1)" docSource="http://dx.doi.org/10.11646/phytotaxa.556.1.3" docStyle="DocumentStyle:96748F8F1B6C902996E134952A3A36B9.7:Phytotaxa.2014-.journal_article" docStyleId="96748F8F1B6C902996E134952A3A36B9" docStyleName="Phytotaxa.2014-.journal_article" docStyleVersion="7" docTitle="Afrocymbella gibba Stone & Wilson & Jovanovska 2022, sp. nov." docType="treatment" docVersion="5" lastPageNumber="36" masterDocId="FF95FF91455EFFA2FFA0FFC5FFAE0A04" masterDocTitle="The genus Afrocymbella (Bacillariophyceae) from lakes Malawi and Tanganyika, with description of new fossil and extant species" masterLastPageNumber="48" masterPageNumber="21" pageNumber="35" updateTime="1699362577316" updateUser="ExternalLinkService" zenodo-license-figures="UNSPECIFIED" zenodo-license-treatments="UNSPECIFIED">
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<mods:title id="8BA88D0C412B318224EA6B51AF45FC4E">The genus Afrocymbella (Bacillariophyceae) from lakes Malawi and Tanganyika, with description of new fossil and extant species</mods:title>
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<mods:name id="4948F63DD9B85EE556197CF029914DBC" type="personal">
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<mods:namePart id="510A465B6143D1B4B4BD50B4BB776CCE">Stone, Jeffery R.</mods:namePart>
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<mods:affiliation id="2F95B33B1F39063D3ADDB2CFFC5538A8">Indiana State University, Department of Earth and Environmental Systems, Terre Haute, Indiana, U. S. A. & jeffery. stone @ indstate. edu; https: // orcid. org / 0000 - 0002 - 1313 - 0643</mods:affiliation>
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<mods:nameIdentifier id="A963134FED1EFBC964EED33D91E7254B" type="email">jeffery.stone@indstate.edu</mods:nameIdentifier>
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<mods:namePart id="2E3B0D6D511C288CB7637BCE1059BF57">Wilson, Mallory C.</mods:namePart>
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<mods:nameIdentifier id="D1FA94DEE5E79546471D285B41BFC481" type="ORCID">0000-0002-2852-125X</mods:nameIdentifier>
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<mods:affiliation id="476FCF0D12313E65885B45913074616A">Indiana State University, Department of Earth and Environmental Systems, Terre Haute, Indiana, U. S. A. & mwilson 108 @ sycamores. indstate. edu; https: // orcid. org / 0000 - 0002 - 2852 - 125 X</mods:affiliation>
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<mods:nameIdentifier id="F7A37F18FCD3C266A71DAC7F4EBF0563" type="email">mwilson108@sycamores.indstate.edu</mods:nameIdentifier>
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<mods:namePart id="DFF08D6F3EF12048E764B4893E12F256">Jovanovska, Elena</mods:namePart>
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<mods:nameIdentifier id="510DDEA40DCC4D8C3F827CAE84A94B8C" type="ORCID">0000-0002-3413-3683</mods:nameIdentifier>
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<mods:affiliation id="5CB045CD733004A73DAE860C4EA92D57">Senckenberg Research Institute, Department of Paleoanthropology, Frankfurt am Main, Germany & jovanovska. eci @ gmail. com; https: // orcid. org / 0000 - 0002 - 3413 - 3683</mods:affiliation>
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<mods:nameIdentifier id="E2DA91B12E703F9F6E06D8129C6D94FB" type="email">jovanovska.eci@gmail.com</mods:nameIdentifier>
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<mods:title id="AAD870D37473D0B57E78FDBCB8C1145F">Phytotaxa</mods:title>
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<mods:date id="7DF376D298CC3E3B236A1E2CDC0C12EC">2022</mods:date>
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<mods:number id="711EBEA49809E2B3F40CBC958EF404F3">2022-08-01</mods:number>
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<mods:number id="47788ACCCDCEEBA3DCCDFBF447F27B10">556</mods:number>
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<mods:url id="D58E7FEFBFE48A494ED0C631EA255379">http://dx.doi.org/10.11646/phytotaxa.556.1.3</mods:url>
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<treatment id="03AC87E94550FFADFF28FB74FE6D0B21" ID-DOI="http://doi.org/10.5281/zenodo.6951991" ID-GBIF-Taxon="198475014" ID-Zenodo-Dep="6951991" LSID="urn:lsid:plazi:treatment:03AC87E94550FFADFF28FB74FE6D0B21" httpUri="http://treatment.plazi.org/id/03AC87E94550FFADFF28FB74FE6D0B21" lastPageId="15" lastPageNumber="36" pageId="14" pageNumber="35">
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<subSubSection id="C31F65744550FFACFF28FB74FC3E0EC8" box="[136,912,1201,1229]" pageId="14" pageNumber="35" type="nomenclature">
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<paragraph id="8BBA36FF4550FFACFF28FB74FC3E0EC8" blockId="14.[136,912,1201,1229]" box="[136,912,1201,1229]" pageId="14" pageNumber="35">
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<heading id="D0F281934550FFACFF28FB74FC3E0EC8" box="[136,912,1201,1229]" fontSize="11" level="2" pageId="14" pageNumber="35" reason="3">
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<emphasis id="B971EAED4550FFACFF28FB74FE680EC8" box="[136,454,1201,1228]" italics="true" pageId="14" pageNumber="35">
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<taxonomicName id="4C054D7C4550FFACFF28FB74FEC50EC8" authority="Stone & Wilson & Jovanovska, 2022" authorityName="Stone & Wilson & Jovanovska" authorityYear="2022" box="[136,363,1201,1228]" class="Bacillariophyceae" family="Cymbellaceae" genus="Afrocymbella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="14" pageNumber="35" phylum="Ochrophyta" rank="species" species="gibba" status="sp. nov.">
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<emphasis id="B971EAED4550FFACFF28FB74FEC50EC8" bold="true" box="[136,363,1201,1228]" italics="true" pageId="14" pageNumber="35">Afrocymbella gibba</emphasis>
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</taxonomicName>
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<taxonomicNameLabel id="A24257964550FFACFED1FB76FE680EC8" box="[369,454,1203,1228]" pageId="14" pageNumber="35" rank="species">sp. nov.</taxonomicNameLabel>
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</emphasis>
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(LM
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<figureCitation id="133E2A7A4550FFACFDA7FB77FD0C0EC9" box="[519,674,1202,1229]" captionStart="FIGURES 116–135" captionStartId="18.[136,243,2028,2050]" captionTargetBox="[159,1428,190,2004]" captionTargetId="figure-30@18.[159,1428,190,2004]" captionTargetPageId="18" captionText="FIGURES 116–135. Afrocymbella gibba sp. nov., LM valve views. Figs 116–120, 122, 124–127. Valves from the type material. Fig. 120. Holotype specimen. Scale bar = 10 μm." figureDoi="http://doi.org/10.5281/zenodo.6952015" httpUri="https://zenodo.org/record/6952015/files/figure.png" pageId="14" pageNumber="35">Figs 116–135</figureCitation>
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, SEM
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<figureCitation id="133E2A7A4550FFACFD4EFB77FC260EC8" box="[750,904,1202,1228]" captionStart-0="FIGURES 136–139" captionStart-1="FIGURES 140–143" captionStartId-0="19.[136,243,1673,1695]" captionStartId-1="20.[136,243,1520,1542]" captionTargetBox-0="[151,1435,190,1649]" captionTargetBox-1="[151,1435,190,1495]" captionTargetId-0="figure-18@19.[151,1435,190,1649]" captionTargetId-1="figure-30@20.[151,1435,190,1495]" captionTargetPageId-0="19" captionTargetPageId-1="20" captionText-0="FIGURES 136–139. Afrocymbella gibba sp. nov., SEM external valve views. 136. View of the whole valve showing raphe structure, slit-like areolae, and APF on footpole. 137. Detail footpole showing striae structure and distal raphe terminal fissure. 138. Detail of valve apex showing the slit-like areolae and APF of round poroids. 139. Detail of mid-valve showing dorsally deflected proximal raphe ends and slightly elongated stigmoid on the dorsal side of the large diamond-shaped central nodule. Scale bars = 10 μm (Fig. 136), 5 μm (Fig. 139), 2 μm (Figs 137–138)." captionText-1="FIGURES 140–143. Afrocymbella gibba sp. nov., SEM internal valve views. 140. View of the whole valve. 141. Detail of mid-valve showing proximal raphe ends covered by flap-like silica development and antler-like intermissio stigmoid. 142. Distal raphe fissures slightly raised into small helictoglossae. 143. Close view of distal raphe terminal fissure andAPF with knobby jointed ridge of silica. Scale bars = 20 μm (Fig. 140), 2 μm (Figs 141–143)." figureDoi-0="http://doi.org/10.5281/zenodo.6952017" figureDoi-1="http://doi.org/10.5281/zenodo.6952021" httpUri-0="https://zenodo.org/record/6952017/files/figure.png" httpUri-1="https://zenodo.org/record/6952021/files/figure.png" pageId="14" pageNumber="35">Figs 136–143</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="C31F65744550FFACFF28FB3CFCDB0D34" pageId="14" pageNumber="35" type="description">
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<paragraph id="8BBA36FF4550FFACFF28FB3CFCDB0D34" blockId="14.[136,1452,1273,2056]" pageId="14" pageNumber="35">
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<emphasis id="B971EAED4550FFACFF28FB3CFE960F17" bold="true" box="[136,312,1273,1299]" pageId="14" pageNumber="35">Description:—</emphasis>
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Valve length 52.5–93.0 μm, valve breadth 16.5–22.5 μm. Length to breadth ratio: 2.8–4.2. Valves distinctly dorsiventral and heteropolar, semirhomboid-lanceolate (
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<figureCitation id="133E2A7A4550FFACFCCFFADBFBA00F3C" box="[879,1038,1310,1336]" captionStart-0="FIGURES 116–135" captionStart-1="FIGURES 136–139" captionStart-2="FIGURES 140–143" captionStartId-0="18.[136,243,2028,2050]" captionStartId-1="19.[136,243,1673,1695]" captionStartId-2="20.[136,243,1520,1542]" captionTargetBox-0="[159,1428,190,2004]" captionTargetBox-1="[151,1435,190,1649]" captionTargetBox-2="[151,1435,190,1495]" captionTargetId-0="figure-30@18.[159,1428,190,2004]" captionTargetId-1="figure-18@19.[151,1435,190,1649]" captionTargetId-2="figure-30@20.[151,1435,190,1495]" captionTargetPageId-0="18" captionTargetPageId-1="19" captionTargetPageId-2="20" captionText-0="FIGURES 116–135. Afrocymbella gibba sp. nov., LM valve views. Figs 116–120, 122, 124–127. Valves from the type material. Fig. 120. Holotype specimen. Scale bar = 10 μm." captionText-1="FIGURES 136–139. Afrocymbella gibba sp. nov., SEM external valve views. 136. View of the whole valve showing raphe structure, slit-like areolae, and APF on footpole. 137. Detail footpole showing striae structure and distal raphe terminal fissure. 138. Detail of valve apex showing the slit-like areolae and APF of round poroids. 139. Detail of mid-valve showing dorsally deflected proximal raphe ends and slightly elongated stigmoid on the dorsal side of the large diamond-shaped central nodule. Scale bars = 10 μm (Fig. 136), 5 μm (Fig. 139), 2 μm (Figs 137–138)." captionText-2="FIGURES 140–143. Afrocymbella gibba sp. nov., SEM internal valve views. 140. View of the whole valve. 141. Detail of mid-valve showing proximal raphe ends covered by flap-like silica development and antler-like intermissio stigmoid. 142. Distal raphe fissures slightly raised into small helictoglossae. 143. Close view of distal raphe terminal fissure andAPF with knobby jointed ridge of silica. Scale bars = 20 μm (Fig. 140), 2 μm (Figs 141–143)." figureDoi-0="http://doi.org/10.5281/zenodo.6952015" figureDoi-1="http://doi.org/10.5281/zenodo.6952017" figureDoi-2="http://doi.org/10.5281/zenodo.6952021" httpUri-0="https://zenodo.org/record/6952015/files/figure.png" httpUri-1="https://zenodo.org/record/6952017/files/figure.png" httpUri-2="https://zenodo.org/record/6952021/files/figure.png" pageId="14" pageNumber="35">Figs 116–143</figureCitation>
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). Dorsal margin widely arched (
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<figureCitation id="133E2A7A4550FFACFADAFADBFF430F59" captionStart="FIGURES 116–135" captionStartId="18.[136,243,2028,2050]" captionTargetBox="[159,1428,190,2004]" captionTargetId="figure-30@18.[159,1428,190,2004]" captionTargetPageId="18" captionText="FIGURES 116–135. Afrocymbella gibba sp. nov., LM valve views. Figs 116–120, 122, 124–127. Valves from the type material. Fig. 120. Holotype specimen. Scale bar = 10 μm." figureDoi="http://doi.org/10.5281/zenodo.6952015" httpUri="https://zenodo.org/record/6952015/files/figure.png" pageId="14" pageNumber="35">Figs 116–135</figureCitation>
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). Ventral margin ranging from slightly to strongly tumescent, typically broad and spanning ½ – 2/3 length of valve, otherwise weakly convex (
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<figureCitation id="133E2A7A4550FFACFDA4FAA3FD0A0F85" box="[516,676,1382,1409]" captionStart="FIGURES 116–135" captionStartId="18.[136,243,2028,2050]" captionTargetBox="[159,1428,190,2004]" captionTargetId="figure-30@18.[159,1428,190,2004]" captionTargetPageId="18" captionText="FIGURES 116–135. Afrocymbella gibba sp. nov., LM valve views. Figs 116–120, 122, 124–127. Valves from the type material. Fig. 120. Holotype specimen. Scale bar = 10 μm." figureDoi="http://doi.org/10.5281/zenodo.6952015" httpUri="https://zenodo.org/record/6952015/files/figure.png" pageId="14" pageNumber="35">Figs 116–135</figureCitation>
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). APF of round poroids present at footpole (
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<figureCitation id="133E2A7A4550FFACFB3CFAA3FA930F84" box="[1180,1341,1382,1408]" captionStart="FIGURES 136–139" captionStartId="19.[136,243,1673,1695]" captionTargetBox="[151,1435,190,1649]" captionTargetId="figure-18@19.[151,1435,190,1649]" captionTargetPageId="19" captionText="FIGURES 136–139. Afrocymbella gibba sp. nov., SEM external valve views. 136. View of the whole valve showing raphe structure, slit-like areolae, and APF on footpole. 137. Detail footpole showing striae structure and distal raphe terminal fissure. 138. Detail of valve apex showing the slit-like areolae and APF of round poroids. 139. Detail of mid-valve showing dorsally deflected proximal raphe ends and slightly elongated stigmoid on the dorsal side of the large diamond-shaped central nodule. Scale bars = 10 μm (Fig. 136), 5 μm (Fig. 139), 2 μm (Figs 137–138)." figureDoi="http://doi.org/10.5281/zenodo.6952017" httpUri="https://zenodo.org/record/6952017/files/figure.png" pageId="14" pageNumber="35">Figs 136, 138</figureCitation>
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), covered internally by knobby jointed ridge of silica (
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<figureCitation id="133E2A7A4550FFACFDCCFA4FFD630FA0" box="[620,717,1418,1444]" captionStart="FIGURES 140–143" captionStartId="20.[136,243,1520,1542]" captionTargetBox="[151,1435,190,1495]" captionTargetId="figure-30@20.[151,1435,190,1495]" captionTargetPageId="20" captionText="FIGURES 140–143. Afrocymbella gibba sp. nov., SEM internal valve views. 140. View of the whole valve. 141. Detail of mid-valve showing proximal raphe ends covered by flap-like silica development and antler-like intermissio stigmoid. 142. Distal raphe fissures slightly raised into small helictoglossae. 143. Close view of distal raphe terminal fissure andAPF with knobby jointed ridge of silica. Scale bars = 20 μm (Fig. 140), 2 μm (Figs 141–143)." figureDoi="http://doi.org/10.5281/zenodo.6952021" httpUri="https://zenodo.org/record/6952021/files/figure.png" pageId="14" pageNumber="35">Fig. 143</figureCitation>
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). Valve apices narrowly rounded, with headpole becoming slightly rostrate in smaller specimens (
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<figureCitation id="133E2A7A4550FFACFE7FFA6BFDD00FCD" box="[479,638,1454,1481]" captionStart="FIGURES 116–135" captionStartId="18.[136,243,2028,2050]" captionTargetBox="[159,1428,190,2004]" captionTargetId="figure-30@18.[159,1428,190,2004]" captionTargetPageId="18" captionText="FIGURES 116–135. Afrocymbella gibba sp. nov., LM valve views. Figs 116–120, 122, 124–127. Valves from the type material. Fig. 120. Holotype specimen. Scale bar = 10 μm." figureDoi="http://doi.org/10.5281/zenodo.6952015" httpUri="https://zenodo.org/record/6952015/files/figure.png" pageId="14" pageNumber="35">Figs 116–135</figureCitation>
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); internally with small to indistinguishable pseudosepta (
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<figureCitation id="133E2A7A4550FFACFB5FFA6BFA310FCC" box="[1279,1439,1454,1480]" captionStart="FIGURES 140–143" captionStartId="20.[136,243,1520,1542]" captionTargetBox="[151,1435,190,1495]" captionTargetId="figure-30@20.[151,1435,190,1495]" captionTargetPageId="20" captionText="FIGURES 140–143. Afrocymbella gibba sp. nov., SEM internal valve views. 140. View of the whole valve. 141. Detail of mid-valve showing proximal raphe ends covered by flap-like silica development and antler-like intermissio stigmoid. 142. Distal raphe fissures slightly raised into small helictoglossae. 143. Close view of distal raphe terminal fissure andAPF with knobby jointed ridge of silica. Scale bars = 20 μm (Fig. 140), 2 μm (Figs 141–143)." figureDoi="http://doi.org/10.5281/zenodo.6952021" httpUri="https://zenodo.org/record/6952021/files/figure.png" pageId="14" pageNumber="35">Figs 142, 143</figureCitation>
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). Axial area narrow, curved, slightly ventrally displaced (
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<figureCitation id="133E2A7A4550FFACFCB3FA17FCD40FE8" box="[787,890,1490,1516]" captionStart="FIGURES 136–139" captionStartId="19.[136,243,1673,1695]" captionTargetBox="[151,1435,190,1649]" captionTargetId="figure-18@19.[151,1435,190,1649]" captionTargetPageId="19" captionText="FIGURES 136–139. Afrocymbella gibba sp. nov., SEM external valve views. 136. View of the whole valve showing raphe structure, slit-like areolae, and APF on footpole. 137. Detail footpole showing striae structure and distal raphe terminal fissure. 138. Detail of valve apex showing the slit-like areolae and APF of round poroids. 139. Detail of mid-valve showing dorsally deflected proximal raphe ends and slightly elongated stigmoid on the dorsal side of the large diamond-shaped central nodule. Scale bars = 10 μm (Fig. 136), 5 μm (Fig. 139), 2 μm (Figs 137–138)." figureDoi="http://doi.org/10.5281/zenodo.6952017" httpUri="https://zenodo.org/record/6952017/files/figure.png" pageId="14" pageNumber="35">Fig. 136</figureCitation>
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). Central area large, oval shaped, notably wider and more diamond-shaped on dorsal side (
|
||
<figureCitation id="133E2A7A4550FFACFDCFFA33FD7D0C14" box="[623,723,1526,1552]" captionStart="FIGURES 136–139" captionStartId="19.[136,243,1673,1695]" captionTargetBox="[151,1435,190,1649]" captionTargetId="figure-18@19.[151,1435,190,1649]" captionTargetPageId="19" captionText="FIGURES 136–139. Afrocymbella gibba sp. nov., SEM external valve views. 136. View of the whole valve showing raphe structure, slit-like areolae, and APF on footpole. 137. Detail footpole showing striae structure and distal raphe terminal fissure. 138. Detail of valve apex showing the slit-like areolae and APF of round poroids. 139. Detail of mid-valve showing dorsally deflected proximal raphe ends and slightly elongated stigmoid on the dorsal side of the large diamond-shaped central nodule. Scale bars = 10 μm (Fig. 136), 5 μm (Fig. 139), 2 μm (Figs 137–138)." figureDoi="http://doi.org/10.5281/zenodo.6952017" httpUri="https://zenodo.org/record/6952017/files/figure.png" pageId="14" pageNumber="35">Fig. 139</figureCitation>
|
||
). Prominent single (rarely 2) stigmoid present on dorsal side of central nodule (
|
||
<figureCitation id="133E2A7A4550FFACFE99F9DFFE350C30" box="[313,411,1562,1588]" captionStart="FIGURES 136–139" captionStartId="19.[136,243,1673,1695]" captionTargetBox="[151,1435,190,1649]" captionTargetId="figure-18@19.[151,1435,190,1649]" captionTargetPageId="19" captionText="FIGURES 136–139. Afrocymbella gibba sp. nov., SEM external valve views. 136. View of the whole valve showing raphe structure, slit-like areolae, and APF on footpole. 137. Detail footpole showing striae structure and distal raphe terminal fissure. 138. Detail of valve apex showing the slit-like areolae and APF of round poroids. 139. Detail of mid-valve showing dorsally deflected proximal raphe ends and slightly elongated stigmoid on the dorsal side of the large diamond-shaped central nodule. Scale bars = 10 μm (Fig. 136), 5 μm (Fig. 139), 2 μm (Figs 137–138)." figureDoi="http://doi.org/10.5281/zenodo.6952017" httpUri="https://zenodo.org/record/6952017/files/figure.png" pageId="14" pageNumber="35">Fig. 136</figureCitation>
|
||
), externally round to transapically elongated (
|
||
<figureCitation id="133E2A7A4550FFACFC05F9DFFBA90C30" box="[933,1031,1562,1588]" captionStart="FIGURES 136–139" captionStartId="19.[136,243,1673,1695]" captionTargetBox="[151,1435,190,1649]" captionTargetId="figure-18@19.[151,1435,190,1649]" captionTargetPageId="19" captionText="FIGURES 136–139. Afrocymbella gibba sp. nov., SEM external valve views. 136. View of the whole valve showing raphe structure, slit-like areolae, and APF on footpole. 137. Detail footpole showing striae structure and distal raphe terminal fissure. 138. Detail of valve apex showing the slit-like areolae and APF of round poroids. 139. Detail of mid-valve showing dorsally deflected proximal raphe ends and slightly elongated stigmoid on the dorsal side of the large diamond-shaped central nodule. Scale bars = 10 μm (Fig. 136), 5 μm (Fig. 139), 2 μm (Figs 137–138)." figureDoi="http://doi.org/10.5281/zenodo.6952017" httpUri="https://zenodo.org/record/6952017/files/figure.png" pageId="14" pageNumber="35">Fig. 139</figureCitation>
|
||
), while internally elongated slit (
|
||
<figureCitation id="133E2A7A4550FFACFADEF9DFFF1B0C5C" captionStart="FIGURES 140–143" captionStartId="20.[136,243,1520,1542]" captionTargetBox="[151,1435,190,1495]" captionTargetId="figure-30@20.[151,1435,190,1495]" captionTargetPageId="20" captionText="FIGURES 140–143. Afrocymbella gibba sp. nov., SEM internal valve views. 140. View of the whole valve. 141. Detail of mid-valve showing proximal raphe ends covered by flap-like silica development and antler-like intermissio stigmoid. 142. Distal raphe fissures slightly raised into small helictoglossae. 143. Close view of distal raphe terminal fissure andAPF with knobby jointed ridge of silica. Scale bars = 20 μm (Fig. 140), 2 μm (Figs 141–143)." figureDoi="http://doi.org/10.5281/zenodo.6952021" httpUri="https://zenodo.org/record/6952021/files/figure.png" pageId="14" pageNumber="35">Fig. 141</figureCitation>
|
||
). Raphe curved and slightly sinusoidal (
|
||
<figureCitation id="133E2A7A4550FFACFD2AF9FBFD5E0C5C" box="[650,752,1598,1624]" captionStart="FIGURES 136–139" captionStartId="19.[136,243,1673,1695]" captionTargetBox="[151,1435,190,1649]" captionTargetId="figure-18@19.[151,1435,190,1649]" captionTargetPageId="19" captionText="FIGURES 136–139. Afrocymbella gibba sp. nov., SEM external valve views. 136. View of the whole valve showing raphe structure, slit-like areolae, and APF on footpole. 137. Detail footpole showing striae structure and distal raphe terminal fissure. 138. Detail of valve apex showing the slit-like areolae and APF of round poroids. 139. Detail of mid-valve showing dorsally deflected proximal raphe ends and slightly elongated stigmoid on the dorsal side of the large diamond-shaped central nodule. Scale bars = 10 μm (Fig. 136), 5 μm (Fig. 139), 2 μm (Figs 137–138)." figureDoi="http://doi.org/10.5281/zenodo.6952017" httpUri="https://zenodo.org/record/6952017/files/figure.png" pageId="14" pageNumber="35">Fig. 136</figureCitation>
|
||
). External proximal raphe ends slightly expanded into small pores, dorsally deflected (
|
||
<figureCitation id="133E2A7A4550FFACFE07F9A7FDA60C78" box="[423,520,1634,1660]" captionStart="FIGURES 136–139" captionStartId="19.[136,243,1673,1695]" captionTargetBox="[151,1435,190,1649]" captionTargetId="figure-18@19.[151,1435,190,1649]" captionTargetPageId="19" captionText="FIGURES 136–139. Afrocymbella gibba sp. nov., SEM external valve views. 136. View of the whole valve showing raphe structure, slit-like areolae, and APF on footpole. 137. Detail footpole showing striae structure and distal raphe terminal fissure. 138. Detail of valve apex showing the slit-like areolae and APF of round poroids. 139. Detail of mid-valve showing dorsally deflected proximal raphe ends and slightly elongated stigmoid on the dorsal side of the large diamond-shaped central nodule. Scale bars = 10 μm (Fig. 136), 5 μm (Fig. 139), 2 μm (Figs 137–138)." figureDoi="http://doi.org/10.5281/zenodo.6952017" httpUri="https://zenodo.org/record/6952017/files/figure.png" pageId="14" pageNumber="35">Fig. 139</figureCitation>
|
||
). External distal raphe terminal fissures ventrally deflected (
|
||
<figureCitation id="133E2A7A4550FFACFB04F9A7FAED0C78" box="[1188,1347,1634,1660]" captionStart="FIGURES 136–139" captionStartId="19.[136,243,1673,1695]" captionTargetBox="[151,1435,190,1649]" captionTargetId="figure-18@19.[151,1435,190,1649]" captionTargetPageId="19" captionText="FIGURES 136–139. Afrocymbella gibba sp. nov., SEM external valve views. 136. View of the whole valve showing raphe structure, slit-like areolae, and APF on footpole. 137. Detail footpole showing striae structure and distal raphe terminal fissure. 138. Detail of valve apex showing the slit-like areolae and APF of round poroids. 139. Detail of mid-valve showing dorsally deflected proximal raphe ends and slightly elongated stigmoid on the dorsal side of the large diamond-shaped central nodule. Scale bars = 10 μm (Fig. 136), 5 μm (Fig. 139), 2 μm (Figs 137–138)." figureDoi="http://doi.org/10.5281/zenodo.6952017" httpUri="https://zenodo.org/record/6952017/files/figure.png" pageId="14" pageNumber="35">Figs 136–138</figureCitation>
|
||
). Internal proximal raphe ends covered by nodular or flap-like silica development formed by primary side of valve (
|
||
<figureCitation id="133E2A7A4550FFACFAE0F943FF1B0CC0" captionStart="FIGURES 140–143" captionStartId="20.[136,243,1520,1542]" captionTargetBox="[151,1435,190,1495]" captionTargetId="figure-30@20.[151,1435,190,1495]" captionTargetPageId="20" captionText="FIGURES 140–143. Afrocymbella gibba sp. nov., SEM internal valve views. 140. View of the whole valve. 141. Detail of mid-valve showing proximal raphe ends covered by flap-like silica development and antler-like intermissio stigmoid. 142. Distal raphe fissures slightly raised into small helictoglossae. 143. Close view of distal raphe terminal fissure andAPF with knobby jointed ridge of silica. Scale bars = 20 μm (Fig. 140), 2 μm (Figs 141–143)." figureDoi="http://doi.org/10.5281/zenodo.6952021" httpUri="https://zenodo.org/record/6952021/files/figure.png" pageId="14" pageNumber="35">Figs 140, 141</figureCitation>
|
||
). Internal distal raphe terminal fissures slightly elevated into small lobed helictoglossa at some distance from valve apices (
|
||
<figureCitation id="133E2A7A4550FFACFF7DF90BFE1A0CEC" box="[221,436,1742,1768]" captionStart="FIGURES 140–143" captionStartId="20.[136,243,1520,1542]" captionTargetBox="[151,1435,190,1495]" captionTargetId="figure-30@20.[151,1435,190,1495]" captionTargetPageId="20" captionText="FIGURES 140–143. Afrocymbella gibba sp. nov., SEM internal valve views. 140. View of the whole valve. 141. Detail of mid-valve showing proximal raphe ends covered by flap-like silica development and antler-like intermissio stigmoid. 142. Distal raphe fissures slightly raised into small helictoglossae. 143. Close view of distal raphe terminal fissure andAPF with knobby jointed ridge of silica. Scale bars = 20 μm (Fig. 140), 2 μm (Figs 141–143)." figureDoi="http://doi.org/10.5281/zenodo.6952021" httpUri="https://zenodo.org/record/6952021/files/figure.png" pageId="14" pageNumber="35">Figs 140, 142, 143</figureCitation>
|
||
). Striae radiate or radiate-curved, uninterruptedly continuing onto valve mantle (
|
||
<figureCitation id="133E2A7A4550FFACFA9DF90BFA300CEC" box="[1341,1438,1742,1768]" captionStart="FIGURES 136–139" captionStartId="19.[136,243,1673,1695]" captionTargetBox="[151,1435,190,1649]" captionTargetId="figure-18@19.[151,1435,190,1649]" captionTargetPageId="19" captionText="FIGURES 136–139. Afrocymbella gibba sp. nov., SEM external valve views. 136. View of the whole valve showing raphe structure, slit-like areolae, and APF on footpole. 137. Detail footpole showing striae structure and distal raphe terminal fissure. 138. Detail of valve apex showing the slit-like areolae and APF of round poroids. 139. Detail of mid-valve showing dorsally deflected proximal raphe ends and slightly elongated stigmoid on the dorsal side of the large diamond-shaped central nodule. Scale bars = 10 μm (Fig. 136), 5 μm (Fig. 139), 2 μm (Figs 137–138)." figureDoi="http://doi.org/10.5281/zenodo.6952017" httpUri="https://zenodo.org/record/6952017/files/figure.png" pageId="14" pageNumber="35">Fig. 136</figureCitation>
|
||
),
|
||
<quantity id="4CFD9B1A4550FFACFF28F937FF420D08" box="[136,236,1778,1805]" metricMagnitude="-1" metricUnit="m" metricValue="3.556" metricValueMax="3.81" metricValueMin="3.302" pageId="14" pageNumber="35" unit="in" value="14.0" valueMax="15.0" valueMin="13.0">13–15 in</quantity>
|
||
10 μm (counted dorsally at central area). External areolae slit-like poroids, appearing blocky in LM,
|
||
<quantity id="4CFD9B1A4550FFACFAC5F937FF300D34" metricMagnitude="-1" metricUnit="m" metricValue="4.318" metricValueMax="4.572" metricValueMin="4.064" pageId="14" pageNumber="35" unit="in" value="17.0" valueMax="18.0" valueMin="16.0">16–18 in</quantity>
|
||
10 μm. Internal areolae ellipsoid without velum (
|
||
<figureCitation id="133E2A7A4550FFACFD69F8D3FCC60D34" box="[713,872,1814,1840]" captionStart="FIGURES 140–143" captionStartId="20.[136,243,1520,1542]" captionTargetBox="[151,1435,190,1495]" captionTargetId="figure-30@20.[151,1435,190,1495]" captionTargetPageId="20" captionText="FIGURES 140–143. Afrocymbella gibba sp. nov., SEM internal valve views. 140. View of the whole valve. 141. Detail of mid-valve showing proximal raphe ends covered by flap-like silica development and antler-like intermissio stigmoid. 142. Distal raphe fissures slightly raised into small helictoglossae. 143. Close view of distal raphe terminal fissure andAPF with knobby jointed ridge of silica. Scale bars = 20 μm (Fig. 140), 2 μm (Figs 141–143)." figureDoi="http://doi.org/10.5281/zenodo.6952021" httpUri="https://zenodo.org/record/6952021/files/figure.png" pageId="14" pageNumber="35">Figs 140, 142</figureCitation>
|
||
).
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="C31F65744550FFACFF1DF8FFFB5B0DC5" pageId="14" pageNumber="35" type="materials_examined">
|
||
<paragraph id="8BBA36FF4550FFACFF1DF8FFFAC80D98" blockId="14.[136,1452,1273,2056]" pageId="14" pageNumber="35">
|
||
<emphasis id="B971EAED4550FFACFF1DF8FFFEB00D50" bold="true" box="[189,286,1850,1876]" pageId="14" pageNumber="35">Type:—</emphasis>
|
||
<materialsCitation id="3B6D3CA24550FFACFEBDF8FFFAC80D98" ID-GBIF-Occurrence="3874591302" collectingDate="2018-09-22" collectorName="E. Jovanovska" country="Malawi" elevation="469" latitude="-14.012055" location="Lake Malawi" longLatPrecision="1" longitude="34.850025" municipality="Chembe Bay" pageId="14" pageNumber="35" specimenCount="1" typeStatus="holotype">
|
||
<collectingCountry id="F312766F4550FFACFEBDF8FFFDE10D50" box="[285,591,1850,1876]" name="Malawi" pageId="14" pageNumber="35">REPUBLIC OF MALAWI</collectingCountry>
|
||
.
|
||
<location id="8EDA60244550FFACFDFAF8FFFD5F0D50" LSID="urn:lsid:plazi:treatment:03AC87E94550FFADFF28FB74FE6D0B21:8EDA60244550FFACFDFAF8FFFD5F0D50" box="[602,753,1850,1876]" country="Malawi" latitude="-14.012055" longLatPrecision="1" longitude="34.850025" municipality="Chembe Bay" name="Lake Malawi" pageId="14" pageNumber="35">Lake Malawi</location>
|
||
,
|
||
<collectingMunicipality id="6BDEAC854550FFACFD5DF8FFFC3E0D50" box="[765,912,1850,1876]" pageId="14" pageNumber="35">Chembe Bay</collectingMunicipality>
|
||
, at
|
||
<quantity id="4CFD9B1A4550FFACFC17F8FFFC510D50" box="[951,1023,1850,1876]" metricMagnitude="2" metricUnit="m" metricValue="4.6899999999999995" pageId="14" pageNumber="35" unit="m" value="469.0">
|
||
<elevation id="0028D1CC4550FFACFC17F8FFFC510D50" box="[951,1023,1850,1876]" metricMagnitude="2" metricUnit="m" metricValue="4.6899999999999995" pageId="14" pageNumber="35" unit="m" value="469.0">469 m</elevation>
|
||
</quantity>
|
||
elevation, rock scrape,
|
||
<geoCoordinate id="EE3150384550FFACFAAAF8FFFA020D50" box="[1290,1452,1850,1876]" degrees="14" direction="south" minutes="00" orientation="latitude" pageId="14" pageNumber="35" precision="1" seconds="43.4" value="-14.012055">14°00’43.4” S</geoCoordinate>
|
||
<geoCoordinate id="EE3150384550FFACFF28F89BFE800D7C" box="[136,302,1886,1913]" degrees="34" direction="east" minutes="51" orientation="longitude" pageId="14" pageNumber="35" precision="1" seconds="00.1" value="34.850025">34°51’00.1” E</geoCoordinate>
|
||
,
|
||
<emphasis id="B971EAED4550FFACFE9DF89BFD7B0D7C" box="[317,725,1885,1912]" italics="true" pageId="14" pageNumber="35">
|
||
<collectorName id="26F053294550FFACFE9DF89BFE740D7C" box="[317,474,1886,1912]" pageId="14" pageNumber="35">E.Jovanovska</collectorName>
|
||
,
|
||
<date id="FFBB103F4550FFACFE48F89BFDAA0D7C" box="[488,516,1886,1912]" pageId="14" pageNumber="35" value="2018-09-22">
|
||
<collectingDate id="EFFFE9D74550FFACFE48F89BFDAA0D7C" box="[488,516,1886,1912]" pageId="14" pageNumber="35" value="2018-09-22">22</collectingDate>
|
||
</date>
|
||
<superScript id="7C709BB74550FFACFDA4F898FDBA0D6F" attach="left" box="[516,532,1885,1899]" fontSize="6" pageId="14" pageNumber="35">nd</superScript>
|
||
September 2018
|
||
</emphasis>
|
||
(
|
||
<typeStatus id="54BE885D4550FFACFD45F89BFCE70D7C" box="[741,841,1886,1912]" pageId="14" pageNumber="35" type="holotype">holotype</typeStatus>
|
||
designated here, circled specimen ANS-GC17200! =
|
||
<figureCitation id="133E2A7A4550FFACFF28F847FF490D98" box="[136,231,1922,1948]" captionStart="FIGURES 116–135" captionStartId="18.[136,243,2028,2050]" captionTargetBox="[159,1428,190,2004]" captionTargetId="figure-30@18.[159,1428,190,2004]" captionTargetPageId="18" captionText="FIGURES 116–135. Afrocymbella gibba sp. nov., LM valve views. Figs 116–120, 122, 124–127. Valves from the type material. Fig. 120. Holotype specimen. Scale bar = 10 μm." figureDoi="http://doi.org/10.5281/zenodo.6952015" httpUri="https://zenodo.org/record/6952015/files/figure.png" pageId="14" pageNumber="35">Fig. 120</figureCitation>
|
||
, isotypes circled specimens ANS-GC17201!, BM-101981! Cleaned type materials: ANS-GCM 33029.
|
||
</materialsCitation>
|
||
</paragraph>
|
||
<paragraph id="8BBA36FF4550FFACFF1DF863FB5B0DC5" blockId="14.[136,1452,1273,2056]" box="[189,1269,1958,1985]" pageId="14" pageNumber="35">Registration: https://zoobank.org/NomenclaturalActs/429ab0b2-a77b-4be4-8101-0c5b99bb6b27</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="C31F65744550FFACFF1DF80FFD0B020C" pageId="14" pageNumber="35" type="etymology">
|
||
<paragraph id="8BBA36FF4550FFACFF1DF80FFD0B020C" blockId="14.[136,1452,1273,2056]" pageId="14" pageNumber="35">
|
||
<emphasis id="B971EAED4550FFACFF1DF80FFECA0DE0" bold="true" box="[189,356,1994,2020]" pageId="14" pageNumber="35">Etymology:—</emphasis>
|
||
The species name ‘
|
||
<taxonomicName id="4C054D7C4550FFACFD94F80FFDDA0DE0" authorityName="Stone & Wilson & Jovanovska" authorityYear="2022" box="[564,628,1994,2020]" class="Bacillariophyceae" family="Cymbellaceae" genus="Afrocymbella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="14" pageNumber="35" phylum="Ochrophyta" rank="species" species="gibba">
|
||
<emphasis id="B971EAED4550FFACFD94F80FFDDA0DE0" box="[564,628,1994,2020]" italics="true" pageId="14" pageNumber="35">gibba</emphasis>
|
||
</taxonomicName>
|
||
’ refers to the wide, tumescent shape of the ventral margin that distinguishes it from other similar large
|
||
<taxonomicName id="4C054D7C4550FFACFE10F82BFD0B020C" box="[432,677,2030,2056]" class="Bacillariophyceae" family="Cymbellaceae" genus="Afrocymbella" kingdom="Chromista" order="Cymbellales" pageId="14" pageNumber="35" phylum="Ochrophyta" rank="species" species="undetermined">
|
||
<emphasis id="B971EAED4550FFACFE10F82BFDE8020C" box="[432,582,2030,2056]" italics="true" pageId="14" pageNumber="35">Afrocymbella</emphasis>
|
||
species.
|
||
</taxonomicName>
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="C31F65744551FFADFF1DFF5BFE6D0B21" pageId="15" pageNumber="36" type="distribution">
|
||
<paragraph id="8BBA36FF4551FFADFF1DFF5BFE6D0B21" blockId="15.[136,1452,158,293]" pageId="15" pageNumber="36">
|
||
<emphasis id="B971EAED4551FFADFF1DFF5BFEDB0ABC" bold="true" box="[189,373,158,184]" pageId="15" pageNumber="36">Distribution:—</emphasis>
|
||
<emphasis id="B971EAED4551FFADFED5FF5BFD040ABC" box="[373,682,158,184]" italics="true" pageId="15" pageNumber="36">
|
||
<taxonomicName id="4C054D7C4551FFADFED5FF5BFDFF0ABC" authority="Stone & Wilson & Jovanovska, 2022" authorityName="Stone & Wilson & Jovanovska" authorityYear="2022" box="[373,593,158,184]" class="Bacillariophyceae" family="Cymbellaceae" genus="Afrocymbella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="15" pageNumber="36" phylum="Ochrophyta" rank="species" species="gibba" status="sp. nov.">Afrocymbella gibba</taxonomicName>
|
||
<taxonomicNameLabel id="A24257964551FFADFDF6FF5AFD040ABC" box="[598,682,159,184]" pageId="15" pageNumber="36" rank="species">sp. nov.</taxonomicNameLabel>
|
||
</emphasis>
|
||
has been observed in both Lake
|
||
<collectingCountry id="F312766F4551FFADFBB2FF5BFBC60ABC" box="[1042,1128,158,184]" name="Malawi" pageId="15" pageNumber="36">Malawi</collectingCountry>
|
||
and Lake Tanganyika. It was common in samples from Chembe (Cm) and
|
||
<collectingRegion id="49C1F81D4551FFADFD29FF07FD550AD8" box="[649,763,194,220]" country="Malawi" name="Mangochi" pageId="15" pageNumber="36">Mangochi</collectingRegion>
|
||
(Ma) in the southern sub-basin of Lake
|
||
<collectingCountry id="F312766F4551FFADFB66FF07FAB20AD8" box="[1222,1308,194,220]" name="Malawi" pageId="15" pageNumber="36">Malawi</collectingCountry>
|
||
(
|
||
<figureCitation id="133E2A7A4551FFADFA8BFF07FAC00AD8" box="[1323,1390,194,220]" captionStart="FIGURE 1" captionStartId="2.[136,229,2013,2035]" captionTargetBox="[311,1276,350,1986]" captionTargetId="figure-119@2.[311,1276,350,1986]" captionTargetPageId="2" captionText="FIGURE 1. Map of the lakes Tanganyika and Malawi, showing the sampling locations of modern (red circles) and fossil (cores MAL05- 1C and NPO4-KH1-1K; white circles) specimens used in this study." figureDoi="http://doi.org/10.5281/zenodo.6951975" httpUri="https://zenodo.org/record/6951975/files/figure.png" pageId="15" pageNumber="36">Fig. 1</figureCitation>
|
||
). We also observed many specimens with similar characteristics to this taxon from the sediments of the core MAL05-1C, although rare in occurrence.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |