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<document id="D420CE2431D7F32850C5452082742248" ID-DOI="10.11646/phytotaxa.148.1.3" ID-ISSN="1179-3163" ID-Zenodo-Dep="5100395" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1626237351907" checkinUser="felipe" docAuthor="Rioual, Patrick, Gao, Qiang, Peng, Yumei &amp; Chu, Guoqiang" docDate="2013" docId="284587CB826BFF8A6CD2F8AA9F46FDC4" docLanguage="en" docName="Phytotaxa.148.1.47-56.pdf" docOrigin="Phytotaxa 148 (1)" docSource="https://www.mendeley.com/catalogue/aaf3c6ca-1cf5-39ea-9964-34811f96919a/" docStyle="DocumentStyle:13F189B31CB4CCCE9197361A4E100104.3:Phytotaxa.2011-2013.journal_article" docStyleId="13F189B31CB4CCCE9197361A4E100104" docStyleName="Phytotaxa.2011-2013.journal_article" docStyleVersion="3" docTitle="Stauroneis lacusvulcani Rioual &amp; Gao &amp; Peng &amp; Chu 2013, sp. nov." docType="treatment" docVersion="3" lastPageNumber="52" masterDocId="D47CFFB38269FF8F6C45FF9B9C5AFF9F" masterDocTitle="Stauroneis lacusvulcani sp. nov. (Bacillariophyceae), a new diatom from volcanic lakes in northeastern China" masterLastPageNumber="56" masterPageNumber="47" pageNumber="49" updateTime="1699006084242" updateUser="plazi" zenodo-license-document="CLOSED">
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<mods:title id="DE6F5743240933071DE887BA0F4C7C4A">Stauroneis lacusvulcani sp. nov. (Bacillariophyceae), a new diatom from volcanic lakes in northeastern China</mods:title>
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<mods:affiliation id="F0914D07795C91D6AC1EA298B88742E5">Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, # 19 Beitucheng Xilu, P. O. box 9825, Beijing 100029, China * E-mail: prioual @ mail. igcas. ac. cn (Corresponding author).</mods:affiliation>
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<mods:namePart id="186F2946484BA56BD648F47B3FA411C3">Gao, Qiang</mods:namePart>
<mods:affiliation id="F296F4F92071302BA98BE41CCB55F275">Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, # 19 Beitucheng Xilu, P. O. box 9825, Beijing 100029, China * E-mail: prioual @ mail. igcas. ac. cn (Corresponding author).</mods:affiliation>
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<taxonomicName id="67EC4D5E826BFF8D6CD2F8AA9E52F8D3" authority="Rioual" authorityName="Rioual &amp; Gao &amp; Peng &amp; Chu" authorityYear="2013" box="[151,520,1841,1868]" class="Bacillariophyceae" family="Stauroneidaceae" genus="Stauroneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="2" pageNumber="49" phylum="Bacillariophyta" rank="species" species="lacusvulcani" status="sp. nov.">
<emphasis id="9298EACF826BFF8D6CD2F8AA9DEEF8D4" bold="true" box="[151,436,1841,1867]" italics="true" pageId="2" pageNumber="49">Stauroneis lacusvulcani</emphasis>
Rioual
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<taxonomicNameLabel id="89AB57B4826BFF8D6E4BF8A99E3DF8D3" box="[526,615,1842,1868]" pageId="2" pageNumber="49" rank="species">sp. nov.</taxonomicNameLabel>
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(
<figureCitation id="38D72A58826BFF8D6E33F8A99EB1F8D3" box="[630,747,1842,1868]" captionStart-0="FIGURES 215" captionStart-1="FIGURES 1621" captionStartId-0="3.[151,259,1885,1907]" captionStartId-1="4.[151,258,1940,1962]" captionTargetBox-0="[329,1257,197,1853]" captionTargetBox-1="[233,1354,603,1923]" captionTargetId-0="figure-60@3.[329,1257,197,1865]" captionTargetId-1="figure-245@4.[233,1354,603,1926]" captionTargetPageId-0="3" captionTargetPageId-1="4" captionText-0="FIGURES 215. Light micro-photographs of Stauroneis lacusvulcani. Scale bar = 10 µm. Figs 3,4,7,8. Specimen from Sifangshan Tianchi, surface-sediment. Figs 2, 5, 6. Specimens from Xialongwan surface-sediment. Figs 915. Specimens from Xiaolongwan core sample." captionText-1="FIGURES 1621. SEM of Stauroneis lacusvulcani from Sifangshan. 16. Exterior view of whole valve. 17. Close-up of valve centre. 18. Close-up of distal end. 19. Interior view of whole valve. 20. Interior view of centre showing ridge bearing raphe fissure. 21. Interior view of distal end showing helictoglossa." figureDoi-0="http://doi.org/10.5281/zenodo.5100399" figureDoi-1="http://doi.org/10.5281/zenodo.5100401" httpUri-0="https://zenodo.org/record/5100399/files/figure.png" httpUri-1="https://zenodo.org/record/5100401/files/figure.png" pageId="2" pageNumber="49">Figs 221</figureCitation>
)
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<emphasis id="9298EACF826BFF8D6CD2F8E49C95F809" bold="true" box="[151,207,1919,1942]" pageId="2" pageNumber="49">Type</emphasis>
:—
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:
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,
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,
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<elevation id="2BC1D1EE826BFF8D685CF8E4983AF809" box="[1049,1120,1919,1942]" metricMagnitude="2" metricUnit="m" metricValue="8.69" pageId="2" pageNumber="49" unit="m" value="869.0">869 m</elevation>
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<collectingDate id="C416E9F5826BFF8D6C82F8049D1AF829" box="[199,320,1951,1974]" pageId="2" pageNumber="49" value="2008-04">April-2008</collectingDate>
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, surface sediment collected by
<collectorName id="0D19530B826BFF8D6EC9F8049F16F829" box="[652,844,1951,1974]" pageId="2" pageNumber="49">Dr Guoqiang Chu</collectorName>
, IGG-CAS
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,
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<collectingRegion id="6228F83F826BFF8D6F95F8049878F829" box="[976,1058,1951,1974]" country="China" name="Beijing" pageId="2" pageNumber="49">Beijing</collectingRegion>
. (
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slide IGGDC-DB-SIFA- 1204!,
<typeStatus id="7F57887F826BFF8D6D57F8249D35F849" box="[274,367,1983,2006]" pageId="2" pageNumber="49" type="holotype">holotype</typeStatus>
specimen illustrated in
<figureCitation id="38D72A58826BFF8D6E2BF8249EFDF849" box="[622,679,1983,2006]" captionStart="FIGURES 215" captionStartId="3.[151,259,1885,1907]" captionTargetBox="[329,1257,197,1853]" captionTargetId="figure-60@3.[329,1257,197,1865]" captionTargetPageId="3" captionText="FIGURES 215. Light micro-photographs of Stauroneis lacusvulcani. Scale bar = 10 µm. Figs 3,4,7,8. Specimen from Sifangshan Tianchi, surface-sediment. Figs 2, 5, 6. Specimens from Xialongwan surface-sediment. Figs 915. Specimens from Xiaolongwan core sample." figureDoi="http://doi.org/10.5281/zenodo.5100399" httpUri="https://zenodo.org/record/5100399/files/figure.png" pageId="2" pageNumber="49">Fig 7</figureCitation>
, located using
<collectorName id="0D19530B826BFF8D6F02F8249853F849" box="[839,1033,1983,2006]" pageId="2" pageNumber="49">England Finder K</collectorName>
45/1);
<specimenCode id="F04A9EA6826BFF8D6809F82498FFF849" box="[1100,1189,1983,2006]" collectionCode="BM" country="United Kingdom" name="Bristol Museum" pageId="2" pageNumber="49">BM 101</specimenCode>
674 (isotype slide)
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.
</paragraph>
<caption id="F4936655826AFF8C6CD2F8C69CB8F827" ID-DOI="http://doi.org/10.5281/zenodo.5100399" ID-Zenodo-Dep="5100399" httpUri="https://zenodo.org/record/5100399/files/figure.png" pageId="3" pageNumber="50" startId="3.[151,259,1885,1907]" targetBox="[329,1257,197,1853]" targetPageId="3">
<paragraph id="A05336DD826AFF8C6CD2F8C69CB8F827" blockId="3.[151,1436,1885,1976]" pageId="3" pageNumber="50">
<emphasis id="9298EACF826AFF8C6CD2F8C69D60F8EC" bold="true" box="[151,314,1885,1907]" pageId="3" pageNumber="50">FIGURES 215</emphasis>
. Light micro-photographs of
<taxonomicName id="67EC4D5E826AFF8C6E19F8C69F1EF8ED" authorityName="Rioual &amp; Gao &amp; Peng &amp; Chu" authorityYear="2013" box="[604,836,1885,1906]" class="Bacillariophyceae" family="Stauroneidaceae" genus="Stauroneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="3" pageNumber="50" phylum="Bacillariophyta" rank="species" species="lacusvulcani">
<emphasis id="9298EACF826AFF8C6E19F8C69F1EF8ED" box="[604,836,1885,1906]" italics="true" pageId="3" pageNumber="50">Stauroneis lacusvulcani</emphasis>
</taxonomicName>
. Scale bar = 10 µm. Figs 3,4,7,8. Specimen from Sifangshan Tianchi, surface-sediment. Figs 2, 5, 6. Specimens from Xialongwan surface-sediment. Figs 915. Specimens from Xiaolongwan core sample.
</paragraph>
</caption>
<paragraph id="A05336DD826DFF8B6CD2FF0398B9FEEC" blockId="4.[151,1436,152,564]" pageId="4" pageNumber="51">
LM (
<figureCitation id="38D72A58826DFF8B6C96FF039D15FF2D" box="[211,335,152,178]" captionStart="FIGURES 215" captionStartId="3.[151,259,1885,1907]" captionTargetBox="[329,1257,197,1853]" captionTargetId="figure-60@3.[329,1257,197,1865]" captionTargetPageId="3" captionText="FIGURES 215. Light micro-photographs of Stauroneis lacusvulcani. Scale bar = 10 µm. Figs 3,4,7,8. Specimen from Sifangshan Tianchi, surface-sediment. Figs 2, 5, 6. Specimens from Xialongwan surface-sediment. Figs 915. Specimens from Xiaolongwan core sample." figureDoi="http://doi.org/10.5281/zenodo.5100399" httpUri="https://zenodo.org/record/5100399/files/figure.png" pageId="4" pageNumber="51">Figs 215</figureCitation>
): Valves lanceolate with long protracted capitate apices (
<figureCitation id="38D72A58826DFF8B6FAAFF039830FF2D" box="[1007,1130,152,178]" captionStart="FIGURES 215" captionStartId="3.[151,259,1885,1907]" captionTargetBox="[329,1257,197,1853]" captionTargetId="figure-60@3.[329,1257,197,1865]" captionTargetPageId="3" captionText="FIGURES 215. Light micro-photographs of Stauroneis lacusvulcani. Scale bar = 10 µm. Figs 3,4,7,8. Specimen from Sifangshan Tianchi, surface-sediment. Figs 2, 5, 6. Specimens from Xialongwan surface-sediment. Figs 915. Specimens from Xiaolongwan core sample." figureDoi="http://doi.org/10.5281/zenodo.5100399" httpUri="https://zenodo.org/record/5100399/files/figure.png" pageId="4" pageNumber="51">Figs 215</figureCitation>
); length
<quantity id="67149B38826DFF8B6894FF039916FF2D" box="[1233,1356,152,178]" metricMagnitude="-2" metricUnit="m" metricValue="7.25" metricValueMax="8.3" metricValueMin="6.2" pageId="4" pageNumber="51" unit="mm" value="72.5" valueMax="83.0" valueMin="62.0">6283 µm</quantity>
, width 9.212.0 µ m. Raphe moderately lateral, becoming filiform at distal ends, with strongly unilaterally deflected (hooked) distal ends. Axial area narrow, linear. Shape of central area varies from narrow rectangular (
<figureCitation id="38D72A58826DFF8B6906FF7E9D61FEB9" captionStart="FIGURES 215" captionStartId="3.[151,259,1885,1907]" captionTargetBox="[329,1257,197,1853]" captionTargetId="figure-60@3.[329,1257,197,1865]" captionTargetPageId="3" captionText="FIGURES 215. Light micro-photographs of Stauroneis lacusvulcani. Scale bar = 10 µm. Figs 3,4,7,8. Specimen from Sifangshan Tianchi, surface-sediment. Figs 2, 5, 6. Specimens from Xialongwan surface-sediment. Figs 915. Specimens from Xiaolongwan core sample." figureDoi="http://doi.org/10.5281/zenodo.5100399" httpUri="https://zenodo.org/record/5100399/files/figure.png" pageId="4" pageNumber="51">Figs 2 3, 56, 1013</figureCitation>
) to asymmetrical stauros expanding towards valve margins (
<figureCitation id="38D72A58826DFF8B6848FE979802FEB9" box="[1037,1112,268,294]" captionStart="FIGURE 1" captionStartId="2.[151,244,1049,1071]" captionTargetBox="[305,1283,201,1017]" captionTargetId="figure-251@2.[304,1284,197,1025]" captionTargetPageId="2" captionText="FIGURE 1: Geographical location of the study sites. Lake Xiaolongwan is marked by an X, Sifangshan Tianchi by a S. Shaded areas represent mountainous regions with an elevation&gt;1000 m." figureDoi="http://doi.org/10.5281/zenodo.5100397" httpUri="https://zenodo.org/record/5100397/files/figure.png" pageId="4" pageNumber="51">Figs 1</figureCitation>
,
<figureCitation id="38D72A58826DFF8B682DFE979955FEB9" box="[1128,1295,268,294]" captionStart="FIGURES 215" captionStartId="3.[151,259,1885,1907]" captionTargetBox="[329,1257,197,1853]" captionTargetId="figure-60@3.[329,1257,197,1865]" captionTargetPageId="3" captionText="FIGURES 215. Light micro-photographs of Stauroneis lacusvulcani. Scale bar = 10 µm. Figs 3,4,7,8. Specimen from Sifangshan Tianchi, surface-sediment. Figs 2, 5, 6. Specimens from Xialongwan surface-sediment. Figs 915. Specimens from Xiaolongwan core sample." figureDoi="http://doi.org/10.5281/zenodo.5100399" httpUri="https://zenodo.org/record/5100399/files/figure.png" pageId="4" pageNumber="51">4, 79, 1415</figureCitation>
). Shortened striae may be present at valve margins (
<figureCitation id="38D72A58826DFF8B6E3AFEA99F02FED3" box="[639,856,306,332]" captionStart="FIGURES 215" captionStartId="3.[151,259,1885,1907]" captionTargetBox="[329,1257,197,1853]" captionTargetId="figure-60@3.[329,1257,197,1865]" captionTargetPageId="3" captionText="FIGURES 215. Light micro-photographs of Stauroneis lacusvulcani. Scale bar = 10 µm. Figs 3,4,7,8. Specimen from Sifangshan Tianchi, surface-sediment. Figs 2, 5, 6. Specimens from Xialongwan surface-sediment. Figs 915. Specimens from Xiaolongwan core sample." figureDoi="http://doi.org/10.5281/zenodo.5100399" httpUri="https://zenodo.org/record/5100399/files/figure.png" pageId="4" pageNumber="51">Figs 2, 58, 912</figureCitation>
) or not (
<figureCitation id="38D72A58826DFF8B6F86FEA998D5FED3" box="[963,1167,306,332]" captionStart="FIGURES 215" captionStartId="3.[151,259,1885,1907]" captionTargetBox="[329,1257,197,1853]" captionTargetId="figure-60@3.[329,1257,197,1865]" captionTargetPageId="3" captionText="FIGURES 215. Light micro-photographs of Stauroneis lacusvulcani. Scale bar = 10 µm. Figs 3,4,7,8. Specimen from Sifangshan Tianchi, surface-sediment. Figs 2, 5, 6. Specimens from Xialongwan surface-sediment. Figs 915. Specimens from Xiaolongwan core sample." figureDoi="http://doi.org/10.5281/zenodo.5100399" httpUri="https://zenodo.org/record/5100399/files/figure.png" pageId="4" pageNumber="51">Figs 34, 1315</figureCitation>
). Striae parallel along border of stauros becoming radiate to more steeply radiate near valve apices,
<quantity id="67149B38826DFF8B6867FEC298D2FEEC" box="[1058,1160,345,371]" metricMagnitude="-1" metricUnit="m" metricValue="6.223" metricValueMax="7.112" metricValueMin="5.334" pageId="4" pageNumber="51" unit="in" value="24.5" valueMax="28.0" valueMin="21.0">2128 in</quantity>
<quantity id="67149B38826DFF8B68CAFEC29885FEEC" box="[1167,1247,345,371]" metricMagnitude="-2" metricUnit="m" metricValue="1.0" pageId="4" pageNumber="51" unit="mm" value="10.0">10 µm</quantity>
.
</paragraph>
<paragraph id="A05336DD826DFF8B6C83FE1B9F3DFDAB" blockId="4.[151,1436,152,564]" pageId="4" pageNumber="51">
SEM (
<figureCitation id="38D72A58826DFF8B6D51FE1B9DC5FE05" box="[276,415,384,410]" captionStart="FIGURES 1621" captionStartId="4.[151,258,1940,1962]" captionTargetBox="[233,1354,603,1923]" captionTargetId="figure-245@4.[233,1354,603,1926]" captionTargetPageId="4" captionText="FIGURES 1621. SEM of Stauroneis lacusvulcani from Sifangshan. 16. Exterior view of whole valve. 17. Close-up of valve centre. 18. Close-up of distal end. 19. Interior view of whole valve. 20. Interior view of centre showing ridge bearing raphe fissure. 21. Interior view of distal end showing helictoglossa." figureDoi="http://doi.org/10.5281/zenodo.5100401" httpUri="https://zenodo.org/record/5100401/files/figure.png" pageId="4" pageNumber="51">Figs 1621</figureCitation>
): Areolae round to transapically oblong, irregularly spaced,
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<quantity id="67149B38826DFF8B68A1FE1B996FFE05" box="[1252,1333,384,410]" metricMagnitude="-2" metricUnit="m" metricValue="1.0" pageId="4" pageNumber="51" unit="mm" value="10.0">10 µm</quantity>
. Weakly developed hyaline area present, thus striae next to stauros appear discontinuous (
<figureCitation id="38D72A58826DFF8B6800FE3D9897FE5F" box="[1093,1229,422,448]" captionStart="FIGURES 1621" captionStartId="4.[151,258,1940,1962]" captionTargetBox="[233,1354,603,1923]" captionTargetId="figure-245@4.[233,1354,603,1926]" captionTargetPageId="4" captionText="FIGURES 1621. SEM of Stauroneis lacusvulcani from Sifangshan. 16. Exterior view of whole valve. 17. Close-up of valve centre. 18. Close-up of distal end. 19. Interior view of whole valve. 20. Interior view of centre showing ridge bearing raphe fissure. 21. Interior view of distal end showing helictoglossa." figureDoi="http://doi.org/10.5281/zenodo.5100401" httpUri="https://zenodo.org/record/5100401/files/figure.png" pageId="4" pageNumber="51">Figs 17, 20</figureCitation>
). Raphe bordered by wide sternum on each side. Proximal raphe ends straight and slightly expanded (
<figureCitation id="38D72A58826DFF8B683BFE56988CFE78" box="[1150,1238,461,487]" captionStart="FIGURES 1621" captionStartId="4.[151,258,1940,1962]" captionTargetBox="[233,1354,603,1923]" captionTargetId="figure-245@4.[233,1354,603,1926]" captionTargetPageId="4" captionText="FIGURES 1621. SEM of Stauroneis lacusvulcani from Sifangshan. 16. Exterior view of whole valve. 17. Close-up of valve centre. 18. Close-up of distal end. 19. Interior view of whole valve. 20. Interior view of centre showing ridge bearing raphe fissure. 21. Interior view of distal end showing helictoglossa." figureDoi="http://doi.org/10.5281/zenodo.5100401" httpUri="https://zenodo.org/record/5100401/files/figure.png" pageId="4" pageNumber="51">Fig. 17</figureCitation>
), apical external raphe endings hooked with hooks opening toward secondary side (
<figureCitation id="38D72A58826DFF8B6FF2FE6F984BFD91" box="[951,1041,500,526]" captionStart="FIGURES 1621" captionStartId="4.[151,258,1940,1962]" captionTargetBox="[233,1354,603,1923]" captionTargetId="figure-245@4.[233,1354,603,1926]" captionTargetPageId="4" captionText="FIGURES 1621. SEM of Stauroneis lacusvulcani from Sifangshan. 16. Exterior view of whole valve. 17. Close-up of valve centre. 18. Close-up of distal end. 19. Interior view of whole valve. 20. Interior view of centre showing ridge bearing raphe fissure. 21. Interior view of distal end showing helictoglossa." figureDoi="http://doi.org/10.5281/zenodo.5100401" httpUri="https://zenodo.org/record/5100401/files/figure.png" pageId="4" pageNumber="51">Fig. 18</figureCitation>
). Internally, raphe-sternum bears longitudinal ribs and well-developed helictoglossae (
<figureCitation id="38D72A58826DFF8B6F47FD819F00FDAB" box="[770,858,538,564]" captionStart="FIGURES 1621" captionStartId="4.[151,258,1940,1962]" captionTargetBox="[233,1354,603,1923]" captionTargetId="figure-245@4.[233,1354,603,1926]" captionTargetPageId="4" captionText="FIGURES 1621. SEM of Stauroneis lacusvulcani from Sifangshan. 16. Exterior view of whole valve. 17. Close-up of valve centre. 18. Close-up of distal end. 19. Interior view of whole valve. 20. Interior view of centre showing ridge bearing raphe fissure. 21. Interior view of distal end showing helictoglossa." figureDoi="http://doi.org/10.5281/zenodo.5100401" httpUri="https://zenodo.org/record/5100401/files/figure.png" pageId="4" pageNumber="51">Fig. 21</figureCitation>
).
</paragraph>
</subSubSection>
<caption id="F4936655826DFF8B6CD2F80F9E28F86E" ID-DOI="http://doi.org/10.5281/zenodo.5100401" ID-Zenodo-Dep="5100401" httpUri="https://zenodo.org/record/5100401/files/figure.png" pageId="4" pageNumber="51" startId="4.[151,258,1940,1962]" targetBox="[233,1354,603,1923]" targetPageId="4">
<paragraph id="A05336DD826DFF8B6CD2F80F9E28F86E" blockId="4.[151,1437,1939,2033]" pageId="4" pageNumber="51">
<emphasis id="9298EACF826DFF8B6CD2F80F9D1FF835" bold="true" box="[151,325,1939,1962]" pageId="4" pageNumber="51">FIGURES 1621</emphasis>
. SEM of
<taxonomicName id="67EC4D5E826DFF8B6DE1F80F9ED2F836" authorityName="Rioual &amp; Gao &amp; Peng &amp; Chu" authorityYear="2013" box="[420,648,1940,1961]" class="Bacillariophyceae" family="Stauroneidaceae" genus="Stauroneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="4" pageNumber="51" phylum="Bacillariophyta" rank="species" species="lacusvulcani">
<emphasis id="9298EACF826DFF8B6DE1F80F9ED2F836" box="[420,648,1940,1961]" italics="true" pageId="4" pageNumber="51">Stauroneis lacusvulcani</emphasis>
</taxonomicName>
from Sifangshan. 16. Exterior view of whole valve. 17. Close-up of valve centre. 18. Close-up of distal end. 19. Interior view of whole valve. 20. Interior view of centre showing ridge bearing raphe fissure. 21. Interior view of distal end showing helictoglossa.
</paragraph>
</caption>
<subSubSection id="E8F66556826CFF8A6C83FF039F07FF2D" box="[198,861,152,178]" pageId="5" pageNumber="52" type="etymology">
<paragraph id="A05336DD826CFF8A6C83FF039F07FF2D" blockId="5.[151,1436,152,603]" box="[198,861,152,178]" pageId="5" pageNumber="52">
<emphasis id="9298EACF826CFF8A6C83FF039D17FF2D" bold="true" box="[198,333,152,178]" pageId="5" pageNumber="52">Etymology</emphasis>
:—Based on its occurrence in volcanic lakes.
</paragraph>
</subSubSection>
<subSubSection id="E8F66556826CFF8A6C83FF259F46FDC4" pageId="5" pageNumber="52" type="distribution">
<paragraph id="A05336DD826CFF8A6C83FF25993EFE78" blockId="5.[151,1436,152,603]" pageId="5" pageNumber="52">
<emphasis id="9298EACF826CFF8A6C83FF259DA1FF47" bold="true" box="[198,507,190,216]" pageId="5" pageNumber="52">Distribution and ecology</emphasis>
:—
<taxonomicName id="67EC4D5E826CFF8A6E65FF259F6EFF47" authorityName="Rioual &amp; Gao &amp; Peng &amp; Chu" authorityYear="2013" box="[544,820,190,216]" class="Bacillariophyceae" family="Stauroneidaceae" genus="Stauroneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="5" pageNumber="52" phylum="Bacillariophyta" rank="species" species="lacusvulcani">
<emphasis id="9298EACF826CFF8A6E65FF259F6EFF47" box="[544,820,190,216]" italics="true" pageId="5" pageNumber="52">Stauroneis lacusvulcani</emphasis>
</taxonomicName>
was found in the surface sediment of two volcanic lakes of NE
<collectingCountry id="D8FB764D826CFF8A6D6FFF7E9D28FF60" box="[298,370,229,255]" name="China" pageId="5" pageNumber="52">China</collectingCountry>
, Sifangshan Tianchi and Lake Xiaolongwan. Lake Xiaolongwan located in the Long Gang volcanic field in
<collectingRegion id="6228F83F826CFF8A6D2CFE979E4DFEB9" box="[361,535,268,294]" country="China" name="Jilin" pageId="5" pageNumber="52">Jilin Province</collectingRegion>
, is a small maar lake (i.e. formed by a phreatomagmatic eruption) with a maximum water depth of
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(
<bibRefCitation id="C47D4B2C826CFF8A6E48FEA99E9DFED3" author="Chu, G. &amp; Sun, Q. &amp; Gu, Z. &amp; Rioual, P. &amp; Liu, Q. &amp; Wang, K. &amp; Han, J. &amp; Liu, J." box="[525,711,306,332]" pageId="5" pageNumber="52" pagination="108 - 118" refId="ref3976" refString="Chu, G., Sun, Q., Gu, Z., Rioual, P., Liu, Q., Wang, K., Han, J. &amp; Liu, J. (2009) Dust records from varved lacustrine sediments of two neighboring lakes in northeastern China over the last 1400 years. Quaternary International 194: 108 - 118. http: // dx. doi. org / 10.1016 / j. quaint. 2008.08.005" type="journal article" year="2009">
Chu
<emphasis id="9298EACF826CFF8A6E02FEA99E23FED3" box="[583,633,306,332]" italics="true" pageId="5" pageNumber="52">et al</emphasis>
. 2009
</bibRefCitation>
). Sifangshan Tianchi, located in the Great XingAn Mountains (
<collectingRegion id="6228F83F826CFF8A6CDBFEC29D0CFEEC" box="[158,342,345,371]" country="China" name="Nei Mongol" pageId="5" pageNumber="52">Inner Mongolia</collectingRegion>
) is a much smaller water body as only a small pond, less than
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deep, persists at the center of the crater. In both sites, the water is slightly acidic with low electrical conductivity and relatively high dissolved organic carbon concentration (
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). For Sifangshan, however, the values for total phosphorus (TP), total nitrogen (TN) and dissolved silica were measured on a water sample that was contaminated with sediment.
</paragraph>
<paragraph id="A05336DD826CFF8A6C83FE6F9F46FDC4" blockId="5.[151,1436,152,603]" pageId="5" pageNumber="52">
In both surface-sediment samples,
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<emphasis id="9298EACF826CFF8A6E1AFE6F9F4BFD91" box="[607,785,500,526]" italics="true" pageId="5" pageNumber="52">S. lacusvulcani</emphasis>
</taxonomicName>
is rare and represents less than 1% of the assemblages. In the sediment core from Lake Xiaolongwan,
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<emphasis id="9298EACF826CFF8A6EF3FD819F3DFDAB" box="[694,871,538,564]" italics="true" pageId="5" pageNumber="52">S. lacusvulcani</emphasis>
</taxonomicName>
is most abundant (14.4%) in the sample taken at
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core depth from the early part of the Holocene.
</paragraph>
</subSubSection>
</treatment>
</document>