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<document id="867A0760FC8F379C04A8A1EE36EAF51B" ID-CLB-Dataset="302188" ID-DOI="10.11646/phytotaxa.269.3.4" ID-GBIF-Dataset="cf75f694-9112-44dd-b81d-46633ce00bb8" ID-ISSN="1179-3163" IM.bibliography_approvedBy="felipe" IM.illustrations_approvedBy="felipe" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.taxonomicNames_approvedBy="felipe" IM.treatments_approvedBy="felipe" checkinTime="1725381297638" checkinUser="felipe" docAuthor="Vijver, Bart Van De, Kopalová, Kateřina, Zidarova, Ralitsa &amp; Kociolek, J. Patrick" docDate="2016" docId="03E887B3FFBBFF82FF68FB59FEFEBA94" docLanguage="en" docName="phytotaxa.269.3.4.pdf" docOrigin="Phytotaxa 269 (3)" docSource="http://dx.doi.org/10.11646/phytotaxa.269.3.4" docStyle="DocumentStyle:96748F8F1B6C902996E134952A3A36B9.13:Phytotaxa.2014-.journal_article" docStyleId="96748F8F1B6C902996E134952A3A36B9" docStyleName="Phytotaxa.2014-.journal_article" docStyleVersion="13" docTitle="Gomphonema jamesrossense Van de Vijver, Kopalova, Zidarova &amp; Kociolek 2016, sp. nov." docType="treatment" docVersion="3" lastPageNumber="212" masterDocId="FFD1FFCBFFBAFF81FFE0FFA9FFA5B825" masterDocTitle="Two new Gomphonema species (Bacillariophyta) from the Maritime Antarctic Region" masterLastPageNumber="220" masterPageNumber="209" pageNumber="210" updateTime="1725396850517" updateUser="ExternalLinkService" zenodo-license-figures="UNSPECIFIED" zenodo-license-treatments="UNSPECIFIED">
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<mods:title id="A0A7233797B347785ABC1C26C8D26B00">Two new Gomphonema species (Bacillariophyta) from the Maritime Antarctic Region</mods:title>
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<heading id="D0B681C9FFBBFF80FF68FB59FB5EBD2E" bold="true" box="[136,1275,1264,1291]" fontSize="11" level="1" pageId="1" pageNumber="210" reason="1">
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<taxonomicName id="4C414D26FFBBFF80FF68FB59FBA8BD2E" authority="Van de Vijver, Kopalova, Zidarova &amp; Kociolek" authorityName="Van de Vijver, Kopalova, Zidarova &amp; Kociolek" authorityYear="2016" box="[136,1037,1264,1291]" class="Bacillariophyceae" family="Gomphonemataceae" genus="Gomphonema" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="1" pageNumber="210" phylum="Ochrophyta" rank="species" species="jamesrossense" status="sp. nov.">
<emphasis id="B935EAB7FFBBFF80FF68FB59FE72BD2F" bold="true" box="[136,471,1264,1291]" italics="true" pageId="1" pageNumber="210">Gomphonema jamesrossense</emphasis>
Van de Vijver, Kopalová, Zidarova &amp; Kociolek
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,
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<emphasis id="B935EAB7FFBBFF80FBF9FB59FB97BD2F" bold="true" box="[1049,1074,1264,1290]" italics="true" pageId="1" pageNumber="210">sp</emphasis>
.
<emphasis id="B935EAB7FFBBFF80FBA0FB59FBCFBD2F" bold="true" box="[1088,1130,1264,1290]" italics="true" pageId="1" pageNumber="210">nov</emphasis>
.
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(
<figureCitation id="137A2A20FFBBFF80FB60FB5BFB56BD2E" box="[1152,1267,1266,1291]" captionStart="FIGURES 121" captionStartId="2.[136,260,1798,1823]" captionTargetBox="[151,1436,187,1773]" captionTargetId="figure-16@2.[151,1436,187,1773]" captionTargetPageId="2" captionText="FIGURES 121. Gomphonema jamesrossense. LM &amp; SEM pictures taken from the holotype population (sample D15) from Katia II Lake, James Ross Island. 116. Light microscopy observations. 17. External view of an entire valve with focus on the proximal raphe endings, the apical pore field and the position of the stigmoid. Note the variation in areola shapes. 18. External detail of the footpole with the apical pore field and the distal raphe ending. 19. Internal view of an entire valve with focus on the proximal raphe endings and the position of the stigmoid. 20. Internal detail of the central area with the proximal raphe endings and the position of the stigmoid. 21. Girdle view of an entire frustule. Note the presence of the apical pore field almost entirely on the mantle, the hyaline mantle edge and the small areolae terminating the mantle striae. Scale bar represents 10 μm except for Figs 18 &amp; 19 where scale bar = 1 μm." pageId="1" pageNumber="210">Figs 121</figureCitation>
)
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<paragraph id="8BFE36A5FFBBFF80FF68FA95FC6FBF90" blockId="1.[136,1452,1340,2045]" pageId="1" pageNumber="210">
LM (
<figureCitation id="137A2A20FFBBFF80FF5AFA95FEBABD74" box="[186,287,1340,1361]" captionStart="FIGURES 121" captionStartId="2.[136,260,1798,1823]" captionTargetBox="[151,1436,187,1773]" captionTargetId="figure-16@2.[151,1436,187,1773]" captionTargetPageId="2" captionText="FIGURES 121. Gomphonema jamesrossense. LM &amp; SEM pictures taken from the holotype population (sample D15) from Katia II Lake, James Ross Island. 116. Light microscopy observations. 17. External view of an entire valve with focus on the proximal raphe endings, the apical pore field and the position of the stigmoid. Note the variation in areola shapes. 18. External detail of the footpole with the apical pore field and the distal raphe ending. 19. Internal view of an entire valve with focus on the proximal raphe endings and the position of the stigmoid. 20. Internal detail of the central area with the proximal raphe endings and the position of the stigmoid. 21. Girdle view of an entire frustule. Note the presence of the apical pore field almost entirely on the mantle, the hyaline mantle edge and the small areolae terminating the mantle striae. Scale bar represents 10 μm except for Figs 18 &amp; 19 where scale bar = 1 μm." pageId="1" pageNumber="210">Figs 116</figureCitation>
): Frustules in girdle view almost rectangular, weakly clavate with narrower footpole (
<figureCitation id="137A2A20FFBBFF80FB80FA95FB74BD74" box="[1120,1233,1340,1361]" captionStart="FIGURES 121" captionStartId="2.[136,260,1798,1823]" captionTargetBox="[151,1436,187,1773]" captionTargetId="figure-16@2.[151,1436,187,1773]" captionTargetPageId="2" captionText="FIGURES 121. Gomphonema jamesrossense. LM &amp; SEM pictures taken from the holotype population (sample D15) from Katia II Lake, James Ross Island. 116. Light microscopy observations. 17. External view of an entire valve with focus on the proximal raphe endings, the apical pore field and the position of the stigmoid. Note the variation in areola shapes. 18. External detail of the footpole with the apical pore field and the distal raphe ending. 19. Internal view of an entire valve with focus on the proximal raphe endings and the position of the stigmoid. 20. Internal detail of the central area with the proximal raphe endings and the position of the stigmoid. 21. Girdle view of an entire frustule. Note the presence of the apical pore field almost entirely on the mantle, the hyaline mantle edge and the small areolae terminating the mantle striae. Scale bar represents 10 μm except for Figs 18 &amp; 19 where scale bar = 1 μm." pageId="1" pageNumber="210">Figs 15, 16</figureCitation>
). Valves linear-clavate with almost parallel margins and broadly rounded obtuse head- and footpole. Valves occasionally asymmetrical to the apical axis. Valve dimensions (n=25): length 2037 μm, width 3.54.5 μm, the greatest width being almost in the middle of the valve. Axial area narrow, linear to linear-lanceolate, almost 1/6 of the total valve width, never widened until the central area. Central area asymmetrical, rectangular. One side with one very shortened stria, other side with one longer stria. Stigmoid present at the end of the longer stria, almost not separated from the last areola. Raphe branches undulate, weakly lateral with straight to slightly deflected, simple proximal raphe endings and hooked distal fissures. Striae clearly radiate near the central area becoming almost parallel towards the headpole,
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10 μm. Near the apices, striae positioned more closely together, up to
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10 μm. Areolae almost not discernible in LM. SEM (
<figureCitation id="137A2A20FFBBFF80FE37F9F5FDE2BE54" box="[471,583,1628,1649]" captionStart="FIGURES 121" captionStartId="2.[136,260,1798,1823]" captionTargetBox="[151,1436,187,1773]" captionTargetId="figure-16@2.[151,1436,187,1773]" captionTargetPageId="2" captionText="FIGURES 121. Gomphonema jamesrossense. LM &amp; SEM pictures taken from the holotype population (sample D15) from Katia II Lake, James Ross Island. 116. Light microscopy observations. 17. External view of an entire valve with focus on the proximal raphe endings, the apical pore field and the position of the stigmoid. Note the variation in areola shapes. 18. External detail of the footpole with the apical pore field and the distal raphe ending. 19. Internal view of an entire valve with focus on the proximal raphe endings and the position of the stigmoid. 20. Internal detail of the central area with the proximal raphe endings and the position of the stigmoid. 21. Girdle view of an entire frustule. Note the presence of the apical pore field almost entirely on the mantle, the hyaline mantle edge and the small areolae terminating the mantle striae. Scale bar represents 10 μm except for Figs 18 &amp; 19 where scale bar = 1 μm." pageId="1" pageNumber="210">Figs 1721</figureCitation>
): Striae uniseriate composed of “C”- to “3”-shaped areolae (
<figureCitation id="137A2A20FFBBFF80FB67F9F5FB50BE54" box="[1159,1269,1628,1649]" captionStart="FIGURES 121" captionStartId="2.[136,260,1798,1823]" captionTargetBox="[151,1436,187,1773]" captionTargetId="figure-16@2.[151,1436,187,1773]" captionTargetPageId="2" captionText="FIGURES 121. Gomphonema jamesrossense. LM &amp; SEM pictures taken from the holotype population (sample D15) from Katia II Lake, James Ross Island. 116. Light microscopy observations. 17. External view of an entire valve with focus on the proximal raphe endings, the apical pore field and the position of the stigmoid. Note the variation in areola shapes. 18. External detail of the footpole with the apical pore field and the distal raphe ending. 19. Internal view of an entire valve with focus on the proximal raphe endings and the position of the stigmoid. 20. Internal detail of the central area with the proximal raphe endings and the position of the stigmoid. 21. Girdle view of an entire frustule. Note the presence of the apical pore field almost entirely on the mantle, the hyaline mantle edge and the small areolae terminating the mantle striae. Scale bar represents 10 μm except for Figs 18 &amp; 19 where scale bar = 1 μm." pageId="1" pageNumber="210">Figs 17, 18</figureCitation>
). Striae continuing uninterruptedly onto the mantle, eventually terminating in one small rounded areola (
<figureCitation id="137A2A20FFBBFF80FC02F929FB8CBEB0" box="[994,1065,1664,1685]" captionStart="FIGURES 121" captionStartId="2.[136,260,1798,1823]" captionTargetBox="[151,1436,187,1773]" captionTargetId="figure-16@2.[151,1436,187,1773]" captionTargetPageId="2" captionText="FIGURES 121. Gomphonema jamesrossense. LM &amp; SEM pictures taken from the holotype population (sample D15) from Katia II Lake, James Ross Island. 116. Light microscopy observations. 17. External view of an entire valve with focus on the proximal raphe endings, the apical pore field and the position of the stigmoid. Note the variation in areola shapes. 18. External detail of the footpole with the apical pore field and the distal raphe ending. 19. Internal view of an entire valve with focus on the proximal raphe endings and the position of the stigmoid. 20. Internal detail of the central area with the proximal raphe endings and the position of the stigmoid. 21. Girdle view of an entire frustule. Note the presence of the apical pore field almost entirely on the mantle, the hyaline mantle edge and the small areolae terminating the mantle striae. Scale bar represents 10 μm except for Figs 18 &amp; 19 where scale bar = 1 μm." pageId="1" pageNumber="210">Fig. 21</figureCitation>
). Mantle edge forming a relatively broad hyaline zone (
<figureCitation id="137A2A20FFBBFF80FEA2F90DFE2CBE9C" box="[322,393,1700,1721]" captionStart="FIGURES 121" captionStartId="2.[136,260,1798,1823]" captionTargetBox="[151,1436,187,1773]" captionTargetId="figure-16@2.[151,1436,187,1773]" captionTargetPageId="2" captionText="FIGURES 121. Gomphonema jamesrossense. LM &amp; SEM pictures taken from the holotype population (sample D15) from Katia II Lake, James Ross Island. 116. Light microscopy observations. 17. External view of an entire valve with focus on the proximal raphe endings, the apical pore field and the position of the stigmoid. Note the variation in areola shapes. 18. External detail of the footpole with the apical pore field and the distal raphe ending. 19. Internal view of an entire valve with focus on the proximal raphe endings and the position of the stigmoid. 20. Internal detail of the central area with the proximal raphe endings and the position of the stigmoid. 21. Girdle view of an entire frustule. Note the presence of the apical pore field almost entirely on the mantle, the hyaline mantle edge and the small areolae terminating the mantle striae. Scale bar represents 10 μm except for Figs 18 &amp; 19 where scale bar = 1 μm." pageId="1" pageNumber="210">Fig. 21</figureCitation>
). Footpole with a hyaline tip, bordered by a large apical pore field composed of up to 8 rows of very small pores (
<figureCitation id="137A2A20FFBBFF80FF25F961FEAFBEF8" box="[197,266,1736,1757]" captionStart="FIGURES 121" captionStartId="2.[136,260,1798,1823]" captionTargetBox="[151,1436,187,1773]" captionTargetId="figure-16@2.[151,1436,187,1773]" captionTargetPageId="2" captionText="FIGURES 121. Gomphonema jamesrossense. LM &amp; SEM pictures taken from the holotype population (sample D15) from Katia II Lake, James Ross Island. 116. Light microscopy observations. 17. External view of an entire valve with focus on the proximal raphe endings, the apical pore field and the position of the stigmoid. Note the variation in areola shapes. 18. External detail of the footpole with the apical pore field and the distal raphe ending. 19. Internal view of an entire valve with focus on the proximal raphe endings and the position of the stigmoid. 20. Internal detail of the central area with the proximal raphe endings and the position of the stigmoid. 21. Girdle view of an entire frustule. Note the presence of the apical pore field almost entirely on the mantle, the hyaline mantle edge and the small areolae terminating the mantle striae. Scale bar represents 10 μm except for Figs 18 &amp; 19 where scale bar = 1 μm." pageId="1" pageNumber="210">Fig. 18</figureCitation>
). Apical pore field bisected by the distal raphe fissures (
<figureCitation id="137A2A20FFBBFF80FCFCF961FCC7BEF8" box="[796,866,1736,1757]" captionStart="FIGURES 121" captionStartId="2.[136,260,1798,1823]" captionTargetBox="[151,1436,187,1773]" captionTargetId="figure-16@2.[151,1436,187,1773]" captionTargetPageId="2" captionText="FIGURES 121. Gomphonema jamesrossense. LM &amp; SEM pictures taken from the holotype population (sample D15) from Katia II Lake, James Ross Island. 116. Light microscopy observations. 17. External view of an entire valve with focus on the proximal raphe endings, the apical pore field and the position of the stigmoid. Note the variation in areola shapes. 18. External detail of the footpole with the apical pore field and the distal raphe ending. 19. Internal view of an entire valve with focus on the proximal raphe endings and the position of the stigmoid. 20. Internal detail of the central area with the proximal raphe endings and the position of the stigmoid. 21. Girdle view of an entire frustule. Note the presence of the apical pore field almost entirely on the mantle, the hyaline mantle edge and the small areolae terminating the mantle striae. Scale bar represents 10 μm except for Figs 18 &amp; 19 where scale bar = 1 μm." pageId="1" pageNumber="210">Fig. 18</figureCitation>
). External raphe branches clearly undulate (
<figureCitation id="137A2A20FFBBFF80FAE3F961FAE2BEF8" box="[1283,1351,1736,1757]" captionStart="FIGURES 121" captionStartId="2.[136,260,1798,1823]" captionTargetBox="[151,1436,187,1773]" captionTargetId="figure-16@2.[151,1436,187,1773]" captionTargetPageId="2" captionText="FIGURES 121. Gomphonema jamesrossense. LM &amp; SEM pictures taken from the holotype population (sample D15) from Katia II Lake, James Ross Island. 116. Light microscopy observations. 17. External view of an entire valve with focus on the proximal raphe endings, the apical pore field and the position of the stigmoid. Note the variation in areola shapes. 18. External detail of the footpole with the apical pore field and the distal raphe ending. 19. Internal view of an entire valve with focus on the proximal raphe endings and the position of the stigmoid. 20. Internal detail of the central area with the proximal raphe endings and the position of the stigmoid. 21. Girdle view of an entire frustule. Note the presence of the apical pore field almost entirely on the mantle, the hyaline mantle edge and the small areolae terminating the mantle striae. Scale bar represents 10 μm except for Figs 18 &amp; 19 where scale bar = 1 μm." pageId="1" pageNumber="210">Fig. 17</figureCitation>
). External proximal endings weakly deflected terminating in simple, almost non-expanded pores (
<figureCitation id="137A2A20FFBBFF80FBFDF945FBC3BF24" box="[1053,1126,1772,1793]" captionStart="FIGURES 121" captionStartId="2.[136,260,1798,1823]" captionTargetBox="[151,1436,187,1773]" captionTargetId="figure-16@2.[151,1436,187,1773]" captionTargetPageId="2" captionText="FIGURES 121. Gomphonema jamesrossense. LM &amp; SEM pictures taken from the holotype population (sample D15) from Katia II Lake, James Ross Island. 116. Light microscopy observations. 17. External view of an entire valve with focus on the proximal raphe endings, the apical pore field and the position of the stigmoid. Note the variation in areola shapes. 18. External detail of the footpole with the apical pore field and the distal raphe ending. 19. Internal view of an entire valve with focus on the proximal raphe endings and the position of the stigmoid. 20. Internal detail of the central area with the proximal raphe endings and the position of the stigmoid. 21. Girdle view of an entire frustule. Note the presence of the apical pore field almost entirely on the mantle, the hyaline mantle edge and the small areolae terminating the mantle striae. Scale bar represents 10 μm except for Figs 18 &amp; 19 where scale bar = 1 μm." pageId="1" pageNumber="210">Fig. 17</figureCitation>
). Distal raphe fissures (strongly) hooked, almost not continuing onto the mantle (
<figureCitation id="137A2A20FFBBFF80FD6BF8B9FD77BF00" box="[651,722,1808,1829]" captionStart="FIGURES 121" captionStartId="2.[136,260,1798,1823]" captionTargetBox="[151,1436,187,1773]" captionTargetId="figure-16@2.[151,1436,187,1773]" captionTargetPageId="2" captionText="FIGURES 121. Gomphonema jamesrossense. LM &amp; SEM pictures taken from the holotype population (sample D15) from Katia II Lake, James Ross Island. 116. Light microscopy observations. 17. External view of an entire valve with focus on the proximal raphe endings, the apical pore field and the position of the stigmoid. Note the variation in areola shapes. 18. External detail of the footpole with the apical pore field and the distal raphe ending. 19. Internal view of an entire valve with focus on the proximal raphe endings and the position of the stigmoid. 20. Internal detail of the central area with the proximal raphe endings and the position of the stigmoid. 21. Girdle view of an entire frustule. Note the presence of the apical pore field almost entirely on the mantle, the hyaline mantle edge and the small areolae terminating the mantle striae. Scale bar represents 10 μm except for Figs 18 &amp; 19 where scale bar = 1 μm." pageId="1" pageNumber="210">Fig. 18</figureCitation>
). External stigmoid opening rounded, not more distantly separated from the last areola of the central stria (
<figureCitation id="137A2A20FFBBFF80FE0CF89DFD91BF6C" box="[492,564,1844,1865]" captionStart="FIGURES 121" captionStartId="2.[136,260,1798,1823]" captionTargetBox="[151,1436,187,1773]" captionTargetId="figure-16@2.[151,1436,187,1773]" captionTargetPageId="2" captionText="FIGURES 121. Gomphonema jamesrossense. LM &amp; SEM pictures taken from the holotype population (sample D15) from Katia II Lake, James Ross Island. 116. Light microscopy observations. 17. External view of an entire valve with focus on the proximal raphe endings, the apical pore field and the position of the stigmoid. Note the variation in areola shapes. 18. External detail of the footpole with the apical pore field and the distal raphe ending. 19. Internal view of an entire valve with focus on the proximal raphe endings and the position of the stigmoid. 20. Internal detail of the central area with the proximal raphe endings and the position of the stigmoid. 21. Girdle view of an entire frustule. Note the presence of the apical pore field almost entirely on the mantle, the hyaline mantle edge and the small areolae terminating the mantle striae. Scale bar represents 10 μm except for Figs 18 &amp; 19 where scale bar = 1 μm." pageId="1" pageNumber="210">Fig. 17</figureCitation>
). Foot- and headpole with small pseudoseptum (
<figureCitation id="137A2A20FFBBFF80FBF4F89DFBF8BF6C" box="[1044,1117,1844,1865]" captionStart="FIGURES 121" captionStartId="2.[136,260,1798,1823]" captionTargetBox="[151,1436,187,1773]" captionTargetId="figure-16@2.[151,1436,187,1773]" captionTargetPageId="2" captionText="FIGURES 121. Gomphonema jamesrossense. LM &amp; SEM pictures taken from the holotype population (sample D15) from Katia II Lake, James Ross Island. 116. Light microscopy observations. 17. External view of an entire valve with focus on the proximal raphe endings, the apical pore field and the position of the stigmoid. Note the variation in areola shapes. 18. External detail of the footpole with the apical pore field and the distal raphe ending. 19. Internal view of an entire valve with focus on the proximal raphe endings and the position of the stigmoid. 20. Internal detail of the central area with the proximal raphe endings and the position of the stigmoid. 21. Girdle view of an entire frustule. Note the presence of the apical pore field almost entirely on the mantle, the hyaline mantle edge and the small areolae terminating the mantle striae. Scale bar represents 10 μm except for Figs 18 &amp; 19 where scale bar = 1 μm." pageId="1" pageNumber="210">Fig. 19</figureCitation>
). Internally, central nodule raised. Internal proximal raphe endings positioned closely together, clearly recurved (
<figureCitation id="137A2A20FFBBFF80FC58F8F1FBA4BF48" box="[952,1025,1880,1901]" captionStart="FIGURES 121" captionStartId="2.[136,260,1798,1823]" captionTargetBox="[151,1436,187,1773]" captionTargetId="figure-16@2.[151,1436,187,1773]" captionTargetPageId="2" captionText="FIGURES 121. Gomphonema jamesrossense. LM &amp; SEM pictures taken from the holotype population (sample D15) from Katia II Lake, James Ross Island. 116. Light microscopy observations. 17. External view of an entire valve with focus on the proximal raphe endings, the apical pore field and the position of the stigmoid. Note the variation in areola shapes. 18. External detail of the footpole with the apical pore field and the distal raphe ending. 19. Internal view of an entire valve with focus on the proximal raphe endings and the position of the stigmoid. 20. Internal detail of the central area with the proximal raphe endings and the position of the stigmoid. 21. Girdle view of an entire frustule. Note the presence of the apical pore field almost entirely on the mantle, the hyaline mantle edge and the small areolae terminating the mantle striae. Scale bar represents 10 μm except for Figs 18 &amp; 19 where scale bar = 1 μm." pageId="1" pageNumber="210">Fig. 20</figureCitation>
). Distal raphe endings terminating on small helictoglossae (
<figureCitation id="137A2A20FFBBFF80FEB2F8D5FE3CBFB4" box="[338,409,1916,1937]" captionStart="FIGURES 121" captionStartId="2.[136,260,1798,1823]" captionTargetBox="[151,1436,187,1773]" captionTargetId="figure-16@2.[151,1436,187,1773]" captionTargetPageId="2" captionText="FIGURES 121. Gomphonema jamesrossense. LM &amp; SEM pictures taken from the holotype population (sample D15) from Katia II Lake, James Ross Island. 116. Light microscopy observations. 17. External view of an entire valve with focus on the proximal raphe endings, the apical pore field and the position of the stigmoid. Note the variation in areola shapes. 18. External detail of the footpole with the apical pore field and the distal raphe ending. 19. Internal view of an entire valve with focus on the proximal raphe endings and the position of the stigmoid. 20. Internal detail of the central area with the proximal raphe endings and the position of the stigmoid. 21. Girdle view of an entire frustule. Note the presence of the apical pore field almost entirely on the mantle, the hyaline mantle edge and the small areolae terminating the mantle striae. Scale bar represents 10 μm except for Figs 18 &amp; 19 where scale bar = 1 μm." pageId="1" pageNumber="210">Fig. 19</figureCitation>
). Striae internally bearing vimines, oriented perpendicularly to the striae. Occasionally, areolae subdivided by transapical vimines (
<figureCitation id="137A2A20FFBBFF80FE65F809FE6EBF90" box="[389,459,1952,1973]" captionStart="FIGURES 121" captionStartId="2.[136,260,1798,1823]" captionTargetBox="[151,1436,187,1773]" captionTargetId="figure-16@2.[151,1436,187,1773]" captionTargetPageId="2" captionText="FIGURES 121. Gomphonema jamesrossense. LM &amp; SEM pictures taken from the holotype population (sample D15) from Katia II Lake, James Ross Island. 116. Light microscopy observations. 17. External view of an entire valve with focus on the proximal raphe endings, the apical pore field and the position of the stigmoid. Note the variation in areola shapes. 18. External detail of the footpole with the apical pore field and the distal raphe ending. 19. Internal view of an entire valve with focus on the proximal raphe endings and the position of the stigmoid. 20. Internal detail of the central area with the proximal raphe endings and the position of the stigmoid. 21. Girdle view of an entire frustule. Note the presence of the apical pore field almost entirely on the mantle, the hyaline mantle edge and the small areolae terminating the mantle striae. Scale bar represents 10 μm except for Figs 18 &amp; 19 where scale bar = 1 μm." pageId="1" pageNumber="210">Fig. 20</figureCitation>
, arrow). Internal stigmoid opening slit-like (
<figureCitation id="137A2A20FFBBFF80FC96F809FC1BBF90" box="[886,958,1952,1973]" captionStart="FIGURES 121" captionStartId="2.[136,260,1798,1823]" captionTargetBox="[151,1436,187,1773]" captionTargetId="figure-16@2.[151,1436,187,1773]" captionTargetPageId="2" captionText="FIGURES 121. Gomphonema jamesrossense. LM &amp; SEM pictures taken from the holotype population (sample D15) from Katia II Lake, James Ross Island. 116. Light microscopy observations. 17. External view of an entire valve with focus on the proximal raphe endings, the apical pore field and the position of the stigmoid. Note the variation in areola shapes. 18. External detail of the footpole with the apical pore field and the distal raphe ending. 19. Internal view of an entire valve with focus on the proximal raphe endings and the position of the stigmoid. 20. Internal detail of the central area with the proximal raphe endings and the position of the stigmoid. 21. Girdle view of an entire frustule. Note the presence of the apical pore field almost entirely on the mantle, the hyaline mantle edge and the small areolae terminating the mantle striae. Scale bar represents 10 μm except for Figs 18 &amp; 19 where scale bar = 1 μm." pageId="1" pageNumber="210">Fig. 20</figureCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="C35B652EFFBBFF80FF68F86DFBE7BFD8" pageId="1" pageNumber="210" type="materials_examined">
<paragraph id="8BFE36A5FFBBFF80FF68F86DFBE7BFD8" blockId="1.[136,1452,1340,2045]" pageId="1" pageNumber="210">
<emphasis id="B935EAB7FFBBFF80FF68F86DFF7FBFFC" bold="true" box="[136,218,1988,2009]" pageId="1" pageNumber="210">Type:—</emphasis>
<collectionCode id="ED50AE60FFBBFF80FF3AF86DFE6FBFFC" box="[218,458,1988,2009]" pageId="1" pageNumber="210">JAMES ROSS ISLAND</collectionCode>
. Ulu Peninsula: Lake Katia II, sample D15 (
<geoCoordinate id="EE755062FFBBFF80FC98F86DFBAABFFC" box="[888,1039,1988,2009]" degrees="63" direction="south" minutes="52" orientation="latitude" pageId="1" pageNumber="210" precision="1" seconds="15.9" value="-63.871082">63° 52 15.9” S</geoCoordinate>
, 57° 58 32.5”),
<emphasis id="B935EAB7FFBBFF80FB50F86DFB18BFFC" box="[1200,1213,1988,2009]" italics="true" pageId="1" pageNumber="210">L</emphasis>
.
<emphasis id="B935EAB7FFBBFF80FB2AF86DFA97BFFC" box="[1226,1330,1988,2009]" italics="true" pageId="1" pageNumber="210">Nedbalová</emphasis>
,
<emphasis id="B935EAB7FFBBFF80FADEF86DFF48BFD8" italics="true" pageId="1" pageNumber="210">
<date id="FFFF1065FFBBFF80FADEF86DFF48BFD8" pageId="1" pageNumber="210" value="2008-02-01">1 February 2008</date>
</emphasis>
(
<typeStatus id="54FA8807FFBBFF80FF1AF841FEF5BFD8" box="[250,336,2024,2045]" pageId="1" pageNumber="210" type="holotype">holotype</typeStatus>
<collectionCode id="ED50AE60FFBBFF80FEB5F841FEDFBFD8" box="[341,378,2024,2045]" country="Brazil" name="Embrapa Agrobiology Diazothrophic Microbial Culture Collection" pageId="1" pageNumber="210">BR</collectionCode>
! slide no. 4444,
<typeStatus id="54FA8807FFBBFF80FDF7F841FDF9BFD8" box="[535,604,2024,2045]" pageId="1" pageNumber="210" type="isotype">isotype</typeStatus>
<collectionCode id="ED50AE60FFBBFF80FD82F841FD35BFD8" box="[610,656,2024,2045]" country="India" httpUri="http://biocol.org/urn:lsid:biocol.org:col:15781" lsid="urn:lsid:biocol.org:col:15781" name="Institute of Himalayan Bioresource Technology" pageId="1" pageNumber="210" type="Herbarium">PLP</collectionCode>
! slide 299, University of Antwerp, Belgium).
</paragraph>
</subSubSection>
<caption id="DF3E662DFFB8FF83FF68F8AFFA8BB03E" pageId="2" pageNumber="211" startId="2.[136,260,1798,1823]" targetBox="[151,1436,187,1773]" targetPageId="2" targetType="figure">
<paragraph id="8BFE36A5FFB8FF83FF68F8AFFA8BB03E" blockId="2.[136,1452,1798,2075]" pageId="2" pageNumber="211">
<emphasis id="B935EAB7FFB8FF83FF68F8AFFEE7BF3A" bold="true" box="[136,322,1798,1823]" pageId="2" pageNumber="211">FIGURES 121</emphasis>
.
<taxonomicName id="4C414D26FFB8FF83FEAFF8AFFD36BF3A" authorityName="Van de Vijver, Kopalova, Zidarova &amp; Kociolek" authorityYear="2016" box="[335,659,1798,1823]" class="Bacillariophyceae" family="Gomphonemataceae" genus="Gomphonema" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="2" pageNumber="211" phylum="Ochrophyta" rank="species" species="jamesrossense">
<emphasis id="B935EAB7FFB8FF83FEAFF8AFFD36BF3A" box="[335,659,1798,1823]" italics="true" pageId="2" pageNumber="211">Gomphonema jamesrossense</emphasis>
</taxonomicName>
. LM &amp; SEM pictures taken from the holotype population (sample D15) from Katia II Lake, James Ross Island. 116. Light microscopy observations. 17. External view of an entire valve with focus on the proximal raphe endings, the apical pore field and the position of the stigmoid. Note the variation in areola shapes. 18. External detail of the footpole with the apical pore field and the distal raphe ending. 19. Internal view of an entire valve with focus on the proximal raphe endings and the position of the stigmoid. 20. Internal detail of the central area with the proximal raphe endings and the position of the stigmoid. 21. Girdle view of an entire frustule. Note the presence of the apical pore field almost entirely on the mantle, the hyaline mantle edge and the small areolae terminating the mantle striae. Scale bar represents 10 μm except for Figs 18 &amp; 19 where scale bar = 1 μm.
</paragraph>
</caption>
<subSubSection id="C35B652EFFB9FF82FF68FF09FA3AB96C" pageId="3" pageNumber="212" type="biology_ecology">
<paragraph id="8BFE36A5FFB9FF82FF68FF09FA3AB96C" blockId="3.[136,1452,160,689]" pageId="3" pageNumber="212">
<emphasis id="B935EAB7FFB9FF82FF68FF09FE08B89C" bold="true" box="[136,429,160,185]" pageId="3" pageNumber="212">Ecology and distribution</emphasis>
:
<emphasis id="B935EAB7FFB9FF82FE55FF09FE74B89C" bold="true" box="[437,465,160,185]" pageId="3" pageNumber="212"></emphasis>
The highest relative abundance of
<taxonomicName id="4C414D26FFB9FF82FCACFF09FB2AB89C" authorityName="Van de Vijver, Kopalova, Zidarova &amp; Kociolek" authorityYear="2016" box="[844,1167,160,185]" class="Bacillariophyceae" family="Gomphonemataceae" genus="Gomphonema" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="3" pageNumber="212" phylum="Ochrophyta" rank="species" species="jamesrossense">
<emphasis id="B935EAB7FFB9FF82FCACFF09FB2AB89C" box="[844,1167,160,185]" italics="true" pageId="3" pageNumber="212">Gomphonema jamesrossense</emphasis>
</taxonomicName>
was found in an epilithon sample, collected from Katia II Lake, on the Ulu Peninsula, at an altitude of
<quantity id="4CB99B40FFB9FF82FC17FF6DFB97B8F8" box="[1015,1074,196,221]" metricMagnitude="1" metricUnit="m" metricValue="4.5" pageId="3" pageNumber="212" unit="m" value="45.0">45 m</quantity>
a.s.l. The lake has circumneutral pH (7.3) with a moderate conductivity (580 μS/cm), very low nutrient but higher salinity levels (
<superScript id="7C349BEDFFB9FF82FB34FF41FB50B8D1" attach="left" box="[1236,1269,230,257]" fontSize="6" pageId="3" pageNumber="212">Cl-</superScript>
<quantity id="4CB99B40FFB9FF82FB1DFF41FAF0B924" box="[1277,1365,232,257]" metricMagnitude="-4" metricUnit="kg" metricValue="1.06" pageId="3" pageNumber="212" unit="mg" value="106.0">106 mg</quantity>
/l, SO
<subScript id="17C534E0FFB9FF82FA76FF50FA3BB922" attach="left" box="[1430,1438,249,263]" fontSize="6" pageId="3" pageNumber="212">4</subScript>
<superScript id="7C349BEDFFB9FF82FA7EFF4FFA0EB8D1" attach="right" box="[1438,1451,230,244]" fontSize="6" pageId="3" pageNumber="212">2-</superScript>
:
<quantity id="4CB99B40FFB9FF82FF7AFEA5FF43B900" box="[154,230,268,293]" metricMagnitude="-5" metricUnit="kg" metricValue="6.6" pageId="3" pageNumber="212" unit="mg" value="66.0">66 mg</quantity>
/l). The species was likewise found in several other samples of James Ross Island but always in very low abundances. On other investigated localities of the Maritime Antarctic Region, the species seems to be absent so far.
</paragraph>
</subSubSection>
<subSubSection id="C35B652EFFB9FF82FF5DFEFDFEFEBA94" pageId="3" pageNumber="212" type="etymology">
<paragraph id="8BFE36A5FFB9FF82FF5DFEFDFABDB948" blockId="3.[136,1452,160,689]" box="[189,1304,340,365]" pageId="3" pageNumber="212">
<emphasis id="B935EAB7FFB9FF82FF5DFEFDFE9BB948" bold="true" box="[189,318,340,365]" pageId="3" pageNumber="212">Etymology</emphasis>
:
<emphasis id="B935EAB7FFB9FF82FEA6FEFDFEC7B948" bold="true" box="[326,354,340,365]" pageId="3" pageNumber="212"></emphasis>
The species is named after James Ross Island where several populations were found.
</paragraph>
<paragraph id="8BFE36A5FFB9FF82FF5DFED1FEFEBA94" blockId="3.[136,1452,160,689]" pageId="3" pageNumber="212">
<emphasis id="B935EAB7FFB9FF82FF5DFED1FE14B9B4" bold="true" box="[189,433,376,401]" pageId="3" pageNumber="212">Taxonomic remarks</emphasis>
:
<emphasis id="B935EAB7FFB9FF82FE58FED1FE71B9B4" bold="true" box="[440,468,376,401]" pageId="3" pageNumber="212"></emphasis>
Although
<taxonomicName id="4C414D26FFB9FF82FDA9FED1FC34B9B4" authorityName="Van de Vijver, Kopalova, Zidarova &amp; Kociolek" authorityYear="2016" box="[585,913,376,401]" class="Bacillariophyceae" family="Gomphonemataceae" genus="Gomphonema" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="3" pageNumber="212" phylum="Ochrophyta" rank="species" species="jamesrossense">
<emphasis id="B935EAB7FFB9FF82FDA9FED1FC34B9B4" box="[585,913,376,401]" italics="true" pageId="3" pageNumber="212">Gomphonema jamesrossense</emphasis>
</taxonomicName>
shows a typical gomphonemoid structure and outline, there are hardly any
<taxonomicName id="4C414D26FFB9FF82FE2BFE35FDCDB990" authorityName="Ehrenberg" authorityYear="1832" box="[459,616,412,437]" class="Bacillariophyceae" family="Gomphonemataceae" genus="Gomphonema" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="3" pageNumber="212" phylum="Ochrophyta" rank="genus">
<emphasis id="B935EAB7FFB9FF82FE2BFE35FDCDB990" box="[459,616,412,437]" italics="true" pageId="3" pageNumber="212">Gomphonema</emphasis>
</taxonomicName>
taxa that can be confused with the new species.
<taxonomicName id="4C414D26FFB9FF82FB6BFE35FED0B9FC" authority="Reichardt (1999: 25)" authorityName="Reichardt" authorityPageNumber="25" authorityYear="1999" class="Bacillariophyceae" family="Gomphonemataceae" genus="Gomphonema" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="3" pageNumber="212" phylum="Ochrophyta" rank="species" species="clavatulum">
<emphasis id="B935EAB7FFB9FF82FB6BFE35FA0EB990" box="[1163,1451,412,437]" italics="true" pageId="3" pageNumber="212">Gomphonema clavatulum</emphasis>
<bibRefCitation id="EFD04B54FFB9FF82FF68FE69FED0B9FC" author="Reichardt, E." box="[136,373,448,473]" pageId="3" pageNumber="212" pagination="1 - 203" refId="ref7318" refString="Reichardt, E. (1999) Zur Revision der Gattung Gomphonema. Die Arten um G. affine / insigne, G. angustatum / micropus, G. acuminatum sowie gomphonemoide Diatomeen aus dem Oberoligozan in Bohmen. Iconographia Diatomologica 8: 1 - 203." type="journal article" year="1999">Reichardt (1999: 25)</bibRefCitation>
</taxonomicName>
shows a slight resemblance in valve outline although the footpole in the later is more acutely rounded giving the valve a more clavate outline compared to the almost linear valves in
<taxonomicName id="4C414D26FFB9FF82FBA2FE4DFAA6B9D8" authorityName="Van de Vijver, Kopalova, Zidarova &amp; Kociolek" authorityYear="2016" box="[1090,1283,484,509]" class="Bacillariophyceae" family="Gomphonemataceae" genus="Gomphonema" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="3" pageNumber="212" phylum="Ochrophyta" rank="species" species="jamesrossense">
<emphasis id="B935EAB7FFB9FF82FBA2FE4DFBF3B9D8" box="[1090,1110,484,509]" italics="true" pageId="3" pageNumber="212">G</emphasis>
.
<emphasis id="B935EAB7FFB9FF82FB82FE4DFAA6B9D8" box="[1122,1283,484,509]" italics="true" pageId="3" pageNumber="212">jamesrossense</emphasis>
</taxonomicName>
.
<taxonomicName id="4C414D26FFB9FF82FAEEFE4DFDA0BA04" authority="Gregory (1856: 13)" authorityName="Gregory" authorityPageNumber="13" authorityYear="1856" class="Bacillariophyceae" family="Gomphonemataceae" genus="Gomphonema" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="3" pageNumber="212" phylum="Ochrophyta" rank="species" species="sarcophagus">
<emphasis id="B935EAB7FFB9FF82FAEEFE4DFEB3BA04" italics="true" pageId="3" pageNumber="212">Gomphonema sarcophagus</emphasis>
<bibRefCitation id="EFD04B54FFB9FF82FEC2FDA1FDA0BA04" author="Gregory, W." box="[290,517,520,545]" pageId="3" pageNumber="212" pagination="1 - 14" refId="ref5694" refString="Gregory, W. (1856) Notice of some new species of British Fresh-water Diatomaceae. Quarterly Journal of Microscopical Science, new series, London 4: 1 - 14." type="journal article" year="1856">Gregory (1856: 13)</bibRefCitation>
</taxonomicName>
has a similar linear outline, but with clearly protracted, rostrate headpoles and footpoles. The Antarctic
<taxonomicName id="4C414D26FFB9FF82FE7FFD85FD12BA60" authorityName="Kociolek &amp; Jones" authorityYear="1995" box="[415,695,556,581]" class="Bacillariophyceae" family="Gomphonemataceae" genus="Gomphonema" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="3" pageNumber="212" phylum="Ochrophyta" rank="species" species="signyensis">
<emphasis id="B935EAB7FFB9FF82FE7FFD85FD12BA60" box="[415,695,556,581]" italics="true" pageId="3" pageNumber="212">Gomphonema signyensis</emphasis>
</taxonomicName>
has a less linear valve outline with a narrower headpole, compared to
<taxonomicName id="4C414D26FFB9FF82FF48FDF9FECBBA4C" authorityName="Van de Vijver, Kopalova, Zidarova &amp; Kociolek" authorityYear="2016" box="[168,366,592,617]" class="Bacillariophyceae" family="Gomphonemataceae" genus="Gomphonema" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="3" pageNumber="212" phylum="Ochrophyta" rank="species" species="jamesrossense">
<emphasis id="B935EAB7FFB9FF82FF48FDF9FF19BA4C" box="[168,188,592,617]" italics="true" pageId="3" pageNumber="212">G</emphasis>
.
<emphasis id="B935EAB7FFB9FF82FF2DFDF9FECBBA4C" box="[205,366,592,617]" italics="true" pageId="3" pageNumber="212">jamesrossense</emphasis>
</taxonomicName>
, a larger valve width of more than 5 μm (
<bibRefCitation id="EFD04B54FFB9FF82FCBFFDF9FBD1BA4C" author="Kociolek, J. P. &amp; Jones, V. L." box="[863,1140,592,617]" pageId="3" pageNumber="212" pagination="269 - 276" refId="ref6056" refString="Kociolek, J. P. &amp; Jones, V. L. (1995) Gomphonema signyensis sp. nov., a freshwater diatom from maritime Antarctica. Diatom Research 10: 269 - 276. http: // dx. doi. org / 10.1080 / 0269249 X. 1995.9705349" type="journal article" year="1995">Kociolek &amp; Jones 1995</bibRefCitation>
), whereas the valves of
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<emphasis id="B935EAB7FFB9FF82FA70FDF9FA01BA4C" box="[1424,1444,592,617]" italics="true" pageId="3" pageNumber="212">G</emphasis>
.
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</taxonomicName>
do not exceed 4.5 μm in width, and a finer striation of up to 18 striae in 10 μm (instead of up to
<quantity id="4CB99B40FFB9FF82FA92FDDDFA09BAA8" box="[1394,1452,628,653]" metricMagnitude="-1" metricUnit="m" metricValue="3.556" pageId="3" pageNumber="212" unit="in" value="14.0">14 in</quantity>
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<emphasis id="B935EAB7FFB9FF82FF68FD31FF39BA94" box="[136,156,664,689]" italics="true" pageId="3" pageNumber="212">G</emphasis>
.
<emphasis id="B935EAB7FFB9FF82FF4AFD31FEEEBA94" box="[170,331,664,689]" italics="true" pageId="3" pageNumber="212">jamesrossense</emphasis>
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).
</paragraph>
</subSubSection>
</treatment>
</document>