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<document ID-DOI="10.5252/z2010n2a6" ID-GBIF-Dataset="e5f0fd86-cd64-4bc7-a687-728b198598cb" ID-ISSN="1638-9387" ID-Zenodo-Dep="4521132" checkinTime="1612809588453" checkinUser="felipe" docAuthor="Dijkstra, Henk H. &amp; Maestrati, Philippe" docDate="2010" docId="D75887E7FFDA074A175EF98FFEF8FAD7" docLanguage="en" docName="Zoosystema.32.2.333-358.pdf" docOrigin="Zoosystema 32 (2)" docSource="http://www.bioone.org/doi/abs/10.5252/z2010n2a6" docStyle="DocumentStyle:E638A3C99FA728B529662B46F84D75FD.1:Zoosystema.2009-2010.journal_article" docStyleId="E638A3C99FA728B529662B46F84D75FD" docStyleName="Zoosystema.2009-2010.journal_article" docStyleVersion="1" docTitle="Cyclopecten ambiguus Dijkstra &amp; Maestrati 2010, n. sp." docType="treatment" docVersion="9" lastPageNumber="341" masterDocId="2B61FF9FFFDD07421446FF85FA42FFB0" masterDocTitle="Pectinoidea (Mollusca, Bivalvia, Propeamussiidae, Entoliidae and Pectinidae) from the Austral Islands (French Polynesia)" masterLastPageNumber="358" masterPageNumber="333" pageNumber="340" updateTime="1683578100964" updateUser="ExternalLinkService" zenodo-license-document="CC0-1.0" zenodo-license-figures="CC0-1.0" zenodo-license-treatments="UNSPECIFIED">
<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo>
<mods:title>Pectinoidea (Mollusca, Bivalvia, Propeamussiidae, Entoliidae and Pectinidae) from the Austral Islands (French Polynesia)</mods:title>
</mods:titleInfo>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Dijkstra, Henk H.</mods:namePart>
<mods:affiliation>Zoological Museum, University of Amsterdam, Mauritskade 61, NL- 1092 AD Amsterdam (The Netherlands) h. h. dijkstra @ uva. nl</mods:affiliation>
<mods:nameIdentifier type="email">dijkstra@uva.nl</mods:nameIdentifier>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Maestrati, Philippe</mods:namePart>
<mods:affiliation>Muséum national dHistoire naturelle, Département Systématique et Évolution UMR 7138 Exploration de la Biodiversité case postale 51, 57 rue Cuvier, F- 75231 Paris cedex 05 (France) maestrat @ mnhn. fr</mods:affiliation>
<mods:nameIdentifier type="email">maestrat@mnhn.fr</mods:nameIdentifier>
</mods:name>
<mods:typeOfResource>text</mods:typeOfResource>
<mods:relatedItem type="host">
<mods:titleInfo>
<mods:title>Zoosystema</mods:title>
</mods:titleInfo>
<mods:part>
<mods:date>2010</mods:date>
<mods:detail type="pubDate">
<mods:number>2010-06-30</mods:number>
</mods:detail>
<mods:detail type="volume">
<mods:number>32</mods:number>
</mods:detail>
<mods:detail type="issue">
<mods:number>2</mods:number>
</mods:detail>
<mods:extent unit="page">
<mods:start>333</mods:start>
<mods:end>358</mods:end>
</mods:extent>
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<mods:location>
<mods:url>http://www.bioone.org/doi/abs/10.5252/z2010n2a6</mods:url>
</mods:location>
<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">10.5252/z2010n2a6</mods:identifier>
<mods:identifier type="GBIF-Dataset">e5f0fd86-cd64-4bc7-a687-728b198598cb</mods:identifier>
<mods:identifier type="ISSN">1638-9387</mods:identifier>
<mods:identifier type="Zenodo-Dep">4521132</mods:identifier>
</mods:mods>
<treatment ID-DOI="http://doi.org/10.5281/zenodo.4551992" ID-GBIF-Taxon="177429111" ID-Zenodo-Dep="4551992" LSID="urn:lsid:zoobank.org:act:3F3E6E7B-C510-4884-B33F-63A93161AA06" httpUri="http://treatment.plazi.org/id/D75887E7FFDA074A175EF98FFEF8FAD7" lastPageId="8" lastPageNumber="341" pageId="7" pageNumber="340">
<subSubSection box="[792,1095,1546,1573]" pageId="7" pageNumber="340" type="nomenclature">
<paragraph blockId="7.[792,1095,1546,1573]" box="[792,1095,1546,1573]" pageId="7" pageNumber="340">
<heading box="[792,1095,1546,1573]" centered="true" fontSize="11" level="2" pageId="7" pageNumber="340" reason="2">
<taxonomicName authority="Dijkstra &amp; Maestrati, 2010" authorityName="Dijkstra &amp; Maestrati" authorityYear="2010" box="[792,1029,1546,1573]" class="Bivalvia" family="Propeamussiidae" genus="Cyclopecten" kingdom="Animalia" order="Pectinoida" pageId="7" pageNumber="340" phylum="Mollusca" rank="species" species="ambiguus" status="n. sp.">
<emphasis bold="true" box="[792,1029,1546,1573]" italics="true" pageId="7" pageNumber="340">Cyclopecten ambiguus</emphasis>
</taxonomicName>
<taxonomicNameLabel box="[1036,1095,1546,1573]" pageId="7" pageNumber="340" rank="species">n. sp.</taxonomicNameLabel>
</heading>
</paragraph>
</subSubSection>
<subSubSection box="[882,1004,1578,1605]" pageId="7" pageNumber="340" type="description">
<paragraph blockId="7.[882,1004,1578,1605]" box="[882,1004,1578,1605]" pageId="7" pageNumber="340">
<heading box="[882,1004,1578,1605]" centered="true" fontSize="11" level="2" pageId="7" pageNumber="340" reason="2">
(
<figureCitation box="[889,951,1578,1605]" captionStart="FIG" captionStartId="4.[113,124,1589,1606]" captionTargetBox="[191,1121,228,1540]" captionTargetId="figure-17@4.[186,1137,214,1560]" captionTargetPageId="4" captionText="FIG. 2.— A-E, Parvamussium australanum n. sp.;A, B, holotype,external and internal views of the left valve;C, D, holotype,external and internal views of the right valve; E, details of the left valve; F-J, Parvamussium dautzenbergi (Dijkstra,1990); F, G, external and internal views of the left valve; H, I, external and internal views of the right valve; J, details of the left valve; K-P, Cyclopecten ambiguus n. sp.; K, L, holotype,external (SEM) and internal views of the left valve;M, N, external and internal views of the right valve;O, prodissoconch and early stage of the left valve (SEM); P, details of the left valve (SEM). Scale bars: O, 100 μm, P, 200 μm." figureDoi="http://doi.org/10.5281/zenodo.4521136" httpUri="https://zenodo.org/record/4521136/files/figure.png" pageId="7" pageNumber="340">Fig. 2</figureCitation>
K-P)
</heading>
</paragraph>
</subSubSection>
<subSubSection pageId="7" pageNumber="340" type="reference_group">
<paragraph blockId="7.[677,1209,1648,1699]" pageId="7" pageNumber="340">
<treatmentCitationGroup pageId="7" pageNumber="340">
<taxonomicName authorityName="Dijkstra" authorityYear="1991" box="[677,870,1648,1672]" class="Bivalvia" family="Propeamussiidae" genus="Cyclopecten" kingdom="Animalia" order="Pectinoida" pageId="7" pageNumber="340" phylum="Mollusca" rank="species" species="cancellus">
<emphasis box="[677,870,1648,1672]" italics="true" pageId="7" pageNumber="340">Cyclopecten cancellus</emphasis>
</taxonomicName>
<treatmentCitation author="TRONDLE J. &amp; BOUTET M." box="[892,1145,1648,1672]" page="6" pageId="7" pageNumber="340" year="2009">
<bibRefCitation author="TRONDLE J. &amp; BOUTET M." box="[892,1145,1648,1672]" pageId="7" pageNumber="340" pagination="1 - 87" refId="ref22603" refString="TRONDLE J. &amp; BOUTET M. 2009. - Inventory of marine molluscs of French Polynesia. Atoll Research Bulletin 570: 1 - 87." type="journal article" year="2009">Tröndlé &amp; Boutet 2009: 6</bibRefCitation>
</treatmentCitation>
[listed from Austral Is as
<taxonomicName authorityName="Dijkstra" authorityYear="1991" box="[854,964,1675,1699]" class="Bivalvia" family="Propeamussiidae" genus="Cyclopecten" kingdom="Animalia" order="Pectinoida" pageId="7" pageNumber="340" phylum="Mollusca" rank="species" species="cancellus">
<emphasis box="[854,964,1675,1699]" italics="true" pageId="7" pageNumber="340">C. cancellus</emphasis>
</taxonomicName>
].
</treatmentCitationGroup>
</paragraph>
</subSubSection>
<subSubSection pageId="8" pageNumber="341" type="materials_examined">
<paragraph blockId="8.[111,647,215,319]" pageId="8" pageNumber="341">
TYPE MATERIAL. —
<emphasis bold="true" box="[293,348,215,239]" pageId="8" pageNumber="341">Rapa.</emphasis>
Atelier RAPA stn 43,
<geoCoordinate box="[548,642,215,239]" degrees="27" direction="south" minutes="36.8" orientation="latitude" pageId="8" pageNumber="341" precision="92" value="-27.613333">27°36.8S</geoCoordinate>
,
<geoCoordinate box="[111,226,242,266]" degrees="144" direction="west" minutes="18.3" orientation="longitude" pageId="8" pageNumber="341" precision="92" value="-144.305">144°18.3W</geoCoordinate>
,
<quantity box="[233,282,242,266]" metricMagnitude="1" metricUnit="m" metricValue="4.5" pageId="8" pageNumber="341" unit="m" value="45.0">45 m</quantity>
,
<typeStatus box="[290,371,242,266]" pageId="8" pageNumber="341">holotype</typeStatus>
lv (
<collectionCode box="[403,484,242,266]" country="France" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34988" lsid="urn:lsid:biocol.org:col:34988" name="Museum National d'Histoire Naturelle" pageId="8" pageNumber="341">MNHN</collectionCode>
21385).— Same data,
<typeStatus box="[167,261,268,292]" pageId="8" pageNumber="341">paratypes</typeStatus>
,
<specimenCount box="[273,311,268,292]" pageId="8" pageNumber="341" type="larva">3 lv</specimenCount>
, 4 rv (4
<collectionCode box="[400,483,268,292]" country="France" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34988" lsid="urn:lsid:biocol.org:col:34988" name="Museum National d'Histoire Naturelle" pageId="8" pageNumber="341">MNHN</collectionCode>
21386, 2
<collectionCode box="[589,644,268,292]" country="Netherlands" httpUri="http://grbio.org/cool/a65z-wv6r" name="Universiteit van Amsterdam, Zoologisch Museum" pageId="8" pageNumber="341">ZMA</collectionCode>
Moll. 4.09.011, 1 NMNZ M.287778).
</paragraph>
<paragraph blockId="8.[112,646,341,418]" pageId="8" pageNumber="341">
<typeStatus box="[113,162,341,365]" pageId="8" pageNumber="341">TYPE</typeStatus>
LOCALITY. — Austral Islands, Rapa Island, Baie de Haurei,
<geoCoordinate box="[194,293,367,391]" degrees="27" direction="south" minutes="36.8" orientation="latitude" pageId="8" pageNumber="341" precision="92" value="-27.613333">27°36.8S</geoCoordinate>
,
<geoCoordinate box="[304,424,367,391]" degrees="144" direction="west" minutes="18.3" orientation="longitude" pageId="8" pageNumber="341" precision="92" value="-144.305">144°18.3W</geoCoordinate>
,
<quantity box="[436,489,367,391]" metricMagnitude="1" metricUnit="m" metricValue="4.5" pageId="8" pageNumber="341" unit="m" value="45.0">45 m</quantity>
(Atelier RAPA, stn 43).
</paragraph>
</subSubSection>
<subSubSection pageId="8" pageNumber="341" type="etymology">
<paragraph blockId="8.[112,647,440,543]" pageId="8" pageNumber="341">
ETYMOLOGY. — From the transforming sculpture (commarginal in juvenile stage, reticular in adult stage) on the left valve (Latin
<taxonomicName authorityName="Dijkstra &amp; Maestrati" authorityYear="2010" box="[263,351,492,516]" class="Bivalvia" family="Propeamussiidae" genus="Cyclopecten" kingdom="Animalia" order="Pectinoida" pageId="8" pageNumber="341" phylum="Mollusca" rank="species" species="ambiguus">
<emphasis box="[263,351,492,516]" italics="true" pageId="8" pageNumber="341">ambiguus</emphasis>
</taxonomicName>
, adjective meaning changeable, variable or inconstant).
</paragraph>
<paragraph blockId="8.[112,648,565,748]" pageId="8" pageNumber="341">
OTHER MATERIAL EXAMINED. —
<emphasis bold="true" box="[441,498,565,589]" pageId="8" pageNumber="341">Rapa.</emphasis>
Atelier RAPA, stn 30,
<geoCoordinate box="[189,287,592,616]" degrees="27" direction="south" minutes="38.2" orientation="latitude" pageId="8" pageNumber="341" precision="92" value="-27.636667">27°38.2S</geoCoordinate>
,
<geoCoordinate box="[297,417,592,616]" degrees="144" direction="west" minutes="18.2" orientation="longitude" pageId="8" pageNumber="341" precision="92" value="-144.30333">144°18.2W</geoCoordinate>
,
<quantity box="[427,515,592,616]" metricMagnitude="1" metricUnit="m" metricValue="1.8" metricValueMax="2.0" metricValueMin="1.6" pageId="8" pageNumber="341" unit="m" value="18.0" valueMax="20.0" valueMin="16.0">16-20 m</quantity>
,
<specimenCount box="[525,563,592,616]" pageId="8" pageNumber="341" type="larva">7 lv</specimenCount>
, 2 rv. — Stn 44,
<geoCoordinate box="[191,289,618,642]" degrees="27" direction="south" minutes="36.3" orientation="latitude" pageId="8" pageNumber="341" precision="92" value="-27.605">27°36.3S</geoCoordinate>
,
<geoCoordinate box="[300,420,618,642]" degrees="144" direction="west" minutes="18.2" orientation="longitude" pageId="8" pageNumber="341" precision="92" value="-144.30333">144°18.2W</geoCoordinate>
,
<quantity box="[430,484,618,642]" metricMagnitude="1" metricUnit="m" metricValue="3.0" pageId="8" pageNumber="341" unit="m" value="30.0">30 m</quantity>
,
<specimenCount box="[495,534,618,642]" pageId="8" pageNumber="341" type="larva">4 lv</specimenCount>
. — Stn 47,
<geoCoordinate box="[114,209,645,669]" degrees="27" direction="south" minutes="36.7" orientation="latitude" pageId="8" pageNumber="341" precision="92" value="-27.611668">27°36.7S</geoCoordinate>
,
<geoCoordinate box="[217,334,645,669]" degrees="144" direction="west" minutes="19.1" orientation="longitude" pageId="8" pageNumber="341" precision="92" value="-144.31833">144°19.1W</geoCoordinate>
,
<quantity box="[342,393,645,669]" metricMagnitude="1" metricUnit="m" metricValue="3.3" pageId="8" pageNumber="341" unit="m" value="33.0">33 m</quantity>
, 1 rv. — Stn 48,
<geoCoordinate box="[547,643,645,669]" degrees="27" direction="south" minutes="34.1" orientation="latitude" pageId="8" pageNumber="341" precision="92" value="-27.568333">27°34.1S</geoCoordinate>
,
<geoCoordinate box="[112,232,671,695]" degrees="144" direction="west" minutes="22.1" orientation="longitude" pageId="8" pageNumber="341" precision="92" value="-144.36833">144°22.1W</geoCoordinate>
,
<quantity box="[241,295,671,695]" metricMagnitude="1" metricUnit="m" metricValue="3.6" pageId="8" pageNumber="341" unit="m" value="36.0">36 m</quantity>
,
<specimenCount box="[306,343,671,695]" pageId="8" pageNumber="341" type="larva">5 lv</specimenCount>
, 3 rv (1 ZMA).
<subSubSection pageId="8" pageNumber="341" type="description">
<emphasis bold="true" box="[113,241,697,721]" pageId="8" pageNumber="341">Banc Arago.</emphasis>
BENTHAUS, stn DW 1979,
<geoCoordinate box="[561,641,697,721]" degrees="23" direction="south" minutes="22" orientation="latitude" pageId="8" pageNumber="341" precision="925" value="-23.366667">23°22S</geoCoordinate>
,
<geoCoordinate box="[115,216,724,748]" degrees="150" direction="west" minutes="44" orientation="longitude" pageId="8" pageNumber="341" precision="925" value="-150.73334">150°44W</geoCoordinate>
,
<quantity box="[226,339,724,748]" metricMagnitude="2" metricUnit="m" metricValue="2.58" metricValueMax="3.4" metricValueMin="1.76" pageId="8" pageNumber="341" unit="m" value="258.0" valueMax="340.0" valueMin="176.0">176-340 m</quantity>
,
<specimenCount box="[349,387,724,748]" pageId="8" pageNumber="341" type="larva">1 lv</specimenCount>
.
</subSubSection>
</paragraph>
</subSubSection>
<subSubSection pageId="8" pageNumber="341" type="distribution">
<paragraph blockId="8.[113,646,770,820]" pageId="8" pageNumber="341">
DISTRIBUTION. — Austral Islands, only single valves at
<quantity box="[113,211,796,820]" metricMagnitude="1" metricUnit="m" metricValue="9.6" metricValueMax="17.6" metricValueMin="1.6" pageId="8" pageNumber="341" unit="m" value="96.0" valueMax="176.0" valueMin="16.0">16-176 m</quantity>
depth.
</paragraph>
</subSubSection>
<subSubSection pageId="8" pageNumber="341" type="description">
<paragraph blockId="8.[111,648,849,1573]" box="[113,258,849,876]" pageId="8" pageNumber="341">DESCRIPTION</paragraph>
<paragraph blockId="8.[111,648,849,1573]" pageId="8" pageNumber="341">
Shell up to
<emphasis box="[247,257,882,907]" italics="true" pageId="8" pageNumber="341">c</emphasis>
.
<quantity box="[273,341,881,908]" metricMagnitude="-3" metricUnit="m" metricValue="4.0" pageId="8" pageNumber="341" unit="mm" value="4.0">4 mm</quantity>
high, circular, inequivalve, equilateral, left valve slightly more inflated than right valve (nearly flat), auricles nearly equal in size, unequal in shape, opaque whitish (lv), translucent (rv).
</paragraph>
<paragraph blockId="8.[111,648,849,1573]" pageId="8" pageNumber="341">
Left valve disc sculpture commencing immediately by very closely spaced commarginal lirae (
<emphasis box="[556,573,1040,1065]" italics="true" pageId="8" pageNumber="341">c.</emphasis>
20 per mm) to
<quantity box="[201,265,1071,1098]" metricMagnitude="-3" metricUnit="m" metricValue="1.0" pageId="8" pageNumber="341" unit="mm" value="1.0">1 mm</quantity>
from the top margin, followed by a reticulate sculpture of widely spaced radial lirae (12 or 13) and overrunning commarginal lirae (
<emphasis box="[571,588,1135,1160]" italics="true" pageId="8" pageNumber="341">c.</emphasis>
5 per mm), forming weak nodules on the intersections. Secondary intercalated radial lirae commence on the central part of the disc. Anterior and posterior auricle with 4 or 5 strongly developed commarginal lirae and one weak radial lira.
</paragraph>
<paragraph blockId="8.[111,648,849,1573]" pageId="8" pageNumber="341">Right valve disc with very closely spaced commarginal lirae in early growth stage, gradually slightly wider to the ventral margin. Auricles with strong commarginal lirae (numerous on anterior, 9 or 10 on posterior).Hinge line straight. Byssal notch relatively deep, byssal fasciole rather broad. Internal rudimentary riblets near ventral area in adult stage.</paragraph>
<paragraph blockId="8.[111,648,849,1573]" box="[136,647,1546,1573]" pageId="8" pageNumber="341">
Dimensions of
<typeStatus box="[295,390,1546,1573]" pageId="8" pageNumber="341">holotype</typeStatus>
: H 3.0 mm, W 3.0 mm.
</paragraph>
</subSubSection>
<subSubSection pageId="8" pageNumber="341" type="discussion">
<paragraph blockId="8.[111,647,1610,1700]" box="[113,213,1610,1637]" pageId="8" pageNumber="341">REMARKS</paragraph>
<paragraph blockId="8.[111,647,1610,1700]" lastBlockId="8.[674,1212,216,1383]" pageId="8" pageNumber="341">
The present species is morphologically closest (similar size, shape and reticulated sculpture) to
<taxonomicName authority="Dijkstra, 1991" authorityName="Dijkstra" authorityYear="1991" box="[529,944,216,1699]" class="Bivalvia" family="Propeamussiidae" genus="Cyclopecten" kingdom="Animalia" order="Pectinoida" pageId="8" pageNumber="341" phylum="Mollusca" rank="species" species="cancellus">
<emphasis box="[529,768,216,1699]" italics="true" pageId="8" pageNumber="341">Cyclopecten cancellus</emphasis>
<bibRefCitation author="DIJKSTRA H. H." box="[778,944,216,243]" pageId="8" pageNumber="341" pagination="1 - 57" refId="ref20555" refString="DIJKSTRA H. H. 1991. - A contribution to the knowledge of the pectinacean Mollusca (Bivalvia: Propeamussiidae, Entoliidae, Pectinidae) from the Indonesian Archipelago. Zoologische Verhandelingen 271: 1 - 57." type="journal article" year="1991">Dijkstra, 1991</bibRefCitation>
</taxonomicName>
, from the southwestern Pacific (and was indeed listed from the Australs by Tröndlé &amp; Boutet as
<taxonomicName authorityName="Dijkstra" authorityYear="1991" box="[947,1072,279,306]" class="Bivalvia" family="Propeamussiidae" genus="Cyclopecten" kingdom="Animalia" order="Pectinoida" pageId="8" pageNumber="341" phylum="Mollusca" rank="species" species="cancellus">
<emphasis box="[947,1072,279,306]" italics="true" pageId="8" pageNumber="341">C. cancellus</emphasis>
</taxonomicName>
), but differs in having very closely spaced lirae in early growth stage (
<emphasis box="[747,764,343,368]" italics="true" pageId="8" pageNumber="341">c.</emphasis>
20 per mm in
<taxonomicName authorityName="Dijkstra &amp; Maestrati" authorityYear="2010" box="[936,1070,342,369]" class="Bivalvia" family="Propeamussiidae" genus="Cyclopecten" kingdom="Animalia" order="Pectinoida" pageId="8" pageNumber="341" phylum="Mollusca" rank="species" species="ambiguus">
<emphasis box="[936,1070,342,369]" italics="true" pageId="8" pageNumber="341">C. ambiguus</emphasis>
</taxonomicName>
, vs
<emphasis box="[1116,1132,343,368]" italics="true" pageId="8" pageNumber="341">c.</emphasis>
6 or
<quantity metricMagnitude="-1" metricUnit="m" metricValue="1.778" pageId="8" pageNumber="341" unit="in" value="7.0">7 in</quantity>
<taxonomicName authorityName="Dijkstra" authorityYear="1991" box="[706,829,374,401]" class="Bivalvia" family="Propeamussiidae" genus="Cyclopecten" kingdom="Animalia" order="Pectinoida" pageId="8" pageNumber="341" phylum="Mollusca" rank="species" species="cancellus">
<emphasis box="[706,829,374,401]" italics="true" pageId="8" pageNumber="341">C. cancellus</emphasis>
</taxonomicName>
), a weaker sculpture of radial lirae, lacking radial sculpture on the auricles (
<taxonomicName authorityName="Dijkstra" authorityYear="1991" box="[1091,1209,406,432]" class="Bivalvia" family="Propeamussiidae" genus="Cyclopecten" kingdom="Animalia" order="Pectinoida" pageId="8" pageNumber="341" phylum="Mollusca" rank="species" species="cancellus">
<emphasis box="[1091,1209,406,432]" italics="true" pageId="8" pageNumber="341">C. cancellus</emphasis>
</taxonomicName>
2 or 3), and rudimentary inner riblets (usually lacking in typical
<taxonomicName authorityName="Dijkstra" authorityYear="1991" box="[868,991,469,496]" class="Bivalvia" family="Propeamussiidae" genus="Cyclopecten" kingdom="Animalia" order="Pectinoida" pageId="8" pageNumber="341" phylum="Mollusca" rank="species" species="cancellus">
<emphasis box="[868,991,469,496]" italics="true" pageId="8" pageNumber="341">C. cancellus</emphasis>
</taxonomicName>
).
</paragraph>
</subSubSection>
<subSubSection pageId="8" pageNumber="341" type="reference_group">
<paragraph blockId="8.[674,1212,216,1383]" pageId="8" pageNumber="341">
<taxonomicName authority="(Melvill, 1907)" baseAuthorityName="Melvill" baseAuthorityYear="1907" box="[699,1099,501,528]" class="Bivalvia" family="Propeamussiidae" genus="Cyclopecten" kingdom="Animalia" order="Pectinoida" pageId="8" pageNumber="341" phylum="Mollusca" rank="species" species="thyrideus">
<emphasis box="[699,922,501,527]" italics="true" pageId="8" pageNumber="341">Cyclopecten thyrideus</emphasis>
(
<bibRefCitation author="MELVILL J. C. &amp; STANDEN R." box="[938,1092,501,528]" pageId="8" pageNumber="341" pagination="783 - 848" refId="ref21802" refString="MELVILL J. C. &amp; STANDEN R. 1907. - The Mollusca of the Persian Gulf, Gulf of Oman and Arabian Sea as evidenced mainly through the collections of Mr F. W. Townsend, 1893 - 1906, with descriptions of new species. Part 2. Pelecypoda. Proceedings of the Zoological Society of London 1906: 783 - 848." type="book chapter" year="1907">Melvill, 1907</bibRefCitation>
)
</taxonomicName>
, from the northwestern Indian Ocean is also close to
<taxonomicName authorityName="Dijkstra &amp; Maestrati" authorityYear="2010" class="Bivalvia" family="Propeamussiidae" genus="Cyclopecten" kingdom="Animalia" order="Pectinoida" pageId="8" pageNumber="341" phylum="Mollusca" rank="species" species="ambiguus">
<emphasis italics="true" pageId="8" pageNumber="341">C. ambiguus</emphasis>
</taxonomicName>
(somewhat similar in size, shape, sculpture and internal rudimenrary riblets), but differs in having a fine microscopic radial sculpture in early growth stage immediately below the dissoconch stage (a commarginal sculpture in
<taxonomicName authorityName="Dijkstra &amp; Maestrati" authorityYear="2010" box="[1059,1193,691,717]" class="Bivalvia" family="Propeamussiidae" genus="Cyclopecten" kingdom="Animalia" order="Pectinoida" pageId="8" pageNumber="341" phylum="Mollusca" rank="species" species="ambiguus">
<emphasis box="[1059,1193,691,717]" italics="true" pageId="8" pageNumber="341">C. ambiguus</emphasis>
</taxonomicName>
), weaker commarginal lirae on the left valve and fewer commarginal lirae on the anterior auricle of the right valve).
</paragraph>
<paragraph blockId="8.[674,1212,216,1383]" pageId="8" pageNumber="341">
<taxonomicName authority="Hayami &amp; Kase, 1993" authorityName="Hayami &amp; Kase" authorityYear="1993" box="[699,1205,818,845]" class="Bivalvia" family="Propeamussiidae" genus="Cyclopecten" kingdom="Animalia" order="Pectinoida" pageId="8" pageNumber="341" phylum="Mollusca" rank="species" species="ryukyuensis">
<emphasis box="[699,944,818,844]" italics="true" pageId="8" pageNumber="341">Cyclopecten ryukyuensis</emphasis>
<bibRefCitation author="HAYAMI I. &amp; KASE T." box="[953,1205,818,845]" pageId="8" pageNumber="341" pagination="1 - 133" refId="ref21427" refString="HAYAMI I. &amp; KASE T. 1993. - Submarine cave Bivalvia from the Ryukyu Islands: systematics and evolutionary significance. The University Museum, The University of Tokyo, Bulletin 35: i-vi, 1 - 133." type="book chapter" year="1993">Hayami &amp; Kase, 1993</bibRefCitation>
</taxonomicName>
, from southern
<collectingCountry box="[838,898,849,876]" name="Japan" pageId="8" pageNumber="341">Japan</collectingCountry>
and the
<collectingCountry box="[989,1110,849,876]" name="Philippines" pageId="8" pageNumber="341">Philippines</collectingCountry>
is similar in size, shape and sculpture, but differs in having widely spaced commarginal lirae and irregular antimarginal intercalated scratches (see
<bibRefCitation author="HAYAMI I. &amp; KASE T." pageId="8" pageNumber="341" pagination="1 - 133" refId="ref21427" refString="HAYAMI I. &amp; KASE T. 1993. - Submarine cave Bivalvia from the Ryukyu Islands: systematics and evolutionary significance. The University Museum, The University of Tokyo, Bulletin 35: i-vi, 1 - 133." type="book chapter" year="1993">Hayami &amp; Kase 1993</bibRefCitation>
: figs 195, 197) in early growth stage on the left valve (only closely spaced commarginal lirae in
<taxonomicName authorityName="Dijkstra &amp; Maestrati" authorityYear="2010" box="[675,805,1039,1066]" class="Bivalvia" family="Propeamussiidae" genus="Cyclopecten" kingdom="Animalia" order="Pectinoida" pageId="8" pageNumber="341" phylum="Mollusca" rank="species" species="ambiguus">
<emphasis box="[675,805,1039,1066]" italics="true" pageId="8" pageNumber="341">C. ambiguus</emphasis>
</taxonomicName>
), fewer intermediate secondary radial lirae, and in lacking internal rudimentary riblets.
</paragraph>
<paragraph blockId="8.[674,1212,216,1383]" pageId="8" pageNumber="341">
Finally,
<taxonomicName authority="(Finlay, 1926)" baseAuthorityName="Finlay" baseAuthorityYear="1926" box="[781,1148,1103,1130]" class="Bivalvia" family="Propeamussiidae" genus="Cyclopecten" kingdom="Animalia" order="Pectinoida" pageId="8" pageNumber="341" phylum="Mollusca" rank="species" species="secundus">
<emphasis box="[781,992,1103,1129]" italics="true" pageId="8" pageNumber="341">Cyclopecten secundus</emphasis>
(Finlay, 1926)
</taxonomicName>
, from
<collectingCountry box="[675,817,1135,1162]" name="New Zealand" pageId="8" pageNumber="341">New Zealand</collectingCountry>
, also has a somewhat similar sculpture in early growth stage as
<taxonomicName authorityName="Hayami &amp; Kase" authorityYear="1993" box="[913,1054,1166,1193]" class="Bivalvia" family="Propeamussiidae" genus="Cyclopecten" kingdom="Animalia" order="Pectinoida" pageId="8" pageNumber="341" phylum="Mollusca" rank="species" species="ryukyuensis">
<emphasis box="[913,1054,1166,1193]" italics="true" pageId="8" pageNumber="341">C. ryukyuensis</emphasis>
</taxonomicName>
, although with more closely spaced (but much wider and stronger than in
<taxonomicName authorityName="Dijkstra &amp; Maestrati" authorityYear="2010" box="[765,898,1229,1256]" class="Bivalvia" family="Propeamussiidae" genus="Cyclopecten" kingdom="Animalia" order="Pectinoida" pageId="8" pageNumber="341" phylum="Mollusca" rank="species" species="ambiguus">
<emphasis box="[765,898,1229,1256]" italics="true" pageId="8" pageNumber="341">C. ambiguus</emphasis>
</taxonomicName>
), more prominent commarginal lirae with strong lamellae on the intersections (almost lacking in
<taxonomicName authorityName="Dijkstra &amp; Maestrati" authorityYear="2010" box="[878,1010,1293,1319]" class="Bivalvia" family="Propeamussiidae" genus="Cyclopecten" kingdom="Animalia" order="Pectinoida" pageId="8" pageNumber="341" phylum="Mollusca" rank="species" species="ambiguus">
<emphasis box="[878,1010,1293,1319]" italics="true" pageId="8" pageNumber="341">C. ambiguus</emphasis>
</taxonomicName>
) and sometimes 1 or 2 internal rudimentary riblets near the periphery (usually and more numerous in
<taxonomicName authorityName="Dijkstra &amp; Maestrati" authorityYear="2010" box="[1062,1193,1356,1383]" class="Bivalvia" family="Propeamussiidae" genus="Cyclopecten" kingdom="Animalia" order="Pectinoida" pageId="8" pageNumber="341" phylum="Mollusca" rank="species" species="ambiguus">
<emphasis box="[1062,1193,1356,1383]" italics="true" pageId="8" pageNumber="341">C. ambiguus</emphasis>
</taxonomicName>
).
</paragraph>
</subSubSection>
</treatment>
</document>