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<document id="4BD226951AE808058BC43F70DF6784D4" 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="03DE474AFFDBFF8E3F8FD69C9FF92368" 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 provecta Sherbakova, Pomazkina &amp; Rodionova, sp. nov." 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="E4B5224F7F01609C75D80F902C117170">Two new species of the genus Lacustriella (Bacillariophyta) from Lake Baikal</mods:title>
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<mods:namePart id="F3D890D115C5907F3C53EDD9558F508C">Pomazkina, Galina V.</mods:namePart>
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<taxonomicName id="4C778DDFFFDBFF8E3F8FD69C983F24CC" authority="Sherbakova, Pomazkina &amp; Rodionova" authorityName="Sherbakova, Pomazkina &amp; Rodionova" box="[136,816,734,761]" class="Bacillariophyceae" genus="Lacustriella" higherTaxonomySource="GBIF" kingdom="Chromista" pageId="3" pageNumber="264" phylum="Ochrophyta" rank="species" species="provecta" status="sp. nov.">
<emphasis id="B9032A4EFFDBFF8E3F8FD69C9A7324CD" bold="true" box="[136,380,734,761]" italics="true" pageId="3" pageNumber="264">Lacustriella provecta</emphasis>
Sherbakova, Pomazkina
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Rodionova
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<emphasis id="B9032A4EFFDBFF8E3C30D69D988924CC" box="[823,902,735,760]" italics="true" pageId="3" pageNumber="264">sp. nov</emphasis>
.
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<subSubSection id="C36DA5D7FFDBFF8E3F8FD7649BBA229C" pageId="3" pageNumber="264" type="description">
<paragraph id="8BC8F65CFFDBFF8E3F8FD7649F9C2598" blockId="3.[136,1452,806,1373]" pageId="3" pageNumber="264">
Light microscopy (LM): (
<figureCitation id="134CEAD9FFDBFF8E3EAED76499222574" box="[425,557,806,832]" captionStart="FIGURES 2438" captionStartId="5.[136,248,1979,2001]" captionTargetBox="[215,1338,190,1922]" captionTargetId="figure-18@5.[215,1371,190,1955]" captionTargetPageId="5" captionText="FIGURES 2438. Lacustriella provecta sp. nov. LM micrographs showing morphological variations of valve views. Fig. 25. Holotype. Scale bar = 10 μm." figureDoi="http://doi.org/10.5281/zenodo.13216821" httpUri="https://zenodo.org/record/13216821/files/figure.png" pageId="3" pageNumber="264">Figs 2438</figureCitation>
). Valves linear lanceolate with slightly protracted apiculate apices. Valve length 3249 μm, width 1315 μm. External axial area narrow at apices, then gradually expanding towards a weakly defined central area. Raphe filiform, central endings straight, terminal ends bent oppositely. Striae uniseriate, slightly radial becoming radial towards apices,
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10 μm. One longitudinal canal along each margin.
</paragraph>
<paragraph id="8BC8F65CFFDBFF8E3FBAD7F49BBA229C" blockId="3.[136,1452,806,1373]" pageId="3" pageNumber="264">
Scanning electron microscopy (SEM): (
<figureCitation id="134CEAD9FFDBFF8E3D8DD7F4981E25E4" box="[650,785,950,976]" captionStart="FIGURES 3946" captionStartId="6.[136,248,1873,1895]" captionTargetBox="[227,1331,210,1817]" captionTargetId="figure-27@6.[223,1363,190,1849]" captionTargetPageId="6" captionText="FIGURES 3946. Lacustriella provecta sp. nov. from type material, SEM external (Figs 39, 4144) and internal views (Figs 40, 4546). Figs 39, 40. Valve views. Fig. 41. Central area with proximal raphe endings, irregular areolae in striae. Figs 4243. Distal raphe endings. Fig. 44. Smooth surface of the longitudinal canal; enlarged slit-like areolae near the canal. Fig 45. Central nodule, proximal raphe endings terminate in merged helictoglossae; hymenated areolae in striae. Fig. 46. Distal raphe ending terminating in helictoglossa. Scale bars = 10 μm (Fig. 3940); 5 μm (Figs 4143, 4546); 2 μm (Fig. 44)." figureDoi="http://doi.org/10.5281/zenodo.13216823" httpUri="https://zenodo.org/record/13216823/files/figure.png" pageId="3" pageNumber="264">Figs 3946</figureCitation>
). Externally, areolae in striae irregular along entire valve surface (from 1 to 4 or several more areolae in a stria), round open, and lay in depressions,
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10 μm (
<figureCitation id="134CEAD9FFDBFF8E3A48D7989BA8222C" captionStart="FIGURES 3946" captionStartId="6.[136,248,1873,1895]" captionTargetBox="[227,1331,210,1817]" captionTargetId="figure-27@6.[223,1363,190,1849]" captionTargetPageId="6" captionText="FIGURES 3946. Lacustriella provecta sp. nov. from type material, SEM external (Figs 39, 4144) and internal views (Figs 40, 4546). Figs 39, 40. Valve views. Fig. 41. Central area with proximal raphe endings, irregular areolae in striae. Figs 4243. Distal raphe endings. Fig. 44. Smooth surface of the longitudinal canal; enlarged slit-like areolae near the canal. Fig 45. Central nodule, proximal raphe endings terminate in merged helictoglossae; hymenated areolae in striae. Fig. 46. Distal raphe ending terminating in helictoglossa. Scale bars = 10 μm (Fig. 3940); 5 μm (Figs 4143, 4546); 2 μm (Fig. 44)." figureDoi="http://doi.org/10.5281/zenodo.13216823" httpUri="https://zenodo.org/record/13216823/files/figure.png" pageId="3" pageNumber="264">Figs 39, 41</figureCitation>
). Areolae in striae along the border of longitudinal canal slit-like, significantly elongated transapically (
<figureCitation id="134CEAD9FFDBFF8E3A18D7BC9E90222C" box="[1311,1439,1022,1048]" captionStart="FIGURES 3946" captionStartId="6.[136,248,1873,1895]" captionTargetBox="[227,1331,210,1817]" captionTargetId="figure-27@6.[223,1363,190,1849]" captionTargetPageId="6" captionText="FIGURES 3946. Lacustriella provecta sp. nov. from type material, SEM external (Figs 39, 4144) and internal views (Figs 40, 4546). Figs 39, 40. Valve views. Fig. 41. Central area with proximal raphe endings, irregular areolae in striae. Figs 4243. Distal raphe endings. Fig. 44. Smooth surface of the longitudinal canal; enlarged slit-like areolae near the canal. Fig 45. Central nodule, proximal raphe endings terminate in merged helictoglossae; hymenated areolae in striae. Fig. 46. Distal raphe ending terminating in helictoglossa. Scale bars = 10 μm (Fig. 3940); 5 μm (Figs 4143, 4546); 2 μm (Fig. 44)." figureDoi="http://doi.org/10.5281/zenodo.13216823" httpUri="https://zenodo.org/record/13216823/files/figure.png" pageId="3" pageNumber="264">Figs 41, 44</figureCitation>
). The surface of longitudinal canals smooth, unornamented (
<figureCitation id="134CEAD9FFDBFF8E3C27D060987A2208" box="[800,885,1058,1084]" captionStart="FIGURES 3946" captionStartId="6.[136,248,1873,1895]" captionTargetBox="[227,1331,210,1817]" captionTargetId="figure-27@6.[223,1363,190,1849]" captionTargetPageId="6" captionText="FIGURES 3946. Lacustriella provecta sp. nov. from type material, SEM external (Figs 39, 4144) and internal views (Figs 40, 4546). Figs 39, 40. Valve views. Fig. 41. Central area with proximal raphe endings, irregular areolae in striae. Figs 4243. Distal raphe endings. Fig. 44. Smooth surface of the longitudinal canal; enlarged slit-like areolae near the canal. Fig 45. Central nodule, proximal raphe endings terminate in merged helictoglossae; hymenated areolae in striae. Fig. 46. Distal raphe ending terminating in helictoglossa. Scale bars = 10 μm (Fig. 3940); 5 μm (Figs 4143, 4546); 2 μm (Fig. 44)." figureDoi="http://doi.org/10.5281/zenodo.13216823" httpUri="https://zenodo.org/record/13216823/files/figure.png" pageId="3" pageNumber="264">Fig. 44</figureCitation>
). Proximal raphe endings lay in slightly elongated drop-shaped depressions (
<figureCitation id="134CEAD9FFDBFF8E3EA8D004990B2254" box="[431,516,1094,1120]" captionStart="FIGURES 3946" captionStartId="6.[136,248,1873,1895]" captionTargetBox="[227,1331,210,1817]" captionTargetId="figure-27@6.[223,1363,190,1849]" captionTargetPageId="6" captionText="FIGURES 3946. Lacustriella provecta sp. nov. from type material, SEM external (Figs 39, 4144) and internal views (Figs 40, 4546). Figs 39, 40. Valve views. Fig. 41. Central area with proximal raphe endings, irregular areolae in striae. Figs 4243. Distal raphe endings. Fig. 44. Smooth surface of the longitudinal canal; enlarged slit-like areolae near the canal. Fig 45. Central nodule, proximal raphe endings terminate in merged helictoglossae; hymenated areolae in striae. Fig. 46. Distal raphe ending terminating in helictoglossa. Scale bars = 10 μm (Fig. 3940); 5 μm (Figs 4143, 4546); 2 μm (Fig. 44)." figureDoi="http://doi.org/10.5281/zenodo.13216823" httpUri="https://zenodo.org/record/13216823/files/figure.png" pageId="3" pageNumber="264">Fig. 41</figureCitation>
). Distal endings curved towards opposite sides (
<figureCitation id="134CEAD9FFDBFF8E3B2CD0049FA22254" box="[1067,1197,1094,1120]" captionStart="FIGURES 3946" captionStartId="6.[136,248,1873,1895]" captionTargetBox="[227,1331,210,1817]" captionTargetId="figure-27@6.[223,1363,190,1849]" captionTargetPageId="6" captionText="FIGURES 3946. Lacustriella provecta sp. nov. from type material, SEM external (Figs 39, 4144) and internal views (Figs 40, 4546). Figs 39, 40. Valve views. Fig. 41. Central area with proximal raphe endings, irregular areolae in striae. Figs 4243. Distal raphe endings. Fig. 44. Smooth surface of the longitudinal canal; enlarged slit-like areolae near the canal. Fig 45. Central nodule, proximal raphe endings terminate in merged helictoglossae; hymenated areolae in striae. Fig. 46. Distal raphe ending terminating in helictoglossa. Scale bars = 10 μm (Fig. 3940); 5 μm (Figs 4143, 4546); 2 μm (Fig. 44)." figureDoi="http://doi.org/10.5281/zenodo.13216823" httpUri="https://zenodo.org/record/13216823/files/figure.png" pageId="3" pageNumber="264">Fig. 42, 43</figureCitation>
). Internally, areolae in striae covered with hymenes. Raphe endings terminate on helictoglossae, central helictoglossae merged (
<figureCitation id="134CEAD9FFDBFF8E3A23D0289BA7229C" captionStart="FIGURES 3946" captionStartId="6.[136,248,1873,1895]" captionTargetBox="[227,1331,210,1817]" captionTargetId="figure-27@6.[223,1363,190,1849]" captionTargetPageId="6" captionText="FIGURES 3946. Lacustriella provecta sp. nov. from type material, SEM external (Figs 39, 4144) and internal views (Figs 40, 4546). Figs 39, 40. Valve views. Fig. 41. Central area with proximal raphe endings, irregular areolae in striae. Figs 4243. Distal raphe endings. Fig. 44. Smooth surface of the longitudinal canal; enlarged slit-like areolae near the canal. Fig 45. Central nodule, proximal raphe endings terminate in merged helictoglossae; hymenated areolae in striae. Fig. 46. Distal raphe ending terminating in helictoglossa. Scale bars = 10 μm (Fig. 3940); 5 μm (Figs 4143, 4546); 2 μm (Fig. 44)." figureDoi="http://doi.org/10.5281/zenodo.13216823" httpUri="https://zenodo.org/record/13216823/files/figure.png" pageId="3" pageNumber="264">Figs 40, 45, 46</figureCitation>
).
</paragraph>
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Type:
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<collectingMunicipality id="6BAC6C26FFDBFF8E3E7ED0F0990822F8" box="[377,519,1202,1228]" pageId="3" pageNumber="264">Lake Baikal</collectingMunicipality>
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isl.,
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, (53.576111 ºN, 107.8075 ºE),
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, sand sample, collected by
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on
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(
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,
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<collectingCountry id="F360B6CCFFDBFF8E3EF2D0B8994C2320" box="[501,579,1274,1300]" name="Russia" pageId="3" pageNumber="264">Russia</collectingCountry>
,
<collectorName id="2682938AFFDBFF8E3D48D0B898542320" box="[591,859,1274,1301]" pageId="3" pageNumber="264">M.G. Popov Herbarium</collectorName>
NSK.
<collectingMunicipality id="6BAC6C26FFDBFF8E3CADD0B89F5F2320" box="[938,1104,1274,1300]" pageId="3" pageNumber="264">Representative</collectingMunicipality>
type
<specimenCount id="9D713DD5FFDBFF8E3B96D0B89FF42320" box="[1169,1275,1274,1300]" pageId="3" pageNumber="264" type="generic">specimen</specimenCount>
is illustrated in
<figureCitation id="134CEAD9FFDBFF8E3F8FD15C9BD5230D" box="[136,218,1310,1337]" captionStart="FIGURES 2438" captionStartId="5.[136,248,1979,2001]" captionTargetBox="[215,1338,190,1922]" captionTargetId="figure-18@5.[215,1371,190,1955]" captionTargetPageId="5" captionText="FIGURES 2438. Lacustriella provecta sp. nov. LM micrographs showing morphological variations of valve views. Fig. 25. Holotype. Scale bar = 10 μm." figureDoi="http://doi.org/10.5281/zenodo.13216821" httpUri="https://zenodo.org/record/13216821/files/figure.png" pageId="3" pageNumber="264">Fig. 25</figureCitation>
.
<typeStatus id="54CC48FEFFDBFF8E3FE2D15D9A48230D" box="[229,327,1311,1337]" pageId="3" pageNumber="264" type="isotype">Isotypes</typeStatus>
: slide 0014-ВК,
<location id="8EA8A087FFDBFF8E3D05D15C99F3230C" LSID="urn:lsid:plazi:treatment:03DE474AFFDBFF8E3F8FD69C9FF92368:8EA8A087FFDBFF8E3D05D15C99F3230C" box="[514,764,1310,1336]" country="Russia" municipality="Representative" name="Limnological Institute" pageId="3" pageNumber="264" stateProvince="Novosibirsk">Limnological Institute</location>
SB RAS, Irkutsk, Russia, station 6, near
<location id="8EA8A087FFDBFF8E3BCDD15C9E31230C" LSID="urn:lsid:plazi:treatment:03DE474AFFDBFF8E3F8FD69C9FF92368:8EA8A087FFDBFF8E3BCDD15C9E31230C" box="[1226,1342,1310,1336]" country="Russia" municipality="Representative" name="Anga Bay" pageId="3" pageNumber="264" stateProvince="Novosibirsk">Anga Bay</location>
).
</materialsCitation>
</paragraph>
</subSubSection>
<subSubSection id="C36DA5D7FFDBFF8E3FBAD1009FF92368" box="[189,1270,1346,1373]" pageId="3" pageNumber="264" type="etymology">
<paragraph id="8BC8F65CFFDBFF8E3FBAD1009FF92368" blockId="3.[136,1452,806,1373]" box="[189,1270,1346,1373]" pageId="3" pageNumber="264">
Etymology: the specific epithet
<taxonomicName id="4C778DDFFFDBFF8E3D24D101998B2368" box="[547,644,1347,1372]" class="Bacillariophyceae" genus="Lacustriella" higherTaxonomySource="GBIF" kingdom="Chromista" pageId="3" pageNumber="264" phylum="Ochrophyta" rank="species" species="provecta">
<emphasis id="B9032A4EFFDBFF8E3D24D101998B2368" box="[547,644,1347,1372]" italics="true" pageId="3" pageNumber="264">provecta</emphasis>
</taxonomicName>
means elongated and refers to long areolae near canals.
</paragraph>
</subSubSection>
</treatment>
</document>