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<document id="9E493A741C07210074B500B2C7CCB697" ID-DOI="10.11646/phytotaxa.607.3.2" ID-ISSN="1179-3163" ID-Zenodo-Dep="8243269" IM.bibliography_approvedBy="felipe" IM.illustrations_approvedBy="felipe" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="GgImagineBatch" IM.taxonomicNames_approvedBy="felipe" IM.treatments_approvedBy="felipe" checkinTime="1691940191360" checkinUser="plazi" docAuthor="Hernández-Becerril, David U." docDate="2023" docId="1F6E031EFFD65675BCDB0ED5DB05F95C" docLanguage="en" docName="phytotaxa.607.3.2.pdf" docOrigin="Phytotaxa 607 (3)" docSource="http://dx.doi.org/10.11646/phytotaxa.607.3.2" docStyle="DocumentStyle:96748F8F1B6C902996E134952A3A36B9.6:Phytotaxa.2014-.journal_article" docStyleId="96748F8F1B6C902996E134952A3A36B9" docStyleName="Phytotaxa.2014-.journal_article" docStyleVersion="6" docTitle="Skeletonema pseudocostatum Zingone et Sarno" docType="treatment" docVersion="2" lastPageNumber="187" masterDocId="E3577B66FFD35670BC530A03DF6FFFB4" masterDocTitle="Further studies on the species diversity of the marine planktonic diatom genus Skeletonema (Bacillariophyta) in the Mexican Pacific" masterLastPageNumber="196" masterPageNumber="182" pageNumber="187" updateTime="1691940695684" updateUser="ExternalLinkService" zenodo-license-figures="UNSPECIFIED" zenodo-license-treatments="UNSPECIFIED">
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<mods:title id="2488EA2141C6FFD2CF1B7919D010DBD4">Further studies on the species diversity of the marine planktonic diatom genus Skeletonema (Bacillariophyta) in the Mexican Pacific</mods:title>
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<treatment id="1F6E031EFFD65675BCDB0ED5DB05F95C" ID-DOI="http://doi.org/10.5281/zenodo.8243243" ID-Zenodo-Dep="8243243" LSID="urn:lsid:plazi:treatment:1F6E031EFFD65675BCDB0ED5DB05F95C" httpUri="http://treatment.plazi.org/id/1F6E031EFFD65675BCDB0ED5DB05F95C" lastPageNumber="187" pageId="5" pageNumber="187">
<subSubSection id="DFDDE183FFD65675BCDB0ED5DC09FB44" box="[136,870,1238,1265]" pageId="5" pageNumber="187" type="nomenclature">
<paragraph id="9778B208FFD65675BCDB0ED5DC09FB44" blockId="5.[136,1451,1238,1372]" box="[136,870,1238,1265]" pageId="5" pageNumber="187">
<heading id="CC300564FFD65675BCDB0ED5DC09FB44" bold="true" box="[136,870,1238,1265]" fontSize="11" level="1" pageId="5" pageNumber="187" reason="1">
<taxonomicName id="50C7C98BFFD65675BCDB0ED5DC09FB44" authority="Medlin emend. Zingone et Sarno" authorityName="Zingone et Sarno" box="[136,870,1238,1265]" class="Coscinodiscophyceae" family="Skeletonemaceae" genus="Skeletonema" higherTaxonomySource="GBIF" kingdom="Chromista" order="Thalassiosirales" pageId="5" pageNumber="187" phylum="Ochrophyta" rank="species" species="pseudocostatum">
<emphasis id="A5B36E1AFFD65675BCDB0ED5DC09FB44" bold="true" box="[136,870,1238,1265]" pageId="5" pageNumber="187">
<emphasis id="A5B36E1AFFD65675BCDB0ED5DEB3FB45" bold="true" box="[136,476,1238,1265]" italics="true" pageId="5" pageNumber="187">Skeletonema pseudocostatum</emphasis>
Medlin
<emphasis id="A5B36E1AFFD65675BE130ED5DDE3FB45" bold="true" box="[576,652,1238,1265]" italics="true" pageId="5" pageNumber="187">emend</emphasis>
. Zingone
<emphasis id="A5B36E1AFFD65675BF500ED4DC78FB45" bold="true" box="[771,791,1239,1265]" italics="true" pageId="5" pageNumber="187">et</emphasis>
Sarno
</emphasis>
</taxonomicName>
</heading>
</paragraph>
</subSubSection>
<subSubSection id="DFDDE183FFD65675BCDB0EF9DB05F95C" pageId="5" pageNumber="187" type="description">
<paragraph id="9778B208FFD65675BCDB0EF9DE6AFAA0" blockId="5.[136,1451,1238,1372]" box="[136,261,1274,1300]" pageId="5" pageNumber="187">
<figureCitation id="0FFCAE8DFFD65675BCDB0EF9DE6AFAA0" box="[136,261,1274,1300]" captionStart="FIGURES 18–22" captionStartId="7.[136,248,1670,1692]" captionTargetBox="[163,1424,197,1637]" captionTargetId="figure-29@7.[151,1436,190,1646]" captionTargetPageId="7" captionText="FIGURES 18–22. Skeletonema pseudocostatum, LM (18) and SEM (19–22). Fig. 18. A complete chain with 9 cells, one cell is dividing (arrow). Fig. 19. Broken chain with 4 cells in development. Fig. 20. Terminal part of a chain, with fusion of the IF’s, including 1:1 and 1:2 junctions. Fig. 21. Two terminal valves with relative high valve mantle and TF’s showing the characteristic spines of their tips (small arrows) and a TR (arrow). Fig. 22. A terminal valve showing the areolae on the face, TF’s and TR (arrow)." figureDoi="http://doi.org/10.5281/zenodo.8243277" httpUri="https://zenodo.org/record/8243277/files/figure.png" pageId="5" pageNumber="187">Figs 18–22</figureCitation>
</paragraph>
<paragraph id="9778B208FFD65675BCDB0F21DAC4FA83" blockId="5.[136,1451,1238,1372]" box="[136,1451,1314,1336]" pageId="5" pageNumber="187">
References:
<bibRefCitation id="F356CFF9FFD65675BCAC0F21DEDEFA83" author="Medlin, L. K. &amp; Elwood, H. J. &amp; Stickel, S. &amp; Sogin, ML" box="[255,433,1314,1336]" pageId="5" pageNumber="187" pagination="514 - 524" refId="ref8606" refString="Medlin, L. K., Elwood, H. J., Stickel, S. &amp; Sogin, ML. (1991) Morphological and genetic variation within the diatom Skeletonema costatum Bacillariophyta: evidence for a new species Skeletonema pseudocostatum. Journal of Phycology 27: 514 - 524. https: // doi. org / 10.1111 / j. 0022 - 3646.1991.00514. x" type="journal article" year="1991">
Medlin
<emphasis id="A5B36E1AFFD65675BD190F21DE1BFA83" box="[330,372,1314,1335]" italics="true" pageId="5" pageNumber="187">et al</emphasis>
. 1991
</bibRefCitation>
, p. 522;
<bibRefCitation id="F356CFF9FFD65675BE500F21DDC7FA8C" author="Sarno, D. &amp; Kooistra, W. H. C. F. &amp; Medlin, L. &amp; Percopo, I. &amp; Zingone, A." box="[515,680,1314,1336]" pageId="5" pageNumber="187" pagination="151 - 176" refId="ref8779" refString="Sarno, D., Kooistra, W. H. C. F., Medlin, L., Percopo, I. &amp; Zingone, A. (2005) Diversity in the genus Skeletonema (Bacillariophyceae). II. An assessment of the taxonomy of S. costatum - like species with the description of four new species. Journal of Phycology 41: 151 - 176. https: // doi. org / 10.1111 / j. 1529 - 8817.2005.04067. x" type="journal article" year="2005">
Sarno
<emphasis id="A5B36E1AFFD65675BE120F21DD04FA83" box="[577,619,1314,1335]" italics="true" pageId="5" pageNumber="187">et al</emphasis>
. 2005
</bibRefCitation>
, p. 162, figs 7, A–I;
<bibRefCitation id="F356CFF9FFD65675BF380F21DC99FA83" author="Gu, H. &amp; Zhang, X. &amp; Sun, J. &amp; Luo, Z." box="[875,1014,1314,1335]" pageId="5" pageNumber="187" pagination="245 - 263" refId="ref7757" refString="Gu, H., Zhang, X., Sun, J. &amp; Luo, Z. (2012) Diversity and seasonal occurrence of Skeletonema (Bacillariophyta) species in Xiamen Harbour and surrounding seas, China. Cryptogamie Algology 33: 245 - 263. https: // doi. org / 10.7872 / crya. v 33. iss 3.2012.245" type="journal article" year="2012">
Gu
<emphasis id="A5B36E1AFFD65675BFDD0F21DCD7FA83" box="[910,952,1314,1335]" italics="true" pageId="5" pageNumber="187">et al</emphasis>
. 2012
</bibRefCitation>
, p. 254, figs 21–23;
<bibRefCitation id="F356CFF9FFD65675B8EA0F21DAC4FA83" author="Hernandez-Becerril, D. U. &amp; Baron-Campis, S. A. &amp; Salazar-Paredes, J. &amp; Alonso-Rodriguez, R." box="[1209,1451,1314,1336]" pageId="5" pageNumber="187" pagination="77 - 87" refId="ref7984" refString="Hernandez-Becerril, D. U., Baron-Campis, S. A., Salazar-Paredes, J. &amp; Alonso-Rodriguez, R. (2013) Species of the planktonic diatom genus Skeletonema (Bacillariophyta) from the Mexican Pacific Ocean. Cryptogamie Algologie 34: 77 - 87. https: // doi. org / 10.7872 / crya. v 34. iss 2.2013.77" type="journal article" year="2013">
Hernández-Becerril
<emphasis id="A5B36E1AFFD65675B92F0F21DAC9FA83" box="[1404,1446,1314,1335]" italics="true" pageId="5" pageNumber="187">et al</emphasis>
.
</bibRefCitation>
</paragraph>
<paragraph id="9778B208FFD65675BCEE0F45DECDFAE8" blockId="5.[136,1451,1238,1372]" box="[189,418,1350,1372]" pageId="5" pageNumber="187">2013, p. 81, figs 16–25.</paragraph>
<paragraph id="9778B208FFD65675BCDB0F89DD45F980" blockId="5.[136,1452,1418,1769]" pageId="5" pageNumber="187">
Description: Chains are relatively long and straight (slightly curved), with 4–9 cells per chain (
<figureCitation id="0FFCAE8DFFD65675B8F00F89DA4CFA10" box="[1187,1315,1418,1444]" captionStart="FIGURES 18–22" captionStartId="7.[136,248,1670,1692]" captionTargetBox="[163,1424,197,1637]" captionTargetId="figure-29@7.[151,1436,190,1646]" captionTargetPageId="7" captionText="FIGURES 18–22. Skeletonema pseudocostatum, LM (18) and SEM (19–22). Fig. 18. A complete chain with 9 cells, one cell is dividing (arrow). Fig. 19. Broken chain with 4 cells in development. Fig. 20. Terminal part of a chain, with fusion of the IF’s, including 1:1 and 1:2 junctions. Fig. 21. Two terminal valves with relative high valve mantle and TF’s showing the characteristic spines of their tips (small arrows) and a TR (arrow). Fig. 22. A terminal valve showing the areolae on the face, TF’s and TR (arrow)." figureDoi="http://doi.org/10.5281/zenodo.8243277" httpUri="https://zenodo.org/record/8243277/files/figure.png" pageId="5" pageNumber="187">Figs 18, 19</figureCitation>
). Cells have two chloroplasts (
<figureCitation id="0FFCAE8DFFD65675BD070FADDEC6FA7C" box="[340,425,1454,1480]" captionStart="FIGURES 18–22" captionStartId="7.[136,248,1670,1692]" captionTargetBox="[163,1424,197,1637]" captionTargetId="figure-29@7.[151,1436,190,1646]" captionTargetPageId="7" captionText="FIGURES 18–22. Skeletonema pseudocostatum, LM (18) and SEM (19–22). Fig. 18. A complete chain with 9 cells, one cell is dividing (arrow). Fig. 19. Broken chain with 4 cells in development. Fig. 20. Terminal part of a chain, with fusion of the IF’s, including 1:1 and 1:2 junctions. Fig. 21. Two terminal valves with relative high valve mantle and TF’s showing the characteristic spines of their tips (small arrows) and a TR (arrow). Fig. 22. A terminal valve showing the areolae on the face, TF’s and TR (arrow)." figureDoi="http://doi.org/10.5281/zenodo.8243277" httpUri="https://zenodo.org/record/8243277/files/figure.png" pageId="5" pageNumber="187">Fig. 18</figureCitation>
). The valves are flat to slightly convex, with a relatively high valve mantle (
<figureCitation id="0FFCAE8DFFD65675B9490FADDAF0FA7C" box="[1306,1439,1454,1480]" captionStart="FIGURES 18–22" captionStartId="7.[136,248,1670,1692]" captionTargetBox="[163,1424,197,1637]" captionTargetId="figure-29@7.[151,1436,190,1646]" captionTargetPageId="7" captionText="FIGURES 18–22. Skeletonema pseudocostatum, LM (18) and SEM (19–22). Fig. 18. A complete chain with 9 cells, one cell is dividing (arrow). Fig. 19. Broken chain with 4 cells in development. Fig. 20. Terminal part of a chain, with fusion of the IF’s, including 1:1 and 1:2 junctions. Fig. 21. Two terminal valves with relative high valve mantle and TF’s showing the characteristic spines of their tips (small arrows) and a TR (arrow). Fig. 22. A terminal valve showing the areolae on the face, TF’s and TR (arrow)." figureDoi="http://doi.org/10.5281/zenodo.8243277" httpUri="https://zenodo.org/record/8243277/files/figure.png" pageId="5" pageNumber="187">Figs 19–21</figureCitation>
). The areolae are almost quadrangular to rectangular on the valve face and become pseudoloculate near the mantle (
<figureCitation id="0FFCAE8DFFD65675B9290FD1DFBCF9A4" captionStart="FIGURES 18–22" captionStartId="7.[136,248,1670,1692]" captionTargetBox="[163,1424,197,1637]" captionTargetId="figure-29@7.[151,1436,190,1646]" captionTargetPageId="7" captionText="FIGURES 18–22. Skeletonema pseudocostatum, LM (18) and SEM (19–22). Fig. 18. A complete chain with 9 cells, one cell is dividing (arrow). Fig. 19. Broken chain with 4 cells in development. Fig. 20. Terminal part of a chain, with fusion of the IF’s, including 1:1 and 1:2 junctions. Fig. 21. Two terminal valves with relative high valve mantle and TF’s showing the characteristic spines of their tips (small arrows) and a TR (arrow). Fig. 22. A terminal valve showing the areolae on the face, TF’s and TR (arrow)." figureDoi="http://doi.org/10.5281/zenodo.8243277" httpUri="https://zenodo.org/record/8243277/files/figure.png" pageId="5" pageNumber="187">Figs 20–22</figureCitation>
). Apart from the observations of the valvocopula, with longitudinal elongate poroids and ribs (
<figureCitation id="0FFCAE8DFFD65675B9490FF5DAF0F9A4" box="[1306,1439,1526,1552]" captionStart="FIGURES 18–22" captionStartId="7.[136,248,1670,1692]" captionTargetBox="[163,1424,197,1637]" captionTargetId="figure-29@7.[151,1436,190,1646]" captionTargetPageId="7" captionText="FIGURES 18–22. Skeletonema pseudocostatum, LM (18) and SEM (19–22). Fig. 18. A complete chain with 9 cells, one cell is dividing (arrow). Fig. 19. Broken chain with 4 cells in development. Fig. 20. Terminal part of a chain, with fusion of the IF’s, including 1:1 and 1:2 junctions. Fig. 21. Two terminal valves with relative high valve mantle and TF’s showing the characteristic spines of their tips (small arrows) and a TR (arrow). Fig. 22. A terminal valve showing the areolae on the face, TF’s and TR (arrow)." figureDoi="http://doi.org/10.5281/zenodo.8243277" httpUri="https://zenodo.org/record/8243277/files/figure.png" pageId="5" pageNumber="187">Figs 20–22</figureCitation>
), other copulae were not seen in detail.
</paragraph>
<paragraph id="9778B208FFD65675BCEE0C3DDB93F970" blockId="5.[136,1452,1418,1769]" pageId="5" pageNumber="187">
All fultoportulae are open (
<figureCitation id="0FFCAE8DFFD65675BDB80C3DDD05F9EC" box="[491,618,1598,1624]" captionStart="FIGURES 18–22" captionStartId="7.[136,248,1670,1692]" captionTargetBox="[163,1424,197,1637]" captionTargetId="figure-29@7.[151,1436,190,1646]" captionTargetPageId="7" captionText="FIGURES 18–22. Skeletonema pseudocostatum, LM (18) and SEM (19–22). Fig. 18. A complete chain with 9 cells, one cell is dividing (arrow). Fig. 19. Broken chain with 4 cells in development. Fig. 20. Terminal part of a chain, with fusion of the IF’s, including 1:1 and 1:2 junctions. Fig. 21. Two terminal valves with relative high valve mantle and TF’s showing the characteristic spines of their tips (small arrows) and a TR (arrow). Fig. 22. A terminal valve showing the areolae on the face, TF’s and TR (arrow)." figureDoi="http://doi.org/10.5281/zenodo.8243277" httpUri="https://zenodo.org/record/8243277/files/figure.png" pageId="5" pageNumber="187">Figs 20, 21</figureCitation>
), although some IF’s and TF’s have their bases closed and are more tubular (
<figureCitation id="0FFCAE8DFFD65675BCC30C61DE7CF9C8" box="[144,275,1634,1660]" captionStart="FIGURES 18–22" captionStartId="7.[136,248,1670,1692]" captionTargetBox="[163,1424,197,1637]" captionTargetId="figure-29@7.[151,1436,190,1646]" captionTargetPageId="7" captionText="FIGURES 18–22. Skeletonema pseudocostatum, LM (18) and SEM (19–22). Fig. 18. A complete chain with 9 cells, one cell is dividing (arrow). Fig. 19. Broken chain with 4 cells in development. Fig. 20. Terminal part of a chain, with fusion of the IF’s, including 1:1 and 1:2 junctions. Fig. 21. Two terminal valves with relative high valve mantle and TF’s showing the characteristic spines of their tips (small arrows) and a TR (arrow). Fig. 22. A terminal valve showing the areolae on the face, TF’s and TR (arrow)." figureDoi="http://doi.org/10.5281/zenodo.8243277" httpUri="https://zenodo.org/record/8243277/files/figure.png" pageId="5" pageNumber="187">Figs 20, 22</figureCitation>
), and the tips of TF’s have a long, very characteristic spine (
<figureCitation id="0FFCAE8DFFD65675BFEE0C61DB60F9C8" box="[957,1039,1634,1660]" captionStart="FIGURES 18–22" captionStartId="7.[136,248,1670,1692]" captionTargetBox="[163,1424,197,1637]" captionTargetId="figure-29@7.[151,1436,190,1646]" captionTargetPageId="7" captionText="FIGURES 18–22. Skeletonema pseudocostatum, LM (18) and SEM (19–22). Fig. 18. A complete chain with 9 cells, one cell is dividing (arrow). Fig. 19. Broken chain with 4 cells in development. Fig. 20. Terminal part of a chain, with fusion of the IF’s, including 1:1 and 1:2 junctions. Fig. 21. Two terminal valves with relative high valve mantle and TF’s showing the characteristic spines of their tips (small arrows) and a TR (arrow). Fig. 22. A terminal valve showing the areolae on the face, TF’s and TR (arrow)." figureDoi="http://doi.org/10.5281/zenodo.8243277" httpUri="https://zenodo.org/record/8243277/files/figure.png" pageId="5" pageNumber="187">Fig. 21</figureCitation>
, small arrows). Each IF fuses to one or, less commonly, two of the sibling valves (
<figureCitation id="0FFCAE8DFFD65675BED20C85DC6BF914" box="[641,772,1670,1696]" captionStart="FIGURES 18–22" captionStartId="7.[136,248,1670,1692]" captionTargetBox="[163,1424,197,1637]" captionTargetId="figure-29@7.[151,1436,190,1646]" captionTargetPageId="7" captionText="FIGURES 18–22. Skeletonema pseudocostatum, LM (18) and SEM (19–22). Fig. 18. A complete chain with 9 cells, one cell is dividing (arrow). Fig. 19. Broken chain with 4 cells in development. Fig. 20. Terminal part of a chain, with fusion of the IF’s, including 1:1 and 1:2 junctions. Fig. 21. Two terminal valves with relative high valve mantle and TF’s showing the characteristic spines of their tips (small arrows) and a TR (arrow). Fig. 22. A terminal valve showing the areolae on the face, TF’s and TR (arrow)." figureDoi="http://doi.org/10.5281/zenodo.8243277" httpUri="https://zenodo.org/record/8243277/files/figure.png" pageId="5" pageNumber="187">Figs 19, 20</figureCitation>
). Terminal rimoportula locates close to the margin, and has a long tube, with a slightly inflated tip (
<figureCitation id="0FFCAE8DFFD65675BE7C0CA9DDDEF970" box="[559,689,1706,1732]" captionStart="FIGURES 18–22" captionStartId="7.[136,248,1670,1692]" captionTargetBox="[163,1424,197,1637]" captionTargetId="figure-29@7.[151,1436,190,1646]" captionTargetPageId="7" captionText="FIGURES 18–22. Skeletonema pseudocostatum, LM (18) and SEM (19–22). Fig. 18. A complete chain with 9 cells, one cell is dividing (arrow). Fig. 19. Broken chain with 4 cells in development. Fig. 20. Terminal part of a chain, with fusion of the IF’s, including 1:1 and 1:2 junctions. Fig. 21. Two terminal valves with relative high valve mantle and TF’s showing the characteristic spines of their tips (small arrows) and a TR (arrow). Fig. 22. A terminal valve showing the areolae on the face, TF’s and TR (arrow)." figureDoi="http://doi.org/10.5281/zenodo.8243277" httpUri="https://zenodo.org/record/8243277/files/figure.png" pageId="5" pageNumber="187">Figs 21, 22</figureCitation>
, arrows), whereas the IR is marginal, but very short.
</paragraph>
<paragraph id="9778B208FFD65675BCEE0CCCDB05F95C" blockId="5.[136,1452,1418,1769]" box="[189,1130,1742,1769]" pageId="5" pageNumber="187">
Measurements: cell diameter 6.4–9.2 μm, areolae density
<quantity id="503F1FEDFFD65675BF160CCDDCC7F95C" box="[837,936,1742,1768]" metricMagnitude="-1" metricUnit="m" metricValue="9.271" metricValueMax="10.16" metricValueMin="8.382" pageId="5" pageNumber="187" unit="in" value="36.5" valueMax="40.0" valueMin="33.0">33–40 in</quantity>
10 μm (
<tableCitation id="DA4587B3FFD65675B8560CCDDB36F95C" box="[1029,1113,1742,1768]" captionStart="TABLE 1" captionStartId="2.[137,230,159,183]" captionText="TABLE 1. Morphological characters and morphometric data of the Skeletonema species identified in this work from the Mexican Pacific Ocean. 1Gu et al. (2012), 2Bužančić et al. (2017), 3Zingone et al. (2005), 4Sarno et al. (2005), 5Hernández- Becerril et al. (2013), 6Jung et al. (2009), 7Sarno et al. (2007), 8Liu et al. (2012)" pageId="5" pageNumber="187">Table 1</tableCitation>
).
</paragraph>
</subSubSection>
</treatment>
</document>
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