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<document id="373AE516D12D6507B784333D05D76F22" ID-DOI="10.11646/phytotaxa.652.4.2" ID-ISSN="1179-3163" ID-Zenodo-Dep="13216815" IM.bibliography_approvedBy="carolina" IM.illustrations_approvedBy="carolina" IM.materialsCitations_approvedBy="carolina" IM.tables_approvedBy="carolina" IM.taxonomicNames_approvedBy="felipe" IM.treatments_approvedBy="carolina" checkinTime="1722603448919" checkinUser="felipe" docAuthor="Rodionova, Yelena V., Pomazkina, Galina V. &amp; Sherbakova, Tatyana A." docDate="2024" docId="03DE474AFFDBFF8E3F8FD1C89F8321F4" docLanguage="en" docName="phytotaxa.652.4.2.pdf" docOrigin="Phytotaxa 652 (4)" docSource="http://dx.doi.org/10.11646/phytotaxa.652.4.2" docStyle="DocumentStyle:96748F8F1B6C902996E134952A3A36B9.13:Phytotaxa.2014-.journal_article" docStyleId="96748F8F1B6C902996E134952A3A36B9" docStyleName="Phytotaxa.2014-.journal_article" docStyleVersion="13" docTitle="Lacustriella acutocuneata Metzeltin, Lange-Bertalot &amp; Kulikovskiy 2012" docType="treatment" docVersion="3" lastPageNumber="264" masterDocId="FFE73F32FFD8FF8D3F07D4429B0F2634" masterDocTitle="Two new species of the genus Lacustriella (Bacillariophyta) from Lake Baikal" masterLastPageNumber="272" masterPageNumber="261" pageNumber="264" updateTime="1724864162430" updateUser="carolina" zenodo-license-figures="UNSPECIFIED" zenodo-license-treatments="UNSPECIFIED">
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<mods:title id="1E1F73BEC6C75B4EBBFDDB42E973C7EC">Two new species of the genus Lacustriella (Bacillariophyta) from Lake Baikal</mods:title>
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<mods:namePart id="063CB0429B91D3BB6426D9C4810AB2F2">Rodionova, Yelena V.</mods:namePart>
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<mods:namePart id="365813D7A4B3C738C0744E88643CF38A">Pomazkina, Galina V.</mods:namePart>
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<mods:namePart id="87FEA8C8E0F03166299F06122F104356">Sherbakova, Tatyana A.</mods:namePart>
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<mods:title id="3B3B6C9822003BB844C41364D6381E20">Phytotaxa</mods:title>
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<mods:date id="A0D6BCFF05E0A68B384D6F1937B70DCA">2024</mods:date>
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<mods:number id="4088750C0835868BB8B3B44997D0BCCF">652</mods:number>
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<paragraph id="8BC8F65CFFDBFF8E3F8FD1C898C32390" blockId="3.[136,972,1418,1445]" box="[136,972,1418,1445]" pageId="3" pageNumber="264">
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<taxonomicName id="4C778DDFFFDBFF8E3F8FD1C898C32390" authority="Metzeltin, Lange-Bertalot &amp; Kulikovskiy 2012" authorityName="Metzeltin, Lange-Bertalot &amp; Kulikovskiy" authorityYear="2012" box="[136,972,1418,1445]" class="Bacillariophyceae" genus="Lacustriella" higherTaxonomySource="GBIF" kingdom="Chromista" pageId="3" pageNumber="264" phylum="Ochrophyta" rank="species" species="acutocuneata">
<emphasis id="B9032A4EFFDBFF8E3F8FD1C89AB92391" bold="true" box="[136,438,1418,1445]" italics="true" pageId="3" pageNumber="264">Lacustriella acutocuneata</emphasis>
Metzeltin, Lange-Bertalot &amp;
<bibRefCitation id="EFE68BADFFDBFF8E3C04D1C898C32390" author="Kulikovskiy, M. S. &amp; Lange-Bertalot, H. &amp; Metzeltin, D. &amp; Witksowski, A." box="[771,972,1418,1444]" pageId="3" pageNumber="264" pagination="1 - 607" refId="ref5060" refString="Kulikovskiy, M. S., Lange-Bertalot, H., Metzeltin, D. &amp; Witksowski, A. (2012) Lake Baikal: hotspot of endemic Diatoms, 1. Iconographia Diatomologica 23: 1 - 607." type="journal article" year="2012">Kulikovskiy 2012</bibRefCitation>
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</paragraph>
<paragraph id="8BC8F65CFFDBFF8E3F8FD1909A162048" blockId="3.[136,1452,1490,1985]" pageId="3" pageNumber="264">
Light microscopy (LM): (
<figureCitation id="134CEAD9FFDBFF8E3EB4D190993623D9" box="[435,569,1490,1517]" captionStart="FIGURES 4756" captionStartId="7.[136,248,1663,1685]" captionTargetBox="[164,1394,190,1608]" captionTargetId="figure-18@7.[164,1423,190,1639]" captionTargetPageId="7" captionText="FIGURES 4756. Lacustriella acutocuneata. LM. Figs 4756. Valve views." figureDoi="http://doi.org/10.5281/zenodo.13216825" httpUri="https://zenodo.org/record/13216825/files/figure.png" pageId="3" pageNumber="264">Figs 4756</figureCitation>
). Valves linear-elliptic-lanceolate with slightly concave margins and rostrate apices. Valve length 48.567.0 μm, width 1819 μm. External axial area narrow at apices, gradually expanding into the weakly defined central area. Raphe filiform, central endings straight, terminal ends bent to opposite sides. Striae uniseriate, slightly radial proximally, become radial towards apices,
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10 μm. One longitudinal canal along each margin.
</paragraph>
</subSubSection>
<subSubSection id="C36DA5D7FFDBFF8E3FBAD2C49F8321F4" pageId="3" pageNumber="264" type="description">
<paragraph id="8BC8F65CFFDBFF8E3FBAD2C49F1E214C" blockId="3.[136,1452,1490,1985]" pageId="3" pageNumber="264">
Scanning electron microscopy (SEM): (
<figureCitation id="134CEAD9FFDBFF8E3D77D2C499FE2095" box="[624,753,1670,1697]" captionStart="FIGURES 5764" captionStartId="8.[136,248,1913,1935]" captionTargetBox="[203,1402,420,1858]" captionTargetId="figure-143@8.[172,1416,389,1889]" captionTargetPageId="8" captionText="FIGURES 5764. Lacustriella acutocuneata. SEM external (Figs 5759, 6162) and internal views (Figs 60, 6364). Fig. 57. Valve view. Fig. 58. Smooth surface of the longitudinal canal, morphology of areolae bordering the canal. Fig. 59. Central area with proximal raphe endings; areolae in striae; a row of enlarged areolae along the axial area. Figs 6162. Distal raphe endings. Fig. 60. Valve view. Fig. 63. Central nodule, proximal raphe endings terminating in merged helictoglossae. Fig. 64. Distal raphe end with a helictoglossa. Scale bars = 10 μm (Figs 57, 60); 5 μm (Figs 59, 6164); 2 μm (Fig. 58)." figureDoi="http://doi.org/10.5281/zenodo.13216827" httpUri="https://zenodo.org/record/13216827/files/figure.png" pageId="3" pageNumber="264">Figs 5764</figureCitation>
). Externally, areolae in striae small, round, open, in depressions,
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10 μm, slightly irregular in the central part of the valve. Proximal areolae near axial and central areas enlarged, rounded (
<figureCitation id="134CEAD9FFDBFF8E3E66D28C9AB920DD" box="[353,438,1742,1769]" captionStart="FIGURES 5764" captionStartId="8.[136,248,1913,1935]" captionTargetBox="[203,1402,420,1858]" captionTargetId="figure-143@8.[172,1416,389,1889]" captionTargetPageId="8" captionText="FIGURES 5764. Lacustriella acutocuneata. SEM external (Figs 5759, 6162) and internal views (Figs 60, 6364). Fig. 57. Valve view. Fig. 58. Smooth surface of the longitudinal canal, morphology of areolae bordering the canal. Fig. 59. Central area with proximal raphe endings; areolae in striae; a row of enlarged areolae along the axial area. Figs 6162. Distal raphe endings. Fig. 60. Valve view. Fig. 63. Central nodule, proximal raphe endings terminating in merged helictoglossae. Fig. 64. Distal raphe end with a helictoglossa. Scale bars = 10 μm (Figs 57, 60); 5 μm (Figs 59, 6164); 2 μm (Fig. 58)." figureDoi="http://doi.org/10.5281/zenodo.13216827" httpUri="https://zenodo.org/record/13216827/files/figure.png" pageId="3" pageNumber="264">Fig. 58</figureCitation>
). Distal areolae along the longitudinal canals appear binary due to narrowed vimines (
<figureCitation id="134CEAD9FFDBFF8E3A7DD28C9BDF2139" captionStart="FIGURES 5764" captionStartId="8.[136,248,1913,1935]" captionTargetBox="[203,1402,420,1858]" captionTargetId="figure-143@8.[172,1416,389,1889]" captionTargetPageId="8" captionText="FIGURES 5764. Lacustriella acutocuneata. SEM external (Figs 5759, 6162) and internal views (Figs 60, 6364). Fig. 57. Valve view. Fig. 58. Smooth surface of the longitudinal canal, morphology of areolae bordering the canal. Fig. 59. Central area with proximal raphe endings; areolae in striae; a row of enlarged areolae along the axial area. Figs 6162. Distal raphe endings. Fig. 60. Valve view. Fig. 63. Central nodule, proximal raphe endings terminating in merged helictoglossae. Fig. 64. Distal raphe end with a helictoglossa. Scale bars = 10 μm (Figs 57, 60); 5 μm (Figs 59, 6164); 2 μm (Fig. 58)." figureDoi="http://doi.org/10.5281/zenodo.13216827" httpUri="https://zenodo.org/record/13216827/files/figure.png" pageId="3" pageNumber="264">Figs 58, 59</figureCitation>
), with the outer ones somewhat larger and elongate. The surface of longitudinal canals is smooth, unornamented (
<figureCitation id="134CEAD9FFDBFF8E3F97D3549BEB2105" box="[144,228,1814,1841]" captionStart="FIGURES 5764" captionStartId="8.[136,248,1913,1935]" captionTargetBox="[203,1402,420,1858]" captionTargetId="figure-143@8.[172,1416,389,1889]" captionTargetPageId="8" captionText="FIGURES 5764. Lacustriella acutocuneata. SEM external (Figs 5759, 6162) and internal views (Figs 60, 6364). Fig. 57. Valve view. Fig. 58. Smooth surface of the longitudinal canal, morphology of areolae bordering the canal. Fig. 59. Central area with proximal raphe endings; areolae in striae; a row of enlarged areolae along the axial area. Figs 6162. Distal raphe endings. Fig. 60. Valve view. Fig. 63. Central nodule, proximal raphe endings terminating in merged helictoglossae. Fig. 64. Distal raphe end with a helictoglossa. Scale bars = 10 μm (Figs 57, 60); 5 μm (Figs 59, 6164); 2 μm (Fig. 58)." figureDoi="http://doi.org/10.5281/zenodo.13216827" httpUri="https://zenodo.org/record/13216827/files/figure.png" pageId="3" pageNumber="264">Fig. 58</figureCitation>
). Proximal raphe endings lay in slightly elongated drop-shaped depressions (
<figureCitation id="134CEAD9FFDBFF8E3B30D3549F842105" box="[1079,1163,1814,1841]" captionStart="FIGURES 5764" captionStartId="8.[136,248,1913,1935]" captionTargetBox="[203,1402,420,1858]" captionTargetId="figure-143@8.[172,1416,389,1889]" captionTargetPageId="8" captionText="FIGURES 5764. Lacustriella acutocuneata. SEM external (Figs 5759, 6162) and internal views (Figs 60, 6364). Fig. 57. Valve view. Fig. 58. Smooth surface of the longitudinal canal, morphology of areolae bordering the canal. Fig. 59. Central area with proximal raphe endings; areolae in striae; a row of enlarged areolae along the axial area. Figs 6162. Distal raphe endings. Fig. 60. Valve view. Fig. 63. Central nodule, proximal raphe endings terminating in merged helictoglossae. Fig. 64. Distal raphe end with a helictoglossa. Scale bars = 10 μm (Figs 57, 60); 5 μm (Figs 59, 6164); 2 μm (Fig. 58)." figureDoi="http://doi.org/10.5281/zenodo.13216827" httpUri="https://zenodo.org/record/13216827/files/figure.png" pageId="3" pageNumber="264">Fig. 59</figureCitation>
). Distal endings smoothly curved to opposite sides and onto the mantle (
<figureCitation id="134CEAD9FFDBFF8E3D8AD378981E2160" box="[653,785,1850,1876]" captionStart="FIGURES 5764" captionStartId="8.[136,248,1913,1935]" captionTargetBox="[203,1402,420,1858]" captionTargetId="figure-143@8.[172,1416,389,1889]" captionTargetPageId="8" captionText="FIGURES 5764. Lacustriella acutocuneata. SEM external (Figs 5759, 6162) and internal views (Figs 60, 6364). Fig. 57. Valve view. Fig. 58. Smooth surface of the longitudinal canal, morphology of areolae bordering the canal. Fig. 59. Central area with proximal raphe endings; areolae in striae; a row of enlarged areolae along the axial area. Figs 6162. Distal raphe endings. Fig. 60. Valve view. Fig. 63. Central nodule, proximal raphe endings terminating in merged helictoglossae. Fig. 64. Distal raphe end with a helictoglossa. Scale bars = 10 μm (Figs 57, 60); 5 μm (Figs 59, 6164); 2 μm (Fig. 58)." figureDoi="http://doi.org/10.5281/zenodo.13216827" httpUri="https://zenodo.org/record/13216827/files/figure.png" pageId="3" pageNumber="264">Figs 61, 62</figureCitation>
). Internally, areolae in striae covered with hymenes. Raphe endings terminate on helictoglossae, central helictoglossae merged (
<figureCitation id="134CEAD9FFDBFF8E3C85D31C9F0B214C" box="[898,1028,1886,1912]" captionStart="FIGURES 5764" captionStartId="8.[136,248,1913,1935]" captionTargetBox="[203,1402,420,1858]" captionTargetId="figure-143@8.[172,1416,389,1889]" captionTargetPageId="8" captionText="FIGURES 5764. Lacustriella acutocuneata. SEM external (Figs 5759, 6162) and internal views (Figs 60, 6364). Fig. 57. Valve view. Fig. 58. Smooth surface of the longitudinal canal, morphology of areolae bordering the canal. Fig. 59. Central area with proximal raphe endings; areolae in striae; a row of enlarged areolae along the axial area. Figs 6162. Distal raphe endings. Fig. 60. Valve view. Fig. 63. Central nodule, proximal raphe endings terminating in merged helictoglossae. Fig. 64. Distal raphe end with a helictoglossa. Scale bars = 10 μm (Figs 57, 60); 5 μm (Figs 59, 6164); 2 μm (Fig. 58)." figureDoi="http://doi.org/10.5281/zenodo.13216827" httpUri="https://zenodo.org/record/13216827/files/figure.png" pageId="3" pageNumber="264">Figs 63, 64</figureCitation>
).
</paragraph>
<paragraph id="8BC8F65CFFDBFF8E3FBAD3C09F8321F4" blockId="3.[136,1452,1490,1985]" pageId="3" pageNumber="264">The species was commonly observed in many sites of all three basins of Lake Baikal, including Anga Bay, the vicinity of Cape Khoboi on Olkhon island, near Сape Tonkiy and the area of Cape Kabaniy.</paragraph>
</subSubSection>
</treatment>
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