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<document id="38DCEDC2B7C4ACE68641C5A13ADD3636" ID-CLB-Dataset="31761" ID-DOI="10.11646/zootaxa.4338.1.3" ID-GBIF-Dataset="26f58d19-4735-470a-a8c7-f9b5cea8a1d6" ID-ISSN="1175-5326" ID-Zenodo-Dep="1035558" ID-ZooBank="398F004C-B562-415B-916D-DBA32EF0F88E" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1508827121455" checkinUser="plazi" docAuthor="Pérez, Damián E. &amp; Del Río, Claudia J." docDate="2017" docId="03F4878BB814B478FF687165FEC8FEFB" docLanguage="en" docName="zootaxa.4338.1.3.pdf" docOrigin="Zootaxa 4338 (1)" docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article" docStyleId="647186512141C8FC8976D5BCC54AEB7D" docStyleName="Zootaxa.2013-.journal_article" docStyleVersion="9" docTitle="Pleuromeris fueguina Pérez &amp; Del Río 2017" docType="treatment" docVersion="9" lastPageNumber="71" masterDocId="FFCDFFF3B807B46CFFFF7221FF70FF9E" masterDocTitle="Systematics of the family Carditidae (Bivalvia: Archiheterodonta) in the Cenozoic of Argentina" masterLastPageNumber="84" masterPageNumber="51" pageNumber="70" updateTime="1698470132125" updateUser="ExternalLinkService">
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<mods:title id="255E8B0E2CF4FA8AFEA7435610BE5494">Systematics of the family Carditidae (Bivalvia: Archiheterodonta) in the Cenozoic of Argentina</mods:title>
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<mods:namePart id="11C2FE495C3A0DC253BC0CC9B5AA79AE">Pérez, Damián E.</mods:namePart>
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<mods:namePart id="6EA59543D38672E1E98CF8C38CF3F5D8">Del Río, Claudia J.</mods:namePart>
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<treatment id="03F4878BB814B478FF687165FEC8FEFB" ID-DOI="http://doi.org/10.5281/zenodo.6030281" ID-GBIF-Taxon="135465215" ID-Zenodo-Dep="6030281" LSID="urn:lsid:plazi:treatment:03F4878BB814B478FF687165FEC8FEFB" httpUri="http://treatment.plazi.org/id/03F4878BB814B478FF687165FEC8FEFB" lastPageId="20" lastPageNumber="71" pageId="19" pageNumber="70">
<subSubSection id="C3476516B814B47FFF687165FE56FCE1" pageId="19" pageNumber="70" type="nomenclature">
<paragraph id="8BE2369DB814B47FFF687165FC53FCC0" blockId="19.[151,803,836,895]" box="[151,803,836,862]" pageId="19" pageNumber="70">
<heading id="D0AA81F1B814B47FFF687165FC53FCC0" bold="true" box="[151,803,836,862]" fontSize="11" level="1" pageId="19" pageNumber="70" reason="1">
<taxonomicName id="4C5D4D1EB814B47FFF687165FC53FCC0" authority="(Steinmann &amp; Wilckens, 1908)" authorityName="Pérez &amp; Del Río" authorityYear="2017" baseAuthorityName="Steinmann &amp; Wilckens" baseAuthorityYear="1908" box="[151,803,836,862]" class="Bivalvia" family="Carditidae" genus="Pleuromeris" kingdom="Animalia" order="Carditoida" pageId="19" pageNumber="70" phylum="Mollusca" rank="species" species="fueguina">
<emphasis id="B929EA8FB814B47FFF687165FC53FCC0" bold="true" box="[151,803,836,862]" pageId="19" pageNumber="70">
<emphasis id="B929EA8FB814B47FFF687165FEEFFCC0" bold="true" box="[151,415,836,862]" italics="true" pageId="19" pageNumber="70">Pleuromeris fueguina</emphasis>
(
<bibRefCitation id="EFCC4B6CB814B47FFE517165FC6BFCC0" author="Steinmann" box="[430,795,836,862]" pageId="19" pageNumber="70" refString="Steinmann, G. &amp; Wilckens, O. (1908) Kreide und Tertiarfossilien aus den Magellanslandern, gesammelt von der Schwedischen Expedition 1895 - 1897. Arkiv fur Zoologi, 4, 1 - 119." type="journal article" year="1908">Steinmann &amp; Wilckens, 1908</bibRefCitation>
)
</emphasis>
</taxonomicName>
</heading>
</paragraph>
<paragraph id="8BE2369DB814B47FFF687147FE56FCE1" blockId="19.[151,803,836,895]" box="[151,294,870,895]" pageId="19" pageNumber="70">Figure 5.7–9</paragraph>
</subSubSection>
<subSubSection id="C3476516B814B47FFF68718FFC99FC7D" pageId="19" pageNumber="70" type="description">
<paragraph id="8BE2369DB814B47FFF68718FFC99FC7D" blockId="19.[151,1259,942,995]" pageId="19" pageNumber="70">
v*1908
<taxonomicName id="4C5D4D1EB814B47FFF16718FFC4BFC5A" authority="Steinmann &amp; Wilckens" authorityName="Steinmann &amp; Wilckens" box="[233,827,942,964]" class="Bivalvia" family="Carditidae" genus="Cardita" kingdom="Animalia" order="Carditoida" pageId="19" pageNumber="70" phylum="Mollusca" rank="variety" species="elegantoides" variety="fueguina">
<emphasis id="B929EA8FB814B47FFF16718FFECDFC5A" box="[233,445,942,964]" italics="true" pageId="19" pageNumber="70">Cardita elegantoides</emphasis>
var.
<emphasis id="B929EA8FB814B47FFE10718FFD38FC5A" box="[495,584,942,964]" italics="true" pageId="19" pageNumber="70">fueguina</emphasis>
Steinmann &amp; Wilckens
</taxonomicName>
, p. 39–41, pl. 3, figs 5a–c, pl. 4, figs 2a–b. 1978
<taxonomicName id="4C5D4D1EB814B47FFF2F71ECFD32FC7D" authority="(Ortmann)" authorityName="Ortmann" baseAuthorityName="Ortmann" baseAuthorityYear="1902" box="[208,578,973,995]" class="Bivalvia" family="Carditidae" genus="Pleuromeris" kingdom="Animalia" order="Carditoida" pageId="19" pageNumber="70" phylum="Mollusca" rank="species" species="elegantoides">
<emphasis id="B929EA8FB814B47FFF2F71ECFEA2FC7D" box="[208,466,973,995]" italics="true" pageId="19" pageNumber="70">Pleuromeris elegantoides</emphasis>
(Ortmann)
</taxonomicName>
—Malumián
<emphasis id="B929EA8FB814B47FFD3471EFFD8EFC7D" box="[715,766,973,995]" italics="true" pageId="19" pageNumber="70">et al.</emphasis>
, p. 275, pl. 4, figs 6–8.
</paragraph>
</subSubSection>
<subSubSection id="C3476516B814B47FFF68762EFC73FB0B" pageId="19" pageNumber="70" type="materials_examined">
<paragraph id="8BE2369DB814B47FFF68762EFD0BFBD3" blockId="19.[151,1437,1039,2037]" pageId="19" pageNumber="70">
<materialsCitation id="3B353CC0B814B47FFF68762EFD0BFBD3" ID-GBIF-Occurrence="1675508647" location="Carmen Silva Formation" municipality="Sierra Carmen Silva" pageId="19" pageNumber="70" specimenCount="2" stateProvince="Tierra del Fuego Province" typeStatus="holotype">
<emphasis id="B929EA8FB814B47FFF68762EFE2CFBB6" bold="true" box="[151,348,1039,1064]" pageId="19" pageNumber="70">
<typeStatus id="54E6883FB814B47FFF68762EFFA2FBB6" box="[151,210,1039,1064]" pageId="19" pageNumber="70">Type</typeStatus>
specimens.
</emphasis>
<typeStatus id="54E6883FB814B47FFE99762EFEBEFBB6" box="[358,462,1039,1064]" pageId="19" pageNumber="70" type="holotype">Holotype</typeStatus>
PZ-NHRM Mo. 117903, right and left valves from
<collectingMunicipality id="6B86ACE7B814B47FFBD0762EFA69FBB6" box="[1071,1305,1039,1064]" pageId="19" pageNumber="70">Sierra Carmen Silva</collectingMunicipality>
(
<collectingRegion id="4999F87FB814B47FFAD5762EFE3BFBD3" country="Argentina" name="Tierra del Fuego - Antartida e Islas del Atlantico Sur" pageId="19" pageNumber="70">
Tierra del
<collectingRegion id="4999F87FB814B47FFF687614FE3BFBD3" box="[151,331,1076,1101]" inferredBySuffix="true" pageId="19" pageNumber="70">Fuego Province</collectingRegion>
</collectingRegion>
,
<location id="8E826046B814B47FFEAA7615FD00FBD3" LSID="urn:lsid:plazi:treatment:03F4878BB814B478FF687165FEC8FEFB:8E826046B814B47FFEAA7615FD00FBD3" box="[341,624,1076,1101]" municipality="Sierra Carmen Silva" name="Carmen Silva Formation" pageId="19" pageNumber="70" stateProvince="Tierra del Fuego Province">Carmen Silva Formation</location>
).
</materialsCitation>
</paragraph>
<paragraph id="8BE2369DB814B47FFF387676FC73FB0B" blockId="19.[151,1437,1039,2037]" pageId="19" pageNumber="70">
<emphasis id="B929EA8FB814B47FFF387676FEF3FBEE" bold="true" box="[199,387,1111,1136]" pageId="19" pageNumber="70">Other material.</emphasis>
MACN-Pi 2619, 3747, 3748, CIRGEO-PI 2382, 2877, CPBA 9349 (35 left valves, 30 right valves, three articulated shells and one internal mould).
</paragraph>
</subSubSection>
<subSubSection id="C3476516B814B47FFF3876BEFDD5FB42" pageId="19" pageNumber="70" type="diagnosis">
<paragraph id="8BE2369DB814B47FFF3876BEFDD5FB42" blockId="19.[151,1437,1039,2037]" pageId="19" pageNumber="70">
<emphasis id="B929EA8FB814B47FFF3876BEFE31FB26" bold="true" box="[199,321,1183,1208]" pageId="19" pageNumber="70">Diagnosis.</emphasis>
Shell slightly convex with slightly recurved umbo. Lunule flat. Left anterior tooth narrow and inclined posteriorly. Low radial ribs (18 to 21).
</paragraph>
</subSubSection>
<subSubSection id="C3476516B814B47FFF3876C6FA21F94A" pageId="19" pageNumber="70" type="description">
<paragraph id="8BE2369DB814B47FFF3876C6FE91FAF3" blockId="19.[151,1437,1039,2037]" pageId="19" pageNumber="70">
<emphasis id="B929EA8FB814B47FFF3876C6FE29FA9E" bold="true" box="[199,345,1255,1280]" pageId="19" pageNumber="70">Description.</emphasis>
Shell small-sized (less than
<quantity id="4CA59B78B814B47FFD6276C9FD9DFB61" box="[669,749,1256,1280]" metricMagnitude="-2" metricUnit="m" metricValue="3.0" pageId="19" pageNumber="70" unit="mm" value="30.0">30 mm</quantity>
in length), slightly convex, subtriangular; dorsal and ventral margins straight and posterior and anterior ones slightly rounded. Umbo large, rounded, slightly recurved, placed between first and second anterior third of valve length. Lunule large, flat, vertical, bounded from remaining surface of shell by an incised groove.
</paragraph>
<paragraph id="8BE2369DB814B47FFF387756FAE0F9DB" blockId="19.[151,1437,1039,2037]" pageId="19" pageNumber="70">Right valve hinge with slightly concave ventral edge below middle tooth; anterior tooth small, thin, short, straight, with concave anterior and convex posterior sides, in contact with the lunular margin; middle tooth triangular, inclined posteriorly, with very broad base, with slightly concave anterior and gently convex posterior sides, and higher towards apex on lateral view; posterior tooth thin and slightly curved. Left valve hinge with slightly concave ventral edge; elongate anterior tooth, triangular, slightly inclined posteriorly, with straight anterior and posterior sides and higher towards apex on lateral view; posterior tooth elongate, narrow, and slightly curved.</paragraph>
<paragraph id="8BE2369DB814B47FFF38746EFA21F94A" blockId="19.[151,1437,1039,2037]" pageId="19" pageNumber="70">External sculpture of 18 to 21 entire radial ribs, low, narrow with triangular transverse section, widening towards ventral margin; covered with closely-spaced nodes with subrectangular to subquadrate transverse section; wide ‘V’-shaped intercostal spaces of. Pallial line one-fifth of total valve height. Inner ventral margin strongly crenulated, crenulations subrectangular, truncated, covering entire margin to posterior adductor muscle scar.</paragraph>
</subSubSection>
<subSubSection id="C3476516B814B478FF3874FEFEC8FEFB" lastPageId="20" lastPageNumber="71" pageId="19" pageNumber="70" type="discussion">
<paragraph id="8BE2369DB814B47FFF3874FEFEA5F832" blockId="19.[151,1437,1039,2037]" pageId="19" pageNumber="70">
<emphasis id="B929EA8FB814B47FFF3874FEFE4BF966" bold="true" box="[199,315,1759,1784]" pageId="19" pageNumber="70">Remarks.</emphasis>
The original
<taxonomicName id="4C5D4D1EB814B47FFE2174FEFCF8F966" authority="Ortmann, 1899" authorityName="Ortmann-Ortmann" authorityYear="1899" box="[478,904,1759,1784]" class="Bivalvia" family="Carditidae" genus="Cardita" kingdom="Animalia" order="Carditoida" pageId="19" pageNumber="70" phylum="Mollusca" rank="species" species="elegantoides">
<emphasis id="B929EA8FB814B47FFE2174FEFDBCF966" box="[478,716,1759,1784]" italics="true" pageId="19" pageNumber="70">Cardita elegantoides</emphasis>
<bibRefCitation id="EFCC4B6CB814B47FFD2874C1FCF8F966" author="Ortmann" box="[727,904,1760,1784]" pageId="19" pageNumber="70" refString="Ortmann, A. E. (1899) The fauna of the Magellanian beds of Punta Arenas, Chili. The American Journal of Science, 8, 427 - 432. https: // doi. org / 10.2475 / ajs. s 4 - 8.48.427" type="journal article" year="1899">Ortmann, 1899</bibRefCitation>
</taxonomicName>
, from the Eocene of the Loreto Formation in
<collectingCountry id="F34A760DB814B47FFF687525FFA7F883" box="[151,215,1796,1821]" name="Chile" pageId="19" pageNumber="70">Chile</collectingCountry>
, is here described under
<taxonomicName id="4C5D4D1EB814B47FFE147525FDE1F883" authorityName="Maxwell" authorityYear="1969" box="[491,657,1796,1821]" class="Bivalvia" family="Carditidae" genus="Purpurocardia" kingdom="Animalia" order="Carditoida" pageId="19" pageNumber="70" phylum="Mollusca" rank="genus">
<emphasis id="B929EA8FB814B47FFE147525FDE1F883" box="[491,657,1796,1821]" italics="true" pageId="19" pageNumber="70">Purpurocardia</emphasis>
</taxonomicName>
.
<bibRefCitation id="EFCC4B6CB814B47FFD607525FC84F882" author="Steinmann" box="[671,1012,1796,1821]" pageId="19" pageNumber="70" refString="Steinmann, G. &amp; Wilckens, O. (1908) Kreide und Tertiarfossilien aus den Magellanslandern, gesammelt von der Schwedischen Expedition 1895 - 1897. Arkiv fur Zoologi, 4, 1 - 119." type="journal article" year="1908">Steinmann &amp; Wilckens (1908)</bibRefCitation>
introduced
<taxonomicName id="4C5D4D1EB814B47FFB857524FB87F882" authorityName="Pérez &amp; Del Río" authorityYear="2017" baseAuthorityName="Steinmann &amp; Wilckens" baseAuthorityYear="1908" box="[1146,1271,1796,1820]" class="Bivalvia" family="Carditidae" genus="Pleuromeris" kingdom="Animalia" order="Carditoida" pageId="19" pageNumber="70" phylum="Mollusca" rank="species" species="fueguina">
<emphasis id="B929EA8FB814B47FFB857524FB87F882" box="[1146,1271,1796,1820]" italics="true" pageId="19" pageNumber="70">P. fueguina</emphasis>
</taxonomicName>
as a variety of this species, pointing out that illustrations provided by
<bibRefCitation id="EFCC4B6CB814B47FFCF37509FB1EF8DE" author="Ortmann" box="[780,1134,1831,1856]" pageId="19" pageNumber="70" refString="Ortmann, A. E. (1902) Tertiary Invertebrates. In: Scott, W. B. (Ed.), Reports of the Princeton University Expedition to Patagonia 1896 - 1899. Vol. 4. Paleontology I, Part 2. J. Pierpoint Morgan Publishing Foundation, Princeton, New Jersey, pp. 32 - 45." type="book chapter" year="1902" yearSuffix="a">Ortmann (1902, pl. 26, fig. 5a)</bibRefCitation>
show differences between the specimens from
<collectingRegion id="4999F87FB814B47FFE7E756DFE8FF8FA" box="[385,511,1868,1892]" country="Argentina" name="Santa Cruz" pageId="19" pageNumber="70">Santa Cruz</collectingRegion>
and
<collectingRegion id="4999F87FB814B47FFDC3756DFD8FF8FB" box="[572,767,1868,1893]" country="Argentina" name="Tierra del Fuego - Antartida e Islas del Atlantico Sur" pageId="19" pageNumber="70">Tierra del Fuego</collectingRegion>
. Ortmann illustrated the
<typeStatus id="54E6883FB814B47FFBE1756DFBF0F8FB" box="[1054,1152,1868,1893]" pageId="19" pageNumber="70" type="holotype">holotype</typeStatus>
of
<taxonomicName id="4C5D4D1EB814B47FFB54756CFA2CF8FB" authorityName="Ortmann-Ortmann" authorityYear="1899" box="[1195,1372,1868,1893]" class="Bivalvia" family="Carditidae" genus="Cardita" kingdom="Animalia" order="Carditoida" pageId="19" pageNumber="70" phylum="Mollusca" rank="species" species="elegantoides">
<emphasis id="B929EA8FB814B47FFB54756CFA2CF8FB" box="[1195,1372,1868,1893]" italics="true" pageId="19" pageNumber="70">C. elegantoides</emphasis>
</taxonomicName>
from Punta Arenas, and of other shells collected in the
<collectingRegion id="4999F87FB814B47FFD3E7551FC4DF816" box="[705,829,1904,1928]" country="Argentina" name="Santa Cruz" pageId="19" pageNumber="70">Santa Cruz</collectingRegion>
River area on plate 26, figures 5b–c (herein described as
<taxonomicName id="4C5D4D1EB814B47FFF4A75B5FEF2F833" authority="Pérez &amp; Del Río, 2017" authorityName="Pérez &amp; Del Río" authorityYear="2017" box="[181,386,1940,1965]" class="Bivalvia" family="Carditidae" genus="Cyclocardia" kingdom="Animalia" order="Carditoida" pageId="19" pageNumber="70" phylum="Mollusca" rank="species" species="dalek" status="sp. nov.">
<emphasis id="B929EA8FB814B47FFF4A75B5FEF2F833" box="[181,386,1940,1965]" italics="true" pageId="19" pageNumber="70">Cyclocardia dalek</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A21A57F4B814B47FFE7675B4FEB7F832" box="[393,455,1940,1964]" pageId="19" pageNumber="70" rank="species">n. sp.</taxonomicNameLabel>
).
</paragraph>
<paragraph id="8BE2369DB814B47FFF387599FA4AF86B" blockId="19.[151,1437,1039,2037]" pageId="19" pageNumber="70">
<taxonomicName id="4C5D4D1EB814B47FFF387599FECBF84E" authorityName="Pérez &amp; Del Río" authorityYear="2017" baseAuthorityName="Steinmann &amp; Wilckens" baseAuthorityYear="1908" box="[199,443,1976,2001]" class="Bivalvia" family="Carditidae" genus="Pleuromeris" kingdom="Animalia" order="Carditoida" pageId="19" pageNumber="70" phylum="Mollusca" rank="species" species="fueguina">
<emphasis id="B929EA8FB814B47FFF387599FECBF84E" box="[199,443,1976,2001]" italics="true" pageId="19" pageNumber="70">Pleuromeris fueguina</emphasis>
</taxonomicName>
is placed in this genus because of its small-sized shell with subtriangular outline, large and wide lunule, broad right middle tooth and the development of 18 to 21 radial ribs covered with nodes.
</paragraph>
<paragraph id="8BE2369DB813B478FF3872B6FD8DFF4B" blockId="20.[151,1436,151,357]" pageId="20" pageNumber="71">
The species can be distinguished from
<taxonomicName id="4C5D4D1EB813B478FD8072B8FC43FF2E" authorityName="Conrad" authorityYear="1867" box="[639,819,151,176]" class="Bivalvia" family="Carditidae" genus="Pleuromeris" kingdom="Animalia" order="Carditoida" pageId="20" pageNumber="71" phylum="Mollusca" rank="species" species="decemcostata">
<emphasis id="B929EA8FB813B478FD8072B8FC43FF2E" box="[639,819,151,176]" italics="true" pageId="20" pageNumber="71">P. decemcostata</emphasis>
</taxonomicName>
by the development of a flat lunule, left anterior tooth inclined posteriorly and a higher number of radial ribs.
</paragraph>
<paragraph id="8BE2369DB813B478FF3872C1FD96FE83" blockId="20.[151,1436,151,357]" pageId="20" pageNumber="71">
It is separated from
<taxonomicName id="4C5D4D1EB813B478FE5772C0FD43FF66" baseAuthorityName="Say" baseAuthorityYear="1826" box="[424,563,223,248]" class="Bivalvia" family="Carditidae" genus="Pleuromeris" kingdom="Animalia" order="Carditoida" pageId="20" pageNumber="71" phylum="Mollusca" rank="species" species="tridentata">
<emphasis id="B929EA8FB813B478FE5772C0FD43FF66" box="[424,563,223,248]" italics="true" pageId="20" pageNumber="71">P. tridentata</emphasis>
</taxonomicName>
by having a larger and less recurved umbo, narrower and inclined posteriorly left anterior tooth and a higher number of radial ribs.
</paragraph>
<paragraph id="8BE2369DB813B478FF387306FEC8FEFB" blockId="20.[151,1436,151,357]" pageId="20" pageNumber="71">
<taxonomicName id="4C5D4D1EB813B478FF387306FEC9FEDE" authorityName="Pérez &amp; Del Río" authorityYear="2017" baseAuthorityName="Steinmann &amp; Wilckens" baseAuthorityYear="1908" box="[199,441,295,320]" class="Bivalvia" family="Carditidae" genus="Pleuromeris" kingdom="Animalia" order="Carditoida" pageId="20" pageNumber="71" phylum="Mollusca" rank="species" species="fueguina">
<emphasis id="B929EA8FB813B478FF387306FEC9FEDE" box="[199,441,295,320]" italics="true" pageId="20" pageNumber="71">Pleuromeris fueguina</emphasis>
</taxonomicName>
differs from
<taxonomicName id="4C5D4D1EB813B478FDB37308FDA4FEDE" baseAuthorityName="Deshayes" baseAuthorityYear="1854" box="[588,724,295,320]" class="Bivalvia" family="Carditidae" genus="Pleuromeris" kingdom="Animalia" order="Carditoida" pageId="20" pageNumber="71" phylum="Mollusca" rank="species" species="zelandica">
<emphasis id="B929EA8FB813B478FDB37308FDA4FEDE" box="[588,724,295,320]" italics="true" pageId="20" pageNumber="71">P. zelandica</emphasis>
</taxonomicName>
by its more convex shell, more recurved umbo and left anterior tooth inclined posteriorly.
</paragraph>
</subSubSection>
</treatment>
</document>
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