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<document id="B952A1BA67358D7D8AA79AC0C1745D04" ID="10.11646/zootaxa.4276.4.5SLASH11351" ID-CLB-Dataset="32843" ID-DOI="10.11646/zootaxa.4276.4.5" ID-GBIF-Dataset="df72204a-b552-46fb-91b4-002b7c6fbd27" ID-ISSN="1175-5326" ID-Zenodo-Dep="807971" ID-ZooBank="C79C5489-8068-4AD1-B2C1-AF2FD201DD1D" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1497426708316" checkinUser="plazi" docAuthor="Monniot, Françoise &amp; López-Legentil, Susanna" docDate="2017" docId="D02201375E03D10C35AD8367820738E7" docLanguage="en" docName="zootaxa.4276.4.5SLASH11351.pdf" docOrigin="Zootaxa 4276 (4)" docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article" docStyleId="647186512141C8FC8976D5BCC54AEB7D" docStyleName="Zootaxa.2013-.journal_article" docStyleVersion="9" docTitle="Octacnemus bythius Moseley 1876" docType="treatment" docVersion="7" lastPageNumber="536" masterDocId="2C1B794F5E06D10B353A8426813C3A4F" masterDocTitle="Deep-sea ascidians from Papua New Guinea" masterLastPageNumber="538" masterPageNumber="529" pageNumber="534" updateTime="1698440508239" updateUser="ExternalLinkService">
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<mods:title id="D1F7BE9643172B998406C7D57FE0E592">Deep-sea ascidians from Papua New Guinea</mods:title>
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<mods:namePart id="55498BA164797EE675538C59CE932D03">Monniot, Françoise</mods:namePart>
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<mods:namePart id="A534AA7DD9378BB053A772CAC843E5C6">López-Legentil, Susanna</mods:namePart>
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<treatment id="D02201375E03D10C35AD8367820738E7" ID-DOI="http://doi.org/10.5281/zenodo.6000507" ID-GBIF-Taxon="131878151" ID-Zenodo-Dep="6000507" LSID="urn:lsid:plazi:treatment:D02201375E03D10C35AD8367820738E7" httpUri="http://treatment.plazi.org/id/D02201375E03D10C35AD8367820738E7" lastPageId="7" lastPageNumber="536" pageId="5" pageNumber="534">
<subSubSection id="1091E3AA5E03D10E35AD836780093DF3" pageId="5" pageNumber="534" type="nomenclature">
<paragraph id="5834B0215E03D10E35AD8367837D3D14" blockId="5.[151,577,1857,1883]" box="[151,577,1857,1883]" pageId="5" pageNumber="534">
<heading id="037C074D5E03D10E35AD8367837D3D14" bold="true" box="[151,577,1857,1883]" fontSize="11" level="1" pageId="5" pageNumber="534" reason="1">
<taxonomicName id="9F8BCBA25E03D10E35AD8367837D3D14" authority="Moseley, 1876" authorityName="Moseley" authorityYear="1876" box="[151,577,1857,1883]" class="Ascidiacea" family="Octacnemidae" genus="Octacnemus" kingdom="Animalia" order="Enterogona" pageId="5" pageNumber="534" phylum="Chordata" rank="species" species="bythius">
<emphasis id="6AFF6C335E03D10E35AD8367837D3D14" bold="true" box="[151,577,1857,1883]" pageId="5" pageNumber="534">
<emphasis id="6AFF6C335E03D10E35AD836780B03D14" bold="true" box="[151,396,1857,1883]" italics="true" pageId="5" pageNumber="534">Octacnemus bythius</emphasis>
Moseley, 1876
</emphasis>
</taxonomicName>
</heading>
</paragraph>
<paragraph id="5834B0215E03D10E35AD83AE80093DF3" blockId="5.[151,480,1928,2011]" pageId="5" pageNumber="534">Moseley, 1876, 2°33S144°4E Herdman, 1888</paragraph>
</subSubSection>
<subSubSection id="1091E3AA5E03D10C35AD83E3820738E7" lastPageId="7" lastPageNumber="536" pageId="5" pageNumber="534" type="description">
<paragraph id="5834B0215E03D10E35AD83E380923D94" blockId="5.[151,480,1928,2011]" box="[151,430,1989,2011]" pageId="5" pageNumber="534">Millar, 1959 and synonymy</paragraph>
<paragraph id="5834B0215E00D10D35AD84BE83493AE1" blockId="6.[151,666,152,204]" box="[151,629,152,174]" pageId="6" pageNumber="535">
<bibRef id="812B24D75E00D10D35AD84BE83493AE1" box="[151,629,152,174]" pageId="6" pageNumber="535" type="book">
<author id="803658C45E00D10D35AD84BE80393AE1" box="[151,261,152,174]" fns="I" npo="LF" pageId="6" pageNumber="535">Monniot C</author>
&amp;
<author id="803658C45E00D10D341F84BE80AD3AE1" box="[293,401,152,174]" fns="I" npo="LF" pageId="6" pageNumber="535">Monniot F</author>
,
<year id="2C23F1725E00D10D34A684BE80F23AE1" box="[412,462,152,174]" pageId="6" pageNumber="535">1991</year>
<title id="2A8F5B175E00D10D34F484BE83493AE1" box="[462,629,152,174]" pageId="6" pageNumber="535">b and synonymy</title>
</bibRef>
</paragraph>
<paragraph id="5834B0215E00D10C35AD849080D13BC7" blockId="6.[151,666,152,204]" lastBlockId="7.[151,1437,151,680]" lastPageId="7" lastPageNumber="536" pageId="6" pageNumber="535">
<materialsCitation id="E8E3BA7C5E00D10C35AD849080D13BC7" ID-GBIF-Occurrence="1563874488" collectingDate="1919-10-06" collectorName="Station CP" lastPageId="7" lastPageNumber="536" location="MNHN" pageId="6" pageNumber="535" specimenCount="1" stateProvince="MNHN">
<collectorName id="F57ED5F75E00D10D35AD8490803F3A83" box="[151,259,182,204]" pageId="6" pageNumber="535">Station CP</collectorName>
4435,
<specimenCount id="4E8D7BA85E00D10D3473849080803A83" box="[329,444,182,204]" pageId="6" pageNumber="535" type="generic">1 specimen</specimenCount>
(
<collectingRegion id="9A4F7EC35E00D10D34F3849083243A83" box="[457,536,182,204]" country="Ireland" name="Monaghan" pageId="6" pageNumber="535">MNHN</collectingRegion>
P
<date id="2C3596E15E00D10D3717849083AE3A83" box="[557,658,182,204]" pageId="6" pageNumber="535" value="1919-10-06">
<collectingDate id="3C716F095E00D10D3717849083AE3A83" box="[557,658,182,204]" pageId="6" pageNumber="535" value="1919-10-06">6 OCT 19</collectingDate>
</date>
) The single specimen collected during the KAVIENG expedition has the same star-like morphology (
<figureCitation id="C0B0ACA45E00D10D303C828684773CF6" box="[1286,1355,1696,1721]" captionStart="FIGURE 4" captionStartId="6.[151,250,1605,1627]" captionTargetBox="[151,1432,257,1583]" captionTargetId="figure@6.[151,1436,257,1583]" captionTargetPageId="6" captionText="FIGURE 4. Octacnemus bythius. A, A body with and without tunic, dorsal side. B, B oral side with and without tunic. Scale bar 1 cm." httpUri="https://zenodo.org/record/807979/files/figure.png" pageId="6" pageNumber="535">Fig. 4</figureCitation>
) as the specimen-type collected from the same region. The distance between opposite oral lobes measures
<quantity id="9F731DC45E00D10D301982E2845E3C93" box="[1315,1378,1732,1757]" metricMagnitude="-2" metricUnit="m" metricValue="6.0" pageId="6" pageNumber="535" unit="cm" value="6.0">6 cm</quantity>
. The vitreous tunic is very thin and smooth. The oral lobes are triangular with a pointed tip and no lateral denticles. At the base of each lobe on the oral side there are round vesicles (
<figureCitation id="C0B0ACA45E00D10D3663832A82A23D6A" box="[857,926,1804,1829]" captionStart="FIGURE 4" captionStartId="6.[151,250,1605,1627]" captionTargetBox="[151,1432,257,1583]" captionTargetId="figure@6.[151,1436,257,1583]" captionTargetPageId="6" captionText="FIGURE 4. Octacnemus bythius. A, A body with and without tunic, dorsal side. B, B oral side with and without tunic. Scale bar 1 cm." httpUri="https://zenodo.org/record/807979/files/figure.png" pageId="6" pageNumber="535">Fig. 4</figureCitation>
B). These vesicles appear to be prolongations of the tunic since no trace of them remains when the tunic is removed (
<figureCitation id="C0B0ACA45E00D10D368F831682C73D06" box="[949,1019,1840,1865]" captionStart="FIGURE 4" captionStartId="6.[151,250,1605,1627]" captionTargetBox="[151,1432,257,1583]" captionTargetId="figure@6.[151,1436,257,1583]" captionTargetPageId="6" captionText="FIGURE 4. Octacnemus bythius. A, A body with and without tunic, dorsal side. B, B oral side with and without tunic. Scale bar 1 cm." httpUri="https://zenodo.org/record/807979/files/figure.png" pageId="6" pageNumber="535">Fig. 4</figureCitation>
B). The musculature is typical of the genus, with circular fibres around the base of the oral lobes gathered by radial ribbons at regular intervals. These ribbons spread laterally and internally drawing arcs that connect with each other (
<figureCitation id="C0B0ACA45E00D10D3162835E85A93DDE" box="[1112,1173,1912,1937]" captionStart="FIGURE 4" captionStartId="6.[151,250,1605,1627]" captionTargetBox="[151,1432,257,1583]" captionTargetId="figure@6.[151,1436,257,1583]" captionTargetPageId="6" captionText="FIGURE 4. Octacnemus bythius. A, A body with and without tunic, dorsal side. B, B oral side with and without tunic. Scale bar 1 cm." httpUri="https://zenodo.org/record/807979/files/figure.png" pageId="6" pageNumber="535">Fig.4</figureCitation>
A, B). A strong, fanshaped muscle lies at the posterior side of the mouth and some muscular bundles are also present at the dorsal side of the aperture, behind the neural ganglion. A sphincter closes the mouth opening. The neural ganglion is close to the oral sphincter, giving two lateral nerves on each side. A small neural gland is associated with the ganglion. There is no branchial sac. The pharyngeal pouch is lined by a wrinkled tissue pierced in the bottom right by a simple small hole. The pharyngeal tissue is raised forming a ridge close to the ganglion and may either be a dorsal lamina or a contraction artefact. The oesophagus opens at the left side of the pharynx pouch. The shape of the gut is indistinct. Male and female gonads are tightly attached to the gut. The body wall around the abdomen is particularly thin and apparently devoid of muscles. A narrow atrial cavity along the rectum opens into a hole close to the posterior part of the gut.
</materialsCitation>
</paragraph>
<caption id="0CF4E0A95E00D10D35AD826381CC3C36" httpUri="https://zenodo.org/record/807979/files/figure.png" pageId="6" pageNumber="535" targetBox="[151,1432,257,1583]" targetPageId="6">
<paragraph id="5834B0215E00D10D35AD826381CC3C36" blockId="6.[151,1436,1604,1657]" pageId="6" pageNumber="535">
<emphasis id="6AFF6C335E00D10D35AD8263802F3C15" bold="true" box="[151,275,1605,1627]" pageId="6" pageNumber="535">FIGURE 4.</emphasis>
<taxonomicName id="9F8BCBA25E00D10D3420826380DA3C15" authorityName="Moseley" authorityYear="1876" box="[282,486,1604,1626]" class="Ascidiacea" family="Octacnemidae" genus="Octacnemus" kingdom="Animalia" order="Enterogona" pageId="6" pageNumber="535" phylum="Chordata" rank="species" species="bythius">
<emphasis id="6AFF6C335E00D10D3420826380DA3C15" box="[282,486,1604,1626]" italics="true" pageId="6" pageNumber="535">Octacnemus bythius</emphasis>
</taxonomicName>
. A, A body with and without tunic, dorsal side. B, B oral side with and without tunic. Scale bar 1cm.
</paragraph>
</caption>
<paragraph id="5834B0215E01D10C35FD85B3820738E7" blockId="7.[151,1437,151,680]" pageId="7" pageNumber="536">
<taxonomicName id="9F8BCBA25E01D10C35FD85B380973BE2" authorityName="Moseley" authorityYear="1876" box="[199,427,404,429]" class="Ascidiacea" family="Octacnemidae" genus="Octacnemus" kingdom="Animalia" order="Enterogona" pageId="7" pageNumber="536" phylum="Chordata" rank="species" species="bythius">
<emphasis id="6AFF6C335E01D10C35FD85B380973BE2" box="[199,427,404,429]" italics="true" pageId="7" pageNumber="536">Octacnemus bythius</emphasis>
</taxonomicName>
differs from the Atlantic
<taxonomicName id="9F8BCBA25E01D10C37EE85B385953BE3" authority="Monniot C &amp; Monniot F, 1984" authorityName="Monniot C &amp; Monniot F" authorityYear="1984" box="[724,1193,404,429]" class="Ascidiacea" family="Octacnemidae" genus="Octacnemus" kingdom="Animalia" order="Enterogona" pageId="7" pageNumber="536" phylum="Chordata" rank="species" species="zarcoi">
<emphasis id="6AFF6C335E01D10C37EE85B382013BE3" box="[724,829,405,428]" italics="true" pageId="7" pageNumber="536">O. zarcoi</emphasis>
Monniot C &amp; Monniot F,
<quantity id="9F731DC45E01D10C314B85B285953BE3" box="[1137,1193,404,428]" metricMagnitude="1" metricUnit="m" metricValue="5.03936" pageId="7" pageNumber="536" unit="in" value="1984.0">1984</quantity>
</taxonomicName>
in that
<taxonomicName id="9F8BCBA25E01D10C303E85B384523BE3" authorityName="Monniot C &amp; Monniot F" authorityYear="1984" box="[1284,1390,405,428]" class="Ascidiacea" family="Octacnemidae" genus="Octacnemus" kingdom="Animalia" order="Enterogona" pageId="7" pageNumber="536" phylum="Chordata" rank="species" species="zarcoi">
<emphasis id="6AFF6C335E01D10C303E85B384523BE3" box="[1284,1390,405,428]" italics="true" pageId="7" pageNumber="536">O. zarcoi</emphasis>
</taxonomicName>
has unequal oral lobes and a muscular oral siphon.
<taxonomicName id="9F8BCBA25E01D10C3794859E85403B9F" authority="Monniot C &amp; Monniot F, 1985" authorityName="Monniot C. &amp; Monniot F." authorityYear="1985" box="[686,1148,439,464]" class="Ascidiacea" family="Octacnemidae" genus="Octacnemus" kingdom="Animalia" order="Enterogona" pageId="7" pageNumber="536" phylum="Chordata" rank="species" species="alatus">
<emphasis id="6AFF6C335E01D10C3794859E822A3B9F" box="[686,790,439,464]" italics="true" pageId="7" pageNumber="536">O. alatus</emphasis>
Monniot C &amp; Monniot F, 1985
</taxonomicName>
from the southern Indian Ocean has two large oral lobes that look like wings.
<taxonomicName id="9F8BCBA25E01D10C361885FB84643BBB" authority="Sanamyan &amp; Sanamyan, 1999" authorityName="Sanamyan &amp; Sanamyan" authorityYear="1999" box="[802,1368,476,501]" class="Ascidiacea" family="Octacnemidae" genus="Octacnemus" kingdom="Animalia" order="Enterogona" pageId="7" pageNumber="536" phylum="Chordata" rank="species" species="vinogradovae">
<emphasis id="6AFF6C335E01D10C361885FB82D83BBA" box="[802,996,476,501]" italics="true" pageId="7" pageNumber="536">O. vinogradovae</emphasis>
Sanamyan &amp; Sanamyan, 1999
</taxonomicName>
from
<collectingCountry id="209CF0B15E01D10C35AD85D980673857" box="[151,347,511,536]" name="Australia" pageId="7" pageNumber="536">Macquarie Island</collectingCountry>
has the same albeit smaller oral lobes than
<taxonomicName id="9F8BCBA25E01D10C3674862682FF3857" authorityName="Moseley" authorityYear="1876" box="[846,963,511,536]" class="Ascidiacea" family="Octacnemidae" genus="Octacnemus" kingdom="Animalia" order="Enterogona" pageId="7" pageNumber="536" phylum="Chordata" rank="species" species="bythius">
<emphasis id="6AFF6C335E01D10C3674862682FF3857" box="[846,963,511,536]" italics="true" pageId="7" pageNumber="536">O. bythius</emphasis>
</taxonomicName>
. However,
<taxonomicName id="9F8BCBA25E01D10C317D862685803857" authorityName="Moseley" authorityYear="1876" box="[1095,1212,511,536]" class="Ascidiacea" family="Octacnemidae" genus="Octacnemus" kingdom="Animalia" order="Enterogona" pageId="7" pageNumber="536" phylum="Chordata" rank="species" species="bythius">
<emphasis id="6AFF6C335E01D10C317D862685803857" box="[1095,1212,511,536]" italics="true" pageId="7" pageNumber="536">O. bythius</emphasis>
</taxonomicName>
has a pharynx with longitudinal vessels and branchial perforations.
<taxonomicName id="9F8BCBA25E01D10C378D860385433873" authority="Sanamyan &amp; Sanamyan, 2002" authorityName="Sanamyan, K.E. &amp; N.P. Sanamyan" authorityYear="2002" box="[695,1151,548,573]" class="Ascidiacea" family="Octacnemidae" genus="Octacnemus" kingdom="Animalia" order="Enterogona" pageId="7" pageNumber="536" phylum="Chordata" rank="species" species="kottae">
<emphasis id="6AFF6C335E01D10C378D860382233872" box="[695,799,548,573]" italics="true" pageId="7" pageNumber="536">O. kottae</emphasis>
Sanamyan &amp; Sanamyan, 2002
</taxonomicName>
has pinnate oral lobes, a pedunculate abdomen and a pharynx that is entirely perforated.
<taxonomicName id="9F8BCBA25E01D10C3665866E8553382F" authority="Madsen, 1947" authorityName="Madsen" authorityYear="1947" box="[863,1135,583,608]" class="Ascidiacea" family="Octacnemidae" genus="Octacnemus" kingdom="Animalia" order="Enterogona" pageId="7" pageNumber="536" phylum="Chordata" rank="species" species="ingolfi">
<emphasis id="6AFF6C335E01D10C3665866E82F6382F" box="[863,970,583,608]" italics="true" pageId="7" pageNumber="536">O. ingolfi</emphasis>
Madsen, 1947
</taxonomicName>
from the northern Atlantic has pinnate oral lobes and a long posterior appendage. The branchial sac of this species is also entirely perforated. All members of the genus
<taxonomicName id="9F8BCBA25E01D10C348586B6837538E8" authorityName="Moseley" authorityYear="1877" box="[447,585,656,679]" class="Ascidiacea" family="Octacnemidae" genus="Octacnemus" kingdom="Animalia" order="Enterogona" pageId="7" pageNumber="536" phylum="Chordata" rank="genus">
<emphasis id="6AFF6C335E01D10C348586B6837538E8" box="[447,585,656,679]" italics="true" pageId="7" pageNumber="536">Octacnemus</emphasis>
</taxonomicName>
are deep-sea species.
</paragraph>
</subSubSection>
</treatment>
</document>