204 lines
21 KiB
XML
204 lines
21 KiB
XML
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<mods:title id="9FD03E692BD2D3F9063E7DD0A6771793">Abyssal ascidians (Chordata, Tunicata) from the Weddell Sea, Antarctica, including a new Styela species and stomach content identifications</mods:title>
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<mods:affiliation id="1A0E384DDCA4333E9FB2EAEF8E829D1D">Department of Environmental Science, Stockholm University, 10691 Stockholm, Sweden. https: // orcid. org / 0000 - 0002 - 0332 - 3978</mods:affiliation>
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<treatment id="0075879CFFB0FF88FF09800F4386FCE0" ID-DOI="http://doi.org/10.5281/zenodo.5909845" ID-GBIF-Taxon="192662328" ID-Zenodo-Dep="5909845" LSID="urn:lsid:plazi:treatment:0075879CFFB0FF88FF09800F4386FCE0" httpUri="http://treatment.plazi.org/id/0075879CFFB0FF88FF09800F4386FCE0" lastPageId="15" lastPageNumber="311" pageId="14" pageNumber="310">
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<taxonomicName id="4FDC4D09FFB0FF89FF09800F40FEFD39" ID-CoL="H496" authority="(Oka, 1913)" baseAuthorityName="Oka" baseAuthorityYear="1913" box="[151,501,618,645]" class="Ascidiacea" family="Molgulidae" genus="Asajirus" kingdom="Animalia" order="Stolidobranchia" pageId="14" pageNumber="310" phylum="Chordata" rank="species" species="indicus">
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<emphasis id="BAA8EA98FFB0FF89FF09800F40FEFD39" bold="true" box="[151,501,618,645]" pageId="14" pageNumber="310">
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<emphasis id="BAA8EA98FFB0FF89FF09800F4057FD38" bold="true" box="[151,348,618,645]" italics="true" pageId="14" pageNumber="310">Asajirus indicus</emphasis>
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(
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<bibRefCitation id="EC4D4B7BFFB0FF89FEF5800E40E6FD39" author="Oka, A." box="[363,493,618,644]" pageId="14" pageNumber="310" pagination="1 - 10" refId="ref12955" refString="Oka, A. (1913) Zur kenntnis der zwei aberranten Ascidien Gattungen Dicopia Sluit und Hexacrobylus Sluit. Zoologischer Anzeiger, 43, 1 - 10." type="journal article" year="1913">Oka, 1913</bibRefCitation>
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)
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<figureCitation id="10E72A0FFFB0FF89FF0980EB41FEFD14" box="[151,245,655,681]" captionStart="FIGURE 9" captionStartId="14.[151,250,1819,1843]" captionTargetBox="[162,1426,935,1794]" captionTargetId="figure-214@14.[162,1426,935,1794]" captionTargetPageId="14" captionText="FIGURE 9. Asajirus indicus." figureDoi="http://doi.org/10.5281/zenodo.5909851" httpUri="https://zenodo.org/record/5909851/files/figure.png" pageId="14" pageNumber="310">Figure 9</figureCitation>
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<treatmentCitation id="097D109BFFB0FF89FF0980B740F3FD56" author="Oka, A." box="[151,504,723,747]" page="6" pageId="14" pageNumber="310" year="1913">
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<taxonomicName id="4FDC4D09FFB0FF89FF0980B740F3FD56" ID-CoL="3LG66" authority="Oka 1913: 6" authorityName="Oka" authorityPageNumber="6" authorityYear="1913" box="[151,504,723,747]" class="Ascidiacea" family="Molgulidae" genus="Hexacrobylus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Stolidobranchia" pageId="14" pageNumber="310" phylum="Chordata" rank="species" species="indicus">
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<emphasis id="BAA8EA98FFB0FF89FF0980B74079FD56" box="[151,370,723,747]" italics="true" pageId="14" pageNumber="310">Hexacrobylus indicus</emphasis>
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<bibRefCitation id="EC4D4B7BFFB0FF89FEE780B740F3FD56" author="Oka, A." box="[377,504,723,747]" pageId="14" pageNumber="310" pagination="1 - 10" refId="ref12955" refString="Oka, A. (1913) Zur kenntnis der zwei aberranten Ascidien Gattungen Dicopia Sluit und Hexacrobylus Sluit. Zoologischer Anzeiger, 43, 1 - 10." type="journal article" year="1913">Oka 1913: 6</bibRefCitation>
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.
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</paragraph>
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<paragraph id="8863368AFFB0FF89FF0980964031FC94" blockId="14.[151,1437,723,839]" pageId="14" pageNumber="310">
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<treatmentCitation id="097D109BFFB0FF89FF098096431DFCB7" author="Kott, P." box="[151,534,754,778]" page="524" pageId="14" pageNumber="310" year="1989">
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<taxonomicName id="4FDC4D09FFB0FF89FF098096431DFCB7" ID-CoL="H496" authority=": Kott 1989: 521 - 524" authorityName=": Kott" authorityPageNumber="521 - 524" authorityYear="1989" box="[151,534,754,778]" class="Ascidiacea" family="Molgulidae" genus="Asajirus" kingdom="Animalia" order="Stolidobranchia" pageId="14" pageNumber="310" phylum="Chordata" rank="species" species="indicus">
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<emphasis id="BAA8EA98FFB0FF89FF0980964037FCB7" box="[151,316,754,778]" italics="true" pageId="14" pageNumber="310">Asajirus indicus</emphasis>
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:
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<bibRefCitation id="EC4D4B7BFFB0FF89FED48096431DFCB7" author="Kott, P." box="[330,534,754,778]" pageId="14" pageNumber="310" pagination="517 - 534" refId="ref11206" refString="Kott, P. (1989) The family Hexacrobylidae Seeliger, 1906 (Ascidiacea, Tunicata). Memoirs of the Queensland Museum, 27 (2), 517 - 534." type="journal article" year="1989">Kott 1989: 521-524</bibRefCitation>
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, fig. 1; Sanamyan K. & Sanamyan N. 2006: 339-342; fig. 19, and synonymy;
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<bibRefCitation id="EC4D4B7BFFB0FF89FAA48096403DFC94" author="Maggioni, T. & Taverna, A. & Reyna, P. & Alurralde, G. & Rimondino, C. & Tatian, M." pageId="14" pageNumber="310" pagination="1 - 28" refId="ref11544" refString="Maggioni, T., Taverna, A., Reyna, P., Alurralde, G., Rimondino, C. & Tatian, M. (2018) Deep-sea ascidians (Chordata, Tunicata) from the SW Atlantic: species richness with descriptions of two new species. Zootaxa, 4526 (1), 1 - 28. https: // doi. org / 10.11646 / zootaxa. 4526.1.1" type="journal article" year="2018">
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Maggioni
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<emphasis id="BAA8EA98FFB0FF89FF59817541FFFC95" box="[199,244,784,808]" italics="true" pageId="14" pageNumber="310">et al</emphasis>
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. 2018
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</bibRefCitation>
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.
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</paragraph>
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<taxonomicName id="4FDC4D09FFB0FF89FF09814B43F9FCFA" ID-CoL="3LG82" authority=": Monniot C. & Monniot F. 1990: 271" authorityName="Monniot C. & Monniot F." authorityPageNumber="271" authorityYear="1990" box="[151,754,815,839]" class="Ascidiacea" family="Molgulidae" genus="Hexadactylus" kingdom="Animalia" order="Stolidobranchia" pageId="14" pageNumber="310" phylum="Chordata" rank="species" species="indicus">
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<emphasis id="BAA8EA98FFB0FF89FF09814B407BFCFA" box="[151,368,815,839]" italics="true" pageId="14" pageNumber="310">Hexadactylus indicus</emphasis>
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: Monniot C. & Monniot F. 1990: 271
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</taxonomicName>
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, figs. 1I, 16.
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<emphasis id="BAA8EA98FFB0FF89FF0981114072FC32" bold="true" box="[151,377,885,911]" pageId="14" pageNumber="310">Material examined</emphasis>
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:
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,
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, station 7,
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,
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<date id="FC62104AFFB0FF89FCAB811142CFFC2D" box="[821,964,885,912]" pageId="14" pageNumber="310" value="2005-02-22">22 Feb 2005</date>
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,
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.
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|
||
<caption id="DCA36602FFB0FF89FF09857F40CEF88E" ID-DOI="http://doi.org/10.5281/zenodo.5909851" ID-Zenodo-Dep="5909851" box="[151,453,1819,1843]" httpUri="https://zenodo.org/record/5909851/files/figure.png" pageId="14" pageNumber="310" startId="14.[151,250,1819,1843]" targetBox="[162,1426,935,1794]" targetPageId="14">
|
||
<paragraph id="8863368AFFB0FF89FF09857F40CEF88E" blockId="14.[151,453,1819,1843]" box="[151,453,1819,1843]" pageId="14" pageNumber="310">
|
||
<emphasis id="BAA8EA98FFB0FF89FF09857F4018F88E" bold="true" box="[151,275,1819,1843]" pageId="14" pageNumber="310">FIGURE 9.</emphasis>
|
||
<taxonomicName id="4FDC4D09FFB0FF89FE87857F40CBF88E" authorityName=": Kott" authorityYear="1989" box="[281,448,1819,1843]" class="Ascidiacea" family="Molgulidae" genus="Asajirus" kingdom="Animalia" order="Stolidobranchia" pageId="14" pageNumber="310" phylum="Chordata" rank="species" species="indicus">Asajirus indicus</taxonomicName>
|
||
.
|
||
</paragraph>
|
||
</caption>
|
||
<subSubSection id="C0C66501FFB0FF88FF598505428AFCA9" lastPageId="15" lastPageNumber="311" pageId="14" pageNumber="310" type="description">
|
||
<paragraph id="8863368AFFB0FF88FF59850543B1FD70" blockId="14.[151,1437,1889,2024]" lastBlockId="15.[151,1437,151,861]" lastPageId="15" lastPageNumber="311" pageId="14" pageNumber="310">
|
||
<emphasis id="BAA8EA98FFB0FF89FF598505405AF8C6" bold="true" box="[199,337,1889,1915]" pageId="14" pageNumber="310">Description</emphasis>
|
||
. The only specimen collected measures
|
||
<quantity id="4F249B6FFFB0FF89FC8185054267F8C1" box="[799,876,1889,1916]" metricMagnitude="-2" metricUnit="m" metricValue="3.1" pageId="14" pageNumber="310" unit="cm" value="3.1">3.1 cm</quantity>
|
||
long and
|
||
<quantity id="4F249B6FFFB0FF89FC7E85054526F8C1" box="[992,1069,1889,1916]" metricMagnitude="-2" metricUnit="m" metricValue="2.3" pageId="14" pageNumber="310" unit="cm" value="2.3">2.3 cm</quantity>
|
||
wide. With the exception of the oral lobes, the rest of the tunic is completely covered by detritus and sand. The ventral side has short and thin projections. The tunic is transparent, thin and flexible except for the region that surrounds the oral siphon, where it becomes thicker. Surrounding the oral aperture there are six prominent oral lobes with pinnate borders, two of which are bigger than the remaining four. The atrial siphon, situated at approximately one fifth of the distance from the oral siphon, consists of a tiny, almost unnoticeable, hole. The oral siphon is innervated by a series of longitudinal and circular very well developed muscle fibers. The elongated atrial siphon is also innervated by a series of thinner longitudinal and circular muscle fibers. There are no oral tentacles. Instead, there is a thick muscle cap arranged transversely across the first section of the oral siphon, except for a small dorsal orifice that connects directly with a prominent esophagus. The neural ganglion has two pairs of anterior nerves and one thick posterior nerve that divides into two thinner ones. There are two longitudinal bands of ventral muscles that extend on each side of the mid ventral line of the body and join at the posterior end, and a series of thinner concentric circular fibers on each side of the mid-dorsal region of the body. The rest of the mantle is transparent and thin. The pharynx is short and has two circular perforations that connect with lateral pharyngeal chambers which, in turn, open to the atrial cavity. The stomach occupies the totality of the ventral region. It is connected with a big and plicated hepatic pouch situated over it through a short duct. The gut-loop is closed. The border of the anus has two lobes. The ovoid renal sac is situated ventrally, between the oral siphon and the gut. There is one gonad on each side of the body. The ovaries, tubular and slightly curved, are full of yellowish ovocytes. The gonoducts are short and open near the anus. The testicular follicles are composed of numerous whitish lobes at the distal ends of the ovaries. The sperm ducts are also short and open directly into the atrial cavity.
|
||
</paragraph>
|
||
<paragraph id="8863368AFFB1FF88FF5980B2428AFCA9" blockId="15.[151,1437,151,861]" pageId="15" pageNumber="311">
|
||
<emphasis id="BAA8EA98FFB1FF88FF5980B240AFFD4C" bold="true" box="[199,420,726,753]" pageId="15" pageNumber="311">Stomach contents.</emphasis>
|
||
In the stomach of this specimen we found: one fragment of a copepod (undet.); a head fragment of another copepod (undet.); and a Brachyura zoea larva.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="C0C66501FFB1FF88FF59817B4386FCE0" pageId="15" pageNumber="311" type="discussion">
|
||
<paragraph id="8863368AFFB1FF88FF59817B4386FCE0" blockId="15.[151,1437,151,861]" pageId="15" pageNumber="311">
|
||
<emphasis id="BAA8EA98FFB1FF88FF59817B4030FC84" bold="true" box="[199,315,799,825]" pageId="15" pageNumber="311">Remarks.</emphasis>
|
||
This is the first register of the species in the Weddell Sea.
|
||
<taxonomicName id="4FDC4D09FFB1FF88FC78817B4595FC84" authorityName=": Kott" authorityYear="1989" box="[998,1182,799,825]" class="Ascidiacea" family="Molgulidae" genus="Asajirus" kingdom="Animalia" order="Stolidobranchia" pageId="15" pageNumber="311" phylum="Chordata" rank="species" species="indicus">
|
||
<emphasis id="BAA8EA98FFB1FF88FC78817B4595FC84" box="[998,1182,799,825]" italics="true" pageId="15" pageNumber="311">Asajirus indicus</emphasis>
|
||
</taxonomicName>
|
||
has one of the largest known geographic ranges within
|
||
<taxonomicName id="4FDC4D09FFB1FF88FD9581274381FCE0" box="[523,650,835,861]" class="Ascidiacea" kingdom="Animalia" pageId="15" pageNumber="311" phylum="Chordata" rank="class">Ascidiacea</taxonomicName>
|
||
.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |