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<document id="C4AE5C3A3266B81E7A8DD3D1FA08C532" ID-CLB-Dataset="28347" ID-DOI="10.11646/zootaxa.4567.3.1" ID-GBIF-Dataset="47813581-d217-4a19-8848-a3e9cf2ddaf4" ID-ISSN="1175-5326" ID-Zenodo-Dep="2598945" ID-ZooBank="0AEFAF80-B001-4A18-88AC-5B6A189F6DCD" IM.bibliography_approvedBy="felipe" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.taxonomicNames_approvedBy="felipe" checkinTime="1553062614686" checkinUser="plazi" docAuthor="Staples, David A." docDate="2019" docId="03895C33291E4F15FF01F9C5FAF7FE99" docLanguage="en" docName="zootaxa.4567.3.1.pdf" docOrigin="Zootaxa 4567 (3)" docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article" docStyleId="647186512141C8FC8976D5BCC54AEB7D" docStyleName="Zootaxa.2013-.journal_article" docStyleVersion="9" docTitle="Sericosura Fry &amp; Hedgpeth 1969" docType="treatment" docVersion="8" lastPageNumber="419" masterDocId="FFB0244B29114F07FF96FFB2FF80FFFD" masterDocTitle="Pycnogonids (Arthropoda, Pycnogonida) from the Southwest Indian Ridge" masterLastPageNumber="449" masterPageNumber="401" pageNumber="416" updateTime="1698701998649" updateUser="ExternalLinkService">
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<mods:title id="B7897483CC4B224F19A77B4F0CFF57F1">Pycnogonids (Arthropoda, Pycnogonida) from the Southwest Indian Ridge</mods:title>
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<mods:namePart id="57AA645D3FA595DA3FDD5020ABB5D21D">Staples, David A.</mods:namePart>
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<mods:date id="A0A4E3EBBC38E8D0721F784FF7E2921A">2019</mods:date>
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<treatment id="03895C33291E4F15FF01F9C5FAF7FE99" ID-DOI="http://doi.org/10.5281/zenodo.5944888" ID-GBIF-Taxon="154435122" ID-Zenodo-Dep="5944888" LSID="urn:lsid:plazi:treatment:03895C33291E4F15FF01F9C5FAF7FE99" httpUri="http://treatment.plazi.org/id/03895C33291E4F15FF01F9C5FAF7FE99" lastPageId="18" lastPageNumber="419" pageId="15" pageNumber="416">
<subSubSection id="C33ABEAE291E4F08FF01F9C5FDB5F96C" box="[151,565,1655,1681]" pageId="15" pageNumber="416" type="nomenclature">
<paragraph id="8B9FED25291E4F08FF01F9C5FDB5F96C" blockId="15.[151,565,1655,1714]" box="[151,565,1655,1681]" pageId="15" pageNumber="416">
<heading id="D0D75A49291E4F08FF01F9C5FDB5F96C" bold="true" box="[151,565,1655,1681]" fontSize="11" level="1" pageId="15" pageNumber="416" reason="1">
<emphasis id="B9543137291E4F08FF01F9C5FDB5F96C" bold="true" box="[151,565,1655,1681]" pageId="15" pageNumber="416">
<taxonomicName id="4C2096A6291E4F08FF01F9C5FE99F96C" ID-CoL="84TL4" authorityName="Fry &amp; Hedgpeth" authorityYear="1969" box="[151,281,1655,1681]" class="Pycnogonida" family="Ammotheidae" genus="Sericosura" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pantopoda" pageId="15" pageNumber="416" phylum="Arthropoda" rank="genus">
<emphasis id="B9543137291E4F08FF01F9C5FE99F96C" bold="true" box="[151,281,1655,1681]" italics="true" pageId="15" pageNumber="416">Sericosura</emphasis>
</taxonomicName>
species indeterminate.
</emphasis>
</heading>
</paragraph>
</subSubSection>
<subSubSection id="C33ABEAE291E4F08FF01F92BFE38F94F" box="[151,440,1689,1714]" pageId="15" pageNumber="416" type="description">
<paragraph id="8B9FED25291E4F08FF01F92BFE38F94F" blockId="15.[151,565,1655,1714]" box="[151,440,1689,1714]" pageId="15" pageNumber="416">
<figureCitation id="131BF1A0291E4F08FF01F92BFF74F94F" box="[151,244,1689,1714]" captionStart="FIGURE 9" captionStartId="17.[151,250,1770,1792]" captionTargetBox="[269,1266,1549,1742]" captionTargetId="figure@17.[151,1436,1508,1766]" captionTargetPageId="17" captionText="FIGURE 9. Sericosura species indeterminate (larger subadult specimen). A, chelifore, scale x10; B, oviger distal segment, scale x40; C, abdomen, lateral, scale x10." httpUri="https://zenodo.org/record/2598963/files/figure.png" pageId="15" pageNumber="416">Figure 9</figureCitation>
AC;
<figureCitation id="131BF1A0291E4F08FEAFF92BFE03F94F" box="[313,387,1689,1714]" captionStart="PLATE 3" captionStartId="42.[151,234,1740,1762]" captionTargetBox="[151,1436,193,1718]" captionTargetId="figure@42.[151,1436,193,1718]" captionTargetPageId="42" captionText="PLATE 3. Tanystylum tiara sp. nov., holotype male. A, trunk lateral; B, trunk, dorsal; C, trunk anterior view. Sericosura species indeterminate. D, trunk dorsal; E, trunk, lateral. Austrodecus bamberi. F, trunk dorsal; G, trunk, lateral. Austrodecus taylorae sp. nov., holotype, male. H, trunk dorsal." httpUri="https://zenodo.org/record/2598991/files/figure.png" pageId="15" pageNumber="416">Plate 3</figureCitation>
DE
</paragraph>
</subSubSection>
<subSubSection id="C33ABEAE291E4F08FF01F953FEF5F877" pageId="15" pageNumber="416" type="materials_examined">
<paragraph id="8B9FED25291E4F08FF01F953FEF5F877" blockId="15.[151,1436,1761,2038]" pageId="15" pageNumber="416">
<emphasis id="B9543137291E4F08FF01F953FE02F907" bold="true" box="[151,386,1761,1786]" pageId="15" pageNumber="416">Material examined.</emphasis>
One subadult specimen (NHMUK 2018.19), Southwest Indian Ocean, Coral Seamount, 41˚ 22.31'S, 42˚ 54.57'E, ROV,
<quantity id="4CD840C0291E4F08FE46F8B4FD9AF8E0" box="[464,538,1798,1822]" metricMagnitude="2" metricUnit="m" metricValue="7.32" pageId="15" pageNumber="416" unit="m" value="732.0">732 m</quantity>
, specimen JC066-3440, stn 4.38, mooring site, on net containing Mango wood,
<date id="FF9ECBE5291E4F08FF01F898FEF6F8BF" box="[151,374,1833,1858]" pageId="15" pageNumber="416" value="2011-11-20">20 November 2011</date>
.
<materialsCitation id="3B48E778291E4F08FE15F898FEF1F877" ID-GBIF-Occurrence="2013824393" collectingDate="2011-11-20" collectionCode="NHMUK" elevation="732" pageId="15" pageNumber="416" specimenCode="NHMUK 2018.20" specimenCount="1">
One subadult specimen (
<specimenCode id="DB86455E291E4F08FD08F898FCF3F8BF" box="[670,883,1834,1858]" collectionCode="NHMUK" country="United Kingdom" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34665" lsid="urn:lsid:biocol.org:col:34665" name="Natural History Museum, London" pageId="15" pageNumber="416" type="Museum">NHMUK 2018.20</specimenCode>
), Southwest Indian Ocean, Coral Seamount, 41˚ 22.31'S, 42˚ 54.57'E, ROV,
<quantity id="4CD840C0291E4F08FE58F8FCFD98F898" box="[462,536,1870,1894]" metricMagnitude="2" metricUnit="m" metricValue="7.32" pageId="15" pageNumber="416" unit="m" value="732.0">
<elevation id="000D0A16291E4F08FE58F8FCFD98F898" box="[462,536,1870,1894]" metricMagnitude="2" metricUnit="m" metricValue="7.32" pageId="15" pageNumber="416" unit="m" value="732.0">732 m</elevation>
</quantity>
, specimen JC 066-1298D, stn 4.38, mooring site,
<collectingMethod id="52619532291E4F08FBDCF8FCFB10F898" box="[1098,1168,1870,1893]" pageId="15" pageNumber="416">on net</collectingMethod>
containing whale bone,
<date id="FF9ECBE5291E4F08FF01F8C0FEF1F877" box="[151,369,1905,1930]" pageId="15" pageNumber="416" value="2011-11-20">
<collectingDate id="EFDA320D291E4F08FF01F8C0FEF1F877" box="[151,369,1905,1930]" pageId="15" pageNumber="416" value="2011-11-20">20 November 2011</collectingDate>
</date>
</materialsCitation>
.
</paragraph>
</subSubSection>
<subSubSection id="C33ABEAE291E4F08FF51F827FC9EF80B" pageId="15" pageNumber="416" type="discussion">
<paragraph id="8B9FED25291E4F08FF51F827FC9EF80B" blockId="15.[151,1436,1761,2038]" pageId="15" pageNumber="416">
<emphasis id="B9543137291E4F08FF51F827FEBBF853" bold="true" box="[199,315,1941,1966]" pageId="15" pageNumber="416">Remarks.</emphasis>
These specimens are closest to the male specimens from the Walvis Ridge which Child 1882a assigned unconvincingly to
<taxonomicName id="4C2096A6291E4F08FE58F808FD70F82F" authority="(Gordon, 1944)" authorityName="Gordon" authorityYear="1944" baseAuthorityName="Gordon" baseAuthorityYear="1944" box="[462,752,1977,2002]" class="Pycnogonida" family="Ammotheidae" genus="Sericosura" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pantopoda" pageId="15" pageNumber="416" phylum="Arthropoda" rank="species" species="mitrata">
<emphasis id="B9543137291E4F08FE58F808FDBDF82F" box="[462,573,1978,2002]" italics="true" pageId="15" pageNumber="416">S. mitrata</emphasis>
(
<bibRefCitation id="EFB190D4291E4F08FDDDF80BFD68F82F" author="Gordon, I." box="[587,744,1977,2002]" pageId="15" pageNumber="416" pagination="1 - 72" refId="ref27636" refString="Gordon, I. (1944) Pycnogonida. Reports of the British, Australian and New Zealand Antarctic Research Expedition (B), 5 (1), 1 - 72." type="journal article" year="1944">Gordon, 1944</bibRefCitation>
)
</taxonomicName>
however in the absence of a range of material it is difficult to compare adults and subadults of that little known species.
</paragraph>
</subSubSection>
<caption id="DF5FBDAD29014F17FF01F8D7FD87F844" httpUri="https://zenodo.org/record/2598961/files/figure.png" pageId="16" pageNumber="417" startId="16.[151,250,1893,1915]" targetBox="[204,1348,231,1821]" targetPageId="16">
<paragraph id="8B9FED2529014F17FF01F8D7FD87F844" blockId="16.[151,1436,1893,1977]" pageId="16" pageNumber="417">
<emphasis id="B954313729014F17FF01F8D7FE94F886" bold="true" box="[151,276,1893,1915]" pageId="16" pageNumber="417">FIGURE 8.</emphasis>
<taxonomicName id="4C2096A629014F17FE8AF8D7FE48F886" authority="Staples, 2019" authorityName="Staples" authorityYear="2019" box="[284,456,1893,1915]" class="Pycnogonida" family="Ammotheidae" genus="Tanystylum" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pantopoda" pageId="16" pageNumber="417" phylum="Arthropoda" rank="species" species="tiara" status="sp. nov.">
<emphasis id="B954313729014F17FE8AF8D7FE48F886" box="[284,456,1893,1915]" italics="true" pageId="16" pageNumber="417">Tanystylum tiara</emphasis>
</taxonomicName>
<emphasis id="B954313729014F17FE47F8D7FDA3F886" bold="true" box="[465,547,1893,1915]" pageId="16" pageNumber="417">
<taxonomicNameLabel id="A2678C4C29014F17FE47F8D7FDA3F886" box="[465,547,1893,1915]" pageId="16" pageNumber="417" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
, holotype, female. A, trunk, dorsal view; B, trunk, lateral view; C, cephalon, anterior view; D, trunk, ventral view; E, third leg; F, tarsus and propodus, third leg; G, right palp; H, dorsodistal tubercles on third lateral process (distal view); I, right oviger.
</paragraph>
</caption>
<subSubSection id="C33ABEAE29004F16FF51FF2AFCE0FA3D" pageId="17" pageNumber="418" type="reference_group">
<paragraph id="8B9FED2529004F16FF51FF2AFDF7FBC8" blockId="17.[151,1437,151,1472]" pageId="17" pageNumber="418">
<taxonomicName id="4C2096A629004F16FF51FF2AFDCFFF4D" ID-CoL="6YJML" authority="(Gordon, 1944)" authorityName="Gordon" authorityYear="1944" baseAuthorityName="Gordon" baseAuthorityYear="1944" box="[199,591,151,176]" class="Pycnogonida" family="Ammotheidae" genus="Sericosura" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pantopoda" pageId="17" pageNumber="418" phylum="Arthropoda" rank="species" species="mitrata">
<emphasis id="B954313729004F16FF51FF2AFE1AFF4D" box="[199,410,152,176]" italics="true" pageId="17" pageNumber="418">Sericosura mitrata</emphasis>
(
<bibRefCitation id="EFB190D429004F16FE3FFF25FDC7FF4D" author="Gordon, I." box="[425,583,151,176]" pageId="17" pageNumber="418" pagination="1 - 72" refId="ref27636" refString="Gordon, I. (1944) Pycnogonida. Reports of the British, Australian and New Zealand Antarctic Research Expedition (B), 5 (1), 1 - 72." type="journal article" year="1944">Gordon, 1944</bibRefCitation>
)
</taxonomicName>
was described from the MacRobertson Coast
<collectingCountry id="F337ADB529004F16FBC0FF25FB4BFF4D" box="[1110,1227,151,176]" name="Antarctica" pageId="17" pageNumber="418">Antarctica</collectingCountry>
from
<quantity id="4CD840C029004F16FA99FF2AFAD7FF52" box="[1295,1367,152,176]" metricMagnitude="2" metricUnit="m" metricValue="2.19" pageId="17" pageNumber="418" unit="m" value="219.0">219 m</quantity>
depth and later recorded from Walvis Ridge off SW Africa at
<quantity id="4CD840C029004F16FC90FF0EFC21FF29" box="[774,929,188,213]" metricMagnitude="3" metricUnit="m" metricValue="2.1355" metricValueMax="2.154" metricValueMin="2.117" pageId="17" pageNumber="418" unit="m" value="2135.5" valueMax="2154.0" valueMin="2117.0">21172154 m</quantity>
depth (
<bibRefCitation id="EFB190D429004F16FC63FF0EFB01FF29" author="Child, C." box="[1013,1153,188,213]" pageId="17" pageNumber="418" pagination="1 - 54" refId="ref26708" refString="Child, C. A (1982 a) Deep-sea Pycnogonida from the North and South Atlantic Basins. Smithsonian Contributions to Zoology, 349, 1 - 54." type="journal article" year="1982">Child 1982a</bibRefCitation>
) and the Ross Sea at
<quantity id="4CD840C029004F16FAE4FF0EFF2DFF0A" metricMagnitude="2" metricUnit="m" metricValue="1.06" pageId="17" pageNumber="418" unit="m" value="106.0">106 m</quantity>
depth (
<bibRefCitation id="EFB190D429004F16FE9BFF6DFE24FF05" author="Child, C. A." box="[269,420,223,248]" pageId="17" pageNumber="418" pagination="1 - 48" refId="ref26872" refString="Child, C. A. (1994 a) Antarctic and subantarctic Pycnogonida: 1. The family Ammotheidae. Biology of the Antarctic Seas, 23, Antarctic Research Series, 63, 1 - 48." type="journal article" year="1994">Child 1994a</bibRefCitation>
). Child attributed several differences between the female
<typeStatus id="549B538729004F16FBCDFF6DFB3DFF05" box="[1115,1213,223,248]" pageId="17" pageNumber="418" type="holotype">holotype</typeStatus>
and his two male specimens from Walvis Ridge to sexual dimorphism, but I am of the view that both are distinct species. The two SWIR specimens are subadults, perhaps females, and I suspect that they represent further examples of Childs Walvis Ridge specimens. Fortuitously
<bibRefCitation id="EFB190D429004F16FDDBFEFEFCCAFE99" author="Bamber, R. N." box="[589,842,332,357]" pageId="17" pageNumber="418" pagination="56 - 68" refId="ref26450" refString="Bamber, R. N. (2009) Two new species of Sericosura Fry &amp; Hedgpeth, 1969 (Arthropoda: Ammotheidae) and a reassessment of the genus. Zootaxa, 2140, 56 - 68." type="journal article" year="2009">
Bamber (2009,
<figureCitation id="131BF1A029004F16FD68FEFEFCC2FE99" box="[766,834,332,357]" captionStart="FIGURE 4" captionStartId="8.[151,250,1940,1962]" captionTargetBox="[209,1317,208,1866]" captionTargetId="figure@8.[185,1404,193,1920]" captionTargetPageId="8" captionText="FIGURE 4. Nymphon dentatum sp. nov., holotype, male. A, trunk, lateral view; B, trunk, dorsal view; C, detached leg; D, tarsus and propodus; E, second coxa; F, cement gland duct; G, right oviger; H, oviger distal segments; I, palp. Paratype, female (JC066-3398). J, abdomen, lateral; K, ocular tubercle (arrow indicating anterior); L, left chelae." httpUri="https://zenodo.org/record/2598953/files/figure.png" pageId="17" pageNumber="418">Fig. 4</figureCitation>
)
</bibRefCitation>
reexamined and refigured the female
<typeStatus id="549B538729004F16FB6BFEFEFADFFE98" box="[1277,1375,332,357]" pageId="17" pageNumber="418" type="holotype">holotype</typeStatus>
of
<taxonomicName id="4C2096A629004F16FA11FEFFFF6AFE75" ID-CoL="6YJML" baseAuthorityName="Gordon" baseAuthorityYear="1944" class="Pycnogonida" family="Ammotheidae" genus="Sericosura" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pantopoda" pageId="17" pageNumber="418" phylum="Arthropoda" rank="species" species="mitrata">
<emphasis id="B954313729004F16FA11FEFFFF6AFE75" italics="true" pageId="17" pageNumber="418">S. mitrata</emphasis>
</taxonomicName>
and corrected several omissions from Gordons original description. In doing so Bamber made Childs identification more tenable but though I am mindful of Bambers support for the attribution of the Walvis Ridge specimen to
<taxonomicName id="4C2096A629004F16FEBDFE0AFE1CFE2D" ID-CoL="6YJML" baseAuthorityName="Gordon" baseAuthorityYear="1944" box="[299,412,440,464]" class="Pycnogonida" family="Ammotheidae" genus="Sericosura" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pantopoda" pageId="17" pageNumber="418" phylum="Arthropoda" rank="species" species="mitrata">
<emphasis id="B954313729004F16FEBDFE0AFE1CFE2D" box="[299,412,440,464]" italics="true" pageId="17" pageNumber="418">S. mitrata</emphasis>
</taxonomicName>
, there are several morphological differences that extend beyond sexual dimorphism and cause me to question Childs determination. Unlike the
<typeStatus id="549B538729004F16FCB1FE6EFC09FE08" box="[807,905,476,501]" pageId="17" pageNumber="418" type="holotype">holotype</typeStatus>
of
<taxonomicName id="4C2096A629004F16FC20FE6FFBA9FE09" ID-CoL="6YJML" baseAuthorityName="Gordon" baseAuthorityYear="1944" box="[950,1065,477,500]" class="Pycnogonida" family="Ammotheidae" genus="Sericosura" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pantopoda" pageId="17" pageNumber="418" phylum="Arthropoda" rank="species" species="mitrata">
<emphasis id="B954313729004F16FC20FE6FFBA9FE09" box="[950,1065,477,500]" italics="true" pageId="17" pageNumber="418">S. mitrata</emphasis>
</taxonomicName>
the lateral processes of Childs specimens are more widely separated (compare
<bibRefCitation id="EFB190D429004F16FD21FE4DFCD3FDE5" author="Bamber, R. N." box="[695,851,511,536]" pageId="17" pageNumber="418" pagination="56 - 68" refId="ref26450" refString="Bamber, R. N. (2009) Two new species of Sericosura Fry &amp; Hedgpeth, 1969 (Arthropoda: Ammotheidae) and a reassessment of the genus. Zootaxa, 2140, 56 - 68." type="journal article" year="2009">Bamber 2009</bibRefCitation>
,
<figureCitation id="131BF1A029004F16FCC8FE4DFC39FDE5" box="[862,953,511,536]" captionStart="FIGURE 4" captionStartId="8.[151,250,1940,1962]" captionTargetBox="[209,1317,208,1866]" captionTargetId="figure@8.[185,1404,193,1920]" captionTargetPageId="8" captionText="FIGURE 4. Nymphon dentatum sp. nov., holotype, male. A, trunk, lateral view; B, trunk, dorsal view; C, detached leg; D, tarsus and propodus; E, second coxa; F, cement gland duct; G, right oviger; H, oviger distal segments; I, palp. Paratype, female (JC066-3398). J, abdomen, lateral; K, ocular tubercle (arrow indicating anterior); L, left chelae." httpUri="https://zenodo.org/record/2598953/files/figure.png" pageId="17" pageNumber="418">Fig. 4A</figureCitation>
), the “clearly seen” transverse body ridges observed by Gordon (
<figureCitation id="131BF1A029004F16FE1AFD96FE6BFDC0" box="[396,491,548,573]" captionStart="FIGURE 19" captionStartId="38.[151,250,1970,1992]" captionTargetBox="[152,1347,660,1920]" captionTargetId="figure@38.[151,1435,623,1948]" captionTargetPageId="38" captionText="FIGURE 19. Pycnogonum cheni sp. nov., holotype. A, trunk, lateral view; B, trunk, dorsal view; C, proboscis, anterior view; D, third leg; E, tarsus &amp; propodus leg 3; F, left oviger; G, abdomen, dorsal view." httpUri="https://zenodo.org/record/2598981/files/figure.png" pageId="17" pageNumber="418">Fig. 19b</figureCitation>
) are not evident, the proboscis is much narrower, the auxiliary claws are longer and the abundant hair-like setae on the ventral surfaces of the tibiae are not present.
<bibRefCitation id="EFB190D429004F16FB8AFDF5FB38FD9D" author="Child, C." box="[1052,1208,583,608]" pageId="17" pageNumber="418" pagination="1 - 54" refId="ref26708" refString="Child, C. A (1982 a) Deep-sea Pycnogonida from the North and South Atlantic Basins. Smithsonian Contributions to Zoology, 349, 1 - 54." type="journal article" year="1982">Child (1982a)</bibRefCitation>
did not mention the shape of the abdomen but based on his
<figureCitation id="131BF1A029004F16FDC4FDDEFD3FFD78" box="[594,703,620,645]" captionStart="FIGURE 6" captionStartId="12.[151,250,1428,1450]" captionTargetBox="[236,1266,659,1368]" captionTargetId="figure@12.[151,1436,591,1407]" captionTargetPageId="12" captionText="FIGURE 6 Nymphon species indeterminate. A, trunk, dorsal view; B, third leg; C, palps, chela and proboscis ventral view." httpUri="https://zenodo.org/record/2598957/files/figure.png" pageId="17" pageNumber="418">Figure 6a</figureCitation>
, it is more likely arched as opposed to being almost straight in
<taxonomicName id="4C2096A629004F16FA11FDDFFF6AFD55" ID-CoL="6YJML" baseAuthorityName="Gordon" baseAuthorityYear="1944" class="Pycnogonida" family="Ammotheidae" genus="Sericosura" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pantopoda" pageId="17" pageNumber="418" phylum="Arthropoda" rank="species" species="mitrata">
<emphasis id="B954313729004F16FA11FDDFFF6AFD55" italics="true" pageId="17" pageNumber="418">S. mitrata</emphasis>
</taxonomicName>
(
<bibRefCitation id="EFB190D429004F16FF6DFD3DFD8AFD55" author="Gordon, I." box="[251,522,655,680]" pageId="17" pageNumber="418" pagination="1 - 72" refId="ref27636" refString="Gordon, I. (1944) Pycnogonida. Reports of the British, Australian and New Zealand Antarctic Research Expedition (B), 5 (1), 1 - 72." type="journal article" year="1944">
Gordon 1944,
<figureCitation id="131BF1A029004F16FE30FD3DFD8AFD55" box="[422,522,655,680]" captionStart="FIGURE 19" captionStartId="38.[151,250,1970,1992]" captionTargetBox="[152,1347,660,1920]" captionTargetId="figure@38.[151,1435,623,1948]" captionTargetPageId="38" captionText="FIGURE 19. Pycnogonum cheni sp. nov., holotype. A, trunk, lateral view; B, trunk, dorsal view; C, proboscis, anterior view; D, third leg; E, tarsus &amp; propodus leg 3; F, left oviger; G, abdomen, dorsal view." httpUri="https://zenodo.org/record/2598981/files/figure.png" pageId="17" pageNumber="418">Fig. 19b</figureCitation>
</bibRefCitation>
). Childs Walvis Ridge specimens are typical deep-water blind forms recorded from
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depth whereas
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<emphasis id="B954313729004F16FDBAFD07FD1FFD31" box="[556,671,693,716]" italics="true" pageId="17" pageNumber="418">S. mitrata</emphasis>
</taxonomicName>
is one of a few blind
<taxonomicName id="4C2096A629004F16FC31FD07FBA1FD31" ID-CoL="84TL4" authorityName="Fry &amp; Hedgpeth" authorityYear="1969" box="[935,1057,693,716]" class="Pycnogonida" family="Ammotheidae" genus="Sericosura" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pantopoda" pageId="17" pageNumber="418" phylum="Arthropoda" rank="genus">
<emphasis id="B954313729004F16FC31FD07FBA1FD31" box="[935,1057,693,716]" italics="true" pageId="17" pageNumber="418">Sericosura</emphasis>
</taxonomicName>
species recorded from relatively shallow water (
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) and may indicate a further point of difference. The SWIR specimens share all significant characters with the Walvis Ridge specimens; clearly separated lateral processes, a distinctly bifurcate ocular tubercle, possession of strong spines on the distal margins of the scapes, auxiliary claws longer than half the length of the main claw and the spination pattern of the propodus. The genus
<taxonomicName id="4C2096A629004F16FB97FCF7FBFAFCA1" ID-CoL="84TL4" authorityName="Fry &amp; Hedgpeth" authorityYear="1969" box="[1025,1146,837,860]" class="Pycnogonida" family="Ammotheidae" genus="Sericosura" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pantopoda" pageId="17" pageNumber="418" phylum="Arthropoda" rank="genus">
<emphasis id="B954313729004F16FB97FCF7FBFAFCA1" box="[1025,1146,837,860]" italics="true" pageId="17" pageNumber="418">Sericosura</emphasis>
</taxonomicName>
is mostly associated with hydrothermal vents and cold seeps but neither these SWIR specimens nor Childs Walvis Ridge specimens appear to be associated with these geological features. The geographical distribution of
<taxonomicName id="4C2096A629004F16FBA6FC3FFB1FFC59" ID-CoL="6YJML" baseAuthorityName="Gordon" baseAuthorityYear="1944" box="[1072,1183,909,932]" class="Pycnogonida" family="Ammotheidae" genus="Sericosura" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pantopoda" pageId="17" pageNumber="418" phylum="Arthropoda" rank="species" species="mitrata">
<emphasis id="B954313729004F16FBA6FC3FFB1FFC59" box="[1072,1183,909,932]" italics="true" pageId="17" pageNumber="418">S. mitrata</emphasis>
</taxonomicName>
is described by
<bibRefCitation id="EFB190D429004F16FAC8FC3EFF6EFC35" author="Child, C. A." pageId="17" pageNumber="418" pagination="1 - 48" refId="ref26872" refString="Child, C. A. (1994 a) Antarctic and subantarctic Pycnogonida: 1. The family Ammotheidae. Biology of the Antarctic Seas, 23, Antarctic Research Series, 63, 1 - 48." type="journal article" year="1994">Child (1994a)</bibRefCitation>
as “wide but scattered” and “enigmatic” by
<bibRefCitation id="EFB190D429004F16FD62FC1DFC21FC35" author="Bamber, R. N." box="[756,929,943,968]" pageId="17" pageNumber="418" pagination="56 - 68" refId="ref26450" refString="Bamber, R. N. (2009) Two new species of Sericosura Fry &amp; Hedgpeth, 1969 (Arthropoda: Ammotheidae) and a reassessment of the genus. Zootaxa, 2140, 56 - 68." type="journal article" year="2009">Bamber (2009)</bibRefCitation>
but should it be established that the Walvis Ridge specimens are a distinct species then this anomaly would be largely resolved. I am disregarding the unreported probable record of a juvenile
<taxonomicName id="4C2096A629004F16FDE7FC4AFD5FFBED" ID-CoL="6YJML" baseAuthorityName="Gordon" baseAuthorityYear="1944" box="[625,735,1016,1040]" class="Pycnogonida" family="Ammotheidae" genus="Sericosura" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pantopoda" pageId="17" pageNumber="418" phylum="Arthropoda" rank="species" species="mitrata">
<emphasis id="B954313729004F16FDE7FC4AFD5FFBED" box="[625,735,1016,1040]" italics="true" pageId="17" pageNumber="418">S. mitrata</emphasis>
</taxonomicName>
from the mid-Atlantic Ridge (see
<bibRefCitation id="EFB190D429004F16FBC8FC45FB68FBED" author="Child, C. A." box="[1118,1256,1015,1040]" pageId="17" pageNumber="418" pagination="1 - 48" refId="ref26872" refString="Child, C. A. (1994 a) Antarctic and subantarctic Pycnogonida: 1. The family Ammotheidae. Biology of the Antarctic Seas, 23, Antarctic Research Series, 63, 1 - 48." type="journal article" year="1994">Child 1994a</bibRefCitation>
) until such time as that particular specimen is re-examined.
</paragraph>
<paragraph id="8B9FED2529004F16FF51FB8DFCE0FA3D" blockId="17.[151,1437,151,1472]" pageId="17" pageNumber="418">
The ocular tubercle in both specimens is distinctly bifurcate but that of the larger specimen (
<figureCitation id="131BF1A029004F16FB4AFB8DFAE0FBA5" box="[1244,1376,1087,1112]" captionStart="PLATE 3" captionStartId="42.[151,234,1740,1762]" captionTargetBox="[151,1436,193,1718]" captionTargetId="figure@42.[151,1436,193,1718]" captionTargetPageId="42" captionText="PLATE 3. Tanystylum tiara sp. nov., holotype male. A, trunk lateral; B, trunk, dorsal; C, trunk anterior view. Sericosura species indeterminate. D, trunk dorsal; E, trunk, lateral. Austrodecus bamberi. F, trunk dorsal; G, trunk, lateral. Austrodecus taylorae sp. nov., holotype, male. H, trunk dorsal." httpUri="https://zenodo.org/record/2598991/files/figure.png" pageId="17" pageNumber="418">Plate 3D, E</figureCitation>
) was inadvertently squashed below the surface prior to being photographed and is no longer visible. All propodi are of a uniform size and shape. The chelifores of the larger specimen are extended from the cephalon with most of the scapes showing. The chela is separated from the scape by a wide (presumably extended) membrane (
<figureCitation id="131BF1A029004F16FB6EFB1EFAD1FB39" box="[1272,1361,1196,1221]" captionStart="FIGURE 9" captionStartId="17.[151,250,1770,1792]" captionTargetBox="[269,1266,1549,1742]" captionTargetId="figure@17.[151,1436,1508,1766]" captionTargetPageId="17" captionText="FIGURE 9. Sericosura species indeterminate (larger subadult specimen). A, chelifore, scale x10; B, oviger distal segment, scale x40; C, abdomen, lateral, scale x10." httpUri="https://zenodo.org/record/2598963/files/figure.png" pageId="17" pageNumber="418">Fig. 9A</figureCitation>
). Each scape has three or four strong distal spines. The chelifores of the smaller specimen are withdrawn beneath the cephalic hood with only the chelae exposed. The tip of the oviger in the larger specimen bears two simple spines (
<figureCitation id="131BF1A029004F16FF09FAA5FF78FACD" box="[159,248,1303,1328]" captionStart="FIGURE 9" captionStartId="17.[151,250,1770,1792]" captionTargetBox="[269,1266,1549,1742]" captionTargetId="figure@17.[151,1436,1508,1766]" captionTargetPageId="17" captionText="FIGURE 9. Sericosura species indeterminate (larger subadult specimen). A, chelifore, scale x10; B, oviger distal segment, scale x40; C, abdomen, lateral, scale x10." httpUri="https://zenodo.org/record/2598963/files/figure.png" pageId="17" pageNumber="418">Fig. 9B</figureCitation>
). The abdomen is articulated at its base and arched with several dorsal and distal spines (
<figureCitation id="131BF1A029004F16FB75FAA5FABCFACD" box="[1251,1340,1303,1328]" captionStart="FIGURE 9" captionStartId="17.[151,250,1770,1792]" captionTargetBox="[269,1266,1549,1742]" captionTargetId="figure@17.[151,1436,1508,1766]" captionTargetPageId="17" captionText="FIGURE 9. Sericosura species indeterminate (larger subadult specimen). A, chelifore, scale x10; B, oviger distal segment, scale x40; C, abdomen, lateral, scale x10." httpUri="https://zenodo.org/record/2598963/files/figure.png" pageId="17" pageNumber="418">Fig. 9C</figureCitation>
). Unlike the over-reaching abdomen of the larger specimen, the abdomen of the smaller specimen is directed downwards between the fourth lateral processes but the abdomen is very flexible in the vertical plane. Both of these specimens are chelate with only partially developed ovigers. A cement gland duct is not evident in either specimen. Developing ovigers are present but segmentation is incomplete.
</paragraph>
</subSubSection>
<caption id="DF5FBDAD29004F16FF01F958FDBCF8E3" httpUri="https://zenodo.org/record/2598963/files/figure.png" pageId="17" pageNumber="418" startId="17.[151,250,1770,1792]" targetBox="[269,1266,1549,1742]" targetPageId="17">
<paragraph id="8B9FED2529004F16FF01F958FDBCF8E3" blockId="17.[151,1436,1770,1822]" pageId="17" pageNumber="418">
<emphasis id="B954313729004F16FF01F958FE95F8FD" bold="true" box="[151,277,1770,1792]" pageId="17" pageNumber="418">FIGURE 9.</emphasis>
<taxonomicName id="4C2096A629004F16FE88F958FE0CF902" authorityName="Fry &amp; Hedgpeth" authorityYear="1969" box="[286,396,1770,1791]" class="Pycnogonida" family="Ammotheidae" genus="Sericosura" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pantopoda" pageId="17" pageNumber="418" phylum="Arthropoda" rank="genus">
<emphasis id="B954313729004F16FE88F958FE0CF902" box="[286,396,1770,1791]" italics="true" pageId="17" pageNumber="418">Sericosura</emphasis>
</taxonomicName>
species indeterminate (larger subadult specimen). A, chelifore, scale x10; B, oviger distal segment, scale x40; C, abdomen, lateral, scale x10.
</paragraph>
</caption>
<subSubSection id="C33ABEAE29004F15FF51F8F5FAF7FE99" lastPageId="18" lastPageNumber="419" pageId="17" pageNumber="418" type="description">
<paragraph id="8B9FED2529004F16FF51F8F5FA1CF813" blockId="17.[151,1436,1861,2030]" pageId="17" pageNumber="418">
<bibRefCitation id="EFB190D429004F16FF51F8F5FE24F8A3" author="Wang, J. &amp; Dingyong, H. &amp; Shi, X. &amp; Lin, R. &amp; Niu, W." box="[199,420,1861,1887]" pageId="17" pageNumber="418" pagination="131 - 138" refId="ref29683" refString="Wang, J., Dingyong, H., Shi, X., Lin, R. &amp; Niu, W. (2018) First record and a new species of Sericosura Fry &amp; Hedgpeth, 1969 (Arthropoda: Pycnogonida: Ammotheidae) from a hydrothermal vent of the Southwestern Indian Ridge. Zootaxa, 4420 (1), 131 - 138. https: // doi. org / 10.11646 / zootaxa. 4420.1.8" type="journal article" year="2018">
Wang
<emphasis id="B954313729004F16FE84F8F5FEC7F8A3" box="[274,327,1861,1886]" italics="true" pageId="17" pageNumber="418">et al</emphasis>
. (2018)
</bibRefCitation>
recorded a juvenile specimen which they hesitantly referred to
<taxonomicName id="4C2096A629004F16FB04F8F4FECAF87E" authority="Child &amp; Segonzac, 1996" authorityName="Child &amp; Segonzac" authorityYear="1996" class="Pycnogonida" family="Ammotheidae" genus="Sericosura" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pantopoda" pageId="17" pageNumber="418" phylum="Arthropoda" rank="species" species="heteroscela">
<emphasis id="B954313729004F16FB04F8F4FAB2F8A3" box="[1170,1330,1861,1886]" italics="true" pageId="17" pageNumber="418">S. heteroscela</emphasis>
<bibRefCitation id="EFB190D429004F16FAABF8F7FECAF87E" author="Child, C. A. &amp; Segonzac, M." pageId="17" pageNumber="418" pagination="664 - 676" refId="ref27107" refString="Child, C. A. &amp; Segonzac, M. (1996) Sericosura heteroscela and S. cyrtoma, new species, and other Pycnogonida from Atlantic and Pacific hydrothermal vents, with notes on habitat and environment. Proceedings of the Biological Society of Washington, 109 (94), 664 - 676." type="journal article" year="1996">Child &amp; Segonzac, 1996</bibRefCitation>
</taxonomicName>
based mainly on the forward-leaning, bifurcate ocular tubercle and compact legs. It is likely that the juvenile specimen recorded by Wang
<emphasis id="B954313729004F16FDF3F83DFD16F85B" box="[613,662,1933,1958]" italics="true" pageId="17" pageNumber="418">et al</emphasis>
. and these specimens from the Coral Seamount are one and the same species and represent juveniles and subadults of Childs Walvis Ridge specimen. Should I be correct in identifying the SWIR specimens as subadult forms of an independent species then the distribution of
<taxonomicName id="4C2096A629004F16FB1DF864FAA8F813" authorityName="Child &amp; Segonzac" authorityYear="1996" box="[1163,1320,2005,2030]" class="Pycnogonida" family="Ammotheidae" genus="Sericosura" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pantopoda" pageId="17" pageNumber="418" phylum="Arthropoda" rank="species" species="heteroscela">
<emphasis id="B954313729004F16FB1DF864FAA8F813" box="[1163,1320,2005,2030]" italics="true" pageId="17" pageNumber="418">S. heteroscela</emphasis>
</taxonomicName>
cannot be
</paragraph>
<paragraph id="8B9FED2529034F15FF01FF25FE97FF28" blockId="18.[151,1436,151,357]" pageId="18" pageNumber="419">
said to extend from the Mid-Atlantic Ridge (SW of the Azores Islands) to the southern hemisphere as proposed by Wang
<emphasis id="B954313729034F15FF48FF0FFE97FF28" box="[222,279,188,213]" italics="true" pageId="18" pageNumber="419">et al.</emphasis>
</paragraph>
<paragraph id="8B9FED2529034F15FF58FF6DFDBCFEE0" blockId="18.[151,1436,151,357]" pageId="18" pageNumber="419">Figures of the subadult chela, oviger and abdomen are provided but otherwise there is nothing to add to Childs figures of the adult specimen.</paragraph>
<paragraph id="8B9FED2529034F15FF51FE9AFAF7FE99" blockId="18.[151,1436,151,357]" pageId="18" pageNumber="419">
<bibRefCitation id="EFB190D429034F15FF51FE9AFE17FEBD" author="Wang, J. &amp; Dingyong, H. &amp; Shi, X. &amp; Lin, R. &amp; Niu, W." box="[199,407,295,320]" pageId="18" pageNumber="419" pagination="131 - 138" refId="ref29683" refString="Wang, J., Dingyong, H., Shi, X., Lin, R. &amp; Niu, W. (2018) First record and a new species of Sericosura Fry &amp; Hedgpeth, 1969 (Arthropoda: Pycnogonida: Ammotheidae) from a hydrothermal vent of the Southwestern Indian Ridge. Zootaxa, 4420 (1), 131 - 138. https: // doi. org / 10.11646 / zootaxa. 4420.1.8" type="journal article" year="2018">
Wang
<emphasis id="B954313729034F15FE98FE9BFEBFFEBD" box="[270,319,295,320]" italics="true" pageId="18" pageNumber="419">et al</emphasis>
. (2018)
</bibRefCitation>
described
<taxonomicName id="4C2096A629034F15FD86FE9AFD4EFEBD" authorityName="Wang, Huang, Shi, Lin &amp; Niu" authorityYear="2018" box="[528,718,295,320]" class="Pycnogonida" family="Ammotheidae" genus="Sericosura" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pantopoda" pageId="18" pageNumber="419" phylum="Arthropoda" rank="species" species="duanqiaoensis">
<emphasis id="B954313729034F15FD86FE9AFD4EFEBD" box="[528,718,295,320]" italics="true" pageId="18" pageNumber="419">S. duanqiaoensis</emphasis>
</taxonomicName>
from the Duanquiao hydrothermal field on the SWIR but unlike the present material that species has a low, non-bifurcate ocular tubercle, dimorphic legs and is far more setose.
</paragraph>
</subSubSection>
</treatment>
</document>