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<document id="EB4509E938A58B9EEFE1A28B1F3C3B57" ID-DOI="10.11646/phytotaxa.375.2.4" ID-ISSN="1179-3163" ID-Zenodo-Dep="13727951" IM.bibliography_approvedBy="felipe" IM.illustrations_approvedBy="felipe" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="GgImagineBatch" IM.taxonomicNames_approvedBy="felipe" IM.treatments_approvedBy="felipe" checkinTime="1725679499122" checkinUser="felipe" docAuthor="Lyakh, Anton M. &amp; Bedoshvili, Yekaterina D." docDate="2018" docId="8B6A87A905712B7EFF3220F6FD8FF8DE" docLanguage="en" docName="phytotaxa.375.2.4.pdf" docOrigin="Phytotaxa 375 (2)" docSource="http://dx.doi.org/10.11646/phytotaxa.375.2.4" docStyle="DocumentStyle:96748F8F1B6C902996E134952A3A36B9.13:Phytotaxa.2014-.journal_article" docStyleId="96748F8F1B6C902996E134952A3A36B9" docStyleName="Phytotaxa.2014-.journal_article" docStyleVersion="13" docTitle="Minidiscus vodyanitskiyi A. M. Lyakh &amp; Ye. D. Bedoshvili 2018, sp. nov." docType="treatment" docVersion="2" lastPageNumber="176" masterDocId="7753FFD105722B7BFFBA2069FFEEFFE8" masterDocTitle="Tiny diatoms Minidiscus vodyanitskiyi sp. nov. (Bacillariophyta) from the Sea of Azov and consideration of polygonal areolae pattern" masterLastPageNumber="181" masterPageNumber="171" pageNumber="174" updateTime="1725691675106" updateUser="ExternalLinkService" zenodo-license-figures="UNSPECIFIED" zenodo-license-treatments="UNSPECIFIED">
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<mods:titleInfo id="5D33326952440A5B02593A900A57EA07">
<mods:title id="1A2C2400BC2320525E267E47E5F92AAE">Tiny diatoms Minidiscus vodyanitskiyi sp. nov. (Bacillariophyta) from the Sea of Azov and consideration of polygonal areolae pattern</mods:title>
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<mods:name id="6ADEAE305B5DD8C968E5DF63655F9327" type="personal">
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<mods:namePart id="3183D8B3DD51CE7920ECD8F8E02629DB">Lyakh, Anton M.</mods:namePart>
<mods:affiliation id="5EAAE7676816ECCF8C8F3610F0D81ED5">Institute of Marine Biological Researches RAS, Nakhimov av., 2, Sevastopol, 299011, Russia</mods:affiliation>
<mods:nameIdentifier id="9FFF416B7B2B072C2B7391D122761877" type="email">antonlyakh@gmail.com</mods:nameIdentifier>
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<mods:namePart id="43259313C84B0C07D471596150CDCAB3">Bedoshvili, Yekaterina D.</mods:namePart>
<mods:affiliation id="72F1D0A2ED44DA4A9176D2F845C65663">Limnological Institute SB RAS, Ulan-Batorskaya, 3, Irkutsk, 664033, Russia</mods:affiliation>
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<mods:title id="7CDD0BD50466CAE6A3169D1535328AB2">Phytotaxa</mods:title>
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<mods:date id="78E73C9A5B37EA7F1973E602A52715C1">2018</mods:date>
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<mods:number id="C098AC30B172A9E784F65AEFF8D9707D">2018-11-12</mods:number>
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<mods:number id="3D3EE6C9B0318CA41D865673656F762E">375</mods:number>
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<mods:identifier id="B29C73506C849E53DA366C9B87A10880" type="DOI">10.11646/phytotaxa.375.2.4</mods:identifier>
<mods:identifier id="CC76CA5304CDA720A9FD72264EE06751" type="ISSN">1179-3163</mods:identifier>
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<treatment id="8B6A87A905712B7EFF3220F6FD8FF8DE" LSID="urn:lsid:plazi:treatment:8B6A87A905712B7EFF3220F6FD8FF8DE" httpUri="http://treatment.plazi.org/id/8B6A87A905712B7EFF3220F6FD8FF8DE" lastPageId="5" lastPageNumber="176" pageId="3" pageNumber="174">
<subSubSection id="4BD9653405712B78FF3220F6FEC5FF33" pageId="3" pageNumber="174" type="nomenclature">
<paragraph id="037C36BF05712B78FF3220F6FB73FF50" blockId="3.[136,1181,159,363]" box="[136,1181,159,184]" pageId="3" pageNumber="174">
<heading id="583481D305712B78FF3220F6FB73FF50" bold="true" box="[136,1181,159,184]" fontSize="11" level="1" pageId="3" pageNumber="174" reason="1">
<emphasis id="31B7EAAD05712B78FF3220F6FB73FF50" bold="true" box="[136,1181,159,184]" pageId="3" pageNumber="174">
<taxonomicName id="C4C34D3C05712B78FF3220F6FCDCFF50" authority="A. M. Lyakh &amp; Ye. D. Bedoshvili" authorityName="A. M. Lyakh &amp; Ye. D. Bedoshvili" authorityYear="2018" box="[136,818,159,184]" class="Bacillariophyceae" family="Thalassiosiraceae" genus="Minidiscus" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="3" pageNumber="174" phylum="Ochrophyta" rank="species" species="vodyanitskiyi" status="sp. nov.">
<emphasis id="31B7EAAD05712B78FF3220F6FE48FF50" bold="true" box="[136,422,159,184]" italics="true" pageId="3" pageNumber="174">Minidiscus vodyanitskiyi</emphasis>
A. M. Lyakh &amp; Ye. D. Bedoshvili
</taxonomicName>
,
<emphasis id="31B7EAAD05712B78FC8420F6FC7BFF50" bold="true" box="[830,917,159,184]" italics="true" pageId="3" pageNumber="174">
<taxonomicNameLabel id="2A8457D605712B78FC8420F6FC7BFF50" box="[830,917,159,184]" pageId="3" pageNumber="174" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
(
<figureCitation id="9BF82A3A05712B78FC1E20F6FBF6FF50" box="[932,1048,159,184]" captionStart-0="FIGURES 1–2" captionStart-1="FIGURES 3–4" captionStart-2="FIGURES 5–9" captionStart-3="FIGURES 10–13" captionStartId-0="1.[136,243,1981,2002]" captionStartId-1="3.[136,243,1281,1302]" captionStartId-2="4.[136,243,1313,1334]" captionStartId-3="5.[136,243,1032,1053]" captionTargetBox-0="[171,1412,1236,1942]" captionTargetBox-1="[152,1435,606,1227]" captionTargetBox-2="[191,1400,192,1285]" captionTargetBox-3="[167,1416,212,992]" captionTargetId-0="figure-370@1.[151,1437,1232,1942]" captionTargetId-1="figure-134@3.[151,1436,598,1256]" captionTargetId-2="figure-17@4.[164,1424,180,1298]" captionTargetId-3="figure-14@5.[151,1436,190,1007]" captionTargetPageId-0="1" captionTargetPageId-1="3" captionTargetPageId-2="4" captionTargetPageId-3="5" captionText-0="FIGURES 1–2. Types of polygonal areolae patterns. 1. Geometric models of polygonal areolae patterns redrawn from (Longuet-Higgins 2001). 2. Deformed hexagonal and heptagonal areolae patterns of M. vodyanitskiyi. SEM." captionText-1="FIGURES 3–4. Construction of cingulum of M. vodyanitskiyi. SEM." captionText-2="FIGURES 5–9. Construction of valve and areolae, and different views on fulto- and rimoportulae of M. vodyanitskiyi. 5–6. Outside and inside view of the valve of M. vodyanitskiyi; Fig. 5 shows holotype. 7. Outside and inside view on locular areolae and cribrum, which is perforated by cribral pores. 8. Different views on marginal fultoportulae—they all are surrounded by three satellite pores. 9. Different views on central fultoportula that is surrounded by two satellite pores, and on rimoportula that can be oriented radially, or slightly tangentially. SEM." captionText-3="FIGURES 10–13. Diversity of areolae constructions in M. vodyanitskiyi. SEM. 14. Dependence between diameters of valves and the presence or absence of filiform growth on areolae ribs in M. vodyanitskiyi; black vertical lines show median values. 15. Variability of valve dimensions: from small to largest; the largest valve has no filiform growth on areolae ribs, but in other characteristics it is identical to the small one. SEM. Scale bar is 10 μm." figureDoi-0="http://doi.org/10.5281/zenodo.13727953" figureDoi-1="http://doi.org/10.5281/zenodo.13727955" figureDoi-2="http://doi.org/10.5281/zenodo.13727957" figureDoi-3="http://doi.org/10.5281/zenodo.13727959" httpUri-0="https://zenodo.org/record/13727953/files/figure.png" httpUri-1="https://zenodo.org/record/13727955/files/figure.png" httpUri-2="https://zenodo.org/record/13727957/files/figure.png" httpUri-3="https://zenodo.org/record/13727959/files/figure.png" pageId="3" pageNumber="174">Figs 2–13</figureCitation>
, 15–17, 19)
</emphasis>
</heading>
</paragraph>
<paragraph id="037C36BF05712B78FF3220AFFEC5FF33" blockId="3.[136,1181,159,363]" box="[136,299,198,219]" pageId="3" pageNumber="174">
<emphasis id="31B7EAAD05712B78FF3220AFFEC5FF33" box="[136,299,198,219]" italics="true" pageId="3" pageNumber="174">Dimensions, μm.</emphasis>
</paragraph>
</subSubSection>
<subSubSection id="4BD9653405712B7FFF322083FD38F873" lastPageId="4" lastPageNumber="175" pageId="3" pageNumber="174" type="description">
<paragraph id="037C36BF05712B78FF322083FE17FF17" blockId="3.[136,1181,159,363]" box="[136,505,234,255]" pageId="3" pageNumber="174">Total frustule height: 3.25–3.58 (n=2).</paragraph>
<paragraph id="037C36BF05712B78FF322167FE17FECB" blockId="3.[136,1181,159,363]" box="[136,505,270,291]" pageId="3" pageNumber="174">Valve margin height: 0.63–0.65 (n=2).</paragraph>
<paragraph id="037C36BF05712B78FF32215BFD9BFEAF" blockId="3.[136,1181,159,363]" box="[136,629,306,327]" pageId="3" pageNumber="174">Frustule diameter: 2.85–(4.00 ± 0.95)–8.20 (n=38).</paragraph>
<paragraph id="037C36BF05712B78FF32213FFDB3FE83" blockId="3.[136,1181,159,363]" box="[136,605,342,363]" pageId="3" pageNumber="174">Valve diameter: 2.70–(3.75 ± 0.87)–7.80 (n=45).</paragraph>
<paragraph id="037C36BF05712B78FF3221FCFBF3FE3A" blockId="3.[136,1452,405,574]" pageId="3" pageNumber="174">
<emphasis id="31B7EAAD05712B78FF3221FCFF09FE46" box="[136,231,405,430]" italics="true" pageId="3" pageNumber="174">Frustule</emphasis>
has the shape of a round cylinder with oblique ends. Due to the presence of a hyaline conical flange before valves, the valve diameters are smaller than the diameters of frustules (
<figureCitation id="9BF82A3A05712B78FC1921D0FBFFFE3A" box="[931,1041,441,466]" captionStart="FIGURES 3–4" captionStartId="3.[136,243,1281,1302]" captionTargetBox="[152,1435,606,1227]" captionTargetId="figure-134@3.[151,1436,598,1256]" captionTargetPageId="3" captionText="FIGURES 3–4. Construction of cingulum of M. vodyanitskiyi. SEM." figureDoi="http://doi.org/10.5281/zenodo.13727955" httpUri="https://zenodo.org/record/13727955/files/figure.png" pageId="3" pageNumber="174">Figs. 3–4</figureCitation>
).
</paragraph>
<paragraph id="037C36BF05712B78FF0721B4FC64FDF2" blockId="3.[136,1452,405,574]" pageId="3" pageNumber="174">
<emphasis id="31B7EAAD05712B78FF0721B4FEC5FE1E" box="[189,299,477,502]" italics="true" pageId="3" pageNumber="174">Cingulum</emphasis>
comprises two copulae perforated by rows of equally distributed pores. One row of larger, elongated pores is located on the frustule edges close to each valve (
<figureCitation id="9BF82A3A05712B78FCAA2268FC90FDF2" box="[784,894,513,538]" captionStart="FIGURES 3–4" captionStartId="3.[136,243,1281,1302]" captionTargetBox="[152,1435,606,1227]" captionTargetId="figure-134@3.[151,1436,598,1256]" captionTargetPageId="3" captionText="FIGURES 3–4. Construction of cingulum of M. vodyanitskiyi. SEM." figureDoi="http://doi.org/10.5281/zenodo.13727955" httpUri="https://zenodo.org/record/13727955/files/figure.png" pageId="3" pageNumber="174">Figs. 3–4</figureCitation>
).
</paragraph>
<paragraph id="037C36BF05712B78FF07224CFB25FDD6" blockId="3.[136,1452,405,574]" box="[189,1227,549,574]" pageId="3" pageNumber="174">
<emphasis id="31B7EAAD05712B78FF07224CFEDEFDD6" box="[189,304,549,574]" italics="true" pageId="3" pageNumber="174">Valve face</emphasis>
is flat.
<emphasis id="31B7EAAD05712B78FE3E224CFDFDFDD6" box="[388,531,549,574]" italics="true" pageId="3" pageNumber="174">Valve mantle</emphasis>
is convex and narrow; it resembles a conical frustum (
<figureCitation id="9BF82A3A05712B78FBC3224CFB53FDD6" box="[1145,1213,549,574]" captionStart="FIGURES 3–4" captionStartId="3.[136,243,1281,1302]" captionTargetBox="[152,1435,606,1227]" captionTargetId="figure-134@3.[151,1436,598,1256]" captionTargetPageId="3" captionText="FIGURES 3–4. Construction of cingulum of M. vodyanitskiyi. SEM." figureDoi="http://doi.org/10.5281/zenodo.13727955" httpUri="https://zenodo.org/record/13727955/files/figure.png" pageId="3" pageNumber="174">Fig. 3</figureCitation>
).
</paragraph>
<caption id="57BC663705712B78FF322568FCCCFAFE" ID-DOI="http://doi.org/10.5281/zenodo.13727955" ID-Zenodo-Dep="13727955" box="[136,802,1281,1302]" httpUri="https://zenodo.org/record/13727955/files/figure.png" pageId="3" pageNumber="174" startId="3.[136,243,1281,1302]" targetBox="[152,1435,606,1227]" targetPageId="3" targetType="figure">
<paragraph id="037C36BF05712B78FF322568FCCCFAFE" blockId="3.[136,802,1281,1302]" box="[136,802,1281,1302]" pageId="3" pageNumber="174">
<emphasis id="31B7EAAD05712B78FF322568FECCFAFE" bold="true" box="[136,290,1281,1302]" pageId="3" pageNumber="174">FIGURES 3–4.</emphasis>
Construction of cingulum of
<emphasis id="31B7EAAD05712B78FD852568FD0BFAFE" box="[575,741,1281,1302]" italics="true" pageId="3" pageNumber="174">
<taxonomicName id="C4C34D3C05712B78FD852568FD0FFAFE" authorityName="A. M. Lyakh &amp; Ye. D. Bedoshvili" authorityYear="2018" box="[575,737,1281,1302]" class="Bacillariophyceae" family="Thalassiosiraceae" genus="Minidiscus" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="3" pageNumber="174" phylum="Ochrophyta" rank="species" species="vodyanitskiyi">M. vodyanitskiyi</taxonomicName>
.
</emphasis>
SEM.
</paragraph>
</caption>
<paragraph id="037C36BF05712B78FF072529FE99F9D9" blockId="3.[136,1452,1344,2053]" pageId="3" pageNumber="174">
<emphasis id="31B7EAAD05712B78FF072529FE81FAB1" box="[189,367,1344,1369]" italics="true" pageId="3" pageNumber="174">Areolae pattern</emphasis>
is deformed polygonal.
<emphasis id="31B7EAAD05712B78FD3D2529FC23FAB1" box="[647,973,1344,1369]" italics="true" pageId="3" pageNumber="174">Areolae pattern polygonality</emphasis>
is 6–7. The pattern consists of concentric hexa- or heptagons with deformed sides (
<figureCitation id="9BF82A3A05712B78FDDD250DFD41FA95" box="[615,687,1380,1405]" captionStart="FIGURES 1–2" captionStartId="1.[136,243,1981,2002]" captionTargetBox="[171,1412,1236,1942]" captionTargetId="figure-370@1.[151,1437,1232,1942]" captionTargetPageId="1" captionText="FIGURES 1–2. Types of polygonal areolae patterns. 1. Geometric models of polygonal areolae patterns redrawn from (Longuet-Higgins 2001). 2. Deformed hexagonal and heptagonal areolae patterns of M. vodyanitskiyi. SEM." figureDoi="http://doi.org/10.5281/zenodo.13727953" httpUri="https://zenodo.org/record/13727953/files/figure.png" pageId="3" pageNumber="174">Fig. 2</figureCitation>
). It does not contain radial rows except for the 6–7 primary ones, and there are 6–7 areolae surrounding the valve centre.
<emphasis id="31B7EAAD05712B78FD4625E1FC44FA49" box="[764,938,1416,1441]" italics="true" pageId="3" pageNumber="174">Areolae density</emphasis>
is 2.1–(3.2±0.6)–4.1 areolae in 1 μm (n=29).
<emphasis id="31B7EAAD05712B78FF3225C5FEC9FA2D" box="[136,295,1452,1477]" italics="true" pageId="3" pageNumber="174">Areolae shape</emphasis>
(
<figureCitation id="9BF82A3A05712B78FE8F25C5FE70FA2D" box="[309,414,1452,1477]" captionStart="FIGURES 5–9" captionStartId="4.[136,243,1313,1334]" captionTargetBox="[191,1400,192,1285]" captionTargetId="figure-17@4.[164,1424,180,1298]" captionTargetPageId="4" captionText="FIGURES 5–9. Construction of valve and areolae, and different views on fulto- and rimoportulae of M. vodyanitskiyi. 5–6. Outside and inside view of the valve of M. vodyanitskiyi; Fig. 5 shows holotype. 7. Outside and inside view on locular areolae and cribrum, which is perforated by cribral pores. 8. Different views on marginal fultoportulae—they all are surrounded by three satellite pores. 9. Different views on central fultoportula that is surrounded by two satellite pores, and on rimoportula that can be oriented radially, or slightly tangentially. SEM." figureDoi="http://doi.org/10.5281/zenodo.13727957" httpUri="https://zenodo.org/record/13727957/files/figure.png" pageId="3" pageNumber="174">Figs. 5, 7</figureCitation>
) varies from the larger, rounded-elliptic openings in the valve centre to the smaller, elongated polygonal ones near the valve margin. On the valve margin, the areolae are elongated and do not have outer tangential ribs (
<figureCitation id="9BF82A3A05712B78FF7E259DFEE5F9E5" box="[196,267,1524,1549]" captionStart="FIGURES 5–9" captionStartId="4.[136,243,1313,1334]" captionTargetBox="[191,1400,192,1285]" captionTargetId="figure-17@4.[164,1424,180,1298]" captionTargetPageId="4" captionText="FIGURES 5–9. Construction of valve and areolae, and different views on fulto- and rimoportulae of M. vodyanitskiyi. 5–6. Outside and inside view of the valve of M. vodyanitskiyi; Fig. 5 shows holotype. 7. Outside and inside view on locular areolae and cribrum, which is perforated by cribral pores. 8. Different views on marginal fultoportulae—they all are surrounded by three satellite pores. 9. Different views on central fultoportula that is surrounded by two satellite pores, and on rimoportula that can be oriented radially, or slightly tangentially. SEM." figureDoi="http://doi.org/10.5281/zenodo.13727957" httpUri="https://zenodo.org/record/13727957/files/figure.png" pageId="3" pageNumber="174">Fig. 5</figureCitation>
).
<emphasis id="31B7EAAD05712B78FE99259DFE31F9E5" box="[291,479,1524,1549]" italics="true" pageId="3" pageNumber="174">Areolae loculate</emphasis>
with external foramina and internal cribra.
<emphasis id="31B7EAAD05712B78FC60259DFBC8F9E5" box="[986,1062,1524,1549]" italics="true" pageId="3" pageNumber="174">Cribra</emphasis>
are perforated by equally located cribral pores (
<figureCitation id="9BF82A3A05712B78FE9E2671FE86F9D9" box="[292,360,1560,1585]" captionStart="FIGURES 5–9" captionStartId="4.[136,243,1313,1334]" captionTargetBox="[191,1400,192,1285]" captionTargetId="figure-17@4.[164,1424,180,1298]" captionTargetPageId="4" captionText="FIGURES 5–9. Construction of valve and areolae, and different views on fulto- and rimoportulae of M. vodyanitskiyi. 5–6. Outside and inside view of the valve of M. vodyanitskiyi; Fig. 5 shows holotype. 7. Outside and inside view on locular areolae and cribrum, which is perforated by cribral pores. 8. Different views on marginal fultoportulae—they all are surrounded by three satellite pores. 9. Different views on central fultoportula that is surrounded by two satellite pores, and on rimoportula that can be oriented radially, or slightly tangentially. SEM." figureDoi="http://doi.org/10.5281/zenodo.13727957" httpUri="https://zenodo.org/record/13727957/files/figure.png" pageId="3" pageNumber="174">Fig. 7</figureCitation>
).
</paragraph>
<paragraph id="037C36BF05712B78FF072655FE10F8B9" blockId="3.[136,1452,1344,2053]" pageId="3" pageNumber="174">
<emphasis id="31B7EAAD05712B78FF072655FE8FF9BD" box="[189,353,1596,1621]" italics="true" pageId="3" pageNumber="174">Fultoportulae.</emphasis>
The valve has one central fultoportula (CFP) and some marginal fultoportulae (MFP). They have no external or internal tubes. Internally and externally they appear similar to round pores surrounded by a low siliceous rim (
<figureCitation id="9BF82A3A05712B78FF0426EDFEC7F975" box="[190,297,1668,1693]" captionStart="FIGURES 5–9" captionStartId="4.[136,243,1313,1334]" captionTargetBox="[191,1400,192,1285]" captionTargetId="figure-17@4.[164,1424,180,1298]" captionTargetPageId="4" captionText="FIGURES 5–9. Construction of valve and areolae, and different views on fulto- and rimoportulae of M. vodyanitskiyi. 5–6. Outside and inside view of the valve of M. vodyanitskiyi; Fig. 5 shows holotype. 7. Outside and inside view on locular areolae and cribrum, which is perforated by cribral pores. 8. Different views on marginal fultoportulae—they all are surrounded by three satellite pores. 9. Different views on central fultoportula that is surrounded by two satellite pores, and on rimoportula that can be oriented radially, or slightly tangentially. SEM." figureDoi="http://doi.org/10.5281/zenodo.13727957" httpUri="https://zenodo.org/record/13727957/files/figure.png" pageId="3" pageNumber="174">Figs. 5, 6</figureCitation>
).
<emphasis id="31B7EAAD05712B78FE8426EDFE9DF975" box="[318,371,1668,1693]" italics="true" pageId="3" pageNumber="174">CFP</emphasis>
is located near the geometric centre of the valve, 6–7 areolae surround it (
<figureCitation id="9BF82A3A05712B78FB1426EDFB1DF975" box="[1198,1267,1668,1693]" captionStart="FIGURES 1–2" captionStartId="1.[136,243,1981,2002]" captionTargetBox="[171,1412,1236,1942]" captionTargetId="figure-370@1.[151,1437,1232,1942]" captionTargetPageId="1" captionText="FIGURES 1–2. Types of polygonal areolae patterns. 1. Geometric models of polygonal areolae patterns redrawn from (Longuet-Higgins 2001). 2. Deformed hexagonal and heptagonal areolae patterns of M. vodyanitskiyi. SEM." figureDoi="http://doi.org/10.5281/zenodo.13727953" httpUri="https://zenodo.org/record/13727953/files/figure.png" pageId="3" pageNumber="174">Fig. 2</figureCitation>
). Internally CFP is surrounded by two satellite pores (SLP) located opposite each other (
<figureCitation id="9BF82A3A05712B78FC2526C1FC0DF929" box="[927,995,1704,1729]" captionStart="FIGURES 5–9" captionStartId="4.[136,243,1313,1334]" captionTargetBox="[191,1400,192,1285]" captionTargetId="figure-17@4.[164,1424,180,1298]" captionTargetPageId="4" captionText="FIGURES 5–9. Construction of valve and areolae, and different views on fulto- and rimoportulae of M. vodyanitskiyi. 5–6. Outside and inside view of the valve of M. vodyanitskiyi; Fig. 5 shows holotype. 7. Outside and inside view on locular areolae and cribrum, which is perforated by cribral pores. 8. Different views on marginal fultoportulae—they all are surrounded by three satellite pores. 9. Different views on central fultoportula that is surrounded by two satellite pores, and on rimoportula that can be oriented radially, or slightly tangentially. SEM." figureDoi="http://doi.org/10.5281/zenodo.13727957" httpUri="https://zenodo.org/record/13727957/files/figure.png" pageId="3" pageNumber="174">Fig. 9</figureCitation>
). Externally, CFP opens by a round pore. MFPs are equally spaced on a border between the valve surface and valve mantle. Internally, each MFP is surrounded by three SLPs. The angle between SLPs is 90°, and the middle pore is directed towards the valve edge (
<figureCitation id="9BF82A3A05712B78FAEF2699FA73F8E1" box="[1365,1437,1776,1801]" captionStart="FIGURES 5–9" captionStartId="4.[136,243,1313,1334]" captionTargetBox="[191,1400,192,1285]" captionTargetId="figure-17@4.[164,1424,180,1298]" captionTargetPageId="4" captionText="FIGURES 5–9. Construction of valve and areolae, and different views on fulto- and rimoportulae of M. vodyanitskiyi. 5–6. Outside and inside view of the valve of M. vodyanitskiyi; Fig. 5 shows holotype. 7. Outside and inside view on locular areolae and cribrum, which is perforated by cribral pores. 8. Different views on marginal fultoportulae—they all are surrounded by three satellite pores. 9. Different views on central fultoportula that is surrounded by two satellite pores, and on rimoportula that can be oriented radially, or slightly tangentially. SEM." figureDoi="http://doi.org/10.5281/zenodo.13727957" httpUri="https://zenodo.org/record/13727957/files/figure.png" pageId="3" pageNumber="174">Fig. 8</figureCitation>
). Externally, MFPs are placed on small hyaline elevations. The number of MFPs was varied from 4 to 6, except for one exemplar with ten MFPs (
<figureCitation id="9BF82A3A05712B78FE112751FE1EF8B9" box="[427,496,1848,1873]" captionStart="FIGURES 5–9" captionStartId="4.[136,243,1313,1334]" captionTargetBox="[191,1400,192,1285]" captionTargetId="figure-17@4.[164,1424,180,1298]" captionTargetPageId="4" captionText="FIGURES 5–9. Construction of valve and areolae, and different views on fulto- and rimoportulae of M. vodyanitskiyi. 5–6. Outside and inside view of the valve of M. vodyanitskiyi; Fig. 5 shows holotype. 7. Outside and inside view on locular areolae and cribrum, which is perforated by cribral pores. 8. Different views on marginal fultoportulae—they all are surrounded by three satellite pores. 9. Different views on central fultoportula that is surrounded by two satellite pores, and on rimoportula that can be oriented radially, or slightly tangentially. SEM." figureDoi="http://doi.org/10.5281/zenodo.13727957" httpUri="https://zenodo.org/record/13727957/files/figure.png" pageId="3" pageNumber="174">Fig. 5</figureCitation>
).
</paragraph>
<paragraph id="037C36BF05712B78FF072735FB82F855" blockId="3.[136,1452,1344,2053]" pageId="3" pageNumber="174">
<emphasis id="31B7EAAD05712B78FF072735FEBDF89D" box="[189,339,1884,1909]" italics="true" pageId="3" pageNumber="174">Rimoportula.</emphasis>
The valve has one rimoportula (RMP). It is located at a distance of one areolae from the valve centre (
<figureCitation id="9BF82A3A05712B78FF6727E9FECCF871" box="[221,290,1920,1945]" captionStart="FIGURES 5–9" captionStartId="4.[136,243,1313,1334]" captionTargetBox="[191,1400,192,1285]" captionTargetId="figure-17@4.[164,1424,180,1298]" captionTargetPageId="4" captionText="FIGURES 5–9. Construction of valve and areolae, and different views on fulto- and rimoportulae of M. vodyanitskiyi. 5–6. Outside and inside view of the valve of M. vodyanitskiyi; Fig. 5 shows holotype. 7. Outside and inside view on locular areolae and cribrum, which is perforated by cribral pores. 8. Different views on marginal fultoportulae—they all are surrounded by three satellite pores. 9. Different views on central fultoportula that is surrounded by two satellite pores, and on rimoportula that can be oriented radially, or slightly tangentially. SEM." figureDoi="http://doi.org/10.5281/zenodo.13727957" httpUri="https://zenodo.org/record/13727957/files/figure.png" pageId="3" pageNumber="174">Fig. 5</figureCitation>
). Externally it opens by a round pore or elongated polygonal pore with ragged edges. Internally, it is a slit surrounded by a plan elliptic rim oriented radially or slightly tangentially (
<figureCitation id="9BF82A3A05712B78FC4927CDFBB0F855" box="[1011,1118,1956,1981]" captionStart="FIGURES 5–9" captionStartId="4.[136,243,1313,1334]" captionTargetBox="[191,1400,192,1285]" captionTargetId="figure-17@4.[164,1424,180,1298]" captionTargetPageId="4" captionText="FIGURES 5–9. Construction of valve and areolae, and different views on fulto- and rimoportulae of M. vodyanitskiyi. 5–6. Outside and inside view of the valve of M. vodyanitskiyi; Fig. 5 shows holotype. 7. Outside and inside view on locular areolae and cribrum, which is perforated by cribral pores. 8. Different views on marginal fultoportulae—they all are surrounded by three satellite pores. 9. Different views on central fultoportula that is surrounded by two satellite pores, and on rimoportula that can be oriented radially, or slightly tangentially. SEM." figureDoi="http://doi.org/10.5281/zenodo.13727957" httpUri="https://zenodo.org/record/13727957/files/figure.png" pageId="3" pageNumber="174">Figs. 6, 9</figureCitation>
).
</paragraph>
<paragraph id="037C36BF05712B78FF0727A1FC73F7ED" blockId="3.[136,1452,1344,2053]" pageId="3" pageNumber="174">
<emphasis id="31B7EAAD05712B78FF0727A1FE58F809" box="[189,438,1992,2017]" italics="true" pageId="3" pageNumber="174">Siliceous granulation.</emphasis>
The areolae ribs of some of the found specimens consisted of siliceous granulations (
<figureCitation id="9BF82A3A05712B78FAC427A1FF49F7ED" captionStart="FIGURES 10–13" captionStartId="5.[136,243,1032,1053]" captionTargetBox="[167,1416,212,992]" captionTargetId="figure-14@5.[151,1436,190,1007]" captionTargetPageId="5" captionText="FIGURES 10–13. Diversity of areolae constructions in M. vodyanitskiyi. SEM. 14. Dependence between diameters of valves and the presence or absence of filiform growth on areolae ribs in M. vodyanitskiyi; black vertical lines show median values. 15. Variability of valve dimensions: from small to largest; the largest valve has no filiform growth on areolae ribs, but in other characteristics it is identical to the small one. SEM. Scale bar is 10 μm." figureDoi="http://doi.org/10.5281/zenodo.13727959" httpUri="https://zenodo.org/record/13727959/files/figure.png" pageId="3" pageNumber="174">Fig. 10</figureCitation>
). We considered that they were formed due to deficiency of silicon.
</paragraph>
<caption id="57BC663705762B7FFF322548FED2FA2E" ID-DOI="http://doi.org/10.5281/zenodo.13727957" ID-Zenodo-Dep="13727957" httpUri="https://zenodo.org/record/13727957/files/figure.png" pageId="4" pageNumber="175" startId="4.[136,243,1313,1334]" targetBox="[191,1400,192,1285]" targetPageId="4" targetType="figure">
<paragraph id="037C36BF05762B7FFF322548FED2FA2E" blockId="4.[136,1452,1313,1478]" pageId="4" pageNumber="175">
<emphasis id="31B7EAAD05762B7FFF322548FECAFADE" bold="true" box="[136,292,1313,1334]" pageId="4" pageNumber="175">FIGURES 5–9.</emphasis>
Construction of valve and areolae, and different views on fulto- and rimoportulae of
<emphasis id="31B7EAAD05762B7FFBE62548FAECFADE" box="[1116,1282,1313,1334]" italics="true" pageId="4" pageNumber="175">
<taxonomicName id="C4C34D3C05762B7FFBE62548FB10FADE" authorityName="A. M. Lyakh &amp; Ye. D. Bedoshvili" authorityYear="2018" box="[1116,1278,1313,1334]" class="Bacillariophyceae" family="Thalassiosiraceae" genus="Minidiscus" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="4" pageNumber="175" phylum="Ochrophyta" rank="species" species="vodyanitskiyi">M. vodyanitskiyi</taxonomicName>
.
</emphasis>
<emphasis id="31B7EAAD05762B7FFABD2548FADCFADE" bold="true" box="[1287,1330,1313,1334]" pageId="4" pageNumber="175">5–6.</emphasis>
Outside and inside view of the valve of
<taxonomicName id="C4C34D3C05762B7FFE2C252CFDD9FAB2" authorityName="A. M. Lyakh &amp; Ye. D. Bedoshvili" authorityYear="2018" box="[406,567,1349,1370]" class="Bacillariophyceae" family="Thalassiosiraceae" genus="Minidiscus" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="4" pageNumber="175" phylum="Ochrophyta" rank="species" species="vodyanitskiyi">
<emphasis id="31B7EAAD05762B7FFE2C252CFDD9FAB2" box="[406,567,1349,1370]" italics="true" pageId="4" pageNumber="175">M. vodyanitskiyi</emphasis>
</taxonomicName>
; Fig. 5 shows holotype.
<emphasis id="31B7EAAD05762B7FFC90252CFCD2FAB2" bold="true" box="[810,828,1349,1370]" pageId="4" pageNumber="175">7.</emphasis>
Outside and inside view on locular areolae and cribrum, which is perforated by cribral pores.
<emphasis id="31B7EAAD05762B7FFE162500FE50FA96" bold="true" box="[428,446,1385,1406]" pageId="4" pageNumber="175">8.</emphasis>
Different views on marginal fultoportulae—they all are surrounded by three satellite pores.
<emphasis id="31B7EAAD05762B7FFA812500FAA3FA96" bold="true" box="[1339,1357,1385,1406]" pageId="4" pageNumber="175">9.</emphasis>
Different views on central fultoportula that is surrounded by two satellite pores, and on rimoportula that can be oriented radially, or slightly tangentially. SEM.
</paragraph>
</caption>
<paragraph id="037C36BF05762B7FFF07259FFAFEF92B" blockId="4.[136,1452,1526,2055]" pageId="4" pageNumber="175">
<emphasis id="31B7EAAD05762B7FFF07259FFE0DF9E7" box="[189,483,1526,1551]" italics="true" pageId="4" pageNumber="175">Filiform siliceous growth.</emphasis>
There were two contrasting groups of diatoms and intermediate forms between them (
<figureCitation id="9BF82A3A05762B7FFF2A2673FEF5F9DB" box="[144,283,1562,1587]" captionStart="FIGURES 10–13" captionStartId="5.[136,243,1032,1053]" captionTargetBox="[167,1416,212,992]" captionTargetId="figure-14@5.[151,1436,190,1007]" captionTargetPageId="5" captionText="FIGURES 10–13. Diversity of areolae constructions in M. vodyanitskiyi. SEM. 14. Dependence between diameters of valves and the presence or absence of filiform growth on areolae ribs in M. vodyanitskiyi; black vertical lines show median values. 15. Variability of valve dimensions: from small to largest; the largest valve has no filiform growth on areolae ribs, but in other characteristics it is identical to the small one. SEM. Scale bar is 10 μm." figureDoi="http://doi.org/10.5281/zenodo.13727959" httpUri="https://zenodo.org/record/13727959/files/figure.png" pageId="4" pageNumber="175">Figs. 10–13</figureCitation>
). Both groups have identical taxonomic characteristics except for the presence of tiny filiform siliceous growth on the areolae ribs. The first group has smooth ribs between the areolae (
<figureCitation id="9BF82A3A05762B7FFBB22657FB63F9BF" box="[1032,1165,1598,1623]" captionStart="FIGURES 10–13" captionStartId="5.[136,243,1032,1053]" captionTargetBox="[167,1416,212,992]" captionTargetId="figure-14@5.[151,1436,190,1007]" captionTargetPageId="5" captionText="FIGURES 10–13. Diversity of areolae constructions in M. vodyanitskiyi. SEM. 14. Dependence between diameters of valves and the presence or absence of filiform growth on areolae ribs in M. vodyanitskiyi; black vertical lines show median values. 15. Variability of valve dimensions: from small to largest; the largest valve has no filiform growth on areolae ribs, but in other characteristics it is identical to the small one. SEM. Scale bar is 10 μm." figureDoi="http://doi.org/10.5281/zenodo.13727959" httpUri="https://zenodo.org/record/13727959/files/figure.png" pageId="4" pageNumber="175">Figs. 10, 11</figureCitation>
), and the second contains filiform growth on the areolae ribs (
<figureCitation id="9BF82A3A05762B7FFDB5260BFD7AF993" box="[527,660,1634,1659]" captionStart="FIGURES 10–13" captionStartId="5.[136,243,1032,1053]" captionTargetBox="[167,1416,212,992]" captionTargetId="figure-14@5.[151,1436,190,1007]" captionTargetPageId="5" captionText="FIGURES 10–13. Diversity of areolae constructions in M. vodyanitskiyi. SEM. 14. Dependence between diameters of valves and the presence or absence of filiform growth on areolae ribs in M. vodyanitskiyi; black vertical lines show median values. 15. Variability of valve dimensions: from small to largest; the largest valve has no filiform growth on areolae ribs, but in other characteristics it is identical to the small one. SEM. Scale bar is 10 μm." figureDoi="http://doi.org/10.5281/zenodo.13727959" httpUri="https://zenodo.org/record/13727959/files/figure.png" pageId="4" pageNumber="175">Figs. 12, 13</figureCitation>
). The density and length of the filiform growth was varied. We observed specimens without filiform growth, with rare small filiform growth (
<figureCitation id="9BF82A3A05762B7FFC3B26EFFC3DF977" box="[897,979,1670,1695]" captionStart="FIGURES 10–13" captionStartId="5.[136,243,1032,1053]" captionTargetBox="[167,1416,212,992]" captionTargetId="figure-14@5.[151,1436,190,1007]" captionTargetPageId="5" captionText="FIGURES 10–13. Diversity of areolae constructions in M. vodyanitskiyi. SEM. 14. Dependence between diameters of valves and the presence or absence of filiform growth on areolae ribs in M. vodyanitskiyi; black vertical lines show median values. 15. Variability of valve dimensions: from small to largest; the largest valve has no filiform growth on areolae ribs, but in other characteristics it is identical to the small one. SEM. Scale bar is 10 μm." figureDoi="http://doi.org/10.5281/zenodo.13727959" httpUri="https://zenodo.org/record/13727959/files/figure.png" pageId="4" pageNumber="175">Fig. 12</figureCitation>
), with dense intermediate filiform growth, and with dense long filiform growth that was also formed on a cribra inside areolae chambers (
<figureCitation id="9BF82A3A05762B7FFB1526C3FAECF92B" box="[1199,1282,1706,1731]" captionStart="FIGURES 10–13" captionStartId="5.[136,243,1032,1053]" captionTargetBox="[167,1416,212,992]" captionTargetId="figure-14@5.[151,1436,190,1007]" captionTargetPageId="5" captionText="FIGURES 10–13. Diversity of areolae constructions in M. vodyanitskiyi. SEM. 14. Dependence between diameters of valves and the presence or absence of filiform growth on areolae ribs in M. vodyanitskiyi; black vertical lines show median values. 15. Variability of valve dimensions: from small to largest; the largest valve has no filiform growth on areolae ribs, but in other characteristics it is identical to the small one. SEM. Scale bar is 10 μm." figureDoi="http://doi.org/10.5281/zenodo.13727959" httpUri="https://zenodo.org/record/13727959/files/figure.png" pageId="4" pageNumber="175">Fig. 13</figureCitation>
).
</paragraph>
<paragraph id="037C36BF05762B7FFF0726A7FB08F8C7" blockId="4.[136,1452,1526,2055]" pageId="4" pageNumber="175">There were no significant differences in the diameters of valves with and without filiform growth on the areolae ribs (Fig. 14), except for one exemplar. Its valve diameter was 7.8 μm, and it did not contain filiform growth on the areolae ribs (Fig. 15, right). Morphologically, it was very similar to other diatoms in the population.</paragraph>
<paragraph id="037C36BF05762B7FFF072753FD38F873" blockId="4.[136,1452,1526,2055]" pageId="4" pageNumber="175">
<emphasis id="31B7EAAD05762B7FFF072753FE4CF8BB" box="[189,418,1850,1875]" italics="true" pageId="4" pageNumber="175">Teratological forms.</emphasis>
We found teratological valves where only one or two SLPs surround some MFPs, while the other MFP had three SLPs (
<figureCitation id="9BF82A3A05762B7FFE062737FDADF89F" box="[444,579,1886,1911]" captionStart="FIGURES 16–17" captionStartId="6.[136,243,1951,1972]" captionTargetBox="[151,1436,1098,1891]" captionTargetId="figure-420@6.[151,1436,1087,1920]" captionTargetPageId="6" captionText="FIGURES 16–17. Teratological valves of M. vodyanitskiyi. 16. Two marginal fultoportulae are surrounded by 1 or 2 satellite pores instead of 3. 17. Rimoportula slit is orthogonal to a radial direction, and the number of satellite pores around two marginal fultoportulae is less than 3. SEM." figureDoi="http://doi.org/10.5281/zenodo.13727961" httpUri="https://zenodo.org/record/13727961/files/figure.png" pageId="4" pageNumber="175">Figs. 16, 17</figureCitation>
). Another teratology is the orthogonal direction of RMP slit (
<figureCitation id="9BF82A3A05762B7FFB532737FAD5F89F" box="[1257,1339,1886,1911]" captionStart="FIGURES 16–17" captionStartId="6.[136,243,1951,1972]" captionTargetBox="[151,1436,1098,1891]" captionTargetId="figure-420@6.[151,1436,1087,1920]" captionTargetPageId="6" captionText="FIGURES 16–17. Teratological valves of M. vodyanitskiyi. 16. Two marginal fultoportulae are surrounded by 1 or 2 satellite pores instead of 3. 17. Rimoportula slit is orthogonal to a radial direction, and the number of satellite pores around two marginal fultoportulae is less than 3. SEM." figureDoi="http://doi.org/10.5281/zenodo.13727961" httpUri="https://zenodo.org/record/13727961/files/figure.png" pageId="4" pageNumber="175">Fig. 17</figureCitation>
), since on normal valves such a slit is directed radially (
<figureCitation id="9BF82A3A05762B7FFD3E27EBFD26F873" box="[644,712,1922,1947]" captionStart="FIGURES 5–9" captionStartId="4.[136,243,1313,1334]" captionTargetBox="[191,1400,192,1285]" captionTargetId="figure-17@4.[164,1424,180,1298]" captionTargetPageId="4" captionText="FIGURES 5–9. Construction of valve and areolae, and different views on fulto- and rimoportulae of M. vodyanitskiyi. 5–6. Outside and inside view of the valve of M. vodyanitskiyi; Fig. 5 shows holotype. 7. Outside and inside view on locular areolae and cribrum, which is perforated by cribral pores. 8. Different views on marginal fultoportulae—they all are surrounded by three satellite pores. 9. Different views on central fultoportula that is surrounded by two satellite pores, and on rimoportula that can be oriented radially, or slightly tangentially. SEM." figureDoi="http://doi.org/10.5281/zenodo.13727957" httpUri="https://zenodo.org/record/13727957/files/figure.png" pageId="4" pageNumber="175">Fig. 9</figureCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="4BD9653405762B7EFF0727CFFEA1FB1E" lastPageId="5" lastPageNumber="176" pageId="4" pageNumber="175" type="materials_examined">
<paragraph id="037C36BF05762B7FFF0727CFFE16F7EF" blockId="4.[136,1452,1526,2055]" pageId="4" pageNumber="175">
<emphasis id="31B7EAAD05762B7FFF0727CFFEEFF857" bold="true" box="[189,257,1958,1983]" pageId="4" pageNumber="175">Type:</emphasis>
—
<materialsCitation id="B3AB3CE205762B7FFEA527CFFE1BF7EF" collectionCode="DM" collectorName="A. Lyakh &amp; November &amp; Slide" country="Russia" county="Lyakh in June" latitude="45.837166" location="Open" longLatPrecision="11" longitude="36.001335" municipality="Sea of Azov" pageId="4" pageNumber="175" specimenCount="2" typeStatus="holotype">
<collectingCountry id="7BD4762F05762B7FFEA527CFFE6BF857" box="[287,389,1958,1983]" name="Russia" pageId="4" pageNumber="175">RUSSIA</collectingCountry>
.
<location id="061C606405762B7FFE2B27CFFE20F857" LSID="urn:lsid:plazi:treatment:8B6A87A905712B7EFF3220F6FD8FF8DE:061C606405762B7FFE2B27CFFE20F857" box="[401,462,1958,1983]" country="Russia" county="Lyakh in June" latitude="45.837166" longLatPrecision="11" longitude="36.001335" municipality="Sea of Azov" name="Open" pageId="4" pageNumber="175">Open</location>
waters of the
<collectingMunicipality id="E318ACC505762B7FFDCE27CFFCEFF857" box="[628,769,1958,1983]" pageId="4" pageNumber="175">Sea of Azov</collectingMunicipality>
(
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;
<geoCoordinate id="66F7507805762B7FFC1427CFFBD9F857" box="[942,1079,1958,1983]" degrees="36" direction="east" minutes="00.08" orientation="longitude" pageId="4" pageNumber="175" precision="9" value="36.001335">36°00.08′ E</geoCoordinate>
), water column. Collected by
<collectorName id="AE36536905762B7FFA2A27CFFF20F80B" pageId="4" pageNumber="175">
A.
<collectingCounty id="EA1D4E3305762B7FFF3227A3FF20F80B" box="[136,206,1994,2019]" pageId="4" pageNumber="175">Lyakh</collectingCounty>
</collectorName>
in June, 2016, and
<collectorName id="AE36536905762B7FFE0D27A3FDC1F80B" box="[439,559,1994,2019]" pageId="4" pageNumber="175">November</collectorName>
, 2017.
<collectorName id="AE36536905762B7FFD3F27A3FD51F80B" box="[645,703,1994,2019]" pageId="4" pageNumber="175">Slide</collectorName>
<collectionCode id="65D2AE7A05762B7FFD7327A3FD11F80B" box="[713,767,1994,2019]" country="New Zealand" name="Dominion Museum" pageId="4" pageNumber="175">DM</collectionCode>
.1.aa.
<emphasis id="31B7EAAD05762B7FFC8627A3FC45F80B" box="[828,939,1994,2019]" italics="true" pageId="4" pageNumber="175">
<typeStatus id="DC78881D05762B7FFC8627A3FC48F80B" box="[828,934,1994,2019]" pageId="4" pageNumber="175" type="holotype">Holotype</typeStatus>
:
</emphasis>
<collectionCode id="65D2AE7A05762B7FFC0C27A3FC01F80B" box="[950,1007,1994,2019]" country="New Zealand" name="Dominion Museum" pageId="4" pageNumber="175">DM</collectionCode>
.1.aa.h!, illustrated on
<figureCitation id="9BF82A3A05762B7FFB5C27A3FAC2F80B" box="[1254,1324,1994,2019]" captionStart="FIGURES 5–9" captionStartId="4.[136,243,1313,1334]" captionTargetBox="[191,1400,192,1285]" captionTargetId="figure-17@4.[164,1424,180,1298]" captionTargetPageId="4" captionText="FIGURES 5–9. Construction of valve and areolae, and different views on fulto- and rimoportulae of M. vodyanitskiyi. 5–6. Outside and inside view of the valve of M. vodyanitskiyi; Fig. 5 shows holotype. 7. Outside and inside view on locular areolae and cribrum, which is perforated by cribral pores. 8. Different views on marginal fultoportulae—they all are surrounded by three satellite pores. 9. Different views on central fultoportula that is surrounded by two satellite pores, and on rimoportula that can be oriented radially, or slightly tangentially. SEM." figureDoi="http://doi.org/10.5281/zenodo.13727957" httpUri="https://zenodo.org/record/13727957/files/figure.png" pageId="4" pageNumber="175">Fig. 5</figureCitation>
.
<emphasis id="31B7EAAD05762B7FFA8127A3FA45F80B" box="[1339,1451,1994,2019]" italics="true" pageId="4" pageNumber="175">
<typeStatus id="DC78881D05762B7FFA8127A3FA4BF80B" box="[1339,1445,1994,2019]" pageId="4" pageNumber="175" type="paratype">Paratype</typeStatus>
:
</emphasis>
<collectionCode id="65D2AE7A05762B7FFF322787FF2FF7EF" box="[136,193,2030,2055]" country="New Zealand" name="Dominion Museum" pageId="4" pageNumber="175">DM</collectionCode>
.1.aa.p!, illustrated on
<figureCitation id="9BF82A3A05762B7FFE0A2787FE1BF7EF" box="[432,501,2030,2055]" captionStart="FIGURES 5–9" captionStartId="4.[136,243,1313,1334]" captionTargetBox="[191,1400,192,1285]" captionTargetId="figure-17@4.[164,1424,180,1298]" captionTargetPageId="4" captionText="FIGURES 5–9. Construction of valve and areolae, and different views on fulto- and rimoportulae of M. vodyanitskiyi. 5–6. Outside and inside view of the valve of M. vodyanitskiyi; Fig. 5 shows holotype. 7. Outside and inside view on locular areolae and cribrum, which is perforated by cribral pores. 8. Different views on marginal fultoportulae—they all are surrounded by three satellite pores. 9. Different views on central fultoportula that is surrounded by two satellite pores, and on rimoportula that can be oriented radially, or slightly tangentially. SEM." figureDoi="http://doi.org/10.5281/zenodo.13727957" httpUri="https://zenodo.org/record/13727957/files/figure.png" pageId="4" pageNumber="175">Fig. 6</figureCitation>
</materialsCitation>
.
</paragraph>
<caption id="57BC663705772B7EFF322461FDCAFB61" ID-DOI="http://doi.org/10.5281/zenodo.13727959" ID-Zenodo-Dep="13727959" httpUri="https://zenodo.org/record/13727959/files/figure.png" pageId="5" pageNumber="176" startId="5.[136,243,1032,1053]" targetBox="[167,1416,212,992]" targetPageId="5" targetType="figure">
<paragraph id="037C36BF05772B7EFF322461FDCAFB61" blockId="5.[136,1452,1032,1161]" pageId="5" pageNumber="176">
<emphasis id="31B7EAAD05772B7EFF322461FED2FBF5" bold="true" box="[136,316,1032,1053]" pageId="5" pageNumber="176">FIGURES 10–13.</emphasis>
Diversity of areolae constructions in
<emphasis id="31B7EAAD05772B7EFD082461FCB4FBF5" box="[690,858,1032,1053]" italics="true" pageId="5" pageNumber="176">
<taxonomicName id="C4C34D3C05772B7EFD082461FCB8FBF5" authorityName="A. M. Lyakh &amp; Ye. D. Bedoshvili" authorityYear="2018" box="[690,854,1032,1053]" class="Bacillariophyceae" family="Thalassiosiraceae" genus="Minidiscus" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="5" pageNumber="176" phylum="Ochrophyta" rank="species" species="vodyanitskiyi">M. vodyanitskiyi</taxonomicName>
.
</emphasis>
SEM.
<emphasis id="31B7EAAD05772B7EFC1A2461FC50FBF5" bold="true" box="[928,958,1032,1053]" pageId="5" pageNumber="176">14.</emphasis>
Dependence between diameters of valves and the presence or absence of filiform growth on areolae ribs in
<taxonomicName id="C4C34D3C05772B7EFD7B2445FC8CFBA9" authorityName="A. M. Lyakh &amp; Ye. D. Bedoshvili" authorityYear="2018" box="[705,866,1068,1089]" class="Bacillariophyceae" family="Thalassiosiraceae" genus="Minidiscus" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="5" pageNumber="176" phylum="Ochrophyta" rank="species" species="vodyanitskiyi">
<emphasis id="31B7EAAD05772B7EFD7B2445FC8CFBA9" box="[705,866,1068,1089]" italics="true" pageId="5" pageNumber="176">M. vodyanitskiyi</emphasis>
</taxonomicName>
; black vertical lines show median values.
<emphasis id="31B7EAAD05772B7EFABF2445FACDFBA9" bold="true" box="[1285,1315,1068,1089]" pageId="5" pageNumber="176">15.</emphasis>
Variability of valve dimensions: from small to largest; the largest valve has no filiform growth on areolae ribs, but in other characteristics it is identical to the small one. SEM. Scale bar is 10 μm.
</paragraph>
</caption>
<paragraph id="037C36BF05772B7EFF0724D0FEA1FB1E" blockId="5.[136,1454,1209,1846]" pageId="5" pageNumber="176">
Slide is deposited to the Collection of the Hydrobionts of the World Ocean, Institute of Marine Biological Research
<collectionCode id="65D2AE7A05772B7EFF3224B4FF2FFB1E" box="[136,193,1245,1270]" country="Myanmar" httpUri="http://biocol.org/urn:lsid:biocol.org:col:14256" lsid="urn:lsid:biocol.org:col:14256" name="Union of Burma Applied Research Institute" pageId="5" pageNumber="176" type="Herbarium">RAS</collectionCode>
, Sevastopol.
</paragraph>
</subSubSection>
<subSubSection id="4BD9653405772B7EFF072568FC40FA42" pageId="5" pageNumber="176" type="etymology">
<paragraph id="037C36BF05772B7EFF072568FC40FA42" blockId="5.[136,1454,1209,1846]" pageId="5" pageNumber="176">
<emphasis id="31B7EAAD05772B7EFF072568FEA6FAF2" bold="true" box="[189,328,1281,1306]" pageId="5" pageNumber="176">Etymology:</emphasis>
—Species is named in honour of a Russian hydrobiologist Prof.
<collectingRegion id="C107F85D05772B7EFBAD2568FB92FAF2" box="[1047,1148,1281,1306]" country="Russia" name="Vladimir" pageId="5" pageNumber="176">Vladimir</collectingRegion>
Alekseevich Vodyanitskiy. He had proved that the Black Sea has high biological productivity, and that there is a mix of waters between the surface and deep layers of the Black Sea. He was a cofounder and a first chief of the Institute of Biology of the Southern Seas, where the slide with species
<typeStatus id="DC78881D05772B7EFE772504FDC1FA6E" box="[461,559,1389,1414]" pageId="5" pageNumber="176" type="holotype">holotype</typeStatus>
is deposited. Also, the species name is a reminder that described diatoms were found during the expedition on the research vessel ‘Prof. Vodyanitskiy’.
</paragraph>
</subSubSection>
<subSubSection id="4BD9653405772B7EFF0725DCFF54F922" pageId="5" pageNumber="176" type="diagnosis">
<paragraph id="037C36BF05772B7EFF0725DCFF54F9D2" blockId="5.[136,1454,1209,1846]" pageId="5" pageNumber="176">
<emphasis id="31B7EAAD05772B7EFF0725DCFE25FA26" bold="true" box="[189,459,1461,1486]" pageId="5" pageNumber="176">Differential diagnosis:</emphasis>
—The diameter of the valve, the variability of areolae density, the position and the morphology of RP, CFP, and MFP, the number of MFPs of
<taxonomicName id="C4C34D3C05772B7EFC9B25B0FC34FA1A" authorityName="A. M. Lyakh &amp; Ye. D. Bedoshvili" authorityYear="2018" box="[801,986,1497,1522]" class="Bacillariophyceae" family="Thalassiosiraceae" genus="Minidiscus" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="5" pageNumber="176" phylum="Ochrophyta" rank="species" species="vodyanitskiyi">
<emphasis id="31B7EAAD05772B7EFC9B25B0FC34FA1A" box="[801,986,1497,1522]" italics="true" pageId="5" pageNumber="176">M. vodyanitskiyi</emphasis>
</taxonomicName>
are identical to those characteristics of
<taxonomicName id="C4C34D3C05772B7EFA2D25B0FE65F9FE" authority="Makarova" authorityName="Makarova" authorityYear="1979" class="Coscinodiscophyceae" family="Thalassiosiraceae" genus="Thalassiosira" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="5" pageNumber="176" phylum="Ochrophyta" rank="species" species="proschkinae">
<emphasis id="31B7EAAD05772B7EFA2D25B0FEFEF9FE" italics="true" pageId="5" pageNumber="176">T. proschkinae</emphasis>
Makarova
</taxonomicName>
,
<taxonomicName id="C4C34D3C05772B7EFE2C2594FC6AF9FE" authority="(Takano) J. S. Park &amp; J. H. Lee" authorityName="J. S. Park &amp; J. H. Lee" baseAuthorityName="Takano" box="[406,900,1533,1558]" class="Bacillariophyceae" family="Thalassiosiraceae" genus="Minidiscus" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="5" pageNumber="176" phylum="Ochrophyta" rank="species" species="spinulatus">
<emphasis id="31B7EAAD05772B7EFE2C2594FDC0F9FE" box="[406,558,1533,1558]" italics="true" pageId="5" pageNumber="176">M. spinulatus</emphasis>
(Takano) J.S. Park &amp; J.H. Lee
</taxonomicName>
and
<taxonomicName id="C4C34D3C05772B7EFC002594FF54F9D2" authority="(Makarova) J. S. Park &amp; J. H. Lee." authorityName="J. S. Park &amp; J. H. Lee." baseAuthorityName="Makarova" class="Coscinodiscophyceae" family="Thalassiosiraceae" genus="Thalassiosira" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="5" pageNumber="176" phylum="Ochrophyta" rank="species" species="proschkinae">
<emphasis id="31B7EAAD05772B7EFC002594FB89F9FE" box="[954,1127,1533,1558]" italics="true" pageId="5" pageNumber="176">M. proschkinae</emphasis>
(Makarova) J.S. Park &amp; J.H. Lee.
</taxonomicName>
</paragraph>
<paragraph id="037C36BF05772B7EFF07262CFF54F922" blockId="5.[136,1454,1209,1846]" pageId="5" pageNumber="176">
<taxonomicName id="C4C34D3C05772B7EFF07262CFE93F9B6" authorityName="A. M. Lyakh &amp; Ye. D. Bedoshvili" authorityYear="2018" box="[189,381,1605,1630]" class="Bacillariophyceae" family="Thalassiosiraceae" genus="Minidiscus" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="5" pageNumber="176" phylum="Ochrophyta" rank="species" species="vodyanitskiyi">
<emphasis id="31B7EAAD05772B7EFF07262CFE93F9B6" box="[189,381,1605,1630]" italics="true" pageId="5" pageNumber="176">M. vodyanitskiyi</emphasis>
</taxonomicName>
differs from those species in combination of characteristics: three SLPs around marginal fultoportulae, where the angle between adjacent SLPs is 90°, and the middle pore is directed towards the valve edge; two SLPs around the central fultoportulae located opposite each other; the loculate areolae surrounded by siliceous ribs.
</paragraph>
</subSubSection>
<subSubSection id="4BD9653405772B7EFF0726BCFD8FF8DE" pageId="5" pageNumber="176" type="distribution">
<paragraph id="037C36BF05772B7EFF0726BCFD8FF8DE" blockId="5.[136,1454,1209,1846]" pageId="5" pageNumber="176">
<emphasis id="31B7EAAD05772B7EFF0726BCFE9BF906" bold="true" box="[189,373,1749,1774]" pageId="5" pageNumber="176">Distribution:—</emphasis>
<typeStatus id="DC78881D05772B7EFECF26BCFE43F906" box="[373,429,1749,1774]" pageId="5" pageNumber="176">Type</typeStatus>
material from the Sea of Azov. Specimens matching
<typeStatus id="DC78881D05772B7EFBAA26BCFBAEF906" box="[1040,1088,1749,1774]" pageId="5" pageNumber="176">type</typeStatus>
material are sporadically found in the upper layer (
<quantity id="C43B9B5A05772B7EFED12690FE2BF8FA" box="[363,453,1785,1810]" metricMagnitude="-2" metricUnit="m" metricValue="2.5" metricValueMax="5.0" metricValueMin="0.0" pageId="5" pageNumber="176" unit="cm" value="2.5" valueMax="5.0" valueMin="0.0">0–5 cm</quantity>
) of the New Azov sediments of the Sea of Azov, and mentioned as
<taxonomicName id="C4C34D3C05772B7EFB512690FDB3F8DE" authority="(Gogorev &amp; Kovaleva 2017)" baseAuthorityName="Gogorev &amp; Kovaleva" baseAuthorityYear="2017" class="Coscinodiscophyceae" family="Thalassiosiraceae" genus="Thalassiosira" higherTaxonomySource="GBIF" isUncertain="true" kingdom="Chromista" order="Thalassiosirales" pageId="5" pageNumber="176" phylum="Ochrophyta" rank="species" species="proschkinae">
<emphasis id="31B7EAAD05772B7EFB512690FA6DF8FA" box="[1259,1411,1785,1810]" italics="true" pageId="5" pageNumber="176">Thalassiosira</emphasis>
cf.
<emphasis id="31B7EAAD05772B7EFF322774FEFEF8DE" box="[136,272,1821,1846]" italics="true" pageId="5" pageNumber="176">proschkinae</emphasis>
(
<bibRefCitation id="67524B4E05772B7EFEA42774FDBBF8DE" author="Gogorev, R. M. &amp; Kovaleva, G. V." box="[286,597,1821,1846]" pageId="5" pageNumber="176" pagination="37 - 56" refId="ref6542" refString="Gogorev, R. M. &amp; Kovaleva, G. V. (2017) Thalassiosira azovica sp. nov. and some other Thalassiosira species (Bacillariophyta) from Holocene sediments of the Sea of Azov. Novosti Sistematiki Nizshih Rasteniy 51: 37 - 56." type="journal article" year="2017">Gogorev &amp; Kovaleva 2017</bibRefCitation>
)
</taxonomicName>
.
</paragraph>
</subSubSection>
</treatment>
</document>