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<document id="4F4443953F0FED2B95E7F46F89FBE54F" ID="10.11646/zootaxa.4154.1.1" ID-DOI="10.11646/zootaxa.4154.1.1" ID-GBIF-Dataset="2b00120c-7a1a-4682-953c-c986155da6b6" ID-ISSN="1175-5326" ID-Zenodo-Dep="272151" ID-ZooBank="1FAB3228-9274-42D8-A2AF-AE19999E17E8" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1471501098894" checkinUser="plazi" docAuthor="Saether, Kristian P., Jingeng, Sha, Little, Crispin T. S. &amp; Campbell, Kathleen A." docDate="2016" docId="086C87BA001A1767FF45F8D7FD51FDF2" docLanguage="en" docName="zootaxa.4154.1.1.pdf" docOrigin="Zootaxa 4154 (1)" docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article" docStyleId="647186512141C8FC8976D5BCC54AEB7D" docStyleName="Zootaxa.2013-.journal_article" docStyleVersion="9" docTitle="Parvamussium maorium Dell 1956" docType="treatment" docVersion="10" lastPageNumber="11" masterDocId="F455FFC20013176DFFD2FFDFFFECFF90" masterDocTitle="New records and a new species of bivalve (Mollusca: Bivalvia) from Miocene hydrocarbon seep deposits, North Island, New Zealand" masterLastPageNumber="26" masterPageNumber="1" pageNumber="10" updateTime="1698381922709" updateUser="plazi">
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<mods:title id="3F5DED87827A169C803E4F7CD3D7113F">New records and a new species of bivalve (Mollusca: Bivalvia) from Miocene hydrocarbon seep deposits, North Island, New Zealand</mods:title>
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<mods:namePart id="DEE759CC80CC297FF073C5B11C7C587E">Saether, Kristian P.</mods:namePart>
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<mods:namePart id="1194739587E176CB58A82B0C05152BA2">Jingeng, Sha</mods:namePart>
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<mods:namePart id="1C98E54E9A8F9F0D8F06434BF747853B">Little, Crispin T. S.</mods:namePart>
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<mods:namePart id="97E9EA52A56A88665899BCC79C99FDF0">Campbell, Kathleen A.</mods:namePart>
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<mods:date id="D651D8FF6A43FB639AE5B1F766119C28">2016</mods:date>
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<mods:number id="075E2180DE87F5E457FE39B31DBACD8E">4154</mods:number>
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<treatment id="086C87BA001A1767FF45F8D7FD51FDF2" ID-DOI="http://doi.org/10.5281/zenodo.5676852" ID-GBIF-Taxon="124379707" ID-Zenodo-Dep="5676852" LSID="urn:lsid:plazi:treatment:086C87BA001A1767FF45F8D7FD51FDF2" httpUri="http://treatment.plazi.org/id/086C87BA001A1767FF45F8D7FD51FDF2" lastPageId="10" lastPageNumber="11" pageId="9" pageNumber="10">
<subSubSection id="C8DF6527001A1764FF45F8D7FEEFF8D3" pageId="9" pageNumber="10" type="nomenclature">
<paragraph id="807A36AC001A1764FF45F8D7FD86F8B2" blockId="9.[151,618,1800,1864]" box="[151,618,1800,1826]" pageId="9" pageNumber="10">
<heading id="DB3281C0001A1764FF45F8D7FD86F8B2" bold="true" box="[151,618,1800,1826]" fontSize="11" level="1" pageId="9" pageNumber="10" reason="1">
<taxonomicName id="47C54D2F001A1764FF45F8D7FD86F8B2" authority="Dell, 1956" authorityName="Dell" authorityYear="1956" box="[151,618,1800,1826]" class="Bivalvia" family="Propeamussiidae" genus="Parvamussium" kingdom="Animalia" order="Pectinoida" pageId="9" pageNumber="10" phylum="Mollusca" rank="species" species="maorium">
<emphasis id="B2B1EABE001A1764FF45F8D7FD86F8B2" bold="true" box="[151,618,1800,1826]" pageId="9" pageNumber="10">
<emphasis id="B2B1EABE001A1764FF45F8D7FEA0F8B2" bold="true" box="[151,332,1800,1826]" italics="true" pageId="9" pageNumber="10">Parvamussium</emphasis>
cf.
<emphasis id="B2B1EABE001A1764FEAAF8D7FE0BF8B2" bold="true" box="[376,487,1800,1826]" italics="true" pageId="9" pageNumber="10">maorium</emphasis>
<bibRefCitation id="E4544B5D001A1764FE3CF8D7FD86F8B2" author="Dell" box="[494,618,1800,1826]" pageId="9" pageNumber="10" refString="Dell, R. K. (1956) The archibenthal Mollusca of New Zealand. Bulletin of the Dominion Museum, Wellington, 18, 1 - 235." type="journal article" year="1956">Dell, 1956</bibRefCitation>
</emphasis>
</taxonomicName>
</heading>
</paragraph>
<paragraph id="807A36AC001A1764FF45F8F4FEEFF8D3" blockId="9.[151,618,1800,1864]" box="[151,259,1835,1864]" pageId="9" pageNumber="10">
(
<figureCitation id="18FE2A29001A1764FF4DF8F4FF0DF8D4" box="[159,225,1835,1860]" captionStart="FIGURE 5" captionStartId="9.[151,250,1452,1474]" captionTargetBox="[155,1436,837,1424]" captionTargetId="figure@9.[155,1440,837,1425]" captionTargetPageId="9" captionText="FIGURE 5 Non-seep-typical bivalves found at Miocene New Zealand hydrocarbon seeps. A B. cf. Pulvinites sp. from Moonlight North. Scale bar is 10 mm. A. Specimen L 4650. A 1. External view of shell. A 2. Internal view of shell. B. Specimen L 4651. B 1. Internal view of shell. B 2. Lateral view, showing thin laminae. C. Image of modern Pulvinites exempla (Hedley, 1914) for comparison. Specimen M. 281853, NMNZ (photography by K. P. S.). C 1. External view of shell. C 2. Lateral view, showing thin laminae. C 3. Internal view of shell. D. Acesta cf. saginata Marshall, 2001. Specimen L 4652 from Rocky Knob. Scale bar is 10 mm. D 1. Lateral view of right valve. D 2. Anterior view. D 3. Dorsal view. E. Parvamussium cf. maorium Dell, 1956. Scale bar is 2 mm. E 1. Specimen TM 9421 from Moonlight North, anteroventral portion absent. Lateral view of right valve. E 2. Image of modern Parvamussium maorium Dell, 1956 for comparison. Specimen M. 138360, NMNZ (photography by K. P. S.)." httpUri="https://zenodo.org/record/272156/files/figure.png" pageId="9" pageNumber="10">Fig. 5</figureCitation>
E1)
</paragraph>
</subSubSection>
<subSubSection id="C8DF6527001A1764FF45F8AAFAB4F81E" box="[151,1368,1909,1934]" pageId="9" pageNumber="10" type="materials_examined">
<paragraph id="807A36AC001A1764FF45F8AAFAB4F81E" blockId="9.[151,1436,1909,2007]" box="[151,1368,1909,1934]" pageId="9" pageNumber="10">
<emphasis id="B2B1EABE001A1764FF45F8AAFEEAF81E" bold="true" box="[151,262,1909,1934]" pageId="9" pageNumber="10">Material.</emphasis>
One specimen from Moonlight North (Y16/f0694),?adult, TM9241, UOA (borrowed from GNS).
</paragraph>
</subSubSection>
<subSubSection id="C8DF6527001A1767FF15F846FB8BFEAF" lastPageId="10" lastPageNumber="11" pageId="9" pageNumber="10" type="description">
<paragraph id="807A36AC001A1767FF15F846FB8BFEAF" blockId="9.[151,1436,1909,2007]" lastBlockId="10.[151,1436,151,611]" lastPageId="10" lastPageNumber="11" pageId="9" pageNumber="10">
<emphasis id="B2B1EABE001A1764FF15F846FEB5F822" bold="true" box="[199,345,1945,1970]" pageId="9" pageNumber="10">Description.</emphasis>
Incomplete internal mould; auricles absent; anterior half
<emphasis id="B2B1EABE001A1764FC38F844FBE7F822" box="[1002,1035,1947,1970]" italics="true" pageId="9" pageNumber="10">ca.</emphasis>
70% intact, posterior half
<emphasis id="B2B1EABE001A1764FAECF844FA8CF822" box="[1342,1376,1947,1970]" italics="true" pageId="9" pageNumber="10">ca.</emphasis>
50% intact of which posteroventral region almost totally absent, if shell assumed to be typical; only segments of margin that are (possibly) intact are short (
<emphasis id="B2B1EABE00191767FDC9FF46FDD1FF20" box="[539,573,153,176]" italics="true" pageId="10" pageNumber="11">ca.</emphasis>
<quantity id="473D9B4900191767FD91FF47FD69FF20" box="[579,645,152,176]" metricMagnitude="-3" metricUnit="m" metricValue="1.0" pageId="10" pageNumber="11" unit="mm" value="1.0">1 mm</quantity>
) anterodorsal portion and even shorter (
<emphasis id="B2B1EABE00191767FB90FF46FB88FF20" box="[1090,1124,153,176]" italics="true" pageId="10" pageNumber="11">ca.</emphasis>
<quantity id="473D9B4900191767FBB8FF47FB2CFF20" box="[1130,1216,152,176]" metricMagnitude="-4" metricUnit="m" metricValue="4.0" pageId="10" pageNumber="11" unit="mm" value="0.4">0.4 mm</quantity>
) anteroventral part; at least nine strong, wide internal radial ribs emanate from beak region, widely and more or less evenly spaced, anteriormost six with gentle curvature away from posterior margin, posteriormost three straight for their short continuation before they are cut off by erosion, two anteroventral ribs are preserved in entirety to show rounded terminations at
<emphasis id="B2B1EABE00191767FE97FEF6FE8AFED0" box="[325,358,297,320]" italics="true" pageId="10" pageNumber="11">ca.</emphasis>
90% of distance from beak to margin; small umbonal notch present.
</paragraph>
</subSubSection>
<subSubSection id="C8DF652700191767FF15FE93FD51FDF2" pageId="10" pageNumber="11" type="discussion">
<paragraph id="807A36AC00191767FF15FE93FD51FDF2" blockId="10.[151,1436,151,611]" pageId="10" pageNumber="11">
<emphasis id="B2B1EABE00191767FF15FE93FED7FEF5" bold="true" box="[199,315,332,357]" pageId="10" pageNumber="11">Remarks.</emphasis>
The specimen is a partial internal mould that does not yield sufficient information for confident specific placement. What remains of it is comparable to the Mangapanian (late Pliocene)Recent
<taxonomicName id="47C54D2F00191767FB27FEAEFE68FE3D" authority="Dell, 1956" authorityName="Dell" authorityYear="1956" class="Bivalvia" family="Propeamussiidae" genus="Parvamussium" kingdom="Animalia" order="Pectinoida" pageId="10" pageNumber="11" phylum="Mollusca" rank="species" species="maorium">
<emphasis id="B2B1EABE00191767FB27FEAEFF10FE3C" italics="true" pageId="10" pageNumber="11">Parvamussium maorium</emphasis>
<bibRefCitation id="E4544B5D00191767FEDAFE4BFE68FE3D" author="Dell" box="[264,388,404,429]" pageId="10" pageNumber="11" refString="Dell, R. K. (1956) The archibenthal Mollusca of New Zealand. Bulletin of the Dominion Museum, Wellington, 18, 1 - 235." type="journal article" year="1956">Dell, 1956</bibRefCitation>
</taxonomicName>
(
<figureCitation id="18FE2A2900191767FE45FE4BFE32FE3C" box="[407,478,404,429]" captionStart="FIGURE 3" captionStartId="5.[151,250,1064,1086]" captionTargetBox="[150,1436,447,1043]" captionTargetId="figure@5.[150,1436,447,1043]" captionTargetPageId="5" captionText="FIGURE 3. Bivalves of uncertain sub-familial identity. A. Small (? juvenile) protobranch bivalve from Bexhaven. Specimen L 4646. Internal mould showing taxodont dentition typical of this group. Scale bar is 0.5 mm. B. Solemyidae gen. indet. Specimen L 4649 from Moonlight North. Scale bar is 5 mm. B 1. Lateral view of right valve. B 2. Lateral view of right valve, faint radial striations highlighted. B 3. Lateral view of left valve. B 4. Dorsal view." httpUri="https://zenodo.org/record/272154/files/figure.png" pageId="10" pageNumber="11">Fig. 3</figureCitation>
B2) from several localities throughout New Zealand. The radial ribs of the fossil specimen are of similar size, spacing, and position relative to the umbo compared to the modern species. The rounded terminations of the ribs, at 90% of the beakmargin distance, in the fossil specimen also are typical of
<taxonomicName id="47C54D2F00191767FA55FE3FFF10FD8B" class="Bivalvia" family="Propeamussiidae" genus="Parvamussium" kingdom="Animalia" order="Pectinoida" pageId="10" pageNumber="11" phylum="Mollusca" rank="species" species="maorium">
<emphasis id="B2B1EABE00191767FA55FE3FFF10FD8B" italics="true" pageId="10" pageNumber="11">P. maorium</emphasis>
</taxonomicName>
, and the umbonal notch is of a similar size in both species. The portions of intact margin in the fossil species also are of a similar shape and position relative to the umbo and ribs to that of
<taxonomicName id="47C54D2F00191767FBA1FDF7FB19FDAF" box="[1139,1269,552,575]" class="Bivalvia" family="Propeamussiidae" genus="Parvamussium" kingdom="Animalia" order="Pectinoida" pageId="10" pageNumber="11" phylum="Mollusca" rank="species" species="maorium">
<emphasis id="B2B1EABE00191767FBA1FDF7FB19FDAF" box="[1139,1269,552,575]" italics="true" pageId="10" pageNumber="11">P. maorium</emphasis>
</taxonomicName>
, and the fossil specimen is of a similar size to adult
<taxonomicName id="47C54D2F00191767FDE4FD93FD5BFDF3" box="[566,695,588,611]" class="Bivalvia" family="Propeamussiidae" genus="Parvamussium" kingdom="Animalia" order="Pectinoida" pageId="10" pageNumber="11" phylum="Mollusca" rank="species" species="maorium">
<emphasis id="B2B1EABE00191767FDE4FD93FD5BFDF3" box="[566,695,588,611]" italics="true" pageId="10" pageNumber="11">P. maorium</emphasis>
</taxonomicName>
.
</paragraph>
</subSubSection>
</treatment>
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