254 lines
28 KiB
XML
254 lines
28 KiB
XML
<document id="35752204462509DE38AE4E85F9AE499B" ID-DOI="10.11646/zootaxa.3741.3.2" ID-GBIF-Dataset="e8d6b04e-4c6e-40e1-8713-dcff293fd351" ID-ISSN="1175-5326" ID-Zenodo-Dep="223594" ID-ZooBank="B9A125E1-1FB0-47BC-8182-EC4DF76EEDD7" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1460703701250" checkinUser="plazi" docAuthor="Grant-Mackie, John A." docDate="2013" docId="03D57731FFB0D820F3C9025DE6455DFA" docLanguage="en" docName="zt03741p348.pdf" docOrigin="Zootaxa 3741 (3)" docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article" docStyleId="647186512141C8FC8976D5BCC54AEB7D" docStyleName="Zootaxa.2013-.journal_article" docStyleVersion="9" docTitle="Makoiamya Grant-Mackie, 2013, n. gen." docType="treatment" docVersion="9" lastPageNumber="330" masterDocId="FFEC0F49FFB1D823F35E0757E3755A0E" masterDocTitle="Makoiamya cotterallae, a new genus and species of bivalve (Ceratomyidae) from the latest Triassic of New Zealand and New Caledonia" masterLastPageNumber="348" masterPageNumber="327" pageNumber="328" updateTime="1698356710086" updateUser="plazi">
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<mods:title id="8A3D9572A7B8CF6DAF20411FFAD34E3C">Makoiamya cotterallae, a new genus and species of bivalve (Ceratomyidae) from the latest Triassic of New Zealand and New Caledonia</mods:title>
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<mods:namePart id="FFE18067A034F77D29E5E4EEB48CA367">Grant-Mackie, John A.</mods:namePart>
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<mods:typeOfResource id="FB1B1E58BBAC83F1D6DD9DC0AC149007">text</mods:typeOfResource>
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<mods:title id="585310C1E056D5ED9AAA404AF354879A">Zootaxa</mods:title>
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<mods:part id="EB7CF1D547E9F264A00A0BEB76E304FC">
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<mods:date id="ECC6957948297A81618C17D2B21D446F">2013</mods:date>
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<mods:number id="51C59B34E3B10E4FB134E085699E9D94">3741</mods:number>
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<mods:number id="196887843F94FC564AC29B3A0D2C6369">3</mods:number>
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<treatment id="03D57731FFB0D820F3C9025DE6455DFA" ID-DOI="http://doi.org/10.5281/zenodo.6163847" ID-GBIF-Taxon="119583654" ID-Zenodo-Dep="6163847" LSID="urn:lsid:plazi:treatment:03D57731FFB0D820F3C9025DE6455DFA" httpUri="http://treatment.plazi.org/id/03D57731FFB0D820F3C9025DE6455DFA" lastPageId="3" lastPageNumber="330" pageId="1" pageNumber="328">
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<subSubSection id="C36695ACFFB0D822F3C9025DE2A35F2A" box="[151,470,1289,1316]" pageId="1" pageNumber="328" type="nomenclature">
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<paragraph id="8BC3C627FFB0D822F3C9025DE2A35F2A" blockId="1.[151,470,1289,1316]" box="[151,470,1289,1316]" pageId="1" pageNumber="328">
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<heading id="D08B714BFFB0D822F3C9025DE2A35F2A" bold="true" box="[151,470,1289,1316]" fontSize="11" level="1" pageId="1" pageNumber="328" reason="1">
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<emphasis id="B9081A35FFB0D822F3C9025DE2A35F2A" bold="true" box="[151,470,1289,1316]" pageId="1" pageNumber="328">
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Genus
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<taxonomicName id="4C7CBDA4FFB0D822F3B0025EE20B5F2D" box="[238,382,1289,1315]" class="Bivalvia" family="Ceratomyidae" genus="Makoiamya" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pholadomyoida" pageId="1" pageNumber="328" phylum="Mollusca" rank="genus" status="gen. nov.">
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<emphasis id="B9081A35FFB0D822F3B0025EE20B5F2D" bold="true" box="[238,382,1289,1315]" italics="true" pageId="1" pageNumber="328">Makoiamya</emphasis>
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</taxonomicName>
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<taxonomicNameLabel id="A23BA74EFFB0D822F2DA025DE2A35F2A" box="[388,470,1290,1316]" pageId="1" pageNumber="328" rank="genus">n. gen.</taxonomicNameLabel>
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</emphasis>
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</heading>
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</paragraph>
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</subSubSection>
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<subSubSection id="C36695ACFFB0D822F3C90207E7325F83" pageId="1" pageNumber="328" type="materials_examined">
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<paragraph id="8BC3C627FFB0D822F3C90207E7325F83" blockId="1.[151,1436,1360,1997]" pageId="1" pageNumber="328">
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<emphasis id="B9081A35FFB0D822F3C90207E24D5F67" bold="true" box="[151,312,1360,1385]" pageId="1" pageNumber="328">
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<typeStatus id="54C77885FFB0D822F3C90207E3A75F67" box="[151,210,1360,1385]" pageId="1" pageNumber="328">Type</typeStatus>
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Species.
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</emphasis>
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<taxonomicName id="4C7CBDA4FFB0D822F21F0207E1325F67" box="[321,583,1360,1385]" class="Bivalvia" family="Ceratomyidae" genus="Makoiamya" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pholadomyoida" pageId="1" pageNumber="328" phylum="Mollusca" rank="species" species="cotterallae" status="sp. nov.">
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<emphasis id="B9081A35FFB0D822F21F0207E1325F67" box="[321,583,1360,1385]" italics="true" pageId="1" pageNumber="328">Makoiamya cotterallae</emphasis>
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</taxonomicName>
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<taxonomicNameLabel id="A23BA74EFFB0D822F1110206E1FA5F66" box="[591,655,1361,1384]" pageId="1" pageNumber="328" rank="species">n. sp.</taxonomicNameLabel>
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, Late Warepan (Marokopan)–Otapirian (Late Norian–Rhaetian; Late Triassic) of Murihiku Terrane,
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<collectingCountry id="F36B86B7FFB0D822F2AF0222E1FF5F83" box="[497,650,1396,1421]" name="New Zealand" pageId="1" pageNumber="328">New Zealand</collectingCountry>
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, and Téremba Terrane,
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<collectingCountry id="F36B86B7FFB0D822F0CC0222E7365F83" box="[914,1091,1396,1421]" name="New Caledonia" pageId="1" pageNumber="328">New Caledonia</collectingCountry>
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.
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</paragraph>
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</subSubSection>
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<subSubSection id="C36695ACFFB0D822F39902CFE6095FF7" pageId="1" pageNumber="328" type="etymology">
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<paragraph id="8BC3C627FFB0D822F39902CFE6095FF7" blockId="1.[151,1436,1360,1997]" pageId="1" pageNumber="328">
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<emphasis id="B9081A35FFB0D822F39902CFE23B5FBF" bold="true" box="[199,334,1432,1457]" pageId="1" pageNumber="328">Etymology.</emphasis>
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From Maori ‘makoi’, a shell; it can also mean a tricky question, which latter emphasises my early difficulties in the classification of this fossil, plus ‘-a-mya’ to coincide with the suffixes of many generic names within this and related families (‘makoi’ also means a sharp-pointed object, not relevant here); feminine gender.
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</paragraph>
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</subSubSection>
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<subSubSection id="C36695ACFFB0D822F3990153E0AA5C6B" pageId="1" pageNumber="328" type="diagnosis">
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<paragraph id="8BC3C627FFB0D822F3990153E0AA5C6B" blockId="1.[151,1436,1360,1997]" pageId="1" pageNumber="328">
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<emphasis id="B9081A35FFB0D822F3990153E2345C13" bold="true" box="[199,321,1540,1565]" pageId="1" pageNumber="328">Diagnosis.</emphasis>
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Ceratomyid of moderate size, thick-shelled, oval to subtrigonal in outline, well inflated, equivalved, edentulous except for faint swelling on hinge plate below RV beak and short nymph posteriorly; beaks prosogyrous, enrolled, margins entire, not gaping; no lunule or escutcheon.
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</paragraph>
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</subSubSection>
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<subSubSection id="C36695ACFFB0D822F3990127E24C5D32" pageId="1" pageNumber="328" type="description">
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<paragraph id="8BC3C627FFB0D822F3990127E24C5D32" blockId="1.[151,1436,1360,1997]" pageId="1" pageNumber="328">
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<emphasis id="B9081A35FFB0D822F3990127E22C5C87" bold="true" box="[199,345,1648,1673]" pageId="1" pageNumber="328">Description.</emphasis>
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Ceratomyid of moderate size, equivalve, inequilateral, well inflated, with no posterior gape or dentate margins; rounded posteroventral ridge passes from well inflated umbo to rounded-angular posteroventral margin, with slightly flattened or excavated area behind; hinge plate edentulous but with low boss posteroventral to beak and nymph parallel to hinge margin posteriorly, with ventral emargination of hinge-plate between boss and nymph; exterior unsculptured except for fine commarginal growth lines; adductor muscle scars and pallial line not certainly seen.
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</paragraph>
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</subSubSection>
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<subSubSection id="C36695ACFFB0D820F399001FE6455DFA" lastPageId="3" lastPageNumber="330" pageId="1" pageNumber="328" type="discussion">
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<paragraph id="8BC3C627FFB0D822F399001FE3935DC3" blockId="1.[151,1436,1360,1997]" pageId="1" pageNumber="328">
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<emphasis id="B9081A35FFB0D822F399001FE24E5D6F" bold="true" box="[199,315,1864,1889]" pageId="1" pageNumber="328">Remarks.</emphasis>
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Earlier records as
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<taxonomicName id="4C7CBDA4FFB0D822F148001FE1B35D6F" box="[534,710,1864,1889]" class="Bivalvia" family="Trigonodidae" genus="Anodontophora" higherTaxonomySource="GBIF" kingdom="Animalia" order="Unionoida" pageId="1" pageNumber="328" phylum="Mollusca" rank="genus">
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<emphasis id="B9081A35FFB0D822F148001FE1B35D6F" box="[534,710,1864,1889]" italics="true" pageId="1" pageNumber="328">Anodontophora</emphasis>
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</taxonomicName>
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(=
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<emphasis id="B9081A35FFB0D822F1B0001EE0115D6E" box="[750,868,1865,1888]" italics="true" pageId="1" pageNumber="328">
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<taxonomicName id="4C7CBDA4FFB0D822F1B0001EE0295D6E" box="[750,860,1865,1888]" class="Bivalvia" family="Trigonodidae" genus="Unionites" higherTaxonomySource="GBIF" kingdom="Animalia" order="Unionoida" pageId="1" pageNumber="328" phylum="Mollusca" rank="genus">Unionites</taxonomicName>
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)
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</emphasis>
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cannot be upheld for our fossils, given the latter’s considerable inflation, its thick shell material, and its weaker hinge details. Other genera of the family
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<taxonomicName id="4C7CBDA4FFB0D822F3C900C7E2375DA7" box="[151,322,1936,1961]" class="Bivalvia" family="Pachycardiidae" higherTaxonomySource="GBIF" kingdom="Animalia" order="Unionoida" pageId="1" pageNumber="328" phylum="Mollusca" rank="family">Pachycardiidae</taxonomicName>
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can also not accommodate these shells because of their much weaker dentition (see Cox, 1969a, p.467).
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</paragraph>
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<caption id="DF0396AFFFB3D821F3C902E4E2CF5FE4" httpUri="https://zenodo.org/record/223596/files/figure.png" pageId="2" pageNumber="329" targetBox="[279,1307,195,1435]" targetPageId="2">
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<paragraph id="8BC3C627FFB3D821F3C902E4E2CF5FE4" blockId="2.[151,1436,1458,1514]" pageId="2" pageNumber="329">
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<emphasis id="B9081A35FFB3D821F3C902E4E26E5FC4" bold="true" box="[151,283,1459,1482]" pageId="2" pageNumber="329">FIGURE 2.</emphasis>
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Localities within New Zealand that have yielded
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<emphasis id="B9081A35FFB3D821F06002E5E74A5FC4" box="[830,1087,1458,1482]" italics="true" pageId="2" pageNumber="329">
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<taxonomicName id="4C7CBDA4FFB3D821F06002E5E74E5FC4" box="[830,1083,1458,1482]" class="Bivalvia" family="Ceratomyidae" genus="Makoiamya" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pholadomyoida" pageId="2" pageNumber="329" phylum="Mollusca" rank="species" species="cotterallae">Makoiamya cotterallae</taxonomicName>
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.
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</emphasis>
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For more precise locations see Figures 3–8 and Appendix.
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</paragraph>
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</caption>
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<paragraph id="8BC3C627FFB3D821F3990144E1105D42" blockId="2.[151,1436,1555,2012]" pageId="2" pageNumber="329">
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Grant-Mackie’s (1981
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<emphasis id="B9081A35FFB3D821F29B0142E1705C22" box="[453,517,1557,1580]" italics="true" pageId="2" pageNumber="329">et seq</emphasis>
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.) postulated link with the northern Pacific ceratomyid
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<taxonomicName id="4C7CBDA4FFB3D821F7390144E79D5C22" box="[1127,1256,1555,1580]" class="Bivalvia" family="Megadesmidae" genus="Ochotomya" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pholadomyoida" pageId="2" pageNumber="329" phylum="Mollusca" rank="genus">
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<emphasis id="B9081A35FFB3D821F7390144E79D5C22" box="[1127,1256,1555,1580]" italics="true" pageId="2" pageNumber="329">Ochotomya</emphasis>
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</taxonomicName>
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took account of the inflation, suboval outline, weak dentition and lack of sculpture of the two genera, but the thick shell material of our specimens and the absence of subsidiary features anterior and posterior to the beak (see Polubotko 1966, unnumbered text figure p. 14;
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<figureCitation id="1347DAA2FFB3D821F2A70128E13E5C96" box="[505,587,1663,1688]" captionStart="FIGURE 12. A" captionStartId="13.[151,255,1579,1602]" captionTargetBox="[282,1304,590,1557]" captionTargetId="figure@13.[282,1304,590,1557]" captionTargetPageId="13" captionText="FIGURE 12. A. Restoration of RV of Makoiamya cotterallae, in internal view (based especially on Fig. 10 B, D, E, G, and J). B. Ceratomya aalensis (Quenstedt), Middle Jurassic, France; RV (upper) and LV internal views (from Cox 1969 b). C. Unionites rectus (Gümbel), Upper Triassic, Tyrol; RV internal; U. muensteri Wissmann, Upper Triassic, Tyrol; RV external (from Cox 1969 a). D. Dorsal view of generalised internal cast of LV of Ochotomya, showing, in negative relief, characteristic hinge features; a = low, broad groove, b = tooth-like projection, c = two shallow furrows (after Polubotko 1966, p. 14). Scale bars demonstrate the length of each valve." httpUri="https://zenodo.org/record/223604/files/figure.png" pageId="2" pageNumber="329">Fig. 12</figureCitation>
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D) prevent a close association of the two. Examination of a suite of casts provided by Dr Polubotko, including the
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<typeStatus id="54C77885FFB3D821F12D01F4E1955CB2" box="[627,736,1699,1724]" pageId="2" pageNumber="329" type="holotype">holotypes</typeStatus>
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of the
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<typeStatus id="54C77885FFB3D821F06901F3E0125CB2" box="[823,871,1700,1724]" pageId="2" pageNumber="329">type</typeStatus>
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species and of his
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<emphasis id="B9081A35FFB3D821F71901F3E7985CB2" box="[1095,1261,1699,1724]" italics="true" pageId="2" pageNumber="329">
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<taxonomicName id="4C7CBDA4FFB3D821F71901F3E79C5CB2" box="[1095,1257,1699,1724]" class="Bivalvia" family="Megadesmidae" genus="Ochotomya" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pholadomyoida" pageId="2" pageNumber="329" phylum="Mollusca" rank="species" species="terechovae">O. terechovae</taxonomicName>
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,
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</emphasis>
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shows that the hinge and umbonal area pose the greatest differences between the two groups. Polubotko’s diagnosis also refers to the presence of a weak right-angled pallial sinus, but neither on the Siberian specimens, nor in the figures in Polubotko (1966), nor on specimens from Heilongjiang Province, northeastern
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<collectingCountry id="F36B86B7FFB3D821F7760058E71B5D26" box="[1064,1134,1807,1832]" name="China" pageId="2" pageNumber="329">China</collectingCountry>
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, seen by me (unpublished record), can any pallial line be discerned.
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</paragraph>
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<paragraph id="8BC3C627FFB3D821F3990000E2845DD2" blockId="2.[151,1436,1555,2012]" pageId="2" pageNumber="329">
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Nonetheless, a familial relationship does seem likely. The
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<taxonomicName id="4C7CBDA4FFB3D821F0100000E09E5D7E" box="[846,1003,1879,1904]" class="Bivalvia" family="Ceratomyidae" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pholadomyoida" pageId="2" pageNumber="329" phylum="Mollusca" rank="family">Ceratomyidae</taxonomicName>
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are characterised (Cox, 1969b, p. 838) as ovate shells, longer than high, equivalve, moderately to strongly inflated, with prosogyrous beaks, opisthodetic subinternal ligament on the thickened posterodorsal margin of the LV, no true hinge teeth, generally no gape, and lacking lunule and escutcheon.
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</paragraph>
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<caption id="DF0396AFFFB2D820F3C90484E2305E04" httpUri="https://zenodo.org/record/223597/files/figure.png" pageId="3" pageNumber="330" targetBox="[412,1174,194,957]" targetPageId="3">
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<paragraph id="8BC3C627FFB2D820F3C90484E2305E04" blockId="3.[151,1436,979,1034]" pageId="3" pageNumber="330">
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<emphasis id="B9081A35FFB2D820F3C90484E26F59E4" bold="true" box="[151,282,979,1002]" pageId="3" pageNumber="330">FIGURE 3.</emphasis>
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Part of the southwest Kawhia coast, southwest Auckland, showing localities listed in Appendix 1 (part of map sheet R15).
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</paragraph>
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</caption>
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<paragraph id="8BC3C627FFB2D820F3990363E0CE5F62" blockId="3.[151,1436,1075,2036]" pageId="3" pageNumber="330">
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In all features except the shell thickness our specimens can readily fit into the
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<taxonomicName id="4C7CBDA4FFB2D820F76D0364E7A15E42" box="[1075,1236,1075,1100]" class="Bivalvia" family="Ceratomyidae" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pholadomyoida" pageId="3" pageNumber="330" phylum="Mollusca" rank="family">Ceratomyidae</taxonomicName>
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. The definition of the family would need to be only slightly broadened to accommodate them. Cox (1969b, fig. F18a, b) illustrated valves of the French Kimmeridgian
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<taxonomicName id="4C7CBDA4FFB2D820F168032BE0995E9A" authority="Roemer, 1836" authorityName="Roemer" authorityYear="1836" box="[566,1004,1147,1172]" class="Bivalvia" family="Ceratomyidae" genus="Ceratomya" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pholadomyoida" pageId="3" pageNumber="330" phylum="Mollusca" rank="species" species="excentrica">
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<emphasis id="B9081A35FFB2D820F168032BE0445E9D" box="[566,817,1148,1171]" italics="true" pageId="3" pageNumber="330">Ceratomya excentrica</emphasis>
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(Roemer, 1836)
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</taxonomicName>
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and Bajocian
|
||
<taxonomicName id="4C7CBDA4FFB2D820F7CD032BE3AD5EB6" authority="Quenstedt, 1858" authorityName="Quenstedt" authorityYear="1858" class="Bivalvia" family="Ceratomyidae" genus="Ceratomya" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pholadomyoida" pageId="3" pageNumber="330" phylum="Mollusca" rank="species" species="aalensis">
|
||
<emphasis id="B9081A35FFB2D820F7CD032BE6645E9A" box="[1171,1297,1147,1172]" italics="true" pageId="3" pageNumber="330">C. aalensis</emphasis>
|
||
(Quenstedt, 1858)
|
||
</taxonomicName>
|
||
showing quite well thickened hinge plates, and little genetic change would have been required to produce a more extensively thickened shell. The right hinge in
|
||
<taxonomicName id="4C7CBDA4FFB2D820F1B20394E0055ED2" box="[748,880,1219,1244]" class="Bivalvia" family="Ceratomyidae" genus="Makoiamya" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pholadomyoida" pageId="3" pageNumber="328" phylum="Mollusca" rank="genus" status="gen. nov.">
|
||
<emphasis id="B9081A35FFB2D820F1B20394E0055ED2" box="[748,880,1219,1244]" italics="true" pageId="3" pageNumber="330">Makoiamya</emphasis>
|
||
</taxonomicName>
|
||
is excavated behind and slightly below the beak, with a swelling in front and a nymph behind, and in these characters it approximates
|
||
<taxonomicName id="4C7CBDA4FFB2D820F71003BFE6ED5F0E" authority="Sandberger, 1864" authorityName="Sandberger" authorityYear="1864" box="[1102,1432,1255,1280]" class="Bivalvia" family="Ceratomyidae" genus="Ceratomya" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pholadomyoida" pageId="3" pageNumber="330" phylum="Mollusca" rank="genus">
|
||
<emphasis id="B9081A35FFB2D820F71003BFE7BE5EF1" box="[1102,1227,1256,1279]" italics="true" pageId="3" pageNumber="330">Ceratomya</emphasis>
|
||
Sandberger, 1864
|
||
</taxonomicName>
|
||
, (see Cox, 1969b, fig. F18c).
|
||
<taxonomicName id="4C7CBDA4FFB2D820F286025BE1205F2D" box="[472,597,1292,1315]" class="Bivalvia" family="Ceratomyidae" genus="Ceratomya" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pholadomyoida" pageId="3" pageNumber="330" phylum="Mollusca" rank="genus">
|
||
<emphasis id="B9081A35FFB2D820F286025BE1205F2D" box="[472,597,1292,1315]" italics="true" pageId="3" pageNumber="330">Ceratomya</emphasis>
|
||
</taxonomicName>
|
||
is itself a cosmopolitan Jurassic genus, the only other Triassic ceratomyid,
|
||
<emphasis id="B9081A35FFB2D820F3C90267E2765F49" box="[151,259,1328,1351]" italics="true" pageId="3" pageNumber="330">Pteromya</emphasis>
|
||
Moore, 1861, being more elongate, less inflated, and often showing weak concentric sculpture. This family is nevertheless accepted as a suitable location for the new genus.
|
||
</paragraph>
|
||
<paragraph id="8BC3C627FFB2D820F3990220E0C35CBE" blockId="3.[151,1436,1075,2036]" pageId="3" pageNumber="330">
|
||
The only other previously described thick-shelled pholadomyoids are a few
|
||
<taxonomicName id="4C7CBDA4FFB2D820F7DF0220E65A5F9E" box="[1153,1327,1399,1424]" class="Bivalvia" family="Pholadomyidae" kingdom="Animalia" order="Anomalodesmata" pageId="3" pageNumber="330" phylum="Mollusca" rank="family">Pholadomyidae</taxonomicName>
|
||
and the
|
||
<taxonomicName id="4C7CBDA4FFB2D820F3C902CCE2315FBA" box="[151,324,1435,1460]" class="Bivalvia" family="Megadesmidae" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pholadomyoida" pageId="3" pageNumber="330" phylum="Mollusca" rank="family">Megadesmidae</taxonomicName>
|
||
, the latter a Permo–Carboniferous family of generally large to moderate-sized oval, equivalved burrowing bivalves.
|
||
<taxonomicName id="4C7CBDA4FFB2D820F2CF02E8E14F5FD6" box="[401,570,1471,1496]" class="Bivalvia" family="Megadesmidae" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pholadomyoida" pageId="3" pageNumber="330" phylum="Mollusca" rank="family">Megadesmidae</taxonomicName>
|
||
are integripalliate, with subequal muscle scars, incurved beaks, often prosogyrous, and no surface ornament; they have prominent nymphs with a single blunt tooth in the RV and rarely in the LV. Some genera, e.g.,
|
||
<taxonomicName id="4C7CBDA4FFB2D820F2BE015FE1B55C2E" authority="Dana, 1847" authorityName="Dana" authorityYear="1847" box="[480,704,1544,1568]" class="Insecta" family="Notodontidae" genus="Myonia" kingdom="Animalia" order="Lepidoptera" pageId="3" pageNumber="330" phylum="Arthropoda" rank="genus">
|
||
<emphasis id="B9081A35FFB2D820F2BE015FE1405C11" box="[480,565,1544,1567]" italics="true" pageId="3" pageNumber="330">Myonia</emphasis>
|
||
Dana, 1847
|
||
</taxonomicName>
|
||
,
|
||
<taxonomicName id="4C7CBDA4FFB2D820F192015FE0CF5C2E" authority="Dana, 1847" authorityName="Dana" authorityYear="1847" box="[716,954,1544,1568]" class="Bivalvia" family="Megadesmidae" genus="Pyramus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pholadomyoida" pageId="3" pageNumber="330" phylum="Mollusca" rank="genus">
|
||
<emphasis id="B9081A35FFB2D820F192015FE0455C11" box="[716,816,1544,1567]" italics="true" pageId="3" pageNumber="330">Pyramus</emphasis>
|
||
Dana, 1847
|
||
</taxonomicName>
|
||
,
|
||
<taxonomicName id="4C7CBDA4FFB2D820F09B0150E7AB5C2E" authority="Dun, 1932" authorityName="Dun" authorityYear="1932" box="[965,1246,1543,1568]" class="Bivalvia" family="Sanguinolitidae" genus="Pachymyonia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pholadomyoida" pageId="3" pageNumber="330" phylum="Mollusca" rank="genus">
|
||
<emphasis id="B9081A35FFB2D820F09B0150E7285C2E" box="[965,1117,1543,1568]" italics="true" pageId="3" pageNumber="330">Pachymyonia</emphasis>
|
||
Dun, 1932
|
||
</taxonomicName>
|
||
, are too elongate to be appropriate for the new species whereas
|
||
<taxonomicName id="4C7CBDA4FFB2D820F1EF017CE0365C4A" box="[689,835,1579,1604]" class="Bivalvia" family="Megadesmidae" genus="Megadesmus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pholadomyoida" pageId="3" pageNumber="330" phylum="Mollusca" rank="genus">
|
||
<emphasis id="B9081A35FFB2D820F1EF017CE0365C4A" box="[689,835,1579,1604]" italics="true" pageId="3" pageNumber="330">Megadesmus</emphasis>
|
||
</taxonomicName>
|
||
J. de C. Sowerby in Mitchel, 1838, is short but too inequilateral. Megadesmids are prominent members of Australasian Permian marine faunas (e.g., Runnegar 1965; Waterhouse 1969) but none of these Permian genera can readily accommodate our Triassic form, and the somewhat more differentiated dentition does not allow its inclusion in that family.
|
||
</paragraph>
|
||
<paragraph id="8BC3C627FFB2D820F39901EBE6275CF6" blockId="3.[151,1436,1075,2036]" pageId="3" pageNumber="330">
|
||
Late Cretaceous
|
||
<taxonomicName id="4C7CBDA4FFB2D820F2D401ECE28B5CDA" box="[394,510,1723,1748]" class="Bivalvia" family="Pholadomyidae" genus="Pachymya" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pholadomyoida" pageId="3" pageNumber="330" phylum="Mollusca" rank="genus">
|
||
<emphasis id="B9081A35FFB2D820F2D401ECE28B5CDA" box="[394,510,1723,1748]" italics="true" pageId="3" pageNumber="330">Pachymya</emphasis>
|
||
</taxonomicName>
|
||
J. de C. Sowerby, 1826, and the Middle to Late Jurassic
|
||
<taxonomicName id="4C7CBDA4FFB2D820F7FA01ECE6555CDA" box="[1188,1312,1723,1748]" class="Bivalvia" family="Pholadomyidae" genus="Machomya" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pholadomyoida" pageId="3" pageNumber="330" phylum="Mollusca" rank="genus">
|
||
<emphasis id="B9081A35FFB2D820F7FA01ECE6555CDA" box="[1188,1312,1723,1748]" italics="true" pageId="3" pageNumber="330">Machomya</emphasis>
|
||
</taxonomicName>
|
||
de Loriol, 1868, are elongate strongly inequilateral shells and thus cannot be regarded as congeneric with our material.
|
||
</paragraph>
|
||
<paragraph id="8BC3C627FFB2D820F3990054E6025D86" blockId="3.[151,1436,1075,2036]" pageId="3" pageNumber="330">
|
||
Other generic names have been applied to
|
||
<collectingCountry id="F36B86B7FFB2D820F1F90053E0485D12" box="[679,829,1795,1820]" name="New Zealand" pageId="3" pageNumber="330">New Zealand</collectingCountry>
|
||
late Triassic–Jurassic bivalves with poorly developed hinge structures and no ornament: e.g., the already mentioned
|
||
<emphasis id="B9081A35FFB2D820F00E0070E7725D4E" box="[848,1031,1831,1856]" italics="true" pageId="3" pageNumber="330">
|
||
<taxonomicName id="4C7CBDA4FFB2D820F00E0070E7765D4E" box="[848,1027,1831,1856]" class="Bivalvia" family="Trigonodidae" genus="Anodontophora" higherTaxonomySource="GBIF" kingdom="Animalia" order="Unionoida" pageId="3" pageNumber="330" phylum="Mollusca" rank="genus">Anodontophora</taxonomicName>
|
||
,
|
||
</emphasis>
|
||
and
|
||
<taxonomicName id="4C7CBDA4FFB2D820F7630070E6295D4E" authority="Agassiz, 1842" authorityName="Agassiz" authorityYear="1842" box="[1085,1372,1831,1856]" class="Bivalvia" family="Pleuromyidae" genus="Pleuromya" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pholadomyoida" pageId="3" pageNumber="330" phylum="Mollusca" rank="genus">
|
||
<emphasis id="B9081A35FFB2D820F7630070E7C25D4E" box="[1085,1207,1831,1856]" italics="true" pageId="3" pageNumber="330">Pleuromya</emphasis>
|
||
Agassiz, 1842
|
||
</taxonomicName>
|
||
(e.g., Marwick 1953), but neither of these at all closely approximate our present material, both of which are elongate shells without prominent umbones and with thin shell material, and
|
||
<taxonomicName id="4C7CBDA4FFB2D820F0CE0038E77F5D86" box="[912,1034,1903,1928]" class="Bivalvia" family="Pleuromyidae" genus="Pleuromya" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pholadomyoida" pageId="3" pageNumber="330" phylum="Mollusca" rank="genus">
|
||
<emphasis id="B9081A35FFB2D820F0CE0038E77F5D86" box="[912,1034,1903,1928]" italics="true" pageId="3" pageNumber="330">Pleuromya</emphasis>
|
||
</taxonomicName>
|
||
in addition has a posterior gape.
|
||
</paragraph>
|
||
<paragraph id="8BC3C627FFB2D820F39900C4E6455DFA" blockId="3.[151,1436,1075,2036]" pageId="3" pageNumber="330">
|
||
The above leads to the conclusion that these Late Triassic shells are best located in a new genus, for which
|
||
<taxonomicName id="4C7CBDA4FFB2D820F3C900E0E26E5DDE" box="[151,283,1975,2000]" class="Bivalvia" family="Ceratomyidae" genus="Makoiamya" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pholadomyoida" pageId="3" pageNumber="328" phylum="Mollusca" rank="genus" status="gen. nov.">
|
||
<emphasis id="B9081A35FFB2D820F3C900E0E26E5DDE" box="[151,283,1975,2000]" italics="true" pageId="3" pageNumber="330">Makoiamya</emphasis>
|
||
</taxonomicName>
|
||
is proposed. Although so far known only from
|
||
<collectingCountry id="F36B86B7FFB2D820F06C00EFE0BD5DDE" box="[818,968,1975,2000]" name="New Zealand" pageId="3" pageNumber="330">New Zealand</collectingCountry>
|
||
and
|
||
<collectingCountry id="F36B86B7FFB2D820F0A100EFE7DA5DDE" box="[1023,1199,1975,2000]" name="New Caledonia" pageId="3" pageNumber="330">New Caledonia</collectingCountry>
|
||
, it could be expected in nearby areas (
|
||
<collectingCountry id="F36B86B7FFB2D820F211008BE1595DFA" box="[335,556,2011,2036]" name="Papua New Guinea" pageId="3" pageNumber="330">Papua New Guinea</collectingCountry>
|
||
,
|
||
<collectingCountry id="F36B86B7FFB2D820F169008CE1EA5DFA" box="[567,671,2011,2036]" name="Antarctica" pageId="3" pageNumber="330">Antarctic</collectingCountry>
|
||
Peninsula–
|
||
<collectingCountry id="F36B86B7FFB2D820F07F008CE0E75DFA" box="[801,914,2011,2036]" name="Argentina" pageId="3" pageNumber="330">Argentina</collectingCountry>
|
||
) in similar lithologies/environments.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |