137 lines
29 KiB
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137 lines
29 KiB
XML
<document id="D66BB439C1D25644A55C26EB1A0ED003" ID-DOI="10.11646/phytotaxa.314.1.1" ID-ISSN="1179-3163" ID-Zenodo-Dep="13700770" 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.treatmentCitations_approvedBy="felipe" IM.treatments_approvedBy="felipe" checkinTime="1725575392568" checkinUser="felipe" docAuthor="Bosak, Sunčica & Sarno, Diana" docDate="2017" docId="038587FE5165FFC66AE5FF56D8E3FD61" docLanguage="en" docName="phytotaxa.314.1.1.pdf" docOrigin="Phytotaxa 314 (1)" docSource="http://dx.doi.org/10.11646/phytotaxa.314.1.1" docStyle="DocumentStyle:96748F8F1B6C902996E134952A3A36B9.13:Phytotaxa.2014-.journal_article" docStyleId="96748F8F1B6C902996E134952A3A36B9" docStyleName="Phytotaxa.2014-.journal_article" docStyleVersion="13" docTitle="Chaetoceros tortissimus Gran 1900" docType="treatment" docVersion="2" lastPageNumber="35" masterDocId="FFBCFF865144FFE46A6DFFCBDD70FFEC" masterDocTitle="The planktonic diatom genus Chaetoceros Ehrenberg (Bacillariophyta) from the Adriatic Sea" masterLastPageNumber="44" masterPageNumber="1" pageNumber="34" updateTime="1725585328926" updateUser="ExternalLinkService" zenodo-license-figures="UNSPECIFIED" zenodo-license-treatments="UNSPECIFIED">
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<mods:title id="59C5396C3BB14FB8636ACCEF5AD77252">The planktonic diatom genus Chaetoceros Ehrenberg (Bacillariophyta) from the Adriatic Sea</mods:title>
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<mods:namePart id="1A53FCA39E93A63995A91310B3A863A0">Bosak, Sunčica</mods:namePart>
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<mods:affiliation id="EE77DBA3307B5DFAAFF7D3EC89A169A1">University of Zagreb, Faculty of Science, Department of Biology, Rooseveltov trg 6, HR- 10000 Zagreb, Croatia</mods:affiliation>
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<mods:namePart id="F8DC073554E874D7EB9707C05B93F227">Sarno, Diana</mods:namePart>
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<mods:affiliation id="9E06E1C8E35EA501121208F6A8693D77">Stazione Zoologica Anton Dohrn, Department of Integrative Marine Ecology, Villa Comunale, 80121 Naples, Italy</mods:affiliation>
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<mods:title id="B44E782D75C3B39938BD1F80ABD39066">Phytotaxa</mods:title>
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<mods:date id="DBE449D1ABC75D2D334D8C6F08C91CBB">2017</mods:date>
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<subSubSection id="C33665635165FFC56AE5FF56DE69FF54" box="[136,793,157,184]" pageId="33" pageNumber="34" type="nomenclature">
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<paragraph id="8B9336E85165FFC56AE5FF56DE69FF54" blockId="33.[136,793,157,184]" box="[136,793,157,184]" pageId="33" pageNumber="34">
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<heading id="D0DB81845165FFC56AE5FF56DE69FF54" box="[136,793,157,184]" fontSize="11" level="2" pageId="33" pageNumber="34" reason="3">
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<treatmentCitationGroup id="AB3C11C65165FFC56AE5FF56DE69FF54" box="[136,793,157,184]" pageId="33" pageNumber="34">
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<treatmentCitation id="0A8D10F95165FFC56AE5FF56DF16FF54" author="Gran, H. H." box="[136,614,157,184]" page=")" pageId="33" pageNumber="34" year="1900">
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<taxonomicName id="4C2C4D6B5165FFC56AE5FF56DF16FF54" ID-CoL="TB8K" authority="Gran (1900: 122)" authorityName="Gran" authorityPageNumber="122" authorityYear="1900" box="[136,614,157,184]" class="Bacillariophyceae" family="Chaetocerotaceae" genus="Chaetoceros" kingdom="Chromista" order="Chaetocerotales" pageId="33" pageNumber="34" phylum="Ochrophyta" rank="species" species="tortissimus">
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<emphasis id="B958EAFA5165FFC56AE5FF56DCECFF54" bold="true" box="[136,412,157,184]" italics="true" pageId="33" pageNumber="34">Chaetoceros tortissimus</emphasis>
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<bibRefCitation id="EFBD4B195165FFC56BCEFF54DF16FF54" author="Gran, H. H." box="[419,614,159,184]" pageId="33" pageNumber="34" pagination="102 - 128" refId="ref26698" refString="Gran, H. H. (1900) Bemerkungen uber einige Planktondiatomeen. Nytt Magasin for Naturvidenskapene 38: 102 - 128." type="journal article" year="1900">Gran (1900: 122)</bibRefCitation>
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</taxonomicName>
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</treatmentCitation>
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(
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<figureCitation id="13172A6D5165FFC56819FF54DE61FF54" box="[628,785,159,184]" captionStart="FIGURES 173–182" captionStartId="33.[136,243,1595,1616]" captionTargetBox="[151,1436,245,1570]" captionTargetId="figure-38@33.[151,1436,245,1570]" captionTargetPageId="33" captionText="FIGURES 173–182. Chaetoceros tortissimus. Figs 174–175, 178: field material. Figs 173, 176–177, 179–182: culture material, strain PMFT1. Figs 173–176: LM. Figs 177–178, 181–182: TEM. Figs: 179–180: SEM. 173) Complete chain with a slight torsion showing orientation of the setae. 174) Complete chain composed of cells with short pervalvar size strongly twisted around the chain axis. 175) Middle part of a chain showing hexagonal apertures. 176) Intercalary cells with one parietal plate-like chloroplast positioned around the girdle. 177) Detail of the valve face with network of costae some ending in round spots (arrow). 178) Two overlapping sibling valves showing the valve ornamentation and the elongated pores near the bases of the setae (arrows). 179) Sibling valves with the elongated pores (arrows). 180) Detail of the proximal part of the seta with the large elongated pore. 181) Detail of the girdle band. 182) Detail of a seta. Scale bars: 173–175=20 μm; 176=10 μm; 178, 179=5 μm; 177=2 μm; 180–182=0.5 μm." figureDoi="http://doi.org/10.5281/zenodo.13700812" httpUri="https://zenodo.org/record/13700812/files/figure.png" pageId="33" pageNumber="34">Figs 173–182</figureCitation>
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)
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</treatmentCitationGroup>
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</heading>
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</paragraph>
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</subSubSection>
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<subSubSection id="C33665635165FFC66AE5FF0DD8E3FD61" lastPageId="34" lastPageNumber="35" pageId="33" pageNumber="34" type="reference_group">
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<paragraph id="8B9336E85165FFC56AE5FF0DD9DAFF37" blockId="33.[136,1194,198,219]" box="[136,1194,198,219]" pageId="33" pageNumber="34">
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<emphasis id="B958EAFA5165FFC56AE5FF0DDD87FF37" bold="true" box="[136,247,198,219]" pageId="33" pageNumber="34">References</emphasis>
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:—
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<bibRefCitation id="EFBD4B195165FFC56B79FF0DDCFCFF37" author="Ikari, J." box="[276,396,198,219]" pageId="33" pageNumber="34" pagination="517 - 534" refId="ref27650" refString="Ikari, J. (1926) On some Chaetoceras of Japan. I. Botanical Magazine, Tokyo 40: 517 - 534. https: // doi. org / 10.15281 / jplantres 1887.40.517" type="journal article" year="1926">Ikari (1926)</bibRefCitation>
|
||
,
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||
<bibRefCitation id="EFBD4B195165FFC56BFBFF0DDF58FF37" author="Hustedt, F." box="[406,552,198,219]" pageId="33" pageNumber="34" refId="ref27612" refString="Hustedt, F. (1930) Die Kieselalgen Deutschlands, Osterrreichs und der Schweiz under Berucksichtigung der ubrigen Lander Europas sowie der angrenzenden Meeresgebiete. 1. Teil. Akademische Verlaggesellschaft, Leipzig, 920 pp." type="book" year="1930">Hustedt (1930)</bibRefCitation>
|
||
,
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||
<bibRefCitation id="EFBD4B195165FFC5685FFF0DDFDEFF37" author="Cupp, E. E." box="[562,686,198,219]" pageId="33" pageNumber="34" pagination="1 - 237" refId="ref26235" refString="Cupp, E. E. (1943) Marine plankton diatoms of the west coast of north America. Bulletin of the Scripps Institution of Oceanography Technical series 5: 1 - 237." type="book chapter" year="1943">Cupp (1943)</bibRefCitation>
|
||
,
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||
<bibRefCitation id="EFBD4B195165FFC568D5FF0DDED8FF37" author="Hoppenrath, M. & Elbrachter, M. & Drebes, G." box="[696,936,198,219]" pageId="33" pageNumber="34" refId="ref27565" refString="Hoppenrath, M., Elbrachter, M. & Drebes, G. (2009) Marine Phytoplankton: Selected microphytoplankton species from the North Sea around Helgoland and Sylt. Kleine Serckenerg - Reihe 49, Schweitzerbart Science Publishers, Stuttgart, 264 pp." type="book" year="2009">
|
||
Hoppenrath
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||
<emphasis id="B958EAFA5165FFC56942FF0DDE2AFF37" box="[815,858,198,219]" italics="true" pageId="33" pageNumber="34">et al</emphasis>
|
||
. (2009)
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||
</bibRefCitation>
|
||
,
|
||
<bibRefCitation id="EFBD4B195165FFC569DCFF0DD9D6FF37" author="Shevchenko, O. G. & Orlova, T. Y. & Hernandez-Becerril, D. U." box="[945,1190,198,219]" pageId="33" pageNumber="34" pagination="236 - 258" refId="ref29826" refString="Shevchenko, O. G., Orlova, T. Y. & Hernandez-Becerril, D. U. (2006) The genus Chaetoceros (Bacillariophyta) from Peter the Great Bay, Sea of Japan. Botanica Marina 49: 236 - 258. https: // doi. org / 10.1515 / BOT. 2006.028" type="journal article" year="2006">
|
||
Shevchenko
|
||
<emphasis id="B958EAFA5165FFC56E40FF0DD927FF37" box="[1069,1111,198,219]" italics="true" pageId="33" pageNumber="34">et al</emphasis>
|
||
. (2006)
|
||
</bibRefCitation>
|
||
.
|
||
</paragraph>
|
||
<caption id="DF5366605165FFC56AE5F9F0DEAEF8A0" ID-DOI="http://doi.org/10.5281/zenodo.13700812" ID-Zenodo-Dep="13700812" httpUri="https://zenodo.org/record/13700812/files/figure.png" pageId="33" pageNumber="34" startId="33.[136,243,1595,1616]" targetBox="[151,1436,245,1570]" targetPageId="33" targetType="figure">
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||
<paragraph id="8B9336E85165FFC56AE5F9F0DEAEF8A0" blockId="33.[136,1452,1595,1868]" pageId="33" pageNumber="34">
|
||
<emphasis id="B958EAFA5165FFC56AE5F9F0DC24F9BC" bold="true" box="[136,340,1595,1616]" pageId="33" pageNumber="34">FIGURES 173–182.</emphasis>
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||
<emphasis id="B958EAFA5165FFC56B31F9F0DF3DF9BC" box="[348,589,1595,1616]" italics="true" pageId="33" pageNumber="34">
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||
<taxonomicName id="4C2C4D6B5165FFC56B31F9F0DF38F9BC" authorityName="Gran" authorityYear="1900" box="[348,584,1595,1616]" class="Bacillariophyceae" family="Chaetocerotaceae" genus="Chaetoceros" kingdom="Chromista" order="Chaetocerotales" pageId="33" pageNumber="34" phylum="Ochrophyta" rank="species" species="tortissimus">Chaetoceros tortissimus</taxonomicName>
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||
.
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||
</emphasis>
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||
Figs 174–175, 178: field material. Figs 173, 176–177, 179–182: culture material, strain PMFT1. Figs 173–176: LM. Figs 177–178, 181–182: TEM. Figs: 179–180: SEM. 173) Complete chain with a slight torsion showing orientation of the setae. 174) Complete chain composed of cells with short pervalvar size strongly twisted around the chain axis. 175) Middle part of a chain showing hexagonal apertures. 176) Intercalary cells with one parietal plate-like chloroplast positioned around the girdle. 177) Detail of the valve face with network of costae some ending in round spots (arrow). 178) Two overlapping sibling valves showing the valve ornamentation and the elongated pores near the bases of the setae (arrows). 179) Sibling valves with the elongated pores (arrows). 180) Detail of the proximal part of the seta with the large elongated pore. 181) Detail of the girdle band. 182) Detail of a seta. Scale bars: 173–175=20 μm; 176=10 μm; 178, 179=5 μm; 177=2 μm; 180–182=0.5 μm.
|
||
</paragraph>
|
||
</caption>
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||
<paragraph id="8B9336E85165FFC56AE5F8B7DFC2F879" blockId="33.[136,1452,1916,2085]" box="[136,690,1916,1941]" pageId="33" pageNumber="34">
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||
<emphasis id="B958EAFA5165FFC56AE5F8B7DC4BF879" bold="true" box="[136,315,1916,1941]" pageId="33" pageNumber="34">Morphometry:</emphasis>
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||
—a.a.: 14–21 μm; p.a.: 5–14 μm.
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||
</paragraph>
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||
<paragraph id="8B9336E85165FFC66AD0F86BD9EBFE81" blockId="33.[136,1452,1916,2085]" lastBlockId="34.[136,1452,160,653]" lastPageId="34" lastPageNumber="35" pageId="33" pageNumber="34">
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<emphasis id="B958EAFA5165FFC56AD0F86BDD84F855" bold="true" box="[189,244,1952,1977]" pageId="33" pageNumber="34">LM:</emphasis>
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||
—Cells are united in usually long chains that are very strongly twisted around the chain axis in such a way that some sibling valves position themselves perpendicular to each other (
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||
<figureCitation id="13172A6D5165FFC5698AF80FD9FAF831" box="[999,1162,1988,2013]" captionStart="FIGURES 173–182" captionStartId="33.[136,243,1595,1616]" captionTargetBox="[151,1436,245,1570]" captionTargetId="figure-38@33.[151,1436,245,1570]" captionTargetPageId="33" captionText="FIGURES 173–182. Chaetoceros tortissimus. Figs 174–175, 178: field material. Figs 173, 176–177, 179–182: culture material, strain PMFT1. Figs 173–176: LM. Figs 177–178, 181–182: TEM. Figs: 179–180: SEM. 173) Complete chain with a slight torsion showing orientation of the setae. 174) Complete chain composed of cells with short pervalvar size strongly twisted around the chain axis. 175) Middle part of a chain showing hexagonal apertures. 176) Intercalary cells with one parietal plate-like chloroplast positioned around the girdle. 177) Detail of the valve face with network of costae some ending in round spots (arrow). 178) Two overlapping sibling valves showing the valve ornamentation and the elongated pores near the bases of the setae (arrows). 179) Sibling valves with the elongated pores (arrows). 180) Detail of the proximal part of the seta with the large elongated pore. 181) Detail of the girdle band. 182) Detail of a seta. Scale bars: 173–175=20 μm; 176=10 μm; 178, 179=5 μm; 177=2 μm; 180–182=0.5 μm." figureDoi="http://doi.org/10.5281/zenodo.13700812" httpUri="https://zenodo.org/record/13700812/files/figure.png" pageId="33" pageNumber="34">Figs 173–175</figureCitation>
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). In valve view cells are broadly elliptical and compressed in the transapical direction, in girdle view they are rectangular with rounded valve corners. Each cell contains a single parietal plate-like chloroplast positioned around the girdle (
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<figureCitation id="13172A6D5165FFC56EAEF7C7D857F7C9" box="[1219,1319,2060,2085]" captionStart="FIGURES 173–182" captionStartId="33.[136,243,1595,1616]" captionTargetBox="[151,1436,245,1570]" captionTargetId="figure-38@33.[151,1436,245,1570]" captionTargetPageId="33" captionText="FIGURES 173–182. Chaetoceros tortissimus. Figs 174–175, 178: field material. Figs 173, 176–177, 179–182: culture material, strain PMFT1. Figs 173–176: LM. Figs 177–178, 181–182: TEM. Figs: 179–180: SEM. 173) Complete chain with a slight torsion showing orientation of the setae. 174) Complete chain composed of cells with short pervalvar size strongly twisted around the chain axis. 175) Middle part of a chain showing hexagonal apertures. 176) Intercalary cells with one parietal plate-like chloroplast positioned around the girdle. 177) Detail of the valve face with network of costae some ending in round spots (arrow). 178) Two overlapping sibling valves showing the valve ornamentation and the elongated pores near the bases of the setae (arrows). 179) Sibling valves with the elongated pores (arrows). 180) Detail of the proximal part of the seta with the large elongated pore. 181) Detail of the girdle band. 182) Detail of a seta. Scale bars: 173–175=20 μm; 176=10 μm; 178, 179=5 μm; 177=2 μm; 180–182=0.5 μm." figureDoi="http://doi.org/10.5281/zenodo.13700812" httpUri="https://zenodo.org/record/13700812/files/figure.png" pageId="33" pageNumber="34">Fig. 176</figureCitation>
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). The valve face is flat or slightly convex; the mantle is low and sometimes constricted near the margin, girdle equidimensional or higher than the mantle. Long and thin setae originate within the valve margin and slightly direct outwards forming a short basal part, and then cross slightly inside or at the chain margin (
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<figureCitation id="13172A6D5166FFC669DDFF23D963FEED" box="[944,1043,232,257]" captionStart="FIGURES 173–182" captionStartId="33.[136,243,1595,1616]" captionTargetBox="[151,1436,245,1570]" captionTargetId="figure-38@33.[151,1436,245,1570]" captionTargetPageId="33" captionText="FIGURES 173–182. Chaetoceros tortissimus. Figs 174–175, 178: field material. Figs 173, 176–177, 179–182: culture material, strain PMFT1. Figs 173–176: LM. Figs 177–178, 181–182: TEM. Figs: 179–180: SEM. 173) Complete chain with a slight torsion showing orientation of the setae. 174) Complete chain composed of cells with short pervalvar size strongly twisted around the chain axis. 175) Middle part of a chain showing hexagonal apertures. 176) Intercalary cells with one parietal plate-like chloroplast positioned around the girdle. 177) Detail of the valve face with network of costae some ending in round spots (arrow). 178) Two overlapping sibling valves showing the valve ornamentation and the elongated pores near the bases of the setae (arrows). 179) Sibling valves with the elongated pores (arrows). 180) Detail of the proximal part of the seta with the large elongated pore. 181) Detail of the girdle band. 182) Detail of a seta. Scale bars: 173–175=20 μm; 176=10 μm; 178, 179=5 μm; 177=2 μm; 180–182=0.5 μm." figureDoi="http://doi.org/10.5281/zenodo.13700812" httpUri="https://zenodo.org/record/13700812/files/figure.png" pageId="34" pageNumber="35">Fig. 175</figureCitation>
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). Apertures are hexagonally shaped. Intercalary setae are generally oriented more or less perpendicularly to the chain axis or appear slightly curved (
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<figureCitation id="13172A6D5166FFC66F13FEC7DDC6FEA5" captionStart="FIGURES 173–182" captionStartId="33.[136,243,1595,1616]" captionTargetBox="[151,1436,245,1570]" captionTargetId="figure-38@33.[151,1436,245,1570]" captionTargetPageId="33" captionText="FIGURES 173–182. Chaetoceros tortissimus. Figs 174–175, 178: field material. Figs 173, 176–177, 179–182: culture material, strain PMFT1. Figs 173–176: LM. Figs 177–178, 181–182: TEM. Figs: 179–180: SEM. 173) Complete chain with a slight torsion showing orientation of the setae. 174) Complete chain composed of cells with short pervalvar size strongly twisted around the chain axis. 175) Middle part of a chain showing hexagonal apertures. 176) Intercalary cells with one parietal plate-like chloroplast positioned around the girdle. 177) Detail of the valve face with network of costae some ending in round spots (arrow). 178) Two overlapping sibling valves showing the valve ornamentation and the elongated pores near the bases of the setae (arrows). 179) Sibling valves with the elongated pores (arrows). 180) Detail of the proximal part of the seta with the large elongated pore. 181) Detail of the girdle band. 182) Detail of a seta. Scale bars: 173–175=20 μm; 176=10 μm; 178, 179=5 μm; 177=2 μm; 180–182=0.5 μm." figureDoi="http://doi.org/10.5281/zenodo.13700812" httpUri="https://zenodo.org/record/13700812/files/figure.png" pageId="34" pageNumber="35">Fig. 173</figureCitation>
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). In valve view they diverge at an equal angle (30–45°) from the apical plane. Terminal setae are thick like the intercalary ones and extend almost parallel to the colony axis in a U-shaped curve (
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<figureCitation id="13172A6D5166FFC66E41FE9FD9FFFE81" box="[1068,1167,340,365]" captionStart="FIGURES 173–182" captionStartId="33.[136,243,1595,1616]" captionTargetBox="[151,1436,245,1570]" captionTargetId="figure-38@33.[151,1436,245,1570]" captionTargetPageId="33" captionText="FIGURES 173–182. Chaetoceros tortissimus. Figs 174–175, 178: field material. Figs 173, 176–177, 179–182: culture material, strain PMFT1. Figs 173–176: LM. Figs 177–178, 181–182: TEM. Figs: 179–180: SEM. 173) Complete chain with a slight torsion showing orientation of the setae. 174) Complete chain composed of cells with short pervalvar size strongly twisted around the chain axis. 175) Middle part of a chain showing hexagonal apertures. 176) Intercalary cells with one parietal plate-like chloroplast positioned around the girdle. 177) Detail of the valve face with network of costae some ending in round spots (arrow). 178) Two overlapping sibling valves showing the valve ornamentation and the elongated pores near the bases of the setae (arrows). 179) Sibling valves with the elongated pores (arrows). 180) Detail of the proximal part of the seta with the large elongated pore. 181) Detail of the girdle band. 182) Detail of a seta. Scale bars: 173–175=20 μm; 176=10 μm; 178, 179=5 μm; 177=2 μm; 180–182=0.5 μm." figureDoi="http://doi.org/10.5281/zenodo.13700812" httpUri="https://zenodo.org/record/13700812/files/figure.png" pageId="34" pageNumber="35">Fig. 173</figureCitation>
|
||
).
|
||
</paragraph>
|
||
<paragraph id="8B9336E85166FFC66AD0FEB3DE3FFD85" blockId="34.[136,1452,160,653]" pageId="34" pageNumber="35">
|
||
<emphasis id="B958EAFA5166FFC66AD0FEB3DD84FE7D" bold="true" box="[189,244,376,401]" pageId="34" pageNumber="35">EM:</emphasis>
|
||
—The valve has a central hyaline annulus from which extends a complex pattern of densely distributed costae, branching dichotomously towards the valve margin, sometimes forming small dots (
|
||
<figureCitation id="13172A6D5166FFC66E47FE57D9B7FE59" box="[1066,1223,412,437]" captionStart="FIGURES 173–182" captionStartId="33.[136,243,1595,1616]" captionTargetBox="[151,1436,245,1570]" captionTargetId="figure-38@33.[151,1436,245,1570]" captionTargetPageId="33" captionText="FIGURES 173–182. Chaetoceros tortissimus. Figs 174–175, 178: field material. Figs 173, 176–177, 179–182: culture material, strain PMFT1. Figs 173–176: LM. Figs 177–178, 181–182: TEM. Figs: 179–180: SEM. 173) Complete chain with a slight torsion showing orientation of the setae. 174) Complete chain composed of cells with short pervalvar size strongly twisted around the chain axis. 175) Middle part of a chain showing hexagonal apertures. 176) Intercalary cells with one parietal plate-like chloroplast positioned around the girdle. 177) Detail of the valve face with network of costae some ending in round spots (arrow). 178) Two overlapping sibling valves showing the valve ornamentation and the elongated pores near the bases of the setae (arrows). 179) Sibling valves with the elongated pores (arrows). 180) Detail of the proximal part of the seta with the large elongated pore. 181) Detail of the girdle band. 182) Detail of a seta. Scale bars: 173–175=20 μm; 176=10 μm; 178, 179=5 μm; 177=2 μm; 180–182=0.5 μm." figureDoi="http://doi.org/10.5281/zenodo.13700812" httpUri="https://zenodo.org/record/13700812/files/figure.png" pageId="34" pageNumber="35">Figs 177, 178</figureCitation>
|
||
). The marginal ridge does not have a prominent rim; it is only observable as a thickened edge between the valve face and the mantle. Girdle bands are adorned with transverse fine costae and a slightly thickened longitudinal rib near one edge (
|
||
<figureCitation id="13172A6D5166FFC66F4DFE2FD8F4FE11" box="[1312,1412,484,509]" captionStart="FIGURES 173–182" captionStartId="33.[136,243,1595,1616]" captionTargetBox="[151,1436,245,1570]" captionTargetId="figure-38@33.[151,1436,245,1570]" captionTargetPageId="33" captionText="FIGURES 173–182. Chaetoceros tortissimus. Figs 174–175, 178: field material. Figs 173, 176–177, 179–182: culture material, strain PMFT1. Figs 173–176: LM. Figs 177–178, 181–182: TEM. Figs: 179–180: SEM. 173) Complete chain with a slight torsion showing orientation of the setae. 174) Complete chain composed of cells with short pervalvar size strongly twisted around the chain axis. 175) Middle part of a chain showing hexagonal apertures. 176) Intercalary cells with one parietal plate-like chloroplast positioned around the girdle. 177) Detail of the valve face with network of costae some ending in round spots (arrow). 178) Two overlapping sibling valves showing the valve ornamentation and the elongated pores near the bases of the setae (arrows). 179) Sibling valves with the elongated pores (arrows). 180) Detail of the proximal part of the seta with the large elongated pore. 181) Detail of the girdle band. 182) Detail of a seta. Scale bars: 173–175=20 μm; 176=10 μm; 178, 179=5 μm; 177=2 μm; 180–182=0.5 μm." figureDoi="http://doi.org/10.5281/zenodo.13700812" httpUri="https://zenodo.org/record/13700812/files/figure.png" pageId="34" pageNumber="35">Fig. 181</figureCitation>
|
||
). A conspicuous character found in this species is the presence of a large elongated pore on the proximal part of the setae, right after the crossing point (
|
||
<figureCitation id="13172A6D5166FFC66BB1FDE7DF0DFDA9" box="[476,637,556,581]" captionStart="FIGURES 173–182" captionStartId="33.[136,243,1595,1616]" captionTargetBox="[151,1436,245,1570]" captionTargetId="figure-38@33.[151,1436,245,1570]" captionTargetPageId="33" captionText="FIGURES 173–182. Chaetoceros tortissimus. Figs 174–175, 178: field material. Figs 173, 176–177, 179–182: culture material, strain PMFT1. Figs 173–176: LM. Figs 177–178, 181–182: TEM. Figs: 179–180: SEM. 173) Complete chain with a slight torsion showing orientation of the setae. 174) Complete chain composed of cells with short pervalvar size strongly twisted around the chain axis. 175) Middle part of a chain showing hexagonal apertures. 176) Intercalary cells with one parietal plate-like chloroplast positioned around the girdle. 177) Detail of the valve face with network of costae some ending in round spots (arrow). 178) Two overlapping sibling valves showing the valve ornamentation and the elongated pores near the bases of the setae (arrows). 179) Sibling valves with the elongated pores (arrows). 180) Detail of the proximal part of the seta with the large elongated pore. 181) Detail of the girdle band. 182) Detail of a seta. Scale bars: 173–175=20 μm; 176=10 μm; 178, 179=5 μm; 177=2 μm; 180–182=0.5 μm." figureDoi="http://doi.org/10.5281/zenodo.13700812" httpUri="https://zenodo.org/record/13700812/files/figure.png" pageId="34" pageNumber="35">Figs 178–180</figureCitation>
|
||
). Setae are circular in cross-section, ornamented with very small spines and poroids spirally positioned along the seta length (
|
||
<figureCitation id="13172A6D5166FFC6688DFD9BDE32FD85" box="[736,834,592,617]" captionStart="FIGURES 173–182" captionStartId="33.[136,243,1595,1616]" captionTargetBox="[151,1436,245,1570]" captionTargetId="figure-38@33.[151,1436,245,1570]" captionTargetPageId="33" captionText="FIGURES 173–182. Chaetoceros tortissimus. Figs 174–175, 178: field material. Figs 173, 176–177, 179–182: culture material, strain PMFT1. Figs 173–176: LM. Figs 177–178, 181–182: TEM. Figs: 179–180: SEM. 173) Complete chain with a slight torsion showing orientation of the setae. 174) Complete chain composed of cells with short pervalvar size strongly twisted around the chain axis. 175) Middle part of a chain showing hexagonal apertures. 176) Intercalary cells with one parietal plate-like chloroplast positioned around the girdle. 177) Detail of the valve face with network of costae some ending in round spots (arrow). 178) Two overlapping sibling valves showing the valve ornamentation and the elongated pores near the bases of the setae (arrows). 179) Sibling valves with the elongated pores (arrows). 180) Detail of the proximal part of the seta with the large elongated pore. 181) Detail of the girdle band. 182) Detail of a seta. Scale bars: 173–175=20 μm; 176=10 μm; 178, 179=5 μm; 177=2 μm; 180–182=0.5 μm." figureDoi="http://doi.org/10.5281/zenodo.13700812" httpUri="https://zenodo.org/record/13700812/files/figure.png" pageId="34" pageNumber="35">Fig. 182</figureCitation>
|
||
).
|
||
</paragraph>
|
||
<paragraph id="8B9336E85166FFC66AD0FDBFD8E3FD61" blockId="34.[136,1452,160,653]" box="[189,1427,628,653]" pageId="34" pageNumber="35">
|
||
<emphasis id="B958EAFA5166FFC66AD0FDBFDCDDFD61" bold="true" box="[189,429,628,653]" pageId="34" pageNumber="35">Distinctive features:</emphasis>
|
||
—Very strong torsion of the chain. Large elongated pore on the proximal part of the seta.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |