636 lines
84 KiB
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636 lines
84 KiB
XML
<document ID-DOI="10.11646/phytotaxa.585.4.4" ID-ISSN="1179-3163" ID-Zenodo-Dep="7703860" checkinTime="1678177183896" checkinUser="plazi" docAuthor="Vijver, Bart Van De, Gogne, Britt, Hoogsteyns, Gabrielle, Velde, Levente Van De, Vlaminck, Luna, Kabota, Sija A., Teunen, Lies & Wetzel, Carlos E." docDate="2023" docId="5D2A87B4AC281F130490FF7EFB83AE68" docLanguage="en" docName="phytotaxa.585.4.4.pdf" docOrigin="Phytotaxa 585 (4)" docSource="http://dx.doi.org/10.11646/phytotaxa.585.4.4" docStyle="DocumentStyle:96748F8F1B6C902996E134952A3A36B9.5:Phytotaxa.2014-.journal_article" docStyleId="96748F8F1B6C902996E134952A3A36B9" docStyleName="Phytotaxa.2014-.journal_article" docStyleVersion="5" docTitle="Planothidium africanum Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C. E. Wetzel 2023, sp. nov." docType="treatment" docVersion="3" lastPageNumber="284" masterDocId="A113FFCCAC291F100418FF8AFFB3A836" masterDocTitle="Planothidium africanum sp. nov., a new freshwater diatom (Bacillariophyta) species from Tanzania" masterLastPageNumber="286" masterPageNumber="281" pageNumber="282" updateTime="1678214165464" updateUser="juliana" zenodo-license-figures="UNSPECIFIED" zenodo-license-treatments="UNSPECIFIED">
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<mods:title>Planothidium africanum sp. nov., a new freshwater diatom (Bacillariophyta) species from Tanzania</mods:title>
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<mods:namePart>Vijver, Bart Van De</mods:namePart>
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<mods:affiliation>Meise Botanic Garden, Research Department, Nieuwelaan 38, 1860 Meise, Belgium & University of Antwerp, Department of Biology - ECOSPHERE, Universiteitsplein 1, 2610 Wilrijk, Belgium & bart. vandevijver @ plantentuinmeise. be; https: // orcid. org / 0000 - 0002 - 6244 - 1886</mods:affiliation>
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<mods:nameIdentifier type="email">bart.vandevijver@plantentuinmeise.be</mods:nameIdentifier>
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<mods:namePart>Gogne, Britt</mods:namePart>
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<mods:affiliation>Meise Botanic Garden, Research Department, Nieuwelaan 38, 1860 Meise, Belgium & britt. gogne @ student. uantwerpen. be</mods:affiliation>
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<mods:namePart>Hoogsteyns, Gabrielle</mods:namePart>
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<mods:affiliation>Meise Botanic Garden, Research Department, Nieuwelaan 38, 1860 Meise, Belgium & gabrielle. hoogsteyns @ student. uantwerpen. be</mods:affiliation>
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<mods:namePart>Velde, Levente Van De</mods:namePart>
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<mods:affiliation>Meise Botanic Garden, Research Department, Nieuwelaan 38, 1860 Meise, Belgium & levente. vandevelde @ student. uantwerpen. be</mods:affiliation>
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Vlaminck, Luna</mods:namePart>
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<mods:affiliation>Meise Botanic Garden, Research Department, Nieuwelaan 38, 1860 Meise, Belgium & luna. vlaminck @ student. uantwerpen. be</mods:affiliation>
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Kabota, Sija A.</mods:namePart>
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<mods:nameIdentifier type="ORCID">0000-0003-0842-6893</mods:nameIdentifier>
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<mods:affiliation>Department of Crop Science and Horticulture, Sokoine University of Agriculture (SUA), P. O. Box 3005 Chuo Kikuu, Morogoro, Tanzania & sija. kabota @ nsi. ac. tz; https: // orcid. org / 0000 - 0003 - 0842 - 6893</mods:affiliation>
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<mods:nameIdentifier type="email">sija.kabota@nsi.ac.tz</mods:nameIdentifier>
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<mods:namePart>Teunen, Lies</mods:namePart>
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<mods:nameIdentifier type="ORCID">0000-0002-7573-248X</mods:nameIdentifier>
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<mods:affiliation>University of Antwerp, Department of Biology - ECOSPHERE, Universiteitsplein 1, 2610 Wilrijk, Belgium & lies. teunen @ uantwerpen. be; https: // orcid. org / 0000 - 0002 - 7573 - 248 X</mods:affiliation>
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<mods:nameIdentifier type="email">lies.teunen@uantwerpen.be</mods:nameIdentifier>
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Wetzel, Carlos E.</mods:namePart>
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<mods:affiliation>Luxembourg Institute of Science and Technology (LIST), Environmental Research & Innovation (ERIN) Department, Observatory for Climate, Environment and Biodiversity (OCEB), 41 rue du Brill, 4422 Belvaux, Luxembourg & carlos. wetzel @ list. lu; https: // orcid. org / 0000 - 0001 - 5330 - 0494</mods:affiliation>
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<mods:nameIdentifier type="email">carlos.wetzel@list.lu</mods:nameIdentifier>
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<mods:title>Phytotaxa</mods:title>
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<mods:part>
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<mods:date>2023</mods:date>
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<mods:number>2023-03-07</mods:number>
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<mods:detail type="volume">
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<mods:number>585</mods:number>
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</mods:detail>
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<mods:detail type="issue">
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<mods:number>4</mods:number>
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<mods:start>281</mods:start>
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<mods:url>http://dx.doi.org/10.11646/phytotaxa.585.4.4</mods:url>
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<mods:classification>journal article</mods:classification>
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<mods:identifier type="DOI">10.11646/phytotaxa.585.4.4</mods:identifier>
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<mods:identifier type="ISSN">1179-3163</mods:identifier>
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<mods:identifier type="Zenodo-Dep">7703860</mods:identifier>
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<treatment LSID="urn:lsid:plazi:treatment:5D2A87B4AC281F130490FF7EFB83AE68" httpUri="http://treatment.plazi.org/id/5D2A87B4AC281F130490FF7EFB83AE68" lastPageId="3" lastPageNumber="284" pageId="1" pageNumber="282">
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<subSubSection pageId="1" pageNumber="282" type="nomenclature">
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<heading bold="true" centered="true" fontSize="11" level="1" pageId="1" pageNumber="282" reason="1">
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<taxonomicName authority="Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen &" authorityName="Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C. E. Wetzel" authorityYear="2023" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="1" pageNumber="282" phylum="Bacillariophyta" rank="species" species="africanum" status="sp. nov.">
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<emphasis bold="true" box="[136,1451,244,271]" pageId="1" pageNumber="282">
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<emphasis bold="true" box="[136,429,244,271]" italics="true" pageId="1" pageNumber="282">Planothidium africanum</emphasis>
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Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen &
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</emphasis>
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<emphasis bold="true" box="[136,366,280,306]" pageId="1" pageNumber="282">
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C.E.Wetzel
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<taxonomicNameLabel box="[277,366,280,306]" pageId="1" pageNumber="282" rank="species">sp. nov.</taxonomicNameLabel>
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</taxonomicName>
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</heading>
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</paragraph>
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<subSubSection pageId="1" pageNumber="282" type="description">
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<paragraph blockId="1.[136,1451,244,307]" box="[373,701,280,307]" pageId="1" pageNumber="282">
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(
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<figureCitation box="[381,494,280,306]" captionStart="FIGURES 1–35" captionStartId="2.[136,248,1642,1664]" captionTargetBox="[273,1313,187,1615]" captionTargetId="figure-31@2.[273,1313,187,1615]" captionTargetPageId="2" captionText="FIGURES 1–35. Planothidium africanum Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C.E.Wetzel, sp. nov. LM and SEM pictures taken from the holotype slide (BR-4778, Brook near Morogoro, Tanzania, sample L10 Stone). Figs 1–14. LM diminution series of the rapheless valve. Figs 15–28. LM diminution series of the raphebearing valve. Fig. 29. SEM external view of an entire rapheless valve. Fig. 30. SEM internal view of an entire rapheless valve. Fig. 31. SEM external view of an entire raphebearing valve. Fig. 32. SEM internal view of an entire raphe-bearing valve. Fig. 33. SEM external detail of the valve apex of a rapheless valve showing the structure of the striae. Note the mantle striae composed of irregular groupings of areolae. Fig. 34. SEM external detail of the girdle. Fig. 35. SEM internal detail of the cavum spanning the neighboring striae. Scale bars represent 10 µm except for Figs 33–35 where scale bar = 1 µm." figureDoi="http://doi.org/10.5281/zenodo.7703862" httpUri="https://zenodo.org/record/7703862/files/figure.png" pageId="1" pageNumber="282">Figs 1–28</figureCitation>
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LM, 29–35 SEM)
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</paragraph>
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<paragraph blockId="1.[136,1452,352,2071]" pageId="1" pageNumber="282">
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Valves lanceolate (in the largest specimens) to elliptic-lanceolate with distinctly convex margins and protracted, rostrate but truncated apices. Valve dimensions (n=40): length 11–25 μm, width 5.5–6.5 μm. Rapheless valve (
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<figureCitation captionStart="FIGURES 1–35" captionStartId="2.[136,248,1642,1664]" captionTargetBox="[273,1313,187,1615]" captionTargetId="figure-31@2.[273,1313,187,1615]" captionTargetPageId="2" captionText="FIGURES 1–35. Planothidium africanum Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C.E.Wetzel, sp. nov. LM and SEM pictures taken from the holotype slide (BR-4778, Brook near Morogoro, Tanzania, sample L10 Stone). Figs 1–14. LM diminution series of the rapheless valve. Figs 15–28. LM diminution series of the raphebearing valve. Fig. 29. SEM external view of an entire rapheless valve. Fig. 30. SEM internal view of an entire rapheless valve. Fig. 31. SEM external view of an entire raphebearing valve. Fig. 32. SEM internal view of an entire raphe-bearing valve. Fig. 33. SEM external detail of the valve apex of a rapheless valve showing the structure of the striae. Note the mantle striae composed of irregular groupings of areolae. Fig. 34. SEM external detail of the girdle. Fig. 35. SEM internal detail of the cavum spanning the neighboring striae. Scale bars represent 10 µm except for Figs 33–35 where scale bar = 1 µm." figureDoi="http://doi.org/10.5281/zenodo.7703862" httpUri="https://zenodo.org/record/7703862/files/figure.png" pageId="1" pageNumber="282">Figs 1–14, 29, 30, 33 & 35</figureCitation>
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): Axial area usually narrow, straight, linear, occasionally weakly lanceolate and broadening near the central area. Irregularly shaped, shallow depressions present in both central and axial area (
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<figureCitation box="[1302,1438,460,486]" captionStart="FIGURES 1–35" captionStartId="2.[136,248,1642,1664]" captionTargetBox="[273,1313,187,1615]" captionTargetId="figure-31@2.[273,1313,187,1615]" captionTargetPageId="2" captionText="FIGURES 1–35. Planothidium africanum Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C.E.Wetzel, sp. nov. LM and SEM pictures taken from the holotype slide (BR-4778, Brook near Morogoro, Tanzania, sample L10 Stone). Figs 1–14. LM diminution series of the rapheless valve. Figs 15–28. LM diminution series of the raphebearing valve. Fig. 29. SEM external view of an entire rapheless valve. Fig. 30. SEM internal view of an entire rapheless valve. Fig. 31. SEM external view of an entire raphebearing valve. Fig. 32. SEM internal view of an entire raphe-bearing valve. Fig. 33. SEM external detail of the valve apex of a rapheless valve showing the structure of the striae. Note the mantle striae composed of irregular groupings of areolae. Fig. 34. SEM external detail of the girdle. Fig. 35. SEM internal detail of the cavum spanning the neighboring striae. Scale bars represent 10 µm except for Figs 33–35 where scale bar = 1 µm." figureDoi="http://doi.org/10.5281/zenodo.7703862" httpUri="https://zenodo.org/record/7703862/files/figure.png" pageId="1" pageNumber="282">Figs 29, 33</figureCitation>
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). Central area with a unilateral large horseshoe-shaped hyaline area. Cavum distinctly visible, internally passing over the neighboring striae (
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<figureCitation box="[354,484,532,559]" captionStart="FIGURES 1–35" captionStartId="2.[136,248,1642,1664]" captionTargetBox="[273,1313,187,1615]" captionTargetId="figure-31@2.[273,1313,187,1615]" captionTargetPageId="2" captionText="FIGURES 1–35. Planothidium africanum Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C.E.Wetzel, sp. nov. LM and SEM pictures taken from the holotype slide (BR-4778, Brook near Morogoro, Tanzania, sample L10 Stone). Figs 1–14. LM diminution series of the rapheless valve. Figs 15–28. LM diminution series of the raphebearing valve. Fig. 29. SEM external view of an entire rapheless valve. Fig. 30. SEM internal view of an entire rapheless valve. Fig. 31. SEM external view of an entire raphebearing valve. Fig. 32. SEM internal view of an entire raphe-bearing valve. Fig. 33. SEM external detail of the valve apex of a rapheless valve showing the structure of the striae. Note the mantle striae composed of irregular groupings of areolae. Fig. 34. SEM external detail of the girdle. Fig. 35. SEM internal detail of the cavum spanning the neighboring striae. Scale bars represent 10 µm except for Figs 33–35 where scale bar = 1 µm." figureDoi="http://doi.org/10.5281/zenodo.7703862" httpUri="https://zenodo.org/record/7703862/files/figure.png" pageId="1" pageNumber="282">Figs 30, 35</figureCitation>
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). Striae on the opposite site only weakly to almost shortened. Striae parallel to weakly radiate near the central area, becoming more radiate near the apices,
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<quantity box="[919,1019,568,595]" metricMagnitude="-1" metricUnit="m" metricValue="3.937" metricValueMax="4.064" metricValueMin="3.81" pageId="1" pageNumber="282" unit="in" value="15.5" valueMax="16.0" valueMin="15.0">15–16 in</quantity>
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10 µm. Striae multiseriate, composed of three rows of small, rounded areolae at the valve margins, becoming biseriate towards the axial area (
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<figureCitation box="[1311,1438,604,630]" captionStart="FIGURES 1–35" captionStartId="2.[136,248,1642,1664]" captionTargetBox="[273,1313,187,1615]" captionTargetId="figure-31@2.[273,1313,187,1615]" captionTargetPageId="2" captionText="FIGURES 1–35. Planothidium africanum Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C.E.Wetzel, sp. nov. LM and SEM pictures taken from the holotype slide (BR-4778, Brook near Morogoro, Tanzania, sample L10 Stone). Figs 1–14. LM diminution series of the rapheless valve. Figs 15–28. LM diminution series of the raphebearing valve. Fig. 29. SEM external view of an entire rapheless valve. Fig. 30. SEM internal view of an entire rapheless valve. Fig. 31. SEM external view of an entire raphebearing valve. Fig. 32. SEM internal view of an entire raphe-bearing valve. Fig. 33. SEM external detail of the valve apex of a rapheless valve showing the structure of the striae. Note the mantle striae composed of irregular groupings of areolae. Fig. 34. SEM external detail of the girdle. Fig. 35. SEM internal detail of the cavum spanning the neighboring striae. Scale bars represent 10 µm except for Figs 33–35 where scale bar = 1 µm." figureDoi="http://doi.org/10.5281/zenodo.7703862" httpUri="https://zenodo.org/record/7703862/files/figure.png" pageId="1" pageNumber="282">Fig. 29, 33</figureCitation>
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). On the mantle, irregular groupings of small, rounded areolae present, continuing the valve face striae on the mantle (
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<figureCitation box="[144,231,676,702]" captionStart="FIGURES 1–35" captionStartId="2.[136,248,1642,1664]" captionTargetBox="[273,1313,187,1615]" captionTargetId="figure-31@2.[273,1313,187,1615]" captionTargetPageId="2" captionText="FIGURES 1–35. Planothidium africanum Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C.E.Wetzel, sp. nov. LM and SEM pictures taken from the holotype slide (BR-4778, Brook near Morogoro, Tanzania, sample L10 Stone). Figs 1–14. LM diminution series of the rapheless valve. Figs 15–28. LM diminution series of the raphebearing valve. Fig. 29. SEM external view of an entire rapheless valve. Fig. 30. SEM internal view of an entire rapheless valve. Fig. 31. SEM external view of an entire raphebearing valve. Fig. 32. SEM internal view of an entire raphe-bearing valve. Fig. 33. SEM external detail of the valve apex of a rapheless valve showing the structure of the striae. Note the mantle striae composed of irregular groupings of areolae. Fig. 34. SEM external detail of the girdle. Fig. 35. SEM internal detail of the cavum spanning the neighboring striae. Scale bars represent 10 µm except for Figs 33–35 where scale bar = 1 µm." figureDoi="http://doi.org/10.5281/zenodo.7703862" httpUri="https://zenodo.org/record/7703862/files/figure.png" pageId="1" pageNumber="282">Fig. 33</figureCitation>
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). Internally, striae located in deep grooves (
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<figureCitation box="[744,832,676,702]" captionStart="FIGURES 1–35" captionStartId="2.[136,248,1642,1664]" captionTargetBox="[273,1313,187,1615]" captionTargetId="figure-31@2.[273,1313,187,1615]" captionTargetPageId="2" captionText="FIGURES 1–35. Planothidium africanum Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C.E.Wetzel, sp. nov. LM and SEM pictures taken from the holotype slide (BR-4778, Brook near Morogoro, Tanzania, sample L10 Stone). Figs 1–14. LM diminution series of the rapheless valve. Figs 15–28. LM diminution series of the raphebearing valve. Fig. 29. SEM external view of an entire rapheless valve. Fig. 30. SEM internal view of an entire rapheless valve. Fig. 31. SEM external view of an entire raphebearing valve. Fig. 32. SEM internal view of an entire raphe-bearing valve. Fig. 33. SEM external detail of the valve apex of a rapheless valve showing the structure of the striae. Note the mantle striae composed of irregular groupings of areolae. Fig. 34. SEM external detail of the girdle. Fig. 35. SEM internal detail of the cavum spanning the neighboring striae. Scale bars represent 10 µm except for Figs 33–35 where scale bar = 1 µm." figureDoi="http://doi.org/10.5281/zenodo.7703862" httpUri="https://zenodo.org/record/7703862/files/figure.png" pageId="1" pageNumber="282">Fig. 30</figureCitation>
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). Raphe valve (
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<figureCitation box="[1015,1310,676,703]" captionStart="FIGURES 1–35" captionStartId="2.[136,248,1642,1664]" captionTargetBox="[273,1313,187,1615]" captionTargetId="figure-31@2.[273,1313,187,1615]" captionTargetPageId="2" captionText="FIGURES 1–35. Planothidium africanum Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C.E.Wetzel, sp. nov. LM and SEM pictures taken from the holotype slide (BR-4778, Brook near Morogoro, Tanzania, sample L10 Stone). Figs 1–14. LM diminution series of the rapheless valve. Figs 15–28. LM diminution series of the raphebearing valve. Fig. 29. SEM external view of an entire rapheless valve. Fig. 30. SEM internal view of an entire rapheless valve. Fig. 31. SEM external view of an entire raphebearing valve. Fig. 32. SEM internal view of an entire raphe-bearing valve. Fig. 33. SEM external detail of the valve apex of a rapheless valve showing the structure of the striae. Note the mantle striae composed of irregular groupings of areolae. Fig. 34. SEM external detail of the girdle. Fig. 35. SEM internal detail of the cavum spanning the neighboring striae. Scale bars represent 10 µm except for Figs 33–35 where scale bar = 1 µm." figureDoi="http://doi.org/10.5281/zenodo.7703862" httpUri="https://zenodo.org/record/7703862/files/figure.png" pageId="1" pageNumber="282">Figs 15–28, 31, 32 & 34</figureCitation>
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): Axial area very narrow, linear, not widening towards the central area. Central area asymmetrical, rectangular to slightly wedgeshaped, bordered on each side by 2–3 shortened striae, whereas on the opposite side, striae either lacking or extremely shortened. Raphe branches straight with expanded, drop-like central raphe pores (
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<figureCitation box="[1076,1162,784,810]" captionStart="FIGURES 1–35" captionStartId="2.[136,248,1642,1664]" captionTargetBox="[273,1313,187,1615]" captionTargetId="figure-31@2.[273,1313,187,1615]" captionTargetPageId="2" captionText="FIGURES 1–35. Planothidium africanum Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C.E.Wetzel, sp. nov. LM and SEM pictures taken from the holotype slide (BR-4778, Brook near Morogoro, Tanzania, sample L10 Stone). Figs 1–14. LM diminution series of the rapheless valve. Figs 15–28. LM diminution series of the raphebearing valve. Fig. 29. SEM external view of an entire rapheless valve. Fig. 30. SEM internal view of an entire rapheless valve. Fig. 31. SEM external view of an entire raphebearing valve. Fig. 32. SEM internal view of an entire raphe-bearing valve. Fig. 33. SEM external detail of the valve apex of a rapheless valve showing the structure of the striae. Note the mantle striae composed of irregular groupings of areolae. Fig. 34. SEM external detail of the girdle. Fig. 35. SEM internal detail of the cavum spanning the neighboring striae. Scale bars represent 10 µm except for Figs 33–35 where scale bar = 1 µm." figureDoi="http://doi.org/10.5281/zenodo.7703862" httpUri="https://zenodo.org/record/7703862/files/figure.png" pageId="1" pageNumber="282">Fig. 31</figureCitation>
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). Terminal raphe fissures unilaterally deflected (
|
||
<figureCitation box="[390,474,820,846]" captionStart="FIGURES 1–35" captionStartId="2.[136,248,1642,1664]" captionTargetBox="[273,1313,187,1615]" captionTargetId="figure-31@2.[273,1313,187,1615]" captionTargetPageId="2" captionText="FIGURES 1–35. Planothidium africanum Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C.E.Wetzel, sp. nov. LM and SEM pictures taken from the holotype slide (BR-4778, Brook near Morogoro, Tanzania, sample L10 Stone). Figs 1–14. LM diminution series of the rapheless valve. Figs 15–28. LM diminution series of the raphebearing valve. Fig. 29. SEM external view of an entire rapheless valve. Fig. 30. SEM internal view of an entire rapheless valve. Fig. 31. SEM external view of an entire raphebearing valve. Fig. 32. SEM internal view of an entire raphe-bearing valve. Fig. 33. SEM external detail of the valve apex of a rapheless valve showing the structure of the striae. Note the mantle striae composed of irregular groupings of areolae. Fig. 34. SEM external detail of the girdle. Fig. 35. SEM internal detail of the cavum spanning the neighboring striae. Scale bars represent 10 µm except for Figs 33–35 where scale bar = 1 µm." figureDoi="http://doi.org/10.5281/zenodo.7703862" httpUri="https://zenodo.org/record/7703862/files/figure.png" pageId="1" pageNumber="282">Fig. 31</figureCitation>
|
||
). Striae weakly radiate throughout the entire valve,
|
||
<quantity box="[1059,1159,820,846]" metricMagnitude="-1" metricUnit="m" metricValue="3.81" metricValueMax="4.064" metricValueMin="3.556" pageId="1" pageNumber="282" unit="in" value="15.0" valueMax="16.0" valueMin="14.0">14–16 in</quantity>
|
||
10 μm. Internally, central nodule clearly raised (
|
||
<figureCitation box="[389,474,856,882]" captionStart="FIGURES 1–35" captionStartId="2.[136,248,1642,1664]" captionTargetBox="[273,1313,187,1615]" captionTargetId="figure-31@2.[273,1313,187,1615]" captionTargetPageId="2" captionText="FIGURES 1–35. Planothidium africanum Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C.E.Wetzel, sp. nov. LM and SEM pictures taken from the holotype slide (BR-4778, Brook near Morogoro, Tanzania, sample L10 Stone). Figs 1–14. LM diminution series of the rapheless valve. Figs 15–28. LM diminution series of the raphebearing valve. Fig. 29. SEM external view of an entire rapheless valve. Fig. 30. SEM internal view of an entire rapheless valve. Fig. 31. SEM external view of an entire raphebearing valve. Fig. 32. SEM internal view of an entire raphe-bearing valve. Fig. 33. SEM external detail of the valve apex of a rapheless valve showing the structure of the striae. Note the mantle striae composed of irregular groupings of areolae. Fig. 34. SEM external detail of the girdle. Fig. 35. SEM internal detail of the cavum spanning the neighboring striae. Scale bars represent 10 µm except for Figs 33–35 where scale bar = 1 µm." figureDoi="http://doi.org/10.5281/zenodo.7703862" httpUri="https://zenodo.org/record/7703862/files/figure.png" pageId="1" pageNumber="282">Fig. 32</figureCitation>
|
||
). Internal central raphe endings weakly deflected into opposite directions, terminating onto the central nodule (
|
||
<figureCitation box="[415,501,892,918]" captionStart="FIGURES 1–35" captionStartId="2.[136,248,1642,1664]" captionTargetBox="[273,1313,187,1615]" captionTargetId="figure-31@2.[273,1313,187,1615]" captionTargetPageId="2" captionText="FIGURES 1–35. Planothidium africanum Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C.E.Wetzel, sp. nov. LM and SEM pictures taken from the holotype slide (BR-4778, Brook near Morogoro, Tanzania, sample L10 Stone). Figs 1–14. LM diminution series of the rapheless valve. Figs 15–28. LM diminution series of the raphebearing valve. Fig. 29. SEM external view of an entire rapheless valve. Fig. 30. SEM internal view of an entire rapheless valve. Fig. 31. SEM external view of an entire raphebearing valve. Fig. 32. SEM internal view of an entire raphe-bearing valve. Fig. 33. SEM external detail of the valve apex of a rapheless valve showing the structure of the striae. Note the mantle striae composed of irregular groupings of areolae. Fig. 34. SEM external detail of the girdle. Fig. 35. SEM internal detail of the cavum spanning the neighboring striae. Scale bars represent 10 µm except for Figs 33–35 where scale bar = 1 µm." figureDoi="http://doi.org/10.5281/zenodo.7703862" httpUri="https://zenodo.org/record/7703862/files/figure.png" pageId="1" pageNumber="282">Fig. 32</figureCitation>
|
||
). Internally, striae located in broad, deep grooves (
|
||
<figureCitation box="[1079,1165,892,918]" captionStart="FIGURES 1–35" captionStartId="2.[136,248,1642,1664]" captionTargetBox="[273,1313,187,1615]" captionTargetId="figure-31@2.[273,1313,187,1615]" captionTargetPageId="2" captionText="FIGURES 1–35. Planothidium africanum Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C.E.Wetzel, sp. nov. LM and SEM pictures taken from the holotype slide (BR-4778, Brook near Morogoro, Tanzania, sample L10 Stone). Figs 1–14. LM diminution series of the rapheless valve. Figs 15–28. LM diminution series of the raphebearing valve. Fig. 29. SEM external view of an entire rapheless valve. Fig. 30. SEM internal view of an entire rapheless valve. Fig. 31. SEM external view of an entire raphebearing valve. Fig. 32. SEM internal view of an entire raphe-bearing valve. Fig. 33. SEM external detail of the valve apex of a rapheless valve showing the structure of the striae. Note the mantle striae composed of irregular groupings of areolae. Fig. 34. SEM external detail of the girdle. Fig. 35. SEM internal detail of the cavum spanning the neighboring striae. Scale bars represent 10 µm except for Figs 33–35 where scale bar = 1 µm." figureDoi="http://doi.org/10.5281/zenodo.7703862" httpUri="https://zenodo.org/record/7703862/files/figure.png" pageId="1" pageNumber="282">Fig. 32</figureCitation>
|
||
). Cingulum composed of multiple open girdle bands (
|
||
<figureCitation box="[451,535,928,954]" captionStart="FIGURES 1–35" captionStartId="2.[136,248,1642,1664]" captionTargetBox="[273,1313,187,1615]" captionTargetId="figure-31@2.[273,1313,187,1615]" captionTargetPageId="2" captionText="FIGURES 1–35. Planothidium africanum Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C.E.Wetzel, sp. nov. LM and SEM pictures taken from the holotype slide (BR-4778, Brook near Morogoro, Tanzania, sample L10 Stone). Figs 1–14. LM diminution series of the rapheless valve. Figs 15–28. LM diminution series of the raphebearing valve. Fig. 29. SEM external view of an entire rapheless valve. Fig. 30. SEM internal view of an entire rapheless valve. Fig. 31. SEM external view of an entire raphebearing valve. Fig. 32. SEM internal view of an entire raphe-bearing valve. Fig. 33. SEM external detail of the valve apex of a rapheless valve showing the structure of the striae. Note the mantle striae composed of irregular groupings of areolae. Fig. 34. SEM external detail of the girdle. Fig. 35. SEM internal detail of the cavum spanning the neighboring striae. Scale bars represent 10 µm except for Figs 33–35 where scale bar = 1 µm." figureDoi="http://doi.org/10.5281/zenodo.7703862" httpUri="https://zenodo.org/record/7703862/files/figure.png" pageId="1" pageNumber="282">Fig. 34</figureCitation>
|
||
).
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection pageId="1" pageNumber="282" type="materials_examined">
|
||
<paragraph blockId="1.[136,1452,352,2071]" pageId="1" pageNumber="282">
|
||
<emphasis bold="true" box="[189,286,964,990]" pageId="1" pageNumber="282">Type:—</emphasis>
|
||
<materialsCitation collectingDate="2022-07" collectorName="Van & Velde" country="Tanzania" location="University of Antwerp" municipality="Van de Velde" pageId="1" pageNumber="282" specimenCount="1" stateProvince="Morogoro" typeStatus="holotype">
|
||
<collectingCountry box="[285,427,964,990]" name="Tanzania" pageId="1" pageNumber="282">TANZANIA</collectingCountry>
|
||
.
|
||
<collectingRegion box="[443,559,965,991]" country="Tanzania" name="Morogoro" pageId="1" pageNumber="282">Morogoro</collectingRegion>
|
||
, sample L10 stone, coll. date
|
||
<date box="[901,1006,964,990]" pageId="1" pageNumber="282" value="2022-07">
|
||
<collectingDate box="[901,1006,964,990]" pageId="1" pageNumber="282" value="2022-07">VII.2022</collectingDate>
|
||
</date>
|
||
, leg.
|
||
<collectingMunicipality box="[1068,1219,964,991]" pageId="1" pageNumber="282">
|
||
<collectorName box="[1068,1112,965,991]" pageId="1" pageNumber="282">Van</collectorName>
|
||
de
|
||
<collectorName box="[1155,1219,964,990]" pageId="1" pageNumber="282">Velde</collectorName>
|
||
</collectingMunicipality>
|
||
(
|
||
<typeStatus box="[1235,1335,964,990]" pageId="1" pageNumber="282">holotype</typeStatus>
|
||
slide BR-4778=
|
||
<figureCitation box="[215,282,1000,1026]" captionStart="FIGURES 1–35" captionStartId="2.[136,248,1642,1664]" captionTargetBox="[273,1313,187,1615]" captionTargetId="figure-31@2.[273,1313,187,1615]" captionTargetPageId="2" captionText="FIGURES 1–35. Planothidium africanum Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C.E.Wetzel, sp. nov. LM and SEM pictures taken from the holotype slide (BR-4778, Brook near Morogoro, Tanzania, sample L10 Stone). Figs 1–14. LM diminution series of the rapheless valve. Figs 15–28. LM diminution series of the raphebearing valve. Fig. 29. SEM external view of an entire rapheless valve. Fig. 30. SEM internal view of an entire rapheless valve. Fig. 31. SEM external view of an entire raphebearing valve. Fig. 32. SEM internal view of an entire raphe-bearing valve. Fig. 33. SEM external detail of the valve apex of a rapheless valve showing the structure of the striae. Note the mantle striae composed of irregular groupings of areolae. Fig. 34. SEM external detail of the girdle. Fig. 35. SEM internal detail of the cavum spanning the neighboring striae. Scale bars represent 10 µm except for Figs 33–35 where scale bar = 1 µm." figureDoi="http://doi.org/10.5281/zenodo.7703862" httpUri="https://zenodo.org/record/7703862/files/figure.png" pageId="1" pageNumber="282">Fig. 6</figureCitation>
|
||
, isotype slide 422,
|
||
<location LSID="urn:lsid:plazi:treatment:5D2A87B4AC281F130490FF7EFB83AE68:D05C6079AC281F1105EAFC62FD42AC34" box="[498,753,1000,1026]" country="Tanzania" municipality="Van de Velde" name="University of Antwerp" pageId="1" pageNumber="282" stateProvince="Morogoro">University of Antwerp</location>
|
||
, Belgium)
|
||
</materialsCitation>
|
||
.
|
||
</paragraph>
|
||
<paragraph blockId="1.[136,1452,352,2071]" box="[189,839,1036,1063]" pageId="1" pageNumber="282">
|
||
<emphasis bold="true" box="[189,472,1036,1062]" pageId="1" pageNumber="282">PhycoBank registration</emphasis>
|
||
:
|
||
<emphasis bold="true" box="[481,509,1036,1062]" pageId="1" pageNumber="282">—</emphasis>
|
||
www.PhycoBank.org/103609
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection pageId="1" pageNumber="282" type="biology_ecology">
|
||
<paragraph blockId="1.[136,1452,352,2071]" pageId="1" pageNumber="282">
|
||
<emphasis bold="true" box="[189,634,1072,1098]" pageId="1" pageNumber="282">Ecology & associated diatom flora:—</emphasis>
|
||
Sample L10 Stone (
|
||
<geoCoordinate box="[856,1027,1072,1098]" degrees="06" direction="south" minutes="49" orientation="latitude" pageId="1" pageNumber="282" precision="1" seconds="00.1" value="-6.8166943">S 06° 49’ 00.1”</geoCoordinate>
|
||
/
|
||
<geoCoordinate box="[1036,1224,1072,1099]" degrees="037" direction="east" minutes="42" orientation="longitude" pageId="1" pageNumber="282" precision="1" seconds="56.8" value="37.71578">E 037° 42’ 56.8”</geoCoordinate>
|
||
) was collected from some submerged stones in a small, shallow (<
|
||
<quantity box="[658,731,1108,1134]" metricMagnitude="-1" metricUnit="m" metricValue="3.0" pageId="1" pageNumber="282" unit="cm" value="30.0">30 cm</quantity>
|
||
), (nameless) brook, in the immediate surroundings of the city of
|
||
<collectingRegion box="[136,252,1145,1171]" country="Tanzania" name="Morogoro" pageId="1" pageNumber="282">Morogoro</collectingRegion>
|
||
, located between the cities of
|
||
<collectingRegion box="[582,678,1144,1170]" country="Tanzania" name="Dodoma" pageId="1" pageNumber="282">Dodoma</collectingRegion>
|
||
and
|
||
<collectingRegion box="[731,901,1144,1170]" country="Tanzania" name="Dar es Salaam" pageId="1" pageNumber="282">Dar-es-Salaam</collectingRegion>
|
||
. The brook was physico-chemically characterised by an alkaline pH (7.98), a high conductivity (1284 μS/cm), a 91.7 % Oxygen saturation and had a finely grained sediment on the bottom. The diatom flora in the
|
||
<typeStatus box="[686,734,1217,1243]" pageId="1" pageNumber="282">type</typeStatus>
|
||
sample is dominated by several
|
||
<taxonomicName box="[1105,1295,1216,1242]" pageId="1" pageNumber="282">
|
||
<emphasis box="[1105,1206,1216,1242]" italics="true" pageId="1" pageNumber="282">Navicula</emphasis>
|
||
species
|
||
</taxonomicName>
|
||
[
|
||
<taxonomicName authority="Kutzing (1844: 95)" authorityName="Kutzing" authorityPageNumber="95" authorityYear="1844" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="1" pageNumber="282" phylum="Ochrophyta" rank="species" species="rostellata">
|
||
<emphasis box="[1312,1451,1216,1242]" italics="true" pageId="1" pageNumber="282">N. rostellata</emphasis>
|
||
<bibRefCitation author="Kutzing, F. T." box="[136,353,1252,1279]" pageId="1" pageNumber="282" refId="ref3362" refString="Kutzing, F. T. (1844) Die Kieselschaligen Bacillarien oder Diatomeen. Nordhausen, pp. [i-vii], [1] - 152." type="book" year="1844">Kützing (1844: 95)</bibRefCitation>
|
||
</taxonomicName>
|
||
,
|
||
<taxonomicName authority="Meister (1932: 38)" authorityName="Meister" authorityPageNumber="38" authorityYear="1932" box="[364,728,1252,1278]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="1" pageNumber="282" phylum="Ochrophyta" rank="species" species="schroeteri">
|
||
<emphasis box="[364,510,1252,1278]" italics="true" pageId="1" pageNumber="282">N. schroeteri</emphasis>
|
||
<bibRefCitation author="Meister, F." box="[516,728,1252,1278]" pageId="1" pageNumber="282" refId="ref3541" refString="Meister, F. (1932) Kieselalgen aus Asien. Gebruder Borntraeger, Berlin, pp. [1] - 56." type="book" year="1932">Meister (1932: 38)</bibRefCitation>
|
||
</taxonomicName>
|
||
,
|
||
<taxonomicName authority="R. M. Patrick (1944: 5)" authorityName="R. M. Patrick" authorityPageNumber="5" authorityYear="1944" box="[740,1158,1252,1279]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="1" pageNumber="282" phylum="Ochrophyta" rank="species" species="symmetrica">
|
||
<emphasis box="[740,901,1253,1278]" italics="true" pageId="1" pageNumber="282">N. symmetrica</emphasis>
|
||
R.M.
|
||
<bibRefCitation author="Patrick, R. M." box="[959,1158,1252,1279]" pageId="1" pageNumber="282" pagination="1 - 6" refId="ref3728" refString="Patrick, R. M. (1944) Estudo Limnologico e Biologico das Lagoas da regiao Litoranea Sul-Riograndense II. Some New Diatoms from the Lagoa dos Quadros. Boletim do Museu Naciona, nova serie, botanica 2: 1 - 6." type="journal article" year="1944">Patrick (1944: 5)</bibRefCitation>
|
||
</taxonomicName>
|
||
],
|
||
<taxonomicName authorityName="D.B.Czarnecki" authorityYear="1994" box="[1179,1451,1252,1278]" class="Bacillariophyceae" family="Achnanthaceae" genus="Achnanthidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="1" pageNumber="282" phylum="Bacillariophyta" rank="species" species="exiguum">
|
||
<emphasis box="[1179,1451,1252,1278]" italics="true" pageId="1" pageNumber="282">Achnanthidium exiguum</emphasis>
|
||
</taxonomicName>
|
||
(Grunow in
|
||
<bibRefCitation author="Cleve, P. T. & Grunow, A." box="[280,592,1288,1314]" pageId="1" pageNumber="282" pagination="1 - 121" refId="ref2903" refString="Cleve, P. T. & Grunow, A. (1880) Beitrage zur Kenntniss der arctischen Diatomeen. Kongliga Svenska Vetenskaps-Akademiens Handlingar 17 (2): 1 - 121." type="journal article" year="1880">Cleve & Grunow 1880: 21</bibRefCitation>
|
||
)
|
||
<bibRefCitation author="Czarnecki, D. B." box="[611,872,1288,1315]" pageId="1" pageNumber="282" pagination="155 - 174" refId="ref2986" refString="Czarnecki, D. B. (1994) The freshwater diatoms culture collection at Loras College, Dubuque, Iowa. In: Proceedings of the 11 th International Diatom Symposium. Memoirs of the California Academy of Sciences 17: 155 - 174." type="journal article" year="1994">Czarnecki (1994: 157)</bibRefCitation>
|
||
,
|
||
<taxonomicName box="[887,1004,1288,1314]" class="Bacillariophyceae" family="Cocconeidaceae" genus="Cocconeis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="1" pageNumber="282" phylum="Bacillariophyta" rank="genus">
|
||
<emphasis box="[887,1004,1288,1314]" italics="true" pageId="1" pageNumber="282">Cocconeis</emphasis>
|
||
</taxonomicName>
|
||
cf.
|
||
<emphasis box="[1053,1149,1288,1314]" italics="true" pageId="1" pageNumber="282">euglypta</emphasis>
|
||
,
|
||
<taxonomicName authorityName="Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C. E. Wetzel" authorityYear="2023" box="[1166,1444,1288,1314]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="1" pageNumber="282" phylum="Bacillariophyta" rank="species" species="africanum">
|
||
<emphasis box="[1166,1444,1288,1314]" italics="true" pageId="1" pageNumber="282">Planothidium africanum</emphasis>
|
||
</taxonomicName>
|
||
,
|
||
<taxonomicName authority="(Ostrup 1903: 35) Lange-Bertalot (1999: 279)" authorityName="Lange-Bertalot" authorityPageNumber="279" authorityYear="1999" baseAuthorityName="Ostrup" baseAuthorityPageNumber="35" baseAuthorityYear="1903" box="[136,840,1324,1352]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="1" pageNumber="282" phylum="Bacillariophyta" rank="species" species="rostratum">
|
||
<emphasis box="[136,279,1325,1350]" italics="true" pageId="1" pageNumber="282">P. rostratum</emphasis>
|
||
(
|
||
<bibRefCitation author="Ostrup, E." box="[299,496,1324,1352]" pageId="1" pageNumber="282" pagination="28 - 41" refId="ref3672" refString="Ostrup, E. (1903) Freshwater diatoms. In Flora of Koh Chang. Part VII. Contributions to the knowledge of the Gulf of Siam. Preliminary Report on Botany. Results Danish Expedition to Siam (1899 - 1900). Botanisk Tidsskrift 25 (1): 28 - 41." type="journal article" year="1903">Østrup 1903: 35</bibRefCitation>
|
||
)
|
||
<bibRefCitation author="Lange-Bertalot, H." box="[518,840,1324,1350]" pageId="1" pageNumber="282" pagination="270 - 283" refId="ref3457" refString="Lange-Bertalot, H. (1999) Neue Kombinationen von Taxa aus Achnanthes Bory (sensu lato). Iconographia Diatomologica 6: 270 - 283." type="journal article" year="1999">Lange-Bertalot (1999: 279)</bibRefCitation>
|
||
</taxonomicName>
|
||
, several (non-identified)
|
||
<taxonomicName box="[1140,1394,1324,1350]" pageId="1" pageNumber="282">
|
||
<emphasis box="[1140,1297,1324,1350]" italics="true" pageId="1" pageNumber="282">Gomphonema</emphasis>
|
||
species
|
||
</taxonomicName>
|
||
, and
|
||
<taxonomicName authorityName="H.Lange-Bertalot & D.Metzeltin" authorityYear="1996" box="[136,251,1360,1386]" class="Bacillariophyceae" family="Naviculaceae" genus="Geissleria" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="1" pageNumber="282" phylum="Bacillariophyta" rank="genus">
|
||
<emphasis box="[136,251,1360,1386]" italics="true" pageId="1" pageNumber="282">Geissleria</emphasis>
|
||
</taxonomicName>
|
||
cf.
|
||
<emphasis box="[295,388,1360,1386]" italics="true" pageId="1" pageNumber="282">decussis</emphasis>
|
||
with lower numbers of
|
||
<taxonomicName authority="(Hustedt 1949: 44) Danielidis & Economou-Amilli" authorityName="Danielidis & Economou-Amilli" baseAuthorityName="Hustedt" baseAuthorityPageNumber="44" baseAuthorityYear="1949" box="[658,1452,1360,1386]" class="Bacillariophyceae" family="Naviculaceae" genus="Seminavis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="1" pageNumber="282" phylum="Bacillariophyta" rank="species" species="strigosa">
|
||
<emphasis box="[658,869,1360,1386]" italics="true" pageId="1" pageNumber="282">Seminavis strigosa</emphasis>
|
||
(
|
||
<bibRefCitation author="Hustedt, F." box="[884,1080,1360,1386]" pageId="1" pageNumber="282" pagination="24 - 55" refId="ref3180" refString="Hustedt, F. (1949) Diatomeen von Sinai-Halbinsel und aus dem Libanon-Gebiet. Hydrobiologia 2: 24 - 55." type="journal article" year="1949">Hustedt 1949: 44</bibRefCitation>
|
||
) Danielidis & Economou-Amilli
|
||
</taxonomicName>
|
||
(in Danieldis & Mann 2003: 30),
|
||
<taxonomicName box="[510,692,1396,1423]" class="Bacillariophyceae" family="Naviculaceae" genus="Halamphora" kingdom="Chromista" order="Naviculales" pageId="1" pageNumber="282" phylum="Bacillariophyta" rank="species" species="undetermined">
|
||
<emphasis box="[510,653,1396,1422]" italics="true" pageId="1" pageNumber="282">Halamphora</emphasis>
|
||
sp.
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName authority="(Grunow 1878: 116) Grunow" authorityName="Grunow" baseAuthorityName="Grunow" baseAuthorityPageNumber="116" baseAuthorityYear="1878" box="[745,1342,1396,1422]" class="Bacillariophyceae" family="Naviculaceae" genus="Pleurosigma" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="1" pageNumber="282" phylum="Bacillariophyta" rank="species" species="salinarum">
|
||
<emphasis box="[745,1008,1396,1422]" italics="true" pageId="1" pageNumber="282">Pleurosigma salinarum</emphasis>
|
||
(
|
||
<bibRefCitation author="Grunow, A." box="[1022,1235,1396,1422]" pageId="1" pageNumber="282" pagination="98 - 132" refId="ref3085" refString="Grunow, A. (1878) Algen und Diatomaceen aus dem Kaspischen Meere. In: Schneider, O. (Ed.) Naturwissenschaftliche Beitrage zur Kenntnis der Kaukasuslander, auf Grund seiner Sammelbeute. Dresden Burdach, Dresden, pp. 98 - 132." type="book chapter" year="1878">Grunow 1878: 116</bibRefCitation>
|
||
) Grunow
|
||
</taxonomicName>
|
||
(in
|
||
<bibRefCitation author="Cleve, P. T. & Grunow, A." pageId="1" pageNumber="282" pagination="1 - 121" refId="ref2903" refString="Cleve, P. T. & Grunow, A. (1880) Beitrage zur Kenntniss der arctischen Diatomeen. Kongliga Svenska Vetenskaps-Akademiens Handlingar 17 (2): 1 - 121." type="journal article" year="1880">Cleve & Grunow 1880: 54</bibRefCitation>
|
||
). Based on
|
||
<bibRefCitation author="Lange-Bertalot, H. & Hofmann, G. & Werum, M. & Cantonati, M." box="[503,820,1432,1458]" pageId="1" pageNumber="282" refId="ref3484" refString="Lange-Bertalot, H., Hofmann, G., Werum, M. & Cantonati, M. (2017) Freshwater benthic diatoms of Central Europe: over 800 common species used in ecological assessment. English edition with updated taxonomy and added species. Koeltz Botanical Books, Schmitten- Oberreifenberg, 942 pp." type="book" year="2017">
|
||
Lange-Bertalot
|
||
<emphasis box="[680,738,1432,1458]" italics="true" pageId="1" pageNumber="282">et al.</emphasis>
|
||
(2017)
|
||
</bibRefCitation>
|
||
and
|
||
<bibRefCitation author="Taylor, J. C. & Harding, W. R. & Archibald, C. G. M." box="[876,1100,1432,1458]" pageId="1" pageNumber="282" refId="ref3943" refString="Taylor, J. C., Harding, W. R. & Archibald, C. G. M. (2007) An Illustrated Guide to Some Common Diatom Species from South Africa An Illustrated Guide to Some Common Diatom Species from South Africa. WRC Report No TT 282 / 07. Water Research Commission, Pretoria, pp. 1 - 178 pls." type="book" year="2007">
|
||
Taylor
|
||
<emphasis box="[957,1015,1432,1458]" italics="true" pageId="1" pageNumber="282">et al.</emphasis>
|
||
(2007)
|
||
</bibRefCitation>
|
||
, this diatom flora is typical for eutrophic, freshwater with higher electrolyte content to even brackish, and β- to α-mesosaprobic conditions, pointing to a high degree of pollution.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection lastPageId="3" lastPageNumber="284" pageId="1" pageNumber="282" type="discussion">
|
||
<paragraph blockId="1.[136,1452,352,2071]" pageId="1" pageNumber="282">
|
||
<emphasis bold="true" box="[189,493,1540,1566]" pageId="1" pageNumber="282">Taxonomic comments:—</emphasis>
|
||
<tableCitation box="[493,582,1540,1566]" captionStart="TABLE 1" captionStartId="3.[136,219,702,723]" captionTargetPageId="3" captionText="TABLE 1. Table of comparison of several Planothidium taxa similar to P. africanum." pageId="1" pageNumber="282">Table 1</tableCitation>
|
||
lists the morphometric features of several similar
|
||
<taxonomicName box="[1197,1452,1540,1566]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" kingdom="Chromista" order="Achnanthales" pageId="1" pageNumber="282" phylum="Bacillariophyta" rank="species" species="undetermined">
|
||
<emphasis box="[1197,1349,1540,1566]" italics="true" pageId="1" pageNumber="282">Planothidium</emphasis>
|
||
species.
|
||
</taxonomicName>
|
||
<taxonomicName authorityName="Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C. E. Wetzel" authorityYear="2023" box="[136,411,1576,1602]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="1" pageNumber="282" phylum="Bacillariophyta" rank="species" species="africanum">
|
||
<emphasis box="[136,411,1576,1602]" italics="true" pageId="1" pageNumber="282">Planothidium africanum</emphasis>
|
||
</taxonomicName>
|
||
has a distinct cavum, excluding several species bearing a comparable valve outline but with a sinus from being conspecific.
|
||
<taxonomicName authority="Stancheva & N. Kristan" authorityName="Stancheva & N. Kristan" box="[499,1073,1612,1639]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="1" pageNumber="282" phylum="Bacillariophyta" rank="species" species="californicum">
|
||
<emphasis box="[499,802,1612,1638]" italics="true" pageId="1" pageNumber="282">Planothidium californicum</emphasis>
|
||
Stancheva & N.Kristan
|
||
</taxonomicName>
|
||
(in
|
||
<bibRefCitation author="Stancheva, R. & Kristan, N. V. & Kristan, W. & Sheath, R. G." box="[1121,1396,1612,1638]" pageId="1" pageNumber="282" pagination="1 - 30" refId="ref3871" refString="Stancheva, R., Kristan, N. V., Kristan, W. B, III & Sheath, R. G. (2020) Diatom genus Planothidium (Bacillariophyta) from streams and rivers in California, USA: diversity, distribution and autecology. Phytotaxa 470 (1): 1 - 30. https: // doi. org / 10.11646 / phytotaxa. 470.1.1" type="journal article" year="2020">
|
||
Stancheva
|
||
<emphasis box="[1245,1302,1612,1638]" italics="true" pageId="1" pageNumber="282">et al.</emphasis>
|
||
2020: 8
|
||
</bibRefCitation>
|
||
) has a similar valve outline and similar valve dimensions, but lacks the typical cavum and hence can be relatively easily separated from the new species.
|
||
<taxonomicName authorityName="Werum & Lange-Bertalot" authorityYear="2004" box="[496,738,1684,1710]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="1" pageNumber="282" phylum="Bacillariophyta" rank="species" species="dubium">
|
||
<emphasis box="[496,738,1684,1710]" italics="true" pageId="1" pageNumber="282">Planothidium dubium</emphasis>
|
||
</taxonomicName>
|
||
(Grunow in
|
||
<bibRefCitation author="Cleve, P. T. & Grunow, A." box="[880,1176,1684,1710]" pageId="1" pageNumber="282" pagination="1 - 121" refId="ref2903" refString="Cleve, P. T. & Grunow, A. (1880) Beitrage zur Kenntniss der arctischen Diatomeen. Kongliga Svenska Vetenskaps-Akademiens Handlingar 17 (2): 1 - 121." type="journal article" year="1880">Cleve & Grunow 1880: 23</bibRefCitation>
|
||
)
|
||
<bibRefCitation author="Round, F. E. & Bukhtiyarova, L." pageId="1" pageNumber="282" pagination="345 - 361" refId="ref3773" refString="Round, F. E. & Bukhtiyarova, L. (1996) Four new genera based on Achnanthes (Achnanthidium) together with a re-definition of Achnanthidium. Diatom Research 11 (2): 345 - 361. https: // doi. org / 10.1080 / 0269249 X. 1996.9705389" type="journal article" year="1996">Round & Bukhtiyarova (1996: 352)</bibRefCitation>
|
||
and
|
||
<taxonomicName authority="Lange-Bertalot & Werum" authorityName="Lange-Bertalot & Werum" box="[334,790,1720,1747]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="1" pageNumber="282" phylum="Bacillariophyta" rank="species" species="reichardtii">
|
||
<emphasis box="[334,484,1720,1746]" italics="true" pageId="1" pageNumber="282">P. reichardtii</emphasis>
|
||
Lange-Bertalot & Werum
|
||
</taxonomicName>
|
||
(in
|
||
<bibRefCitation author="Werum, M. & Lange-Bertalot, H." box="[842,1267,1720,1747]" pageId="1" pageNumber="282" pagination="3 - 417" refId="ref4385" refString="Werum, M. & Lange-Bertalot, H. (2004) Diatoms in springs from Central Europe and elsewhere under the influence of hydrologeology and anthropogenic impacts. Iconographia Diatomologica 13: 3 - 417." type="journal article" year="2004">Werum & Lange-Bertalot 2004: 172</bibRefCitation>
|
||
) have a similar elliptic-lanceolate valve outline with truncated, rostrate apices and an asymmetrical central area in the raphe-bearing valve. But both taxa also lack the distinct cavum structure excluding hence all conspecificity. The African species discussed in
|
||
<bibRefCitation author="N'Guessan, K. R. & Wetzel, C. E. & Ector, L. & Coste, M. & Cocquyt, C. & Van de Vijver, B. & Yao, S. S. & Ouattara, A. & Kouamelan, E. P. & Rosebery, J." box="[280,550,1828,1854]" pageId="1" pageNumber="282" pagination="455 - 462" refId="ref3565" refString="N'Guessan, K. R., Wetzel, C. E. Ector, L., Coste, M., C. Cocquyt, C., Van de Vijver, B., Yao, S. S., Ouattara, A., Kouamelan, E. P. & Tison- Rosebery, J. (2014) Planothidium comperei sp. nov. (Bacillariophyta), a new diatom species from Ivory Coast. Plant Ecology and Evolution 147 (3): 455 - 462. https: // doi. org / 10.5091 / plecevo. 2014.981" type="journal article" year="2014">
|
||
N’Guessan
|
||
<emphasis box="[411,468,1828,1854]" italics="true" pageId="1" pageNumber="282">et al.</emphasis>
|
||
(2014)
|
||
</bibRefCitation>
|
||
sufficiently differ not to be confused with
|
||
<taxonomicName authorityName="Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C. E. Wetzel" authorityYear="2023" box="[1031,1174,1828,1854]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="1" pageNumber="282" phylum="Bacillariophyta" rank="species" species="africanum">
|
||
<emphasis box="[1031,1174,1828,1854]" italics="true" pageId="1" pageNumber="282">P. africanum</emphasis>
|
||
</taxonomicName>
|
||
.
|
||
<taxonomicName box="[1188,1451,1828,1854]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="1" pageNumber="282" phylum="Bacillariophyta" rank="species" species="comperei">
|
||
<emphasis box="[1188,1451,1828,1854]" italics="true" pageId="1" pageNumber="282">Planothidium comperei</emphasis>
|
||
</taxonomicName>
|
||
shows the highest resemblance based on its valve outline, although most valves have more convex valve margins. The stria structure of the rapheless valve also shows some similarity with the multiseriate nature of the striae at the valve margins becoming biseriate near the axial area. But the species can be separated from
|
||
<taxonomicName authorityName="Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C. E. Wetzel" authorityYear="2023" box="[1087,1228,1936,1962]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="1" pageNumber="282" phylum="Bacillariophyta" rank="species" species="africanum">
|
||
<emphasis box="[1087,1228,1936,1962]" italics="true" pageId="1" pageNumber="282">P. africanum</emphasis>
|
||
</taxonomicName>
|
||
in having an almost symmetrical central area in the raphe-bearing valve with a more radiate striation pattern, contrary to
|
||
<taxonomicName authorityName="Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C. E. Wetzel" authorityYear="2023" box="[1306,1451,1972,1998]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="1" pageNumber="282" phylum="Bacillariophyta" rank="species" species="africanum">
|
||
<emphasis box="[1306,1451,1972,1998]" italics="true" pageId="1" pageNumber="282">P. africanum</emphasis>
|
||
</taxonomicName>
|
||
having more parallel striae and a distinctly asymmetrical central area with on one side an almost complete lack of (or very shortened) striae.
|
||
</paragraph>
|
||
<caption ID-DOI="http://doi.org/10.5281/zenodo.7703862" ID-Zenodo-Dep="7703862" httpUri="https://zenodo.org/record/7703862/files/figure.png" pageId="2" pageNumber="283" startId="2.[136,248,1642,1664]" targetBox="[273,1313,187,1615]" targetPageId="2">
|
||
<paragraph blockId="2.[136,1452,1642,1917]" pageId="2" pageNumber="283">
|
||
<emphasis bold="true" box="[136,310,1642,1664]" pageId="2" pageNumber="283">FIGURES 1–35.</emphasis>
|
||
<taxonomicName authority="Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C.E.Wetzel" authorityName="Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C. E. Wetzel" authorityYear="2023" box="[316,1448,1643,1665]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="2" pageNumber="283" phylum="Bacillariophyta" rank="species" species="africanum" status="sp. nov.">
|
||
<emphasis box="[316,552,1643,1664]" italics="true" pageId="2" pageNumber="283">Planothidium africanum</emphasis>
|
||
Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C.E.Wetzel
|
||
</taxonomicName>
|
||
,
|
||
<taxonomicNameLabel box="[136,211,1679,1700]" pageId="2" pageNumber="283" rank="species">sp. nov.</taxonomicNameLabel>
|
||
LM and SEM pictures taken from the holotype slide (BR-4778, Brook near Morogoro, Tanzania, sample L10 Stone). Figs 1–14. LM diminution series of the rapheless valve. Figs 15–28. LM diminution series of the raphebearing valve. Fig. 29. SEM external view of an entire rapheless valve. Fig. 30. SEM internal view of an entire rapheless valve. Fig. 31. SEM external view of an entire raphebearing valve. Fig. 32. SEM internal view of an entire raphe-bearing valve. Fig. 33. SEM external detail of the valve apex of a rapheless valve showing the structure of the striae. Note the mantle striae composed of irregular groupings of areolae. Fig. 34. SEM external detail of the girdle. Fig. 35. SEM internal detail of the cavum spanning the neighboring striae. Scale bars represent 10 µm except for Figs 33–35 where scale bar = 1 µm.
|
||
</paragraph>
|
||
</caption>
|
||
<paragraph blockId="3.[136,1452,158,653]" pageId="3" pageNumber="284">
|
||
The most similar species is
|
||
<taxonomicName authority="C. E. Wetzel, Van de Vijver & Ector" authorityName="C. E. Wetzel, Van de Vijver & Ector" box="[523,1105,158,185]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="3" pageNumber="284" phylum="Bacillariophyta" rank="species" species="incuriatum">
|
||
<emphasis box="[523,678,159,184]" italics="true" pageId="3" pageNumber="284">P. incuriatum</emphasis>
|
||
C.E.Wetzel, Van de Vijver & Ector
|
||
</taxonomicName>
|
||
, split off from
|
||
<taxonomicName authority="(M. H. Hohn & Hellerman 1963: 273) Lange-Bertalot (1999: 275)" authorityName="Lange-Bertalot" authorityPageNumber="275" authorityYear="1999" baseAuthorityName="M. H. Hohn & Hellerman" baseAuthorityPageNumber="273" baseAuthorityYear="1963" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="3" pageNumber="284" phylum="Bacillariophyta" rank="species" species="biporomum">
|
||
<emphasis box="[1291,1451,158,184]" italics="true" pageId="3" pageNumber="284">P. biporomum</emphasis>
|
||
(M.H.
|
||
<bibRefCitation author="Hohn, M. H. & Hellerman, J." box="[199,550,194,220]" pageId="3" pageNumber="284" pagination="250 - 329" refId="ref3133" refString="Hohn, M. H. & Hellerman, J. (1963) The taxonomy and structure of diatom populations from three eastern North American rivers using three sampling methods. Transactions of the American Microscopical Society 82 (3): 250 - 329." type="journal article" year="1963">Hohn & Hellerman 1963: 273</bibRefCitation>
|
||
)
|
||
<bibRefCitation author="Lange-Bertalot, H." box="[568,880,194,221]" pageId="3" pageNumber="284" pagination="270 - 283" refId="ref3457" refString="Lange-Bertalot, H. (1999) Neue Kombinationen von Taxa aus Achnanthes Bory (sensu lato). Iconographia Diatomologica 6: 270 - 283." type="journal article" year="1999">Lange-Bertalot (1999: 275)</bibRefCitation>
|
||
</taxonomicName>
|
||
in 2013. Most likely,
|
||
<taxonomicName authorityName="Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C. E. Wetzel" authorityYear="2023" box="[1138,1282,194,220]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="3" pageNumber="284" phylum="Bacillariophyta" rank="species" species="africanum">
|
||
<emphasis box="[1138,1282,194,220]" italics="true" pageId="3" pageNumber="284">P. africanum</emphasis>
|
||
</taxonomicName>
|
||
,
|
||
<taxonomicName box="[1299,1451,195,220]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="3" pageNumber="284" phylum="Bacillariophyta" rank="species" species="incuriatum">
|
||
<emphasis box="[1299,1451,195,220]" italics="true" pageId="3" pageNumber="284">P. incuriatum</emphasis>
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName authorityName="Lange-Bertalot" authorityYear="1999" baseAuthorityName="M. H. Hohn & Hellerman" baseAuthorityYear="1963" box="[186,343,230,256]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="3" pageNumber="284" phylum="Bacillariophyta" rank="species" species="biporomum">
|
||
<emphasis box="[186,343,230,256]" italics="true" pageId="3" pageNumber="284">P. biporomum</emphasis>
|
||
</taxonomicName>
|
||
are close to each other, given a similar shape in cavum structure, a similar stria structure with a multiseriate base at the valve margin and a biseriate part at the axial area, and similar shallow markings in the axial and central area. However,
|
||
<taxonomicName box="[441,723,302,328]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="3" pageNumber="284" phylum="Bacillariophyta" rank="species" species="incuriatum">
|
||
<emphasis box="[441,723,302,328]" italics="true" pageId="3" pageNumber="284">Planothidium incuriatum</emphasis>
|
||
</taxonomicName>
|
||
has a more elongated, slender valve outline with more protracted apices, a symmetrical central area in the raphe-bearing valves (contrary to the distinctly asymmetrical central area in
|
||
<taxonomicName authorityName="Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C. E. Wetzel" authorityYear="2023" box="[136,280,374,400]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="3" pageNumber="284" phylum="Bacillariophyta" rank="species" species="africanum">
|
||
<emphasis box="[136,280,374,400]" italics="true" pageId="3" pageNumber="284">P. africanum</emphasis>
|
||
</taxonomicName>
|
||
) and slightly wider valves (6.5–7.0 µm versus 5.5–6.5 µm in
|
||
<taxonomicName authorityName="Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C. E. Wetzel" authorityYear="2023" box="[986,1130,374,400]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="3" pageNumber="284" phylum="Bacillariophyta" rank="species" species="africanum">
|
||
<emphasis box="[986,1130,374,400]" italics="true" pageId="3" pageNumber="284">P. africanum</emphasis>
|
||
</taxonomicName>
|
||
). The striae in the rapheless valve of
|
||
<taxonomicName authorityName="Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C. E. Wetzel" authorityYear="2023" box="[236,379,410,436]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="3" pageNumber="284" phylum="Bacillariophyta" rank="species" species="africanum">
|
||
<emphasis box="[236,379,410,436]" italics="true" pageId="3" pageNumber="284">P. africanum</emphasis>
|
||
</taxonomicName>
|
||
have a distinct grouping of 3 series of areolae at the valve margin, a feature not observed in
|
||
<taxonomicName class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="3" pageNumber="284" phylum="Bacillariophyta" rank="species" species="incuriatum">
|
||
<emphasis italics="true" pageId="3" pageNumber="284">P. incuriatum</emphasis>
|
||
</taxonomicName>
|
||
that have a very faint third series of areolae at the margin (see for instance Wetzel
|
||
<emphasis box="[1176,1231,446,472]" italics="true" pageId="3" pageNumber="284">et al.</emphasis>
|
||
2003, fig. 51). This grouping is also visible in the mantle areolae (
|
||
<figureCitation box="[647,730,482,508]" captionStart="FIGURES 1–35" captionStartId="2.[136,248,1642,1664]" captionTargetBox="[273,1313,187,1615]" captionTargetId="figure-31@2.[273,1313,187,1615]" captionTargetPageId="2" captionText="FIGURES 1–35. Planothidium africanum Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C.E.Wetzel, sp. nov. LM and SEM pictures taken from the holotype slide (BR-4778, Brook near Morogoro, Tanzania, sample L10 Stone). Figs 1–14. LM diminution series of the rapheless valve. Figs 15–28. LM diminution series of the raphebearing valve. Fig. 29. SEM external view of an entire rapheless valve. Fig. 30. SEM internal view of an entire rapheless valve. Fig. 31. SEM external view of an entire raphebearing valve. Fig. 32. SEM internal view of an entire raphe-bearing valve. Fig. 33. SEM external detail of the valve apex of a rapheless valve showing the structure of the striae. Note the mantle striae composed of irregular groupings of areolae. Fig. 34. SEM external detail of the girdle. Fig. 35. SEM internal detail of the cavum spanning the neighboring striae. Scale bars represent 10 µm except for Figs 33–35 where scale bar = 1 µm." figureDoi="http://doi.org/10.5281/zenodo.7703862" httpUri="https://zenodo.org/record/7703862/files/figure.png" pageId="3" pageNumber="284">Fig. 33</figureCitation>
|
||
). Finally, other rostrate, cavum-bearing taxa such as
|
||
<taxonomicName authorityName="Lange-Bertalot" authorityYear="1999" baseAuthorityName="Ostrup" baseAuthorityYear="1903" box="[1315,1451,483,508]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="3" pageNumber="284" phylum="Bacillariophyta" rank="species" species="rostratum">
|
||
<emphasis box="[1315,1451,483,508]" italics="true" pageId="3" pageNumber="284">P. rostratum</emphasis>
|
||
</taxonomicName>
|
||
(present in the same sample as
|
||
<taxonomicName authorityName="Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C. E. Wetzel" authorityYear="2023" box="[501,646,518,544]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="3" pageNumber="284" phylum="Bacillariophyta" rank="species" species="africanum">
|
||
<emphasis box="[501,646,518,544]" italics="true" pageId="3" pageNumber="284">P. africanum</emphasis>
|
||
</taxonomicName>
|
||
) and
|
||
<taxonomicName authority="Lange-Bertalot & Bak" authorityName="Lange-Bertalot & Bak" box="[716,1235,518,544]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="3" pageNumber="284" phylum="Bacillariophyta" rank="species" species="rostratoholarcticum">
|
||
<emphasis box="[716,969,518,544]" italics="true" pageId="3" pageNumber="284">P. rostratoholarcticum</emphasis>
|
||
Lange-Bertalot & Bąk
|
||
</taxonomicName>
|
||
(in Bąk & LangeBertalot 2014: 354) differ in having multiple slit-like grooves in their axial and central area, so far not observed in
|
||
<taxonomicName authorityName="Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C. E. Wetzel" authorityYear="2023" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="3" pageNumber="284" phylum="Bacillariophyta" rank="species" species="africanum">
|
||
<emphasis italics="true" pageId="3" pageNumber="284">P. africanum</emphasis>
|
||
</taxonomicName>
|
||
. Contrary,
|
||
<taxonomicName authorityName="Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C. E. Wetzel" authorityYear="2023" box="[380,524,590,616]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="3" pageNumber="284" phylum="Bacillariophyta" rank="species" species="africanum">
|
||
<emphasis box="[380,524,590,616]" italics="true" pageId="3" pageNumber="284">P. africanum</emphasis>
|
||
</taxonomicName>
|
||
possesses an irregular pattern of small, shallow depressions in the axial area, not seen in
|
||
<taxonomicName authorityName="Lange-Bertalot" authorityYear="1999" baseAuthorityName="Ostrup" baseAuthorityYear="1903" box="[222,358,627,652]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="3" pageNumber="284" phylum="Bacillariophyta" rank="species" species="rostratum">
|
||
<emphasis box="[222,358,627,652]" italics="true" pageId="3" pageNumber="284">P. rostratum</emphasis>
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName box="[413,663,626,652]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="3" pageNumber="284" phylum="Bacillariophyta" rank="species" species="rostratoholarcticum">
|
||
<emphasis box="[413,663,626,652]" italics="true" pageId="3" pageNumber="284">P. rostratoholarcticum</emphasis>
|
||
</taxonomicName>
|
||
.
|
||
</paragraph>
|
||
<caption box="[136,960,702,724]" pageId="3" pageNumber="284" startId="3.[136,219,702,723]" targetBox="[144,1444,741,1440]" targetIsTable="true" targetPageId="3">
|
||
<paragraph blockId="3.[136,960,702,724]" box="[136,960,702,724]" pageId="3" pageNumber="284">
|
||
<emphasis bold="true" box="[136,244,702,723]" pageId="3" pageNumber="284">TABLE 1.</emphasis>
|
||
Table of comparison of several
|
||
<taxonomicName authorityName="F.E.Round & L.Bukhtiyarova" authorityYear="1996" box="[552,683,702,723]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="3" pageNumber="284" phylum="Bacillariophyta" rank="genus">
|
||
<emphasis box="[552,683,702,723]" italics="true" pageId="3" pageNumber="284">Planothidium</emphasis>
|
||
</taxonomicName>
|
||
taxa similar to
|
||
<taxonomicName authorityName="Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C. E. Wetzel" authorityYear="2023" box="[832,955,702,724]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="3" pageNumber="284" phylum="Bacillariophyta" rank="species" species="africanum">
|
||
<emphasis box="[832,955,702,724]" italics="true" pageId="3" pageNumber="284">P. africanum</emphasis>
|
||
</taxonomicName>
|
||
.
|
||
</paragraph>
|
||
</caption>
|
||
<paragraph pageId="3" pageNumber="284">
|
||
<table box="[144,1444,741,1440]" gridcols="7" gridrows="9" pageId="3" pageNumber="284">
|
||
<tr box="[144,1444,741,799]" gridrow="0" pageId="3" pageNumber="284" rowspan-0="1">
|
||
<th box="[427,727,741,799]" gridcol="1" gridrow="0" pageId="3" pageNumber="284">source</th>
|
||
<th box="[747,862,741,799]" gridcol="2" gridrow="0" pageId="3" pageNumber="284">length (µm)</th>
|
||
<th box="[879,988,741,799]" gridcol="3" gridrow="0" pageId="3" pageNumber="284">width (µm)</th>
|
||
<th box="[1005,1121,741,799]" gridcol="4" gridrow="0" pageId="3" pageNumber="284">stria density (in 10 µm)</th>
|
||
<th box="[1141,1295,741,799]" gridcol="5" gridrow="0" pageId="3" pageNumber="284">number of areolae per stria</th>
|
||
<th box="[1318,1444,741,799]" gridcol="6" gridrow="0" pageId="3" pageNumber="284">Cavum/sinus</th>
|
||
</tr>
|
||
<tr box="[144,1444,819,877]" gridrow="1" pageId="3" pageNumber="284">
|
||
<th box="[144,403,819,877]" gridcol="0" gridrow="1" pageId="3" pageNumber="284">
|
||
<taxonomicName authorityName="Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C. E. Wetzel" authorityYear="2023" box="[144,379,837,858]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="3" pageNumber="284" phylum="Bacillariophyta" rank="species" species="africanum">
|
||
<emphasis box="[144,379,837,858]" italics="true" pageId="3" pageNumber="284">Planothidium africanum</emphasis>
|
||
</taxonomicName>
|
||
</th>
|
||
<td box="[427,727,819,877]" gridcol="1" gridrow="1" pageId="3" pageNumber="284">this study</td>
|
||
<td box="[747,862,819,877]" gridcol="2" gridrow="1" pageId="3" pageNumber="284">11–25</td>
|
||
<td box="[879,988,819,877]" gridcol="3" gridrow="1" pageId="3" pageNumber="284">5.5–6.5</td>
|
||
<td box="[1005,1121,819,877]" gridcol="4" gridrow="1" pageId="3" pageNumber="284">14–16</td>
|
||
<td box="[1141,1295,819,877]" gridcol="5" gridrow="1" pageId="3" pageNumber="284">2 becoming 3 at margins</td>
|
||
<td box="[1318,1444,819,877]" gridcol="6" gridrow="1" pageId="3" pageNumber="284">cavum</td>
|
||
</tr>
|
||
<tr box="[144,1444,916,939]" gridrow="2" pageId="3" pageNumber="284">
|
||
<th box="[144,403,916,939]" gridcol="0" gridrow="2" pageId="3" pageNumber="284">
|
||
<emphasis box="[144,403,917,938]" italics="true" pageId="3" pageNumber="284">Planothidium californicum</emphasis>
|
||
</th>
|
||
<td box="[427,727,916,939]" gridcol="1" gridrow="2" pageId="3" pageNumber="284">
|
||
<bibRefCitation author="Stancheva, R. & Kristan, N. V. & Kristan, W. & Sheath, R. G." box="[427,634,917,939]" pageId="3" pageNumber="284" pagination="1 - 30" refId="ref3871" refString="Stancheva, R., Kristan, N. V., Kristan, W. B, III & Sheath, R. G. (2020) Diatom genus Planothidium (Bacillariophyta) from streams and rivers in California, USA: diversity, distribution and autecology. Phytotaxa 470 (1): 1 - 30. https: // doi. org / 10.11646 / phytotaxa. 470.1.1" type="journal article" year="2020">
|
||
Stancheva
|
||
<emphasis box="[532,580,917,938]" italics="true" pageId="3" pageNumber="284">et al.</emphasis>
|
||
2020
|
||
</bibRefCitation>
|
||
</td>
|
||
<td box="[747,862,916,939]" gridcol="2" gridrow="2" pageId="3" pageNumber="284">10–20</td>
|
||
<td box="[879,988,916,939]" gridcol="3" gridrow="2" pageId="3" pageNumber="284">5.5–7.5</td>
|
||
<td box="[1005,1121,916,939]" gridcol="4" gridrow="2" pageId="3" pageNumber="284">15–18</td>
|
||
<td box="[1141,1295,916,939]" gridcol="5" gridrow="2" pageId="3" pageNumber="284">2</td>
|
||
<td box="[1318,1444,916,939]" gridcol="6" gridrow="2" pageId="3" pageNumber="284">
|
||
<emphasis bold="true" box="[1318,1370,916,938]" pageId="3" pageNumber="284">sinus</emphasis>
|
||
</td>
|
||
</tr>
|
||
<tr box="[144,1444,996,1019]" gridrow="3" pageId="3" pageNumber="284">
|
||
<th box="[144,403,996,1019]" gridcol="0" gridrow="3" pageId="3" pageNumber="284">
|
||
<emphasis box="[144,352,997,1018]" italics="true" pageId="3" pageNumber="284">Planothidium dubium</emphasis>
|
||
</th>
|
||
<td box="[427,727,996,1019]" gridcol="1" gridrow="3" pageId="3" pageNumber="284">
|
||
<bibRefCitation author="Werum, M. & Lange-Bertalot, H." box="[427,727,997,1019]" pageId="3" pageNumber="284" pagination="3 - 417" refId="ref4385" refString="Werum, M. & Lange-Bertalot, H. (2004) Diatoms in springs from Central Europe and elsewhere under the influence of hydrologeology and anthropogenic impacts. Iconographia Diatomologica 13: 3 - 417." type="journal article" year="2004">Werum & Lange-Bertalot 2004</bibRefCitation>
|
||
</td>
|
||
<td box="[747,862,996,1019]" gridcol="2" gridrow="3" pageId="3" pageNumber="284">10–20</td>
|
||
<td box="[879,988,996,1019]" gridcol="3" gridrow="3" pageId="3" pageNumber="284">5.5–7.5</td>
|
||
<td box="[1005,1121,996,1019]" gridcol="4" gridrow="3" pageId="3" pageNumber="284">13–20</td>
|
||
<td box="[1141,1295,996,1019]" gridcol="5" gridrow="3" pageId="3" pageNumber="284">?</td>
|
||
<td box="[1318,1444,996,1019]" gridcol="6" gridrow="3" pageId="3" pageNumber="284">
|
||
<emphasis bold="true" box="[1318,1370,996,1018]" pageId="3" pageNumber="284">sinus</emphasis>
|
||
</td>
|
||
</tr>
|
||
<tr box="[144,1444,1076,1099]" gridrow="4" pageId="3" pageNumber="284">
|
||
<th box="[144,403,1076,1099]" gridcol="0" gridrow="4" pageId="3" pageNumber="284">
|
||
<emphasis box="[144,381,1077,1098]" italics="true" pageId="3" pageNumber="284">Planothidium reichardtii</emphasis>
|
||
</th>
|
||
<td box="[427,727,1076,1099]" gridcol="1" gridrow="4" pageId="3" pageNumber="284">
|
||
<bibRefCitation author="Werum, M. & Lange-Bertalot, H." box="[427,727,1077,1099]" pageId="3" pageNumber="284" pagination="3 - 417" refId="ref4385" refString="Werum, M. & Lange-Bertalot, H. (2004) Diatoms in springs from Central Europe and elsewhere under the influence of hydrologeology and anthropogenic impacts. Iconographia Diatomologica 13: 3 - 417." type="journal article" year="2004">Werum & Lange-Bertalot 2004</bibRefCitation>
|
||
</td>
|
||
<td box="[747,862,1076,1099]" gridcol="2" gridrow="4" pageId="3" pageNumber="284">8–18</td>
|
||
<td box="[879,988,1076,1099]" gridcol="3" gridrow="4" pageId="3" pageNumber="284">4.0–6.5</td>
|
||
<td box="[1005,1121,1076,1099]" gridcol="4" gridrow="4" pageId="3" pageNumber="284">13–15</td>
|
||
<td box="[1141,1295,1076,1099]" gridcol="5" gridrow="4" pageId="3" pageNumber="284">3</td>
|
||
<td box="[1318,1444,1076,1099]" gridcol="6" gridrow="4" pageId="3" pageNumber="284">
|
||
<emphasis bold="true" box="[1318,1370,1076,1098]" pageId="3" pageNumber="284">sinus</emphasis>
|
||
</td>
|
||
</tr>
|
||
<tr box="[144,1444,1157,1179]" gridrow="5" pageId="3" pageNumber="284">
|
||
<th box="[144,403,1157,1179]" gridcol="0" gridrow="5" pageId="3" pageNumber="284">
|
||
<emphasis box="[144,385,1157,1178]" italics="true" pageId="3" pageNumber="284">Planothidium incuriatum</emphasis>
|
||
</th>
|
||
<td box="[427,727,1157,1179]" gridcol="1" gridrow="5" pageId="3" pageNumber="284">
|
||
<bibRefCitation author="Wetzel, C. E. & Van de Vijver, B. & Hoffmann, L. & Ector, L." box="[427,601,1157,1179]" pageId="3" pageNumber="284" pagination="43 - 57" refId="ref4158" refString="Wetzel, C. E., Van de Vijver, B., Hoffmann, L. & Ector, L. (2013) Planothidium incuriatum sp. nov. a widely distributed diatom species (Bacillariophyta) and type analysis of Planothidium biporomum. Phytotaxa 138 (1): 43 - 57. https: // dx. doi. org / 10.11646 / phytotaxa. 138.1.6" type="journal article" year="2013">
|
||
Wetzel
|
||
<emphasis box="[499,548,1157,1178]" italics="true" pageId="3" pageNumber="284">et al.</emphasis>
|
||
2013
|
||
</bibRefCitation>
|
||
</td>
|
||
<td box="[747,862,1157,1179]" gridcol="2" gridrow="5" pageId="3" pageNumber="284">18–25</td>
|
||
<td box="[879,988,1157,1179]" gridcol="3" gridrow="5" pageId="3" pageNumber="284">6.5–7.0</td>
|
||
<td box="[1005,1121,1157,1179]" gridcol="4" gridrow="5" pageId="3" pageNumber="284">13–15</td>
|
||
<td box="[1141,1295,1157,1179]" gridcol="5" gridrow="5" pageId="3" pageNumber="284">3</td>
|
||
<td box="[1318,1444,1157,1179]" gridcol="6" gridrow="5" pageId="3" pageNumber="284">cavum</td>
|
||
</tr>
|
||
<tr box="[144,1444,1219,1277]" gridrow="6" pageId="3" pageNumber="284">
|
||
<th box="[144,403,1219,1277]" gridcol="0" gridrow="6" pageId="3" pageNumber="284">
|
||
<emphasis box="[144,390,1237,1258]" italics="true" pageId="3" pageNumber="284">Planothidium biporomum</emphasis>
|
||
</th>
|
||
<td box="[427,727,1219,1277]" gridcol="1" gridrow="6" pageId="3" pageNumber="284">
|
||
<bibRefCitation author="Wetzel, C. E. & Van de Vijver, B. & Hoffmann, L. & Ector, L." box="[427,601,1237,1259]" pageId="3" pageNumber="284" pagination="43 - 57" refId="ref4158" refString="Wetzel, C. E., Van de Vijver, B., Hoffmann, L. & Ector, L. (2013) Planothidium incuriatum sp. nov. a widely distributed diatom species (Bacillariophyta) and type analysis of Planothidium biporomum. Phytotaxa 138 (1): 43 - 57. https: // dx. doi. org / 10.11646 / phytotaxa. 138.1.6" type="journal article" year="2013">
|
||
Wetzel
|
||
<emphasis box="[499,548,1237,1258]" italics="true" pageId="3" pageNumber="284">et al.</emphasis>
|
||
2013
|
||
</bibRefCitation>
|
||
</td>
|
||
<td box="[747,862,1219,1277]" gridcol="2" gridrow="6" pageId="3" pageNumber="284">13–26</td>
|
||
<td box="[879,988,1219,1277]" gridcol="3" gridrow="6" pageId="3" pageNumber="284">6.0–7.0</td>
|
||
<td box="[1005,1121,1219,1277]" gridcol="4" gridrow="6" pageId="3" pageNumber="284">13–15</td>
|
||
<td box="[1141,1295,1219,1277]" gridcol="5" gridrow="6" pageId="3" pageNumber="284">2 becoming 1 at the sternum</td>
|
||
<td box="[1318,1444,1219,1277]" gridcol="6" gridrow="6" pageId="3" pageNumber="284">cavum</td>
|
||
</tr>
|
||
<tr box="[144,1444,1317,1339]" gridrow="7" pageId="3" pageNumber="284">
|
||
<th box="[144,403,1317,1339]" gridcol="0" gridrow="7" pageId="3" pageNumber="284">
|
||
<emphasis box="[144,374,1317,1338]" italics="true" pageId="3" pageNumber="284">Planothidium rostratum</emphasis>
|
||
</th>
|
||
<td box="[427,727,1317,1339]" gridcol="1" gridrow="7" pageId="3" pageNumber="284">
|
||
<bibRefCitation author="Wetzel, C. E. & Van de Vijver, B. & Blanco, S. & Ector, L." box="[427,601,1317,1339]" pageId="3" pageNumber="284" pagination="50 - 89" refId="ref4323" refString="Wetzel, C. E., Van de Vijver, B., Blanco, S. & Ector, L. (2019) On some common and new cavum-bearing Planothidium (Bacillariophyta) species from freshwater. Fottea 19 (1): 50 - 89. https: // doi. org / 10.5507 / fot. 2018.016" type="journal article" year="2019">
|
||
Wetzel
|
||
<emphasis box="[499,548,1317,1338]" italics="true" pageId="3" pageNumber="284">et al.</emphasis>
|
||
2019
|
||
</bibRefCitation>
|
||
</td>
|
||
<td box="[747,862,1317,1339]" gridcol="2" gridrow="7" pageId="3" pageNumber="284">6.5–15</td>
|
||
<td box="[879,988,1317,1339]" gridcol="3" gridrow="7" pageId="3" pageNumber="284">4.0–6.5</td>
|
||
<td box="[1005,1121,1317,1339]" gridcol="4" gridrow="7" pageId="3" pageNumber="284">12–16</td>
|
||
<td box="[1141,1295,1317,1339]" gridcol="5" gridrow="7" pageId="3" pageNumber="284">4–5</td>
|
||
<td box="[1318,1444,1317,1339]" gridcol="6" gridrow="7" pageId="3" pageNumber="284">cavum</td>
|
||
</tr>
|
||
<tr box="[144,1444,1383,1440]" gridrow="8" pageId="3" pageNumber="284">
|
||
<th box="[144,403,1383,1440]" gridcol="0" gridrow="8" pageId="3" pageNumber="284">
|
||
<emphasis box="[144,336,1383,1440]" italics="true" pageId="3" pageNumber="284">Planothidium rostratoholarcticum</emphasis>
|
||
</th>
|
||
<td box="[427,727,1383,1440]" gridcol="1" gridrow="8" pageId="3" pageNumber="284">
|
||
<bibRefCitation author="Bak, M. & Lange-Bertalot, H." box="[427,696,1401,1423]" pageId="3" pageNumber="284" pagination="346 - 359" refId="ref2758" refString="Bak, M. & Lange-Bertalot, H. (2014) Four small-celled Planothidium species from Central Europe proposed as new to science. Oceanological and Hydrobiological Studies 43 (4): 346 - 359. https: // doi. org / 10.2478 / s 13545 - 014 - 0152 - 9" type="journal article" year="2014">Bąk & Lange-Bertalot 2014</bibRefCitation>
|
||
</td>
|
||
<td box="[747,862,1383,1440]" gridcol="2" gridrow="8" pageId="3" pageNumber="284">6.5–13.5</td>
|
||
<td box="[879,988,1383,1440]" gridcol="3" gridrow="8" pageId="3" pageNumber="284">4.0–6.5</td>
|
||
<td box="[1005,1121,1383,1440]" gridcol="4" gridrow="8" pageId="3" pageNumber="284">13–17</td>
|
||
<td box="[1141,1295,1383,1440]" gridcol="5" gridrow="8" pageId="3" pageNumber="284">3</td>
|
||
<td box="[1318,1444,1383,1440]" gridcol="6" gridrow="8" pageId="3" pageNumber="284">cavum</td>
|
||
</tr>
|
||
</table>
|
||
</paragraph>
|
||
<paragraph blockId="3.[136,1452,1496,1630]" pageId="3" pageNumber="284">
|
||
<bibRefCitation author="Wetzel, C. E. & Van de Vijver, B. & Blanco, S. & Ector, L." box="[189,410,1496,1522]" pageId="3" pageNumber="284" pagination="50 - 89" refId="ref4323" refString="Wetzel, C. E., Van de Vijver, B., Blanco, S. & Ector, L. (2019) On some common and new cavum-bearing Planothidium (Bacillariophyta) species from freshwater. Fottea 19 (1): 50 - 89. https: // doi. org / 10.5507 / fot. 2018.016" type="journal article" year="2019">
|
||
Wetzel
|
||
<emphasis box="[273,329,1496,1522]" italics="true" pageId="3" pageNumber="284">et al.</emphasis>
|
||
(2019)
|
||
</bibRefCitation>
|
||
discuss several small-celled cavum-bearing
|
||
<taxonomicName box="[907,1146,1496,1522]" pageId="3" pageNumber="284">
|
||
<emphasis box="[907,1059,1496,1522]" italics="true" pageId="3" pageNumber="284">Planothidium</emphasis>
|
||
species
|
||
</taxonomicName>
|
||
such as
|
||
<taxonomicName authorityName="Lange-Bertalot" authorityYear="1999" baseAuthorityName="Lange-Bertalot" baseAuthorityYear="1993" box="[1240,1451,1496,1522]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="3" pageNumber="284" phylum="Bacillariophyta" rank="species" species="frequentissimum">
|
||
<emphasis box="[1240,1451,1496,1522]" italics="true" pageId="3" pageNumber="284">P. frequentissimum</emphasis>
|
||
</taxonomicName>
|
||
but they can all be separated based on their valve dimensions (usually shorter and/or narrower), shape of the apices (typically broadly rounded, hardly protracted in
|
||
<taxonomicName authorityName="Lange-Bertalot" authorityYear="1999" baseAuthorityName="Lange-Bertalot" baseAuthorityYear="1993" box="[700,915,1568,1594]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="3" pageNumber="284" phylum="Bacillariophyta" rank="species" species="frequentissimum">
|
||
<emphasis box="[700,915,1568,1594]" italics="true" pageId="3" pageNumber="284">P. frequentissimum</emphasis>
|
||
</taxonomicName>
|
||
) and valve outline, most of them being more strictly lanceolate instead of the elliptic-lanceolate valves observed in
|
||
<taxonomicName authorityName="Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C. E. Wetzel" authorityYear="2023" box="[922,1065,1604,1630]" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" pageId="3" pageNumber="284" phylum="Bacillariophyta" rank="species" species="africanum">
|
||
<emphasis box="[922,1065,1604,1630]" italics="true" pageId="3" pageNumber="284">P. africanum</emphasis>
|
||
</taxonomicName>
|
||
.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |