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<document id="4047CDFF9A361D9FA904724623550692" ID-DOI="10.11646/zootaxa.3995.1.21" ID-GBIF-Dataset="810c1097-eff4-4262-acd6-1f76d05f1f83" ID-ISSN="1175-5326" ID-Zenodo-Dep="236857" ID-ZooBank="1D5CD052-9754-493C-836D-6A69756747D9" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.taxonomicNames_approvedBy="felipe" checkinTime="1461278201543" checkinUser="plazi" docAuthor="Oliver, P. Graham" docDate="2015" docId="3956C47FFFE6E325FF44FE3FFEE3FBE3" docLanguage="en" docName="zt03995p263.pdf" docOrigin="Zootaxa 3995 (1)" docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article" docStyleId="647186512141C8FC8976D5BCC54AEB7D" docStyleName="Zootaxa.2013-.journal_article" docStyleVersion="9" docTitle="Channelaxinus excavata Dall 1901" docType="treatment" docVersion="8" lastPageNumber="258" masterDocId="C56FBC07FFE3E323FFD3FFE5FF80FFD7" masterDocTitle="Deep-water Thyasiridae (Mollusca: Bivalvia) from the Oman Margin, Arabian Sea, new species and examples of endemism and cosmopolitanism" masterLastPageNumber="263" masterPageNumber="252" pageNumber="257" updateTime="1698613566852" updateUser="plazi">
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<mods:title id="784D2E93692B2403D7F26974DA3A1F9F">Deep-water Thyasiridae (Mollusca: Bivalvia) from the Oman Margin, Arabian Sea, new species and examples of endemism and cosmopolitanism</mods:title>
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<mods:name id="F45F88EA0E8FA6E6070336D81ECCB5A5" type="personal">
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<mods:namePart id="20DE66F0CF94A0C56812301D6D28B3F8">Oliver, P. Graham</mods:namePart>
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<mods:date id="DE9232C16099DA1958C6E712EB94B8A1">2015</mods:date>
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<mods:number id="62438FB15F55ED1A52CEA198B5A099E7">3995</mods:number>
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<mods:identifier id="5C69E71D8840CB4C6BC7E67E21F2602B" type="DOI">10.11646/zootaxa.3995.1.21</mods:identifier>
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<treatment id="3956C47FFFE6E325FF44FE3FFEE3FBE3" ID-DOI="http://doi.org/10.5281/zenodo.6098579" ID-GBIF-Taxon="119640196" ID-Zenodo-Dep="6098579" LSID="urn:lsid:plazi:treatment:3956C47FFFE6E325FF44FE3FFEE3FBE3" httpUri="http://treatment.plazi.org/id/3956C47FFFE6E325FF44FE3FFEE3FBE3" lastPageId="6" lastPageNumber="258" pageId="5" pageNumber="257">
<subSubSection id="F9E526E2FFE6E326FF44FE3FFAACF83B" pageId="5" pageNumber="257" type="nomenclature">
<paragraph id="B1407569FFE6E326FF44FE3FFDF7FE23" blockId="5.[151,631,474,534]" box="[151,631,474,500]" pageId="5" pageNumber="257">
<heading id="EA08C205FFE6E326FF44FE3FFDF7FE23" bold="true" box="[151,631,474,500]" fontSize="11" level="1" pageId="5" pageNumber="257" reason="1">
<taxonomicName id="76FF0EEAFFE6E326FF44FE3FFDF7FE23" authority="Dall, 1901" authorityName="Dall" authorityYear="1901" box="[151,631,474,500]" class="Bivalvia" family="Thyasiridae" genus="Channelaxinus" kingdom="Animalia" order="Lucinoida" pageId="5" pageNumber="257" phylum="Mollusca" rank="species" species="excavata">
<emphasis id="838BA97BFFE6E326FF44FE3FFDF7FE23" bold="true" box="[151,631,474,500]" pageId="5" pageNumber="257">
<emphasis id="838BA97BFFE6E326FF44FE3FFED1FE23" bold="true" box="[151,337,474,500]" italics="true" pageId="5" pageNumber="257">Channelaxinus</emphasis>
aff.
<emphasis id="838BA97BFFE6E326FE5AFE3FFE72FE23" bold="true" box="[393,498,474,500]" italics="true" pageId="5" pageNumber="257">excavata</emphasis>
<bibRefCitation id="D56E0898FFE6E326FE2AFE3FFDF7FE23" author="Dall" box="[505,631,474,500]" pageId="5" pageNumber="257" refString="Dall, W. H. (1901) Synopsis of the Lucinacea and of the American species. Proceedings of the United States National Museum, 23 (1237), 779 - 833." type="journal article" year="1901">Dall, 1901</bibRefCitation>
</emphasis>
</taxonomicName>
</heading>
</paragraph>
<paragraph id="B1407569FFE6E326FF44FE18FE91FDC1" blockId="5.[151,631,474,534]" box="[151,273,509,534]" pageId="5" pageNumber="257">
<figureCitation id="29C469ECFFE6E326FF44FE18FE91FDC1" box="[151,273,509,534]" captionStart="FIGURE 3. A – B" captionStartId="5.[151,250,1914,1936]" captionTargetBox="[151,1436,589,1891]" captionTargetId="figure@5.[151,1436,589,1893]" captionTargetPageId="5" captionText="FIGURE 3. A – B, Channelaxinus aff. excavatus, Oman margin; C – D, C. excavatus (Dall), holotype, United States National Museum 107449; E – F, C. adelaideana (Iredale), holotype, Australian Museum, C 32091; G, C. perplicata (Salas) as Cryptodon plicatus reproduced from Verrill &amp; Bush, 1898; H – I, C. benthicola (Iredale), holotype, Australian Museum C 47714." httpUri="https://zenodo.org/record/236860/files/figure.png" pageId="5" pageNumber="257">Figs 3A–B</figureCitation>
</paragraph>
<caption id="E58025E1FFE6E326FF44F89FFAB0F81A" httpUri="https://zenodo.org/record/236860/files/figure.png" pageId="5" pageNumber="257" targetBox="[151,1436,589,1891]" targetPageId="5">
<paragraph id="B1407569FFE6E326FF44F89FFAB0F81A" blockId="5.[151,1436,1914,2028]" pageId="5" pageNumber="257">
<emphasis id="838BA97BFFE6E326FF44F89FFE95F858" bold="true" box="[151,277,1914,1936]" pageId="5" pageNumber="257">FIGURE 3.</emphasis>
A–B,
<taxonomicName id="76FF0EEAFFE6E326FE8FF89FFD0AF847" box="[348,650,1914,1936]" class="Bivalvia" family="Thyasiridae" genus="Channelaxinus" kingdom="Animalia" order="Lucinoida" pageId="5" pageNumber="257" phylum="Mollusca" rank="species" species="excavatus">
<emphasis id="838BA97BFFE6E326FE8FF89FFD0AF847" box="[348,650,1914,1936]" italics="true" pageId="5" pageNumber="257">Channelaxinus aff. excavatus</emphasis>
</taxonomicName>
, Oman margin; C–D,
<taxonomicName id="76FF0EEAFFE6E326FCA7F89EFBBEF847" authority="Dall" authorityName="Dall" box="[884,1086,1914,1936]" class="Bivalvia" family="Thyasiridae" genus="Channelaxinus" kingdom="Animalia" order="Lucinoida" pageId="5" pageNumber="257" phylum="Mollusca" rank="species" species="excavatus">
<emphasis id="838BA97BFFE6E326FCA7F89EFC78F847" box="[884,1016,1915,1936]" italics="true" pageId="5" pageNumber="257">C. excavatus</emphasis>
(Dall)
</taxonomicName>
, holotype, United States National Museum 107449; E–F,
<taxonomicName id="76FF0EEAFFE6E326FE50F87FFDFCF878" authority="Iredale" authorityName="Iredale" box="[387,636,1945,1967]" class="Bivalvia" family="Thyasiridae" genus="Channelaxinus" kingdom="Animalia" order="Lucinoida" pageId="5" pageNumber="257" phylum="Mollusca" rank="species" species="adelaideana">
<emphasis id="838BA97BFFE6E326FE50F87FFD9DF878" box="[387,541,1945,1967]" italics="true" pageId="5" pageNumber="257">C. adelaideana</emphasis>
(Iredale)
</taxonomicName>
, holotype, Australian Museum, C32091; G,
<taxonomicName id="76FF0EEAFFE6E326FBEEF87FFA8EF878" authority="Salas" authorityName="Salas" box="[1085,1294,1945,1967]" class="Bivalvia" family="Thyasiridae" genus="Channelaxinus" kingdom="Animalia" order="Lucinoida" pageId="5" pageNumber="257" phylum="Mollusca" rank="species" species="perplicata">
<emphasis id="838BA97BFFE6E326FBEEF87FFB43F878" box="[1085,1219,1945,1967]" italics="true" pageId="5" pageNumber="257">C. perplicata</emphasis>
(Salas)
</taxonomicName>
as
<taxonomicName id="76FF0EEAFFE6E326FAE3F87CFF67F81A" class="Bivalvia" family="Thyasiridae" genus="Cryptodon" higherTaxonomySource="CoL" kingdom="Animalia" order="Lucinida" pageId="5" pageNumber="257" phylum="Mollusca" rank="species" species="plicatus">
<emphasis id="838BA97BFFE6E326FAE3F87CFF67F81A" italics="true" pageId="5" pageNumber="257">Cryptodon plicatus</emphasis>
</taxonomicName>
reproduced from Verrill &amp; Bush, 1898; H–I,
<taxonomicName id="76FF0EEAFFE6E326FD60F85DFC1AF81A" authority="Iredale" authorityName="Iredale" box="[691,922,1975,1997]" class="Bivalvia" family="Thyasiridae" genus="Cryptodon" higherTaxonomySource="CoL" kingdom="Animalia" order="Lucinida" pageId="5" pageNumber="257" phylum="Mollusca" rank="species" species="benthicola">
<emphasis id="838BA97BFFE6E326FD60F85DFCBBF81A" box="[691,827,1975,1997]" italics="true" pageId="5" pageNumber="257">C. benthicola</emphasis>
(Iredale)
</taxonomicName>
, holotype, Australian Museum C47714.
</paragraph>
</caption>
<paragraph id="B1407569FFE6E326FF44F833FAACF83B" blockId="5.[151,1436,1914,2028]" box="[151,1324,2006,2028]" pageId="5" pageNumber="257">Afz, anterior flattened zone; lun, lunule; pfz, posterior flattened zone; psn, posterior sinus; sms, submarginal sulcus.</paragraph>
</subSubSection>
<subSubSection id="F9E526E2FFE5E325FF44FF72FC35FF02" pageId="6" pageNumber="258" type="materials_examined">
<paragraph id="B1407569FFE5E325FF44FF72FC35FF02" blockId="6.[151,1437,151,1077]" pageId="6" pageNumber="258">
<emphasis id="838BA97BFFE5E325FF44FF72FE86FF67" bold="true" box="[151,262,151,176]" pageId="6" pageNumber="258">Material.</emphasis>
One shell, Off Ras Madrakah, southern
<collectingCountry id="C9E835F9FFE5E325FD32FF7DFCA8FF67" box="[737,808,152,176]" name="Oman" pageId="6" pageNumber="258">Oman</collectingCountry>
, Discovery cruise 211 st. 12719#1,
<geoCoordinate id="D4CB13AEFFE5E325FB1FFF7DFAADFF67" box="[1228,1325,152,176]" direction="north" orientation="latitude" pageId="6" pageNumber="258" precision="925" value="19.133333">19°08´N</geoCoordinate>
<geoCoordinate id="D4CB13AEFFE5E325FAE4FF72FA17FF67" box="[1335,1431,151,176]" direction="east" orientation="longitude" pageId="6" pageNumber="258" precision="925" value="58.65">58°39´E</geoCoordinate>
,
<quantity id="7607D88CFFE5E325FF44FF59FF6EFF03" box="[151,238,188,213]" metricMagnitude="3" metricUnit="m" metricValue="3.15" pageId="6" pageNumber="258" unit="m" value="3150.0">3150 m</quantity>
, collected P.G. Oliver,
<date id="C54153A9FFE5E325FE3EFF59FD2CFF03" box="[493,684,188,213]" pageId="6" pageNumber="258" value="1994-10-31">31 October 1994</date>
.
<collectionCode id="D7EEEDACFFE5E325FD64FF58FC83FF03" box="[695,771,189,212]" httpUri="http://grbio.org/cool/c7yt-hh77" name="Naturhistorisches Museum, Wien" pageId="6" pageNumber="258">NMW</collectionCode>
.Z. 1995.009.17.
</paragraph>
</subSubSection>
<subSubSection id="F9E526E2FFE5E325FF14FF3AFC56FE22" pageId="6" pageNumber="258" type="description">
<paragraph id="B1407569FFE5E325FF14FF3AFC56FE22" blockId="6.[151,1437,151,1077]" pageId="6" pageNumber="258">
<emphasis id="838BA97BFFE5E325FF14FF3AFED1FF2F" bold="true" box="[199,337,223,248]" pageId="6" pageNumber="258">Description</emphasis>
. Shell. 11.0 mm in length,
<quantity id="7607D88CFFE5E325FD41FF3AFD78FF20" box="[658,760,223,248]" metricMagnitude="-2" metricUnit="m" metricValue="1.15" pageId="6" pageNumber="258" unit="mm" value="11.5">11.5 mm</quantity>
in height. Thin but robust. Equivalve. Equilateral. Outline polygonal, umbos low, beaks prosogyrous; anterior dorsal slope steep, slightly concave; anterior very short almost straight; ventral rounded; posterior ventral short, almost straight; posterior with a deep sinus; posterior dorsal long, straight, sloping steeply. Surface strongly contoured; lunule excavated and bounded by a well developed ridge; anterior slope flattened demarcated by a weak radial ridge; posterior demarcated by a deep sulcus, anterior to it a flattened zone; submarginal sulcus deeply excavated with an elongate auricle that does not rise above the submarginal sulcus. Hinge edentulous, ligament in a shallow depression on the auricle and extending for ~half the length of the auricle. Muscle scars indistinct. Shell chalky white in colour.
</paragraph>
</subSubSection>
<subSubSection id="F9E526E2FFE5E325FF14FE1AFEE3FBE3" pageId="6" pageNumber="258" type="discussion">
<paragraph id="B1407569FFE5E325FF14FE1AFDEAFCE0" blockId="6.[151,1437,151,1077]" pageId="6" pageNumber="258">
<emphasis id="838BA97BFFE5E325FF14FE1AFEBBFDCF" bold="true" box="[199,315,511,536]" pageId="6" pageNumber="258">Remarks.</emphasis>
Shells of this general form are found in the East Pacific (
<taxonomicName id="76FF0EEAFFE5E325FC04FDE5FBDEFDCF" box="[983,1118,512,536]" class="Bivalvia" family="Thyasiridae" genus="Channelaxinus" kingdom="Animalia" order="Lucinoida" pageId="6" pageNumber="258" phylum="Mollusca" rank="species" species="excavata">
<emphasis id="838BA97BFFE5E325FC04FDE5FBDEFDCF" box="[983,1118,512,536]" italics="true" pageId="6" pageNumber="258">C. excavata</emphasis>
</taxonomicName>
(
<figureCitation id="29C469ECFFE5E325FBBCFE1AFB35FDCF" box="[1135,1205,511,536]" captionStart="FIGURE 3. A – B" captionStartId="5.[151,250,1914,1936]" captionTargetBox="[151,1436,589,1891]" captionTargetId="figure@5.[151,1436,589,1893]" captionTargetPageId="5" captionText="FIGURE 3. A – B, Channelaxinus aff. excavatus, Oman margin; C – D, C. excavatus (Dall), holotype, United States National Museum 107449; E – F, C. adelaideana (Iredale), holotype, Australian Museum, C 32091; G, C. perplicata (Salas) as Cryptodon plicatus reproduced from Verrill &amp; Bush, 1898; H – I, C. benthicola (Iredale), holotype, Australian Museum C 47714." httpUri="https://zenodo.org/record/236860/files/figure.png" pageId="6" pageNumber="258">Figs 3</figureCitation>
C–D) and
<taxonomicName id="76FF0EEAFFE5E325FAE3FDE5FE67FDEB" authority="Valentich-Scott &amp; Coan, 2012" authorityName="Valentich-Scott &amp; Coan" authorityYear="2012" class="Bivalvia" family="Thyasiridae" genus="Channelaxinus" kingdom="Animalia" order="Lucinoida" pageId="6" pageNumber="258" phylum="Mollusca" rank="species" species="oliveri">
<emphasis id="838BA97BFFE5E325FAE3FDE5FA1CFDCF" box="[1328,1436,511,536]" italics="true" pageId="6" pageNumber="258">C. oliveri</emphasis>
<bibRefCitation id="D56E0898FFE5E325FF44FDC1FE67FDEB" author="Valentich-Scott" box="[151,487,548,573]" pageId="6" pageNumber="258" refString="Coan, E. V. &amp; Valentich-Scott, P. (2012) Bivalve Seashells of Tropical West America. Marine Bivalve Mollusks from Baja California to Northern Peru. Santa Barbara Museum of Natural History Monographs Number 6, Part 1, pp. 1 - 596." type="book chapter" year="2012">
Valentich-Scott &amp; Coan,
<quantity id="7607D88CFFE5E325FE7CFDC1FE67FDEB" box="[431,487,548,572]" metricMagnitude="1" metricUnit="m" metricValue="5.11048" pageId="6" pageNumber="258" unit="in" value="2012.0">2012</quantity>
</bibRefCitation>
</taxonomicName>
in
<bibRefCitation id="D56E0898FFE5E325FDDAFDC1FCD7FDEB" author="Coan" box="[521,855,548,573]" pageId="6" pageNumber="258" refString="Coan, E. V. &amp; Valentich-Scott, P. (2012) Bivalve Seashells of Tropical West America. Marine Bivalve Mollusks from Baja California to Northern Peru. Santa Barbara Museum of Natural History Monographs Number 6, Part 1, pp. 1 - 596." type="book chapter" year="2012">Coan &amp; Valentich-Scott 2012</bibRefCitation>
); Atlantic (
<taxonomicName id="76FF0EEAFFE5E325FC07FDC0FB6FFDEA" authority="Salas, 1996" authorityName="Salas" authorityYear="1996" box="[980,1263,548,573]" class="Bivalvia" family="Thyasiridae" genus="Channelaxinus" kingdom="Animalia" order="Lucinoida" pageId="6" pageNumber="258" phylum="Mollusca" rank="species" species="perplicata">
<emphasis id="838BA97BFFE5E325FC07FDC0FBE8FDEA" box="[980,1128,548,573]" italics="true" pageId="6" pageNumber="258">C. perplicata</emphasis>
<bibRefCitation id="D56E0898FFE5E325FBBEFDC1FB6FFDEA" author="Salas" box="[1133,1263,548,573]" pageId="6" pageNumber="258" refString="Salas, C. (1996) Marine Bivalves from off the Southern Iberian Peninsula collected by the Balgim and Fauna 1 expeditions. Haliotis, 25, 33 - 100." type="journal article" year="1996">Salas, 1996</bibRefCitation>
</taxonomicName>
) (
<figureCitation id="29C469ECFFE5E325FAD5FDC1FAC8FDEB" box="[1286,1352,548,573]" captionStart="FIGURE 3. A – B" captionStartId="5.[151,250,1914,1936]" captionTargetBox="[151,1436,589,1891]" captionTargetId="figure@5.[151,1436,589,1893]" captionTargetPageId="5" captionText="FIGURE 3. A – B, Channelaxinus aff. excavatus, Oman margin; C – D, C. excavatus (Dall), holotype, United States National Museum 107449; E – F, C. adelaideana (Iredale), holotype, Australian Museum, C 32091; G, C. perplicata (Salas) as Cryptodon plicatus reproduced from Verrill &amp; Bush, 1898; H – I, C. benthicola (Iredale), holotype, Australian Museum C 47714." httpUri="https://zenodo.org/record/236860/files/figure.png" pageId="6" pageNumber="258">Fig. 3</figureCitation>
G); and South
<collectingCountry id="C9E835F9FFE5E325FF33FDA2FEC7FDB7" box="[224,327,583,608]" name="Australia" pageId="6" pageNumber="258">Australia</collectingCountry>
(
<taxonomicName id="76FF0EEAFFE5E325FE8BFDA2FC8DFDB7" authority="Iredale, 1930" authorityName="Iredale" authorityYear="1930" box="[344,781,583,608]" class="Bivalvia" family="Thyasiridae" genus="Prothyasira" kingdom="Animalia" order="Lucinoida" pageId="6" pageNumber="258" phylum="Mollusca" rank="species" species="adelaideana">
<emphasis id="838BA97BFFE5E325FE8BFDA2FDF0FDB7" box="[344,624,583,608]" italics="true" pageId="6" pageNumber="258">Prothyasira adelaideana</emphasis>
<bibRefCitation id="D56E0898FFE5E325FDABFDA2FC8DFDB7" author="Iredale" box="[632,781,583,608]" pageId="6" pageNumber="258" refString="Iredale, T. (1930) More notes on the marine Mollusca of New South Wales. Records of the Australian Museum, 17, 384 - 407. http: // dx. doi. org / 10.3853 / J. 0067 - 1975.17.1930.773" type="journal article" year="1930">Iredale, 1930</bibRefCitation>
</taxonomicName>
(
<figureCitation id="29C469ECFFE5E325FCCEFDA2FCE3FDB7" box="[797,867,583,608]" captionStart="FIGURE 3. A – B" captionStartId="5.[151,250,1914,1936]" captionTargetBox="[151,1436,589,1891]" captionTargetId="figure@5.[151,1436,589,1893]" captionTargetPageId="5" captionText="FIGURE 3. A – B, Channelaxinus aff. excavatus, Oman margin; C – D, C. excavatus (Dall), holotype, United States National Museum 107449; E – F, C. adelaideana (Iredale), holotype, Australian Museum, C 32091; G, C. perplicata (Salas) as Cryptodon plicatus reproduced from Verrill &amp; Bush, 1898; H – I, C. benthicola (Iredale), holotype, Australian Museum C 47714." httpUri="https://zenodo.org/record/236860/files/figure.png" pageId="6" pageNumber="258">Figs 3</figureCitation>
E–F) and
<taxonomicName id="76FF0EEAFFE5E325FC05FDACFB7EFDB7" authority="Iredale 1930" authorityName="Iredale" authorityYear="1930" box="[982,1278,583,608]" class="Bivalvia" family="Thyasiridae" genus="Cryptodon" higherTaxonomySource="CoL" kingdom="Animalia" order="Lucinida" pageId="6" pageNumber="258" phylum="Mollusca" rank="species" species="benthicola">
<emphasis id="838BA97BFFE5E325FC05FDACFBE9FDB7" box="[982,1129,583,608]" italics="true" pageId="6" pageNumber="258">P. benthicola</emphasis>
<bibRefCitation id="D56E0898FFE5E325FBA2FDA2FB7EFDB7" author="Iredale" box="[1137,1278,583,608]" pageId="6" pageNumber="258" refString="Iredale, T. (1930) More notes on the marine Mollusca of New South Wales. Records of the Australian Museum, 17, 384 - 407. http: // dx. doi. org / 10.3853 / J. 0067 - 1975.17.1930.773" type="journal article" year="1930">Iredale 1930</bibRefCitation>
</taxonomicName>
(
<figureCitation id="29C469ECFFE5E325FADCFDA2FAD5FDB7" box="[1295,1365,583,608]" captionStart="FIGURE 3. A – B" captionStartId="5.[151,250,1914,1936]" captionTargetBox="[151,1436,589,1891]" captionTargetId="figure@5.[151,1436,589,1893]" captionTargetPageId="5" captionText="FIGURE 3. A – B, Channelaxinus aff. excavatus, Oman margin; C – D, C. excavatus (Dall), holotype, United States National Museum 107449; E – F, C. adelaideana (Iredale), holotype, Australian Museum, C 32091; G, C. perplicata (Salas) as Cryptodon plicatus reproduced from Verrill &amp; Bush, 1898; H – I, C. benthicola (Iredale), holotype, Australian Museum C 47714." httpUri="https://zenodo.org/record/236860/files/figure.png" pageId="6" pageNumber="258">Figs 3</figureCitation>
H–I)).
<bibRefCitation id="D56E0898FFE5E325FF44FD89FE1CFD53" author="Oliver" box="[151,412,620,645]" pageId="6" pageNumber="258" refString="Oliver, P. G. &amp; Frey, M. A. (2014) Ascetoaxinus quatsinosensis sp. et gen. nov. (Bivalvia: Thyasiroidea) from Vancouver Island, with notes on Conchocele Gabb, 1866 and Channelaxinus Valentich-Scott &amp; Coan, 2012. Zootaxa, 3869 (4), 452 - 468. http: // dx. doi. org / 10.11646 / zootaxa. 3869.4.8" type="journal article" year="2014">Oliver &amp; Frey (2014)</bibRefCitation>
tentatively linked
<taxonomicName id="76FF0EEAFFE5E325FD52FD89FC1FFD53" box="[641,927,620,645]" class="Bivalvia" family="Thyasiridae" genus="Cryptodon" higherTaxonomySource="CoL" kingdom="Animalia" order="Lucinida" pageId="6" pageNumber="258" phylum="Mollusca" rank="species" species="investigatoris">
<emphasis id="838BA97BFFE5E325FD52FD89FC1FFD53" box="[641,927,620,645]" italics="true" pageId="6" pageNumber="258">Cryptodon investigatoris</emphasis>
</taxonomicName>
and
<taxonomicName id="76FF0EEAFFE5E325FC37FD89FAEAFD53" authority="Habe, 1981" authorityName="Habe" authorityYear="1981" box="[996,1386,620,645]" class="Bivalvia" family="Thyasiridae" genus="Conchocele" kingdom="Animalia" order="Lucinoida" pageId="6" pageNumber="258" phylum="Mollusca" rank="species" species="koyamai">
<emphasis id="838BA97BFFE5E325FC37FD89FB55FD52" box="[996,1237,620,645]" italics="true" pageId="6" pageNumber="258">Conchocele koyamai</emphasis>
<bibRefCitation id="D56E0898FFE5E325FB31FD89FAEAFD53" author="Habe" box="[1250,1386,620,645]" pageId="6" pageNumber="258" refString="Habe, T. A. (1981) Catalogue of molluscs of Wakayama prefecture, the province of Kii. I. Bivalvia, Scaphopoda and Cephalopoda. Publications of the Seto Marine Biological Laboratory. Special Publication Series, 7, xiii - 264." type="journal volume" year="1981">Habe, 1981</bibRefCitation>
</taxonomicName>
but although they have deep posterior sulci and excavated lunule they are strongly oblique in outline.
<bibRefCitation id="D56E0898FFE5E325FAD6FD6AFA1CFD7F" author="Smith" box="[1285,1436,655,680]" pageId="6" pageNumber="258" refString="Smith, E. A. (1896) Natural history notes from H. M. Indian Marine Survey Steamer ' Investigator', Commander C. F. Oldham, R. N. - Series II, No. 22. Descriptions of new Deep-sea Mollusca. Annals and Magazine of Natural History, 6 (18), 367 - 375." type="journal article" year="1896">Smith (1896)</bibRefCitation>
reported on a small shell of
<taxonomicName id="76FF0EEAFFE5E325FE1CFD50FD07FD1B" box="[463,647,693,716]" class="Bivalvia" family="Thyasiridae" genus="Cryptodon" higherTaxonomySource="CoL" kingdom="Animalia" order="Lucinida" pageId="6" pageNumber="258" phylum="Mollusca" rank="species" species="investigatoris">
<emphasis id="838BA97BFFE5E325FE1CFD50FD07FD1B" box="[463,647,693,716]" italics="true" pageId="6" pageNumber="258">C. investigatoris</emphasis>
</taxonomicName>
which was not oblique and concluded that there was strong allometric growth, shells becoming proportionately longer with age. Comparing the current specimen with the growth lines on
<taxonomicName id="76FF0EEAFFE5E325FF44FD18FED2FCC3" box="[151,338,765,788]" class="Bivalvia" family="Thyasiridae" genus="Cryptodon" higherTaxonomySource="CoL" kingdom="Animalia" order="Lucinida" pageId="6" pageNumber="258" phylum="Mollusca" rank="species" species="investigatoris">
<emphasis id="838BA97BFFE5E325FF44FD18FED2FCC3" box="[151,338,765,788]" italics="true" pageId="6" pageNumber="258">C. investigatoris</emphasis>
</taxonomicName>
shells reveals that the oblique form is already developed at this size suggesting that the current shell is not a juvenile of
<taxonomicName id="76FF0EEAFFE5E325FE79FCC5FDE3FCEF" box="[426,611,800,824]" class="Bivalvia" family="Thyasiridae" genus="Cryptodon" higherTaxonomySource="CoL" kingdom="Animalia" order="Lucinida" pageId="6" pageNumber="258" phylum="Mollusca" rank="species" species="investigatoris">
<emphasis id="838BA97BFFE5E325FE79FCC5FDE3FCEF" box="[426,611,800,824]" italics="true" pageId="6" pageNumber="258">C. investigatoris</emphasis>
</taxonomicName>
.
</paragraph>
<paragraph id="B1407569FFE5E325FF14FCA1FF76FC57" blockId="6.[151,1437,151,1077]" pageId="6" pageNumber="258">With only a single shell at hand and the close similarities with the above species a conclusion cannot be reached.</paragraph>
<paragraph id="B1407569FFE5E325FF14FC69FEE3FBE3" blockId="6.[151,1437,151,1077]" pageId="6" pageNumber="258">
<bibRefCitation id="D56E0898FFE5E325FF14FC69FEEAFC73" author="Iredale" box="[199,362,908,933]" pageId="6" pageNumber="258" refString="Iredale, T. (1930) More notes on the marine Mollusca of New South Wales. Records of the Australian Museum, 17, 384 - 407. http: // dx. doi. org / 10.3853 / J. 0067 - 1975.17.1930.773" type="journal article" year="1930">Iredale (1930)</bibRefCitation>
placed both
<taxonomicName id="76FF0EEAFFE5E325FDD6FC69FD10FC72" box="[517,656,908,933]" class="Bivalvia" family="Thyasiridae" genus="Prothyasira" kingdom="Animalia" order="Lucinoida" pageId="6" pageNumber="258" phylum="Mollusca" rank="species" species="adelaideana">
<emphasis id="838BA97BFFE5E325FDD6FC69FD10FC72" box="[517,656,908,933]" italics="true" pageId="6" pageNumber="258">adelaideana</emphasis>
</taxonomicName>
and
<taxonomicName id="76FF0EEAFFE5E325FD1DFC69FCC4FC72" box="[718,836,908,933]" class="Bivalvia" family="Thyasiridae" genus="Cryptodon" higherTaxonomySource="CoL" kingdom="Animalia" order="Lucinida" pageId="6" pageNumber="258" phylum="Mollusca" rank="species" species="benthicola">
<emphasis id="838BA97BFFE5E325FD1DFC69FCC4FC72" box="[718,836,908,933]" italics="true" pageId="6" pageNumber="258">benthicola</emphasis>
</taxonomicName>
in his new genus
<taxonomicName id="76FF0EEAFFE5E325FBF2FC69FB26FC72" box="[1057,1190,908,933]" class="Bivalvia" family="Thyasiridae" genus="Prothyasira" kingdom="Animalia" order="Lucinoida" pageId="6" pageNumber="258" phylum="Mollusca" rank="genus">
<emphasis id="838BA97BFFE5E325FBF2FC69FB26FC72" box="[1057,1190,908,933]" italics="true" pageId="6" pageNumber="258">Prothyasira</emphasis>
</taxonomicName>
. The
<typeStatus id="6E44CBCBFFE5E325FB3DFC68FA9EFC72" box="[1262,1310,909,933]" pageId="6" pageNumber="258">type</typeStatus>
species of
<taxonomicName id="76FF0EEAFFE5E325FF44FC4AFE9CFC1F" box="[151,284,943,968]" class="Bivalvia" family="Thyasiridae" genus="Prothyasira" kingdom="Animalia" order="Lucinoida" pageId="6" pageNumber="258" phylum="Mollusca" rank="genus">
<emphasis id="838BA97BFFE5E325FF44FC4AFE9CFC1F" box="[151,284,943,968]" italics="true" pageId="6" pageNumber="258">Prothyasira</emphasis>
</taxonomicName>
is
<taxonomicName id="76FF0EEAFFE5E325FE93FC54FE50FC1F" box="[320,464,945,968]" class="Bivalvia" family="Thyasiridae" genus="Prothyasira" kingdom="Animalia" order="Lucinoida" pageId="6" pageNumber="258" phylum="Mollusca" rank="species" species="peroniana">
<emphasis id="838BA97BFFE5E325FE93FC54FE50FC1F" box="[320,464,945,968]" italics="true" pageId="6" pageNumber="258">P. peroniana</emphasis>
</taxonomicName>
(
<bibRefCitation id="D56E0898FFE5E325FE32FC4AFDF1FC1F" author="Iredale" box="[481,625,943,968]" pageId="6" pageNumber="258" refString="Iredale, T. (1930) More notes on the marine Mollusca of New South Wales. Records of the Australian Museum, 17, 384 - 407. http: // dx. doi. org / 10.3853 / J. 0067 - 1975.17.1930.773" type="journal article" year="1930">Iredale 1930</bibRefCitation>
but while having a very deep posterior sulcus the lunule is not deeply sunken or demarcated by a strong ridge and there are no flattened anterior and posterior zones. These differences suggest that
<taxonomicName id="76FF0EEAFFE5E325FEF0FC12FE28FBC7" box="[291,424,1015,1040]" class="Bivalvia" family="Thyasiridae" genus="Prothyasira" kingdom="Animalia" order="Lucinoida" pageId="6" pageNumber="258" phylum="Mollusca" rank="genus">
<emphasis id="838BA97BFFE5E325FEF0FC12FE28FBC7" box="[291,424,1015,1040]" italics="true" pageId="6" pageNumber="258">Prothyasira</emphasis>
</taxonomicName>
and
<taxonomicName id="76FF0EEAFFE5E325FE0DFC12FD06FBC7" box="[478,646,1015,1040]" class="Bivalvia" family="Thyasiridae" genus="Channelaxinus" kingdom="Animalia" order="Lucinoida" pageId="6" pageNumber="258" phylum="Mollusca" rank="genus">
<emphasis id="838BA97BFFE5E325FE0DFC12FD06FBC7" box="[478,646,1015,1040]" italics="true" pageId="6" pageNumber="258">Channelaxinus</emphasis>
</taxonomicName>
are not congeneric and that
<taxonomicName id="76FF0EEAFFE5E325FC10FC12FBCEFBC7" box="[963,1102,1015,1040]" class="Bivalvia" family="Thyasiridae" genus="Prothyasira" kingdom="Animalia" order="Lucinoida" pageId="6" pageNumber="258" phylum="Mollusca" rank="species" species="adelaideana">
<emphasis id="838BA97BFFE5E325FC10FC12FBCEFBC7" box="[963,1102,1015,1040]" italics="true" pageId="6" pageNumber="258">adelaideana</emphasis>
</taxonomicName>
and
<taxonomicName id="76FF0EEAFFE5E325FB57FC12FB7AFBC7" box="[1156,1274,1015,1040]" class="Bivalvia" family="Thyasiridae" genus="Cryptodon" higherTaxonomySource="CoL" kingdom="Animalia" order="Lucinida" pageId="6" pageNumber="258" phylum="Mollusca" rank="species" species="benthicola">
<emphasis id="838BA97BFFE5E325FB57FC12FB7AFBC7" box="[1156,1274,1015,1040]" italics="true" pageId="6" pageNumber="258">benthicola</emphasis>
</taxonomicName>
be transferred to
<taxonomicName id="76FF0EEAFFE5E325FF67FBF9FEDCFBE2" box="[180,348,1052,1077]" class="Bivalvia" family="Thyasiridae" genus="Channelaxinus" kingdom="Animalia" order="Lucinoida" pageId="6" pageNumber="258" phylum="Mollusca" rank="genus">
<emphasis id="838BA97BFFE5E325FF67FBF9FEDCFBE2" box="[180,348,1052,1077]" italics="true" pageId="6" pageNumber="258">Channelaxinus</emphasis>
</taxonomicName>
.
</paragraph>
</subSubSection>
</treatment>
</document>
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