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<document id="BDA2247C535C8140B0F54D3C94C9ED71" ID-DOI="10.11646/phytotaxa.669.1.7" ID-ISSN="1179-3163" ID-Zenodo-Dep="14520136" IM.bibliography_approvedBy="felipe" IM.illustrations_approvedBy="juliana" IM.materialsCitations_approvedBy="juliana" IM.metadata_approvedBy="felipe" IM.tables_approvedBy="juliana" IM.taxonomicNames_approvedBy="juliana" IM.treatments_approvedBy="juliana" checkinTime="1734553430793" checkinUser="felipe" docAuthor="Bessudova, Anna, Firsova, Alena D. &amp; Likhoshway, Yelena V." docDate="2024" docId="137E1118EA62563EFF61E2F4FA42451E" docLanguage="en" docName="phytotaxa.669.1.067-074.pdf" docOrigin="Phytotaxa 669 (1)" docSource="https://doi.org/10.11646/phytotaxa.669.1.7" docStyle="DocumentStyle:96748F8F1B6C902996E134952A3A36B9.13:Phytotaxa.2014-.journal_article" docStyleId="96748F8F1B6C902996E134952A3A36B9" docStyleName="Phytotaxa.2014-.journal_article" docStyleVersion="13" docTitle="Chrysosphaerella baikalensis Popovskaya 1971" docType="treatment" docVersion="1" lastPageNumber="72" masterDocId="EF476960EA63563BFFDCE600FFC14705" masterDocTitle="Redescription of Chrysosphaerella baikalensis (Chrysophyceae, Chromulinales) with new data on the ultrastructure of its stomatocysts" masterLastPageNumber="74" masterPageNumber="67" pageNumber="68" updateTime="1741864729713" updateUser="juliana" zenodo-license-figures="UNSPECIFIED" zenodo-license-treatments="UNSPECIFIED">
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<mods:title id="EF39118BC385407DA347FF9EDBAD8E56">Redescription of Chrysosphaerella baikalensis (Chrysophyceae, Chromulinales) with new data on the ultrastructure of its stomatocysts</mods:title>
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<mods:namePart id="44D37760715370B2F8B8AC8EFC98830E">Bessudova, Anna</mods:namePart>
<mods:nameIdentifier id="9E2FB6B6EE21F678BB708C3EDC4A1E08" type="ORCID">0000-0002-6569-0052</mods:nameIdentifier>
<mods:affiliation id="4F754B434E7FF6824DA25F1C462711C3">Limnological Institute, Siberian Branch of the Russian Academy of Sciences, 3 Ulan-Batorskaya, Irkutsk 664033, Russia</mods:affiliation>
<mods:nameIdentifier id="2217E92CBBCAF7349E177C9BA2F6EAD5" type="email">annabessudova@mail.ru</mods:nameIdentifier>
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<mods:namePart id="E3792A6149C8AD552FEBADAABE75979D">Firsova, Alena D.</mods:namePart>
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<mods:affiliation id="4385A2FB8404708B8A71FEEDB661CC12">Limnological Institute, Siberian Branch of the Russian Academy of Sciences, 3 Ulan-Batorskaya, Irkutsk 664033, Russia</mods:affiliation>
<mods:nameIdentifier id="9B491330B919F5E141FB9D941EB8D475" type="email">adfir71@yandex.ru</mods:nameIdentifier>
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<mods:namePart id="69C3E1E2559794B47B25D10E67847E3F">Likhoshway, Yelena V.</mods:namePart>
<mods:nameIdentifier id="CC904C9D3FE34BFB4E7E1AC83DD70434" type="ORCID">0000-0002-2432-9260</mods:nameIdentifier>
<mods:affiliation id="B4931F633BD61C0B9CA24F92CEA12044">Limnological Institute, Siberian Branch of the Russian Academy of Sciences, 3 Ulan-Batorskaya, Irkutsk 664033, Russia</mods:affiliation>
<mods:nameIdentifier id="D2F1EEFFA6173ECA236BAAFCC2455AF2" type="email">likhoshway@mail.ru</mods:nameIdentifier>
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<mods:title id="CFF775CF110C7C205ECB73AA21A15D09">Phytotaxa</mods:title>
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<mods:date id="1E71FCCD61B735AD7A5442113458A888">2024</mods:date>
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<treatment id="137E1118EA62563EFF61E2F4FA42451E" LSID="urn:lsid:plazi:treatment:137E1118EA62563EFF61E2F4FA42451E" httpUri="http://treatment.plazi.org/id/137E1118EA62563EFF61E2F4FA42451E" lastPageId="5" lastPageNumber="72" pageId="1" pageNumber="68">
<subSubSection id="D3CDF385EA62563AFF61E2F4FB3C420B" box="[189,1277,1268,1295]" pageId="1" pageNumber="68" type="nomenclature">
<paragraph id="9B68A00EEA62563AFF61E2F4FB3C420B" blockId="1.[136,1452,980,2086]" box="[189,1277,1268,1295]" pageId="1" pageNumber="68">
<taxonomicName id="5CD7DB8DEA62563AFF61E2F4FB3C420B" authority="Popovskaya (1971: 9) emend. Bessudova, Firsova &amp; Likhoshway" authorityName="Popovskaya" authorityYear="1971" box="[189,1277,1268,1295]" class="Chrysophyceae" family="Paraphysomonadaceae" genus="Chrysosphaerella" kingdom="Chromista" order="Synurales" pageId="1" pageNumber="68" phylum="Ochrophyta" rank="species" species="baikalensis">
<emphasis id="A9A37C1CEA62563AFF61E2F4FD67420B" bold="true" box="[189,678,1268,1295]" pageId="1" pageNumber="68">
<emphasis id="A9A37C1CEA62563AFF61E2F4FDD1420A" bold="true" box="[189,528,1268,1295]" italics="true" pageId="1" pageNumber="68">Chrysosphaerella baikalensis</emphasis>
<bibRefCitation id="FF46DDFFEA62563AFDCBE2F4FD67420B" author="Popovskaya, G. I." box="[535,678,1268,1294]" pageId="1" pageNumber="68" pagination="9 - 12" refId="ref4462" refString="Popovskaya, G. I. (1971) Species nova Chrysosphaerellae Laut. in plancto lacus Baikal. Novosti sistematiki nizshikh rastenii 8: 9 - 12." type="journal article" year="1971">Popovskaya</bibRefCitation>
</emphasis>
(1971: 9) emend. Bessudova, Firsova &amp; Likhoshway
</taxonomicName>
</paragraph>
</subSubSection>
<subSubSection id="D3CDF385EA62563AFF61E318FC134002" pageId="1" pageNumber="68" type="description">
<paragraph id="9B68A00EEA62563AFF61E318FC134002" blockId="1.[136,1452,980,2086]" pageId="1" pageNumber="68">
<emphasis id="A9A37C1CEA62563AFF61E318FE864237" bold="true" box="[189,327,1304,1330]" pageId="1" pageNumber="68">Description</emphasis>
: There are both individual cells with two flagella, slightly elongated, ranging from obovate to nearly spherical, measuring 9–15 × 7–12 μm, and lacking mucous membranes, as well as cells grouped in colonies of 3–6, forming spherical or oblong clusters, 18–31 μm in diameter. Each cell contains two chromatophores, typically elliptical and laterally compressed. The two flagella are of unequal length: the longer reaching up to 36 μm, and the shorter measuring 7 μm (
<bibRefCitation id="FF46DDFFEA62563AFE8CE3A8FDDC42C7" author="Popovskaya, G. I." box="[336,541,1448,1474]" pageId="1" pageNumber="68" pagination="9 - 12" refId="ref4462" refString="Popovskaya, G. I. (1971) Species nova Chrysosphaerellae Laut. in plancto lacus Baikal. Novosti sistematiki nizshikh rastenii 8: 9 - 12." type="journal article" year="1971">Popovskaya 1971</bibRefCitation>
). The cells are covered with numerous plate-like and spine-like siliceous scales.
<specimenCount id="8DD16B87EA62563AFF54E3CDFF3F42E2" box="[136,254,1485,1511]" count="4" pageId="1" pageNumber="68" type="generic" typeStatus="types">Four types</specimenCount>
of plate-like scales are present: small elliptical (1.4–2.5 × 0.9–1.3 μm) (
<figureCitation id="03ECBC8BEA62563AFBC5E3CCFB6842E2" box="[1049,1193,1484,1511]" captionStart="FIGURES 1–9" captionStartId="2.[136,243,1866,1888]" captionTargetBox="[151,1435,190,1842]" captionTargetId="figure-30@2.[151,1435,190,1842]" captionTargetPageId="2" captionText="FIGURES 1–9. Micrographs of ultrastructure Chrysosphaerella baikalensis. Figures 1, 4. A disintegrated colony of several cells, SEM. Figures 2, 5. Different types of plate scales and the basal plates of the spines, SEM. Figure 3. Large circular holes at the spine base, SEM. Figure 6.An individual spine, SEM. Figures 7, 8. Individual plate scales of different types, TEM. Figure 9.A plate scales of different types, SEM. Scale bars: 7, 8—2 μm; 2, 3, 4, 5, 9—5 μm; 6—20 μm; 1—40 μm." figureDoi="http://doi.org/10.5281/zenodo.14520138" httpUri="https://zenodo.org/record/14520138/files/figure.png" pageId="1" pageNumber="68">Figs. 2 and 5</figureCitation>
), large elliptical (3.6–4 × 2–3.2 μm) (
<figureCitation id="03ECBC8BEA62563AFEFEE3F0FE10410F" box="[290,465,1520,1547]" captionStart="FIGURES 1–9" captionStartId="2.[136,243,1866,1888]" captionTargetBox="[151,1435,190,1842]" captionTargetId="figure-30@2.[151,1435,190,1842]" captionTargetPageId="2" captionText="FIGURES 1–9. Micrographs of ultrastructure Chrysosphaerella baikalensis. Figures 1, 4. A disintegrated colony of several cells, SEM. Figures 2, 5. Different types of plate scales and the basal plates of the spines, SEM. Figure 3. Large circular holes at the spine base, SEM. Figure 6.An individual spine, SEM. Figures 7, 8. Individual plate scales of different types, TEM. Figure 9.A plate scales of different types, SEM. Scale bars: 7, 8—2 μm; 2, 3, 4, 5, 9—5 μm; 6—20 μm; 1—40 μm." figureDoi="http://doi.org/10.5281/zenodo.14520138" httpUri="https://zenodo.org/record/14520138/files/figure.png" pageId="1" pageNumber="68">Figs. 2, 5 and 7</figureCitation>
), large rounded (3.2–4.7 × 2.4–3.9 μm) (
<figureCitation id="03ECBC8BEA62563AFC45E3F0FB89410F" box="[921,1096,1520,1546]" captionStart="FIGURES 1–9" captionStartId="2.[136,243,1866,1888]" captionTargetBox="[151,1435,190,1842]" captionTargetId="figure-30@2.[151,1435,190,1842]" captionTargetPageId="2" captionText="FIGURES 1–9. Micrographs of ultrastructure Chrysosphaerella baikalensis. Figures 1, 4. A disintegrated colony of several cells, SEM. Figures 2, 5. Different types of plate scales and the basal plates of the spines, SEM. Figure 3. Large circular holes at the spine base, SEM. Figure 6.An individual spine, SEM. Figures 7, 8. Individual plate scales of different types, TEM. Figure 9.A plate scales of different types, SEM. Scale bars: 7, 8—2 μm; 2, 3, 4, 5, 9—5 μm; 6—20 μm; 1—40 μm." figureDoi="http://doi.org/10.5281/zenodo.14520138" httpUri="https://zenodo.org/record/14520138/files/figure.png" pageId="1" pageNumber="68">Figs. 2, 8 and 9</figureCitation>
), and large subcircular (2.8–3.9 × 3–4.2 μm) (
<figureCitation id="03ECBC8BEA62563AFEFCE014FEA2412B" box="[288,355,1556,1582]" captionStart="FIGURES 1–9" captionStartId="2.[136,243,1866,1888]" captionTargetBox="[151,1435,190,1842]" captionTargetId="figure-30@2.[151,1435,190,1842]" captionTargetPageId="2" captionText="FIGURES 1–9. Micrographs of ultrastructure Chrysosphaerella baikalensis. Figures 1, 4. A disintegrated colony of several cells, SEM. Figures 2, 5. Different types of plate scales and the basal plates of the spines, SEM. Figure 3. Large circular holes at the spine base, SEM. Figure 6.An individual spine, SEM. Figures 7, 8. Individual plate scales of different types, TEM. Figure 9.A plate scales of different types, SEM. Scale bars: 7, 8—2 μm; 2, 3, 4, 5, 9—5 μm; 6—20 μm; 1—40 μm." figureDoi="http://doi.org/10.5281/zenodo.14520138" httpUri="https://zenodo.org/record/14520138/files/figure.png" pageId="1" pageNumber="68">Fig. 9</figureCitation>
) scales. The plate-like scales have a raised, unpatterned rim along the edge, measuring 0.3–0.6 μm in width. On the inner surface of the rim, a series of short radial ribs, 0.1–0.32 μm in diameter, converge towards the center, enclosing a central unpatterned area of elliptical or round shape (
<figureCitation id="03ECBC8BEA62563AFC63E05CFB964173" box="[959,1111,1628,1655]" captionStart="FIGURES 1–9" captionStartId="2.[136,243,1866,1888]" captionTargetBox="[151,1435,190,1842]" captionTargetId="figure-30@2.[151,1435,190,1842]" captionTargetPageId="2" captionText="FIGURES 1–9. Micrographs of ultrastructure Chrysosphaerella baikalensis. Figures 1, 4. A disintegrated colony of several cells, SEM. Figures 2, 5. Different types of plate scales and the basal plates of the spines, SEM. Figure 3. Large circular holes at the spine base, SEM. Figure 6.An individual spine, SEM. Figures 7, 8. Individual plate scales of different types, TEM. Figure 9.A plate scales of different types, SEM. Scale bars: 7, 8—2 μm; 2, 3, 4, 5, 9—5 μm; 6—20 μm; 1—40 μm." figureDoi="http://doi.org/10.5281/zenodo.14520138" httpUri="https://zenodo.org/record/14520138/files/figure.png" pageId="1" pageNumber="68">Figs. 7 and 8</figureCitation>
). The spine scales, measuring 21–37(47) μm in length, taper slightly towards a forked tip and consist of a shaft and a bobbin-like structure with two bases. The basal base plate is 3.5–3.9 μm in diameter, while the second base plate measures 4.1–4.7 μm, spaced 0.8–1 μm apart (
<figureCitation id="03ECBC8BEA62563AFF27E0C8FE4F41E6" box="[251,398,1736,1763]" captionStart="FIGURES 1–9" captionStartId="2.[136,243,1866,1888]" captionTargetBox="[151,1435,190,1842]" captionTargetId="figure-30@2.[151,1435,190,1842]" captionTargetPageId="2" captionText="FIGURES 1–9. Micrographs of ultrastructure Chrysosphaerella baikalensis. Figures 1, 4. A disintegrated colony of several cells, SEM. Figures 2, 5. Different types of plate scales and the basal plates of the spines, SEM. Figure 3. Large circular holes at the spine base, SEM. Figure 6.An individual spine, SEM. Figures 7, 8. Individual plate scales of different types, TEM. Figure 9.A plate scales of different types, SEM. Scale bars: 7, 8—2 μm; 2, 3, 4, 5, 9—5 μm; 6—20 μm; 1—40 μm." figureDoi="http://doi.org/10.5281/zenodo.14520138" httpUri="https://zenodo.org/record/14520138/files/figure.png" pageId="1" pageNumber="68">Figs. 2 and 5</figureCitation>
). A large circular hole, 0.7–1.1 μm in diameter, is present at the base of the spine (
<figureCitation id="03ECBC8BEA62563AFAFBE0C8FAAA41E7" box="[1319,1387,1736,1762]" captionStart="FIGURES 1–9" captionStartId="2.[136,243,1866,1888]" captionTargetBox="[151,1435,190,1842]" captionTargetId="figure-30@2.[151,1435,190,1842]" captionTargetPageId="2" captionText="FIGURES 1–9. Micrographs of ultrastructure Chrysosphaerella baikalensis. Figures 1, 4. A disintegrated colony of several cells, SEM. Figures 2, 5. Different types of plate scales and the basal plates of the spines, SEM. Figure 3. Large circular holes at the spine base, SEM. Figure 6.An individual spine, SEM. Figures 7, 8. Individual plate scales of different types, TEM. Figure 9.A plate scales of different types, SEM. Scale bars: 7, 8—2 μm; 2, 3, 4, 5, 9—5 μm; 6—20 μm; 1—40 μm." figureDoi="http://doi.org/10.5281/zenodo.14520138" httpUri="https://zenodo.org/record/14520138/files/figure.png" pageId="1" pageNumber="68">Fig. 3</figureCitation>
). The shaft’s thickness from the base to the tip has a ratio of approximately 1.5:1.
</paragraph>
</subSubSection>
<subSubSection id="D3CDF385EA62563AFF61E110FC044092" pageId="1" pageNumber="68" type="materials_examined">
<paragraph id="9B68A00EEA62563AFF61E110FB174076" blockId="1.[136,1452,980,2086]" pageId="1" pageNumber="68">
<materialsCitation id="2BBFAA53EA62563AFF61E110FB174076" collectingDate="2023-06-22" collectionCode="LIN" country="Russia" county="Lake Baikal" location="Lake Baikal" municipality="Material" pageId="1" pageNumber="68" specimenCode="18851" specimenCount="1" stateProvince="Irkutsk region" typeStatus="neotype">
<emphasis id="A9A37C1CEA62563AFF61E110FE3B402F" bold="true" box="[189,506,1808,1834]" pageId="1" pageNumber="68">
<typeStatus id="446C1EACEA62563AFF61E110FEDE402F" box="[189,287,1808,1834]" pageId="1" pageNumber="68" type="neotype">Neotype</typeStatus>
(here designated)
</emphasis>
: Portion of a single gathering of cells on SEM stubs No.
<specimenCode id="CB710875EA62563AFB79E110FB2A402E" box="[1189,1259,1808,1835]" pageId="1" pageNumber="68">18851</specimenCode>
deposited at the herbarium of the Limnological Institute, Siberian Branch of the Russian Academy of Sciences, Irkutsk (
<collectionCode id="FDC638CBEA62563AFADAE134FAFB404B" box="[1286,1338,1844,1870]" pageId="1" pageNumber="68">LIN</collectionCode>
). Material from
<collectingCounty id="7209D882EA62563AFF19E158FE914077" box="[197,336,1880,1906]" pageId="1" pageNumber="68">Lake Baikal</collectingCounty>
, in the
<collectingRegion id="59136EECEA62563AFE7EE158FD834077" box="[418,578,1880,1906]" country="Russia" name="Irkutsk" pageId="1" pageNumber="68">Irkutsk region</collectingRegion>
,
<collectingCountry id="E3C0E09EEA62563AFD91E158FD5A4077" box="[589,667,1880,1906]" name="Russia" pageId="1" pageNumber="68">Russia</collectingCountry>
, on
<date id="EF6986CEEA62563AFD15E159FCA84077" box="[713,873,1880,1907]" pageId="1" pageNumber="68" value="2023-06-22">
<collectingDate id="FF2D7F26EA62563AFD15E159FCA84077" box="[713,873,1880,1907]" pageId="1" pageNumber="68" value="2023-06-22">June 22, 2023</collectingDate>
</date>
.
<figureCitation id="03ECBC8BEA62563AFCAFE158FC134077" box="[883,978,1880,1906]" captionStart="FIGURES 1–9" captionStartId="2.[136,243,1866,1888]" captionTargetBox="[151,1435,190,1842]" captionTargetId="figure-30@2.[151,1435,190,1842]" captionTargetPageId="2" captionText="FIGURES 1–9. Micrographs of ultrastructure Chrysosphaerella baikalensis. Figures 1, 4. A disintegrated colony of several cells, SEM. Figures 2, 5. Different types of plate scales and the basal plates of the spines, SEM. Figure 3. Large circular holes at the spine base, SEM. Figure 6.An individual spine, SEM. Figures 7, 8. Individual plate scales of different types, TEM. Figure 9.A plate scales of different types, SEM. Scale bars: 7, 8—2 μm; 2, 3, 4, 5, 9—5 μm; 6—20 μm; 1—40 μm." figureDoi="http://doi.org/10.5281/zenodo.14520138" httpUri="https://zenodo.org/record/14520138/files/figure.png" pageId="1" pageNumber="68">Figure 2</figureCitation>
illustrates the neotype.
</materialsCitation>
</paragraph>
<paragraph id="9B68A00EEA62563AFF61E17CFC044092" blockId="1.[136,1452,980,2086]" box="[189,965,1916,1944]" pageId="1" pageNumber="68">
<emphasis id="A9A37C1CEA62563AFF61E17CFE974093" bold="true" box="[189,342,1916,1942]" pageId="1" pageNumber="68">
<typeStatus id="446C1EACEA62563AFF61E17CFF394093" box="[189,248,1916,1942]" pageId="1" pageNumber="68">Type</typeStatus>
locality
</emphasis>
: Lake Baikal, Latitude/Longitude:
<geoCoordinate id="FEE3C6C9EA62563AFD3EE17DFC86409D" box="[738,839,1917,1944]" degrees="53" direction="north" minutes="13" orientation="latitude" pageId="1" pageNumber="68" precision="925" value="53.216667">53°13′ N</geoCoordinate>
/
<geoCoordinate id="FEE3C6C9EA62563AFC8DE17DFC004092" box="[849,961,1917,1944]" degrees="107" direction="east" minutes="45" orientation="longitude" pageId="1" pageNumber="68" precision="925" value="107.75">107°45′ E</geoCoordinate>
.
</paragraph>
</subSubSection>
<subSubSection id="D3CDF385EA62563EFF61E1A0FA42451E" lastPageId="5" lastPageNumber="72" pageId="1" pageNumber="68" type="biology_ecology">
<paragraph id="9B68A00EEA62563AFF61E1A0FF344F23" blockId="1.[136,1452,980,2086]" pageId="1" pageNumber="68">
<emphasis id="A9A37C1CEA62563AFF61E1A0FEDD40BF" bold="true" box="[189,284,1952,1978]" pageId="1" pageNumber="68">Ecology</emphasis>
: The species grow in Lake Baikal during the under-ice period from March to May (
<bibRefCitation id="FF46DDFFEA62563AFB04E1A0FA6240BF" author="Popovskaya, G. I." box="[1240,1443,1952,1978]" pageId="1" pageNumber="68" pagination="9 - 12" refId="ref4462" refString="Popovskaya, G. I. (1971) Species nova Chrysosphaerellae Laut. in plancto lacus Baikal. Novosti sistematiki nizshikh rastenii 8: 9 - 12." type="journal article" year="1971">Popovskaya 1971</bibRefCitation>
) at a temperature of 0.04–0.6 ℃ (
<bibRefCitation id="FF46DDFFEA62563AFE29E1C4FD3140DB" author="Bessudova, A. &amp; Firsova, A. &amp; Hilkhanova, D. &amp; Makarov, M. &amp; Sakirko, M. &amp; Bashenkhaeva, M. &amp; Khanaev, I. &amp; Zakharova, Y. &amp; Likhoshway, Y." box="[501,752,1988,2014]" pageId="1" pageNumber="68" refId="ref3754" refString="Bessudova, A., Firsova, A., Hilkhanova, D., Makarov, M., Sakirko, M., Bashenkhaeva, M., Khanaev, I., Zakharova, Y. &amp; Likhoshway, Y. (2023) Two new species, Mallomonas baicalensis sp. nov. and M. grachevii sp. nov. (Synurales Chrysophyceae), found under the ice of Lake Baikal. Water 15: 2250. https: // doi. org / 10.3390 / w 15122250" type="journal volume" year="2023">
Bessudova
<emphasis id="A9A37C1CEA62563AFDABE1C5FD6E40DB" box="[631,687,1988,2014]" italics="true" pageId="1" pageNumber="68">et al.</emphasis>
2023
</bibRefCitation>
;
<bibRefCitation id="FF46DDFFEA62563AFD20E1C4FBDA40DB" author="Bashenkhaeva, M. &amp; Zakharova, Y. R. &amp; Galachyants, Y. P. &amp; Petrova, D. P. &amp; Makarov, M. M. &amp; Sakirko, M. V. &amp; Bessudova, A. Yu. &amp; Smolin, I. N. &amp; Khanaev, I. V. &amp; Likhoshway, Y. V." box="[764,1051,1988,2014]" pageId="1" pageNumber="68" refId="ref3569" refString="Bashenkhaeva, M., Zakharova, Y. R., Galachyants, Y. P., Petrova, D. P., Makarov, M. M., Sakirko, M. V., Bessudova, A. Yu., Smolin, I. N., Khanaev, I. V. &amp; Likhoshway, Y. V. (2024) The phenomenon of high abundance of flagellates during the ice cover period in Lake Baikal according to microscopy and metabarcoding. Journal of Great Lakes Research. [In press]" type="book" year="2024">
Bashenkhaeva
<emphasis id="A9A37C1CEA62563AFC78E1C5FC1D40DB" box="[932,988,1988,2014]" italics="true" pageId="1" pageNumber="68">et al.</emphasis>
<quantity id="5C2F0DEBEA62563AFC3FE1C4FBDA40DB" box="[995,1051,1988,2014]" metricMagnitude="1" metricUnit="m" metricValue="5.14096" pageId="1" pageNumber="68" unit="in" value="2024.0">2024</quantity>
</bibRefCitation>
in press) and during the open water period (June) at a temperature of 3.6–4.5 °С; individual plate and spines scales are found up to 11.5 °С (Bessudova
<emphasis id="A9A37C1CEA62563AFA4BE1E9FF644F23" italics="true" pageId="1" pageNumber="68">et al.</emphasis>
2024).
</paragraph>
<caption id="CFA8F086EA615639FF54E14AFC8640CE" ID-DOI="http://doi.org/10.5281/zenodo.14520138" ID-Zenodo-Dep="14520138" httpUri="https://zenodo.org/record/14520138/files/figure.png" pageId="2" pageNumber="69" startId="2.[136,243,1866,1888]" targetBox="[151,1435,190,1842]" targetPageId="2" targetType="figure">
<paragraph id="9B68A00EEA615639FF54E14AFC8640CE" blockId="2.[136,1452,1866,1996]" pageId="2" pageNumber="69">
<emphasis id="A9A37C1CEA615639FF54E14AFEE5405A" bold="true" box="[136,292,1866,1888]" pageId="2" pageNumber="69">FIGURES 1–9.</emphasis>
Micrographs of ultrastructure
<taxonomicName id="5CD7DB8DEA615639FD91E14AFCA8405A" authorityName="Popovskaya" authorityYear="1971" box="[589,873,1866,1887]" class="Chrysophyceae" family="Paraphysomonadaceae" genus="Chrysosphaerella" kingdom="Chromista" order="Synurales" pageId="2" pageNumber="69" phylum="Ochrophyta" rank="species" species="baikalensis">
<emphasis id="A9A37C1CEA615639FD91E14AFCA8405A" box="[589,873,1866,1887]" italics="true" pageId="2" pageNumber="69">Chrysosphaerella baikalensis</emphasis>
</taxonomicName>
. Figures 1, 4. A disintegrated colony of several cells, SEM. Figures 2, 5. Different types of plate scales and the basal plates of the spines, SEM. Figure 3. Large circular holes at the spine base, SEM. Figure 6. An individual spine, SEM. Figures 7, 8. Individual plate scales of different types, TEM. Figure 9. A plate scales of different types, SEM. Scale bars: 7, 8—2 μm; 2, 3, 4, 5, 9—5 μm; 6—20 μm; 1—40 μm.
</paragraph>
</caption>
<caption id="CFA8F086EA605638FF54E0F2FDCB409D" ID-DOI="http://doi.org/10.5281/zenodo.14520140" ID-Zenodo-Dep="14520140" httpUri="https://zenodo.org/record/14520140/files/figure.png" pageId="3" pageNumber="70" startId="3.[136,243,1778,1800]" targetBox="[151,1436,190,1753]" targetPageId="3" targetType="figure">
<paragraph id="9B68A00EEA605638FF54E0F2FDCB409D" blockId="3.[136,1452,1778,1944]" pageId="3" pageNumber="70">
<emphasis id="A9A37C1CEA605638FF54E0F2FEFC4002" bold="true" box="[136,317,1778,1800]" pageId="3" pageNumber="70">FIGURES 10–18.</emphasis>
Micrographs of stomatocysts
<taxonomicName id="5CD7DB8DEA605638FDB7E0F3FD344002" authorityName="Popovskaya" authorityYear="1971" box="[619,757,1778,1800]" class="Chrysophyceae" family="Paraphysomonadaceae" genus="Chrysosphaerella" kingdom="Chromista" order="Synurales" pageId="3" pageNumber="70" phylum="Ochrophyta" rank="species" species="baikalensis">
<emphasis id="A9A37C1CEA605638FDB7E0F3FD344002" box="[619,757,1778,1800]" italics="true" pageId="3" pageNumber="70">C. baikalensis</emphasis>
</taxonomicName>
. Figures 10–13. Immature stomatocysts of Form A with a needle-like surface covered with plate scales (Figure 12, a stomatocyst combining two forms of surface ornamentation: a white arrow shows a needlelike outgrowths surface; black arrows show areas of a smooth surface), SEM. Figures 14–16. A stomatocysts covered with plate scales (Figure 16, the arrow shows the surface of the stomatocyst at high-resolution), SEM. Figures 17, 18, Stomatocysts of Form B, with a smooth surface, SEM. Scale bars: 5 μm.
</paragraph>
</caption>
<paragraph id="9B68A00EEA605638FF61E1C6FC8C40E4" blockId="3.[136,1451,1990,2089]" box="[189,845,1990,2017]" pageId="3" pageNumber="70">
<emphasis id="A9A37C1CEA605638FF61E1C6FE4040E5" bold="true" box="[189,385,1990,2016]" pageId="3" pageNumber="70">Stomatocyst 507</emphasis>
Firsova &amp; Bessudova nov. (
<figureCitation id="03ECBC8BEA605638FD62E1C7FC8440E4" box="[702,837,1991,2017]" captionStart="FIGURES 10–18" captionStartId="3.[136,243,1778,1800]" captionTargetBox="[151,1436,190,1753]" captionTargetId="figure-18@3.[151,1436,190,1754]" captionTargetPageId="3" captionText="FIGURES 10–18. Micrographs of stomatocysts C. baikalensis. Figures 10–13. Immature stomatocysts of Form A with a needle-like surface covered with plate scales (Figure 12, a stomatocyst combining two forms of surface ornamentation: a white arrow shows a needlelike outgrowths surface; black arrows show areas of a smooth surface), SEM. Figures 14–16. A stomatocysts covered with plate scales (Figure 16, the arrow shows the surface of the stomatocyst at high-resolution), SEM. Figures 17, 18, Stomatocysts of Form B, with a smooth surface, SEM. Scale bars: 5 μm." figureDoi="http://doi.org/10.5281/zenodo.14520140" httpUri="https://zenodo.org/record/14520140/files/figure.png" pageId="3" pageNumber="70">Figs. 10–18</figureCitation>
)
</paragraph>
<paragraph id="9B68A00EEA605638FF61E1EAFC974F2C" blockId="3.[136,1451,1990,2089]" pageId="3" pageNumber="70">
<emphasis id="A9A37C1CEA605638FF61E1EAFE534F01" bold="true" box="[189,402,2026,2052]" pageId="3" pageNumber="70">Biological affinity</emphasis>
: When examining samples on these cysts, plate-scales of
<taxonomicName id="5CD7DB8DEA605638FBFEE1EBFAAC4F00" authorityName="Popovskaya" authorityYear="1971" box="[1058,1389,2027,2053]" class="Chrysophyceae" family="Paraphysomonadaceae" genus="Chrysosphaerella" kingdom="Chromista" order="Synurales" pageId="3" pageNumber="70" phylum="Ochrophyta" rank="species" species="baikalensis">
<emphasis id="A9A37C1CEA605638FBFEE1EBFAAC4F00" box="[1058,1389,2027,2053]" italics="true" pageId="3" pageNumber="70">Chrysosphaerella baikalensis</emphasis>
</taxonomicName>
were often found, so we attribute the new morphotype to this species.
</paragraph>
<caption id="CFA8F086EA67563FFF54E4F7FA094414" box="[136,1480,759,785]" pageId="4" pageNumber="71" startId="4.[136,226,759,785]" targetBox="[144,2053,811,1497]" targetIsTable="true" targetPageId="4" targetType="table">
<paragraph id="9B68A00EEA67563FFF54E4F7FA094414" blockId="4.[136,1480,759,785]" box="[136,1480,759,785]" pageId="4" pageNumber="71">
<emphasis id="A9A37C1CEA67563FFF54E4F7FF3C4414" bold="true" box="[136,253,759,785]" pageId="4" pageNumber="71">ТABLE 1.</emphasis>
Morphometrical comparison of the structure of
<taxonomicName id="5CD7DB8DEA67563FFCDCE4F7FC7C4414" authorityName="Lauterborn" authorityYear="1896" box="[768,957,759,785]" class="Chrysophyceae" family="Paraphysomonadaceae" genus="Chrysosphaerella" kingdom="Chromista" order="Synurales" pageId="4" pageNumber="71" phylum="Ochrophyta" rank="genus">
<emphasis id="A9A37C1CEA67563FFCDCE4F7FC7C4414" box="[768,957,759,785]" italics="true" pageId="4" pageNumber="71">Chrysosphaerella</emphasis>
</taxonomicName>
stomatocysts based on this study and references.
</paragraph>
</caption>
<paragraph id="9B68A00EEA67563FFF4CE53DF93F42C2" pageId="4" pageNumber="71">
<table id="E9D752AEEA67A9C4FF4CE52BF7C442DC" box="[144,2053,811,1497]" gridcols="6" gridrows="8" pageId="4" pageNumber="71">
<tr id="25E7A24CEA67A9C4FF4CE52BF7C44463" box="[144,2053,811,870]" gridrow="0" pageId="4" pageNumber="71">
<th id="6636CB30EA67A9C4FF4CE52BFE4B4463" box="[144,394,811,870]" gridcol="0" gridrow="0" pageId="4" pageNumber="71">SEM description</th>
<th id="6636CB30EA67A9C4FE74E52BFD2B4463" box="[424,746,811,870]" gridcol="1" gridrow="0" pageId="4" pageNumber="71">
Stomatocyst 15, Duff &amp; Smoll 1988 (
<bibRefCitation id="FF46DDFFEA67563FFE38E54FFDBE4463" author="Duff, K. E. &amp; Zeeb, B. A. &amp; Smol, J. P." box="[484,639,847,870]" pageId="4" pageNumber="71" refId="ref3975" refString="Duff, K. E., Zeeb, B. A. &amp; Smol, J. P. (1995) Altas of Chrysophycean Cysts. Kluwer Academic Publishers, Dordrecht, 189 pp. https: // doi. org / 10.1007 / 978 - 94 - 017 - 0809 - 8" type="book" year="1995">
Duff
<emphasis id="A9A37C1CEA67563FFDC4E54FFD884463" box="[536,585,847,870]" italics="true" pageId="4" pageNumber="71">et al.</emphasis>
1995
</bibRefCitation>
)
</th>
<th id="6636CB30EA67A9C4FCD8E52BFBEE4463" box="[772,1071,811,870]" gridcol="2" gridrow="0" pageId="4" pageNumber="71">
Stomatocyst 42, Duff &amp; Smoll 1989 (
<bibRefCitation id="FF46DDFFEA67563FFC9CE54FFC1D4463" author="Duff, K. E. &amp; Zeeb, B. A. &amp; Smol, J. P." box="[832,988,847,870]" pageId="4" pageNumber="71" refId="ref3975" refString="Duff, K. E., Zeeb, B. A. &amp; Smol, J. P. (1995) Altas of Chrysophycean Cysts. Kluwer Academic Publishers, Dordrecht, 189 pp. https: // doi. org / 10.1007 / 978 - 94 - 017 - 0809 - 8" type="book" year="1995">
Duff
<emphasis id="A9A37C1CEA67563FFCA9E54FFC674463" box="[885,934,847,870]" italics="true" pageId="4" pageNumber="71">et al.</emphasis>
1995
</bibRefCitation>
)
</th>
<th id="6636CB30EA67A9C4FB88E52BFA404463" box="[1108,1409,811,870]" gridcol="3" gridrow="0" pageId="4" pageNumber="71">
Stomatocyst 49, Duff &amp; Smoll 1991 (
<bibRefCitation id="FF46DDFFEA67563FFB4CE54FFAED4463" author="Duff, K. E. &amp; Zeeb, B. A. &amp; Smol, J. P." box="[1168,1324,847,870]" pageId="4" pageNumber="71" refId="ref3975" refString="Duff, K. E., Zeeb, B. A. &amp; Smol, J. P. (1995) Altas of Chrysophycean Cysts. Kluwer Academic Publishers, Dordrecht, 189 pp. https: // doi. org / 10.1007 / 978 - 94 - 017 - 0809 - 8" type="book" year="1995">
Duff
<emphasis id="A9A37C1CEA67563FFB19E54FFB374463" box="[1221,1270,847,870]" italics="true" pageId="4" pageNumber="71">et al.</emphasis>
1995
</bibRefCitation>
)
</th>
<th id="6636CB30EA67A9C4FA4AE52BF9004463" box="[1430,1729,811,870]" gridcol="4" gridrow="0" pageId="4" pageNumber="71">
Stomatocyst 120, Duff &amp; Smoll 1992 (
<bibRefCitation id="FF46DDFFEA67563FF9CEE54FF96C4463" author="Duff, K. E. &amp; Zeeb, B. A. &amp; Smol, J. P." box="[1554,1709,847,870]" pageId="4" pageNumber="71" refId="ref3975" refString="Duff, K. E., Zeeb, B. A. &amp; Smol, J. P. (1995) Altas of Chrysophycean Cysts. Kluwer Academic Publishers, Dordrecht, 189 pp. https: // doi. org / 10.1007 / 978 - 94 - 017 - 0809 - 8" type="book" year="1995">
Duff
<emphasis id="A9A37C1CEA67563FF99AE54FF9B64463" box="[1606,1655,847,870]" italics="true" pageId="4" pageNumber="71">et al.</emphasis>
1995
</bibRefCitation>
)
</th>
<th id="6636CB30EA67A9C4F908E52BF7C44463" box="[1748,2053,811,870]" gridcol="5" gridrow="0" pageId="4" pageNumber="71">Stomatocyst 507, Forma B, this paper</th>
</tr>
<tr id="25E7A24CEA67A9C4FF4CE594F7C444AE" box="[144,2053,916,939]" gridrow="1" pageId="4" pageNumber="71">
<th id="6636CB30EA67A9C4FF4CE594FE4B44AE" box="[144,394,916,939]" gridcol="0" gridrow="1" pageId="4" pageNumber="71">Biological affinity</th>
<td id="6636CB30EA67A9C4FE74E594FD2B44AE" box="[424,746,916,939]" gridcol="1" gridrow="1" pageId="4" pageNumber="71">
<taxonomicName id="5CD7DB8DEA67563FFE74E594FDE944AE" authorityName="Korshikov" authorityYear="1941" box="[424,552,916,939]" class="Chrysophyceae" family="Paraphysomonadaceae" genus="Chrysosphaerella" kingdom="Chromista" order="Synurales" pageId="4" pageNumber="71" phylum="Ochrophyta" rank="species" species="brevispina">
<emphasis id="A9A37C1CEA67563FFE74E594FDE944AE" box="[424,552,916,939]" italics="true" pageId="4" pageNumber="71">C. brevispina</emphasis>
</taxonomicName>
</td>
<td id="6636CB30EA67A9C4FCD8E594FBEE44AE" box="[772,1071,916,939]" gridcol="2" gridrow="1" pageId="4" pageNumber="71">
Immature cyst of
<taxonomicName id="5CD7DB8DEA67563FFC72E594FBEE44AE" baseAuthorityName="Voloshko" baseAuthorityYear="2016" box="[942,1071,916,939]" class="Chrysophyceae" family="Paraphysomonadaceae" genus="Chrysosphaerella" kingdom="Chromista" order="Synurales" pageId="4" pageNumber="71" phylum="Ochrophyta" rank="species" species="longispina">
<emphasis id="A9A37C1CEA67563FFC72E594FBEE44AE" box="[942,1071,916,939]" italics="true" pageId="4" pageNumber="71">C. longispina</emphasis>
</taxonomicName>
</td>
<td id="6636CB30EA67A9C4FB88E594FA4044AE" box="[1108,1409,916,939]" gridcol="3" gridrow="1" pageId="4" pageNumber="71">
<taxonomicName id="5CD7DB8DEA67563FFB88E594FB1444AE" baseAuthorityName="Voloshko" baseAuthorityYear="2016" box="[1108,1237,916,939]" class="Chrysophyceae" family="Paraphysomonadaceae" genus="Chrysosphaerella" kingdom="Chromista" order="Synurales" pageId="4" pageNumber="71" phylum="Ochrophyta" rank="species" species="longispina">
<emphasis id="A9A37C1CEA67563FFB88E594FB1444AE" box="[1108,1237,916,939]" italics="true" pageId="4" pageNumber="71">C. longispina</emphasis>
</taxonomicName>
</td>
<td id="6636CB30EA67A9C4FA4AE594F90044AE" box="[1430,1729,916,939]" gridcol="4" gridrow="1" pageId="4" pageNumber="71">
Immature cyst of
<taxonomicName id="5CD7DB8DEA67563FF99CE594F90044AE" baseAuthorityName="Voloshko" baseAuthorityYear="2016" box="[1600,1729,916,939]" class="Chrysophyceae" family="Paraphysomonadaceae" genus="Chrysosphaerella" kingdom="Chromista" order="Synurales" pageId="4" pageNumber="71" phylum="Ochrophyta" rank="species" species="longispina">
<emphasis id="A9A37C1CEA67563FF99CE594F90044AE" box="[1600,1729,916,939]" italics="true" pageId="4" pageNumber="71">C. longispina</emphasis>
</taxonomicName>
</td>
<td id="6636CB30EA67A9C4F908E594F7C444AE" box="[1748,2053,916,939]" gridcol="5" gridrow="1" pageId="4" pageNumber="71">
<taxonomicName id="5CD7DB8DEA67563FF908E594F89D44AE" authorityName="Popovskaya" authorityYear="1971" box="[1748,1884,916,939]" class="Chrysophyceae" family="Paraphysomonadaceae" genus="Chrysosphaerella" kingdom="Chromista" order="Synurales" pageId="4" pageNumber="71" phylum="Ochrophyta" rank="species" species="baikalensis">
<emphasis id="A9A37C1CEA67563FF908E594F89D44AE" box="[1748,1884,916,939]" italics="true" pageId="4" pageNumber="71">C. baikalensis</emphasis>
</taxonomicName>
</td>
</tr>
<tr id="25E7A24CEA67A9C4FF4CE5D8F7C444EA" box="[144,2053,984,1007]" gridrow="2" pageId="4" pageNumber="71">
<th id="6636CB30EA67A9C4FF4CE5D8FE4B44EA" box="[144,394,984,1007]" gridcol="0" gridrow="2" pageId="4" pageNumber="71">Cyst shape</th>
<td id="6636CB30EA67A9C4FE74E5D8FD2B44EA" box="[424,746,984,1007]" gridcol="1" gridrow="2" pageId="4" pageNumber="71">Spherical</td>
<td id="6636CB30EA67A9C4FCD8E5D8FBEE44EA" box="[772,1071,984,1007]" gridcol="2" gridrow="2" pageId="4" pageNumber="71">Spherical or slightly oblate</td>
<td id="6636CB30EA67A9C4FB88E5D8FA4044EA" box="[1108,1409,984,1007]" gridcol="3" gridrow="2" pageId="4" pageNumber="71">Spherical or slightly oblate</td>
<td id="6636CB30EA67A9C4FA4AE5D8F90044EA" box="[1430,1729,984,1007]" gridcol="4" gridrow="2" pageId="4" pageNumber="71">Spherical</td>
<td id="6636CB30EA67A9C4F908E5D8F7C444EA" box="[1748,2053,984,1007]" gridcol="5" gridrow="2" pageId="4" pageNumber="71">Spherical or slightly oblate</td>
</tr>
<tr id="25E7A24CEA67A9C4FF4CE216F7C44354" box="[144,2053,1046,1105]" gridrow="3" pageId="4" pageNumber="71">
<th id="6636CB30EA67A9C4FF4CE216FE4B4354" box="[144,394,1046,1105]" gridcol="0" gridrow="3" pageId="4" pageNumber="71">Cyst diameter or diameter × height, µm</th>
<td id="6636CB30EA67A9C4FE74E216FD2B4354" box="[424,746,1046,1105]" gridcol="1" gridrow="3" pageId="4" pageNumber="71">≥ 9</td>
<td id="6636CB30EA67A9C4FCD8E216FBEE4354" box="[772,1071,1046,1105]" gridcol="2" gridrow="3" pageId="4" pageNumber="71">9.0–19.0</td>
<td id="6636CB30EA67A9C4FB88E216FA404354" box="[1108,1409,1046,1105]" gridcol="3" gridrow="3" pageId="4" pageNumber="71">6.8–10.2</td>
<td id="6636CB30EA67A9C4FA4AE216F9004354" box="[1430,1729,1046,1105]" gridcol="4" gridrow="3" pageId="4" pageNumber="71">6.0–8.9</td>
<td id="6636CB30EA67A9C4F908E216F7C44354" box="[1748,2053,1046,1105]" gridcol="5" gridrow="3" pageId="4" pageNumber="71">10.8–13.5 12.5–13.5 × 10.8–12.2</td>
</tr>
<tr id="25E7A24CEA67A9C4FF4CE278F7C443B6" box="[144,2053,1144,1203]" gridrow="4" pageId="4" pageNumber="71">
<th id="6636CB30EA67A9C4FF4CE278FE4B43B6" box="[144,394,1144,1203]" gridcol="0" gridrow="4" pageId="4" pageNumber="71">Pore diameter, µm</th>
<td id="6636CB30EA67A9C4FE74E278FD2B43B6" box="[424,746,1144,1203]" gridcol="1" gridrow="4" pageId="4" pageNumber="71">Pore is regular, diameter 1.0</td>
<td id="6636CB30EA67A9C4FCD8E278FBEE43B6" box="[772,1071,1144,1203]" gridcol="2" gridrow="4" pageId="4" pageNumber="71">Concave pore, inner diameter 0.3–2.1</td>
<td id="6636CB30EA67A9C4FB88E278FA4043B6" box="[1108,1409,1144,1203]" gridcol="3" gridrow="4" pageId="4" pageNumber="71">Concave pore, outer diameter 1.1–2.0, inner diameter 0.4–0.8</td>
<td id="6636CB30EA67A9C4FA4AE278F90043B6" box="[1430,1729,1144,1203]" gridcol="4" gridrow="4" pageId="4" pageNumber="71">Concave pore, inner diameter 0.5–0.9</td>
<td id="6636CB30EA67A9C4F908E278F7C443B6" box="[1748,2053,1144,1203]" gridcol="5" gridrow="4" pageId="4" pageNumber="71">Regular pore, diameter 0.2–0.3</td>
</tr>
<tr id="25E7A24CEA67A9C4FF4CE2DAF7C44210" box="[144,2053,1242,1301]" gridrow="5" pageId="4" pageNumber="71">
<th id="6636CB30EA67A9C4FF4CE2DAFE4B4210" box="[144,394,1242,1301]" gridcol="0" gridrow="5" pageId="4" pageNumber="71">Ornamentation</th>
<td id="6636CB30EA67A9C4FE74E2DAFD2B4210" box="[424,746,1242,1301]" gridcol="1" gridrow="5" pageId="4" pageNumber="71">Smooth or psilate (if immature of eroded)</td>
<td id="6636CB30EA67A9C4FCD8E2DAFBEE4210" box="[772,1071,1242,1301]" gridcol="2" gridrow="5" pageId="4" pageNumber="71">Smooth</td>
<td id="6636CB30EA67A9C4FB88E2DAFA404210" box="[1108,1409,1242,1301]" gridcol="3" gridrow="5" pageId="4" pageNumber="71">Smooth</td>
<td id="6636CB30EA67A9C4FA4AE2DAF9004210" box="[1430,1729,1242,1301]" gridcol="4" gridrow="5" pageId="4" pageNumber="71">Smooth or psilate surface</td>
<td id="6636CB30EA67A9C4F908E2DAF7C44210" box="[1748,2053,1242,1301]" gridcol="5" gridrow="5" pageId="4" pageNumber="71">Smooth or psilate surface</td>
</tr>
<tr id="25E7A24CEA67A9C4FF4CE33CF7C44272" box="[144,2053,1340,1399]" gridrow="6" pageId="4" pageNumber="71">
<th id="6636CB30EA67A9C4FF4CE33CFE4B4272" box="[144,394,1340,1399]" gridcol="0" gridrow="6" pageId="4" pageNumber="71">Pseudoannulus</th>
<td id="6636CB30EA67A9C4FE74E33CFD2B4272" box="[424,746,1340,1399]" gridcol="1" gridrow="6" pageId="4" pageNumber="71">Not available</td>
<td id="6636CB30EA67A9C4FCD8E33CFBEE4272" box="[772,1071,1340,1399]" gridcol="2" gridrow="6" pageId="4" pageNumber="71">Not available</td>
<td id="6636CB30EA67A9C4FB88E33CFA404272" box="[1108,1409,1340,1399]" gridcol="3" gridrow="6" pageId="4" pageNumber="71">Swollen pseudoannulus that appears planar in apical view</td>
<td id="6636CB30EA67A9C4FA4AE33CF9004272" box="[1430,1729,1340,1399]" gridcol="4" gridrow="6" pageId="4" pageNumber="71">Not available</td>
<td id="6636CB30EA67A9C4F908E33CF7C44272" box="[1748,2053,1340,1399]" gridcol="5" gridrow="6" pageId="4" pageNumber="71">Planar pseudoanulus 0.1–0.4 wide</td>
</tr>
<tr id="25E7A24CEA67A9C4FF4CE39EF7C442DC" box="[144,2053,1438,1497]" gridrow="7" pageId="4" pageNumber="71" rowspan-2="1" rowspan-3="1" rowspan-4="1">
<th id="6636CB30EA67A9C4FF4CE39EFE4B42DC" box="[144,394,1438,1497]" gridcol="0" gridrow="7" pageId="4" pageNumber="71">Pore diameter: cyst diameter ratio, µm</th>
<td id="6636CB30EA67A9C4FE74E39EFD2B42DC" box="[424,746,1438,1497]" gridcol="1" gridrow="7" pageId="4" pageNumber="71">0.1–0.13</td>
<td id="6636CB30EA67A9C4F908E39EF7C442DC" box="[1748,2053,1438,1497]" gridcol="5" gridrow="7" pageId="4" pageNumber="71">0.04</td>
</tr>
</table>
</paragraph>
<paragraph id="9B68A00EEA66563EFF61E69EFD0947BD" blockId="5.[136,1452,158,540]" box="[189,712,158,185]" pageId="5" pageNumber="72">
<emphasis id="A9A37C1CEA66563EFF61E69EFE4D47BD" bold="true" box="[189,396,158,184]" pageId="5" pageNumber="72">Negative number</emphasis>
:18851_Ch bay_stomat_014
</paragraph>
<paragraph id="9B68A00EEA66563EFF61E6C1FE7F47D9" blockId="5.[136,1452,158,540]" box="[189,446,193,220]" pageId="5" pageNumber="72">
<emphasis id="A9A37C1CEA66563EFF61E6C1FEE647DE" bold="true" box="[189,295,193,219]" pageId="5" pageNumber="72">Location</emphasis>
: Lake Baikal
</paragraph>
<paragraph id="9B68A00EEA66563EFF61E6E5FCE2466C" blockId="5.[136,1452,158,540]" pageId="5" pageNumber="72">
<emphasis id="A9A37C1CEA66563EFF61E6E5FE4B47FA" bold="true" box="[189,394,229,255]" pageId="5" pageNumber="72">SEM description</emphasis>
: The stomatocyst is spherical, with a diameter ranging from 10.8 to 13.5 μm, and may be slightly oblate, measuring 12.5–13.5 × 10.8–12.2 μm. It lacks a collar. The pore is regular, measuring 0.2–0.3 μm in diameter, located in a depression that is 1.4–1.7 μm in diameter and 0.2–0.4 μm deep. This pore is encircled by an asymmetric, planar pseudoannulus that is 0.1–0.4 μm wide.
</paragraph>
<paragraph id="9B68A00EEA66563EFF61E774FB124688" blockId="5.[136,1452,158,540]" box="[189,1235,371,398]" pageId="5" pageNumber="72">We identified two morphotypes of stomatocysts in a single sample of this species, as follows.</paragraph>
<paragraph id="9B68A00EEA66563EFF61E797FD6846D1" blockId="5.[136,1452,158,540]" pageId="5" pageNumber="72">
<emphasis id="A9A37C1CEA66563EFF61E797FEE646B5" bold="true" box="[189,295,406,433]" pageId="5" pageNumber="72">Forma A</emphasis>
: The surface of this stomatocyst is densely covered with short, needle-like outgrowths. We hypothesize that this
<taxonomicName id="5CD7DB8DEA66563EFF35E7BAFE5946D1" box="[233,408,442,468]" form="represents" pageId="5" pageNumber="72" rank="form">form represents</taxonomicName>
immature stomatocysts.
</paragraph>
<paragraph id="9B68A00EEA66563EFF61E7DEFC0546F2" blockId="5.[136,1452,158,540]" box="[189,964,477,504]" pageId="5" pageNumber="72">
<emphasis id="A9A37C1CEA66563EFF61E7DEFEE946FD" bold="true" box="[189,296,478,504]" pageId="5" pageNumber="72">Forma B</emphasis>
: The surface of this stomatocyst is either smooth or psilate.
</paragraph>
<paragraph id="9B68A00EEA66563EFF61E401FA42451E" blockId="5.[136,1452,158,540]" box="[189,1411,513,540]" pageId="5" pageNumber="72">
<emphasis id="A9A37C1CEA66563EFF61E401FEDD451E" bold="true" box="[189,284,513,539]" pageId="5" pageNumber="72">Ecology</emphasis>
: Both morphotypes were found during the open water period in June at a temperature of 3.9–4.5 °С.
</paragraph>
</subSubSection>
</treatment>
</document>