241 lines
26 KiB
XML
241 lines
26 KiB
XML
<document id="AF1BE25EAECCD18C4E02E5F65ED87A7A" ID-CLB-Dataset="3640" ID-DOI="10.1206/665.1" ID-GBIF-Dataset="da59bea2-040b-4052-b33c-1df67739a29d" ID-ISSN="0003-0082" ID-Zenodo-Dep="4735501" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1620069666063" checkinUser="felipe" docAuthor="Bi, Shundong, Meng, Jin, Wu, Wenyu, Ye, Jie & Ni, Xijun" docDate="2009" docId="03BDB214FFACC579FF35FD2D6335F996" docLanguage="en" docName="AmMusNovit.2009.3663.1-18.pdf" docOrigin="American Museum Novitates 3663" docSource="http://www.bioone.org/doi/abs/10.1206/665.1" docStyle="DocumentStyle:70DDF1BDF6846024993F05262BAE3001.3:AmMusNovit.2000-2010.journal_article.type1" docStyleId="70DDF1BDF6846024993F05262BAE3001" docStyleName="AmMusNovit.2000-2010.journal_article.type1" docStyleVersion="3" docTitle="Prodistylomys wangae Bi & Meng & Wu & Ye & Ni 2009, n. sp." docType="treatment" docVersion="9" lastPageNumber="13" masterDocId="FF84CA6CFFA0C575FFD7FFB46754FFD3" masterDocTitle="New Distylomyid Rodents (Mammalia: Rodentia) from the Early Miocene Suosuoquan Formation of Northern Xinjiang, China" masterLastPageNumber="20" masterPageNumber="1" pageNumber="13" updateTime="1698938204490" updateUser="ExternalLinkService" zenodo-license-document="CC-BY-4.0">
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<mods:titleInfo id="CC393178E0A4F3CD776B258F9255BF49">
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<mods:title id="3611DD88D0D80DB40D94581EAE969C62">New Distylomyid Rodents (Mammalia: Rodentia) from the Early Miocene Suosuoquan Formation of Northern Xinjiang, China</mods:title>
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<mods:namePart id="7384028FFCDAF747C84F1C825E344B73">Bi, Shundong</mods:namePart>
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<mods:roleTerm id="1BEDCE918ADE97F7C9164FBB1BE8B57D">Author</mods:roleTerm>
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<mods:namePart id="82B9F99BE7D8ACFF79678400B8D7756D">Meng, Jin</mods:namePart>
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<mods:namePart id="B107B8CFDC4CBDB72E5C9606597AC05F">Wu, Wenyu</mods:namePart>
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<mods:namePart id="BA01996A2332F06CE79C48EC47A19A37">Ye, Jie</mods:namePart>
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<mods:namePart id="D9BF9D4B6863DA93456D5D9D0751A235">Ni, Xijun</mods:namePart>
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<mods:typeOfResource id="56420828E23C4B1AC9CB1EC6137C4225">text</mods:typeOfResource>
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<mods:title id="CC259D6B53EC0767F1D6B4322E09B35E">American Museum Novitates</mods:title>
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<mods:part id="20C084D730F655285104EDAB15F04525">
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<mods:date id="F5DC7187478EAAFD1D147032CA013B1F">2009</mods:date>
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<mods:number id="3932E169D869303F478A999BFCBC0FED">2009-08-28</mods:number>
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<mods:number id="36D366069D24AB3502AE5F4135588658">3663</mods:number>
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<mods:identifier id="FDE5094076F0153012D8D93014A3CFB8" type="DOI">10.1206/665.1</mods:identifier>
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<treatment id="03BDB214FFACC579FF35FD2D6335F996" ID-DOI="http://doi.org/10.5281/zenodo.4735069" ID-GBIF-Taxon="190304527" ID-Zenodo-Dep="4735069" LSID="urn:lsid:plazi:treatment:03BDB214FFACC579FF35FD2D6335F996" httpUri="http://treatment.plazi.org/id/03BDB214FFACC579FF35FD2D6335F996" lastPageNumber="13" pageId="12" pageNumber="13">
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<subSubSection id="C30E5089FFACC579FF35FD2D657FFD62" box="[226,555,665,689]" pageId="12" pageNumber="13" type="nomenclature">
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<paragraph id="8BAB0302FFACC579FF35FD2D657FFD62" blockId="12.[226,555,665,689]" box="[226,555,665,689]" pageId="12" pageNumber="13">
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<heading id="D0E3B46EFFACC579FF35FD2D657FFD62" box="[226,555,665,689]" centered="true" fontSize="36" level="2" pageId="12" pageNumber="13" reason="8">
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<taxonomicName id="4C147881FFACC579FF35FD2D6688FD62" authority="Bi & Meng & Wu & Ye & Ni, 2009" authorityName="Bi & Meng & Wu & Ye & Ni" authorityYear="2009" box="[226,476,665,689]" class="Mammalia" family="Ctenodactylidae" genus="Prodistylomys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="12" pageNumber="13" phylum="Chordata" rank="species" species="wangae" status="sp. nov.">
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<emphasis id="B960DF10FFACC579FF35FD2D6688FD62" box="[226,476,665,689]" italics="true" pageId="12" pageNumber="13">Prodistylomys wangae</emphasis>
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</taxonomicName>
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,
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<taxonomicNameLabel id="A253626BFFACC579FE3BFD2D657FFD62" box="[492,555,665,689]" pageId="12" pageNumber="13" rank="species">n. sp.</taxonomicNameLabel>
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</heading>
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</paragraph>
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</subSubSection>
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<subSubSection id="C30E5089FFACC579FEF0FD7D66B2FD32" box="[295,486,713,737]" pageId="12" pageNumber="13" type="description">
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<paragraph id="8BAB0302FFACC579FEF0FD7D66B2FD32" blockId="12.[295,486,713,737]" box="[295,486,713,737]" pageId="12" pageNumber="13">
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<heading id="D0E3B46EFFACC579FEF0FD7D66B2FD32" box="[295,486,713,737]" centered="true" fontSize="36" level="3" pageId="12" pageNumber="13" reason="7">
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<figureCitation id="132F1F87FFACC579FEF0FD7D66DEFD32" box="[295,394,713,737]" captionStart="Fig" captionStartId="13.[112,150,1188,1210]" captionTargetBox="[91,611,210,1154]" captionTargetId="figure-398@13.[91,611,209,1154]" captionTargetPageId="13" captionText="Fig. 8. Prodistylomys wangae, n. sp. A. occlusal (A1) and labial (A2) view of right M3 (IVPP V16016.2). B, occlusal (B1) and labial (B2) view of left m1(IVPP V16016.5). C, occlusal view of cheekteeth of the holotype (IVPP V16016.1). Abbreviations: hf, hypoflexus; hfd, hypoflexid; msf, mesoflexus; msfd,mesoflexid." figureDoi="http://doi.org/10.5281/zenodo.4735518" httpUri="https://zenodo.org/record/4735518/files/figure.png" pageId="12" pageNumber="13">Figure 8</figureCitation>
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,
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<tableCitation id="C69636B9FFACC579FE4FFD7D66B2FD32" box="[408,486,713,737]" captionStart="TABLE 1" captionStartId="8.[817,890,567,586]" captionTargetBox="[88,1617,680,1371]" captionText="TABLE 1 Tooth measurements (number of specimens, mean, range, and standard deviation; in mm) of D. burqinensis, P. lii and P. wangae. L, length; W, width; AW, width of the trigon(id); PW, the width of the talon(id)" httpUri="http://table.plazi.org/id/DF6B538AFFA8C57DFCE6FD836339FD53" pageId="12" pageNumber="13" tableUuid="DF6B538AFFA8C57DFCE6FD836339FD53">table 1</tableCitation>
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</heading>
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</paragraph>
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||
</subSubSection>
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<subSubSection id="C30E5089FFACC579FF4DFD4E66B6FC0C" pageId="12" pageNumber="13" type="materials_examined">
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<paragraph id="8BAB0302FFACC579FF4DFD4E6647FC9F" blockId="12.[128,654,762,1754]" pageId="12" pageNumber="13">
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<materialsCitation id="3B7C095FFFACC579FF4DFD4E6647FC9F" ID-GBIF-Occurrence="3400176313" collectionCode="IVPP" pageId="12" pageNumber="13" specimenCode="V16016.1" specimenCount="1" typeStatus="holotype">
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<typeStatus id="54AFBDA0FFACC579FF4DFD4E6658FCC3" box="[154,268,762,786]" pageId="12" pageNumber="13" type="holotype">HOLOTYPE</typeStatus>
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:
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<collectionCode id="ED059BC7FFACC579FEFAFD4E663EFCC1" box="[301,362,762,786]" country="China" httpUri="http://grbio.org/cool/wd8c-kdma" name="Institute of Vertebrate Paleontology and Paleoanthropology" pageId="12" pageNumber="13">IVPP</collectionCode>
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<specimenCode id="DBB2AB79FFACC579FEA5FD4E668BFCC1" box="[370,479,762,786]" collectionCode="V" country="Canada" lsid="urn:lsid:biocol.org:col:13946" name="Royal British Columbia Museum - Herbarium" pageId="12" pageNumber="13" type="Museum">V16016.1</specimenCode>
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, right fragmentary mandible with broken incisor and complete p4–m2.
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</materialsCitation>
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</paragraph>
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<paragraph id="8BAB0302FFACC579FF4DFCE666B6FC0C" blockId="12.[128,654,762,1754]" pageId="12" pageNumber="13">
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REFERRED MATERIAL:
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<collectionCode id="ED059BC7FFACC579FE68FCE666A8FCB9" box="[447,508,850,874]" country="China" httpUri="http://grbio.org/cool/wd8c-kdma" name="Institute of Vertebrate Paleontology and Paleoanthropology" pageId="12" pageNumber="13">IVPP</collectionCode>
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<collectionCode id="ED059BC7FFACC579FDCBFCE66564FCB9" box="[540,560,850,874]" country="Canada" lsid="urn:lsid:biocol.org:col:13946" name="Royal British Columbia Museum - Herbarium" pageId="12" pageNumber="13" type="Museum">V</collectionCode>
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16016.2, right M3;
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<collectionCode id="ED059BC7FFACC579FF2DFCDB665AFC54" box="[250,270,879,903]" country="Canada" lsid="urn:lsid:biocol.org:col:13946" name="Royal British Columbia Museum - Herbarium" pageId="12" pageNumber="13" type="Museum">V</collectionCode>
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16016.3, left fragmentary mandible with broken i2–p4, and m1–m2;
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<collectionCode id="ED059BC7FFACC579FDCBFC396564FC76" box="[540,560,909,933]" country="Canada" lsid="urn:lsid:biocol.org:col:13946" name="Royal British Columbia Museum - Herbarium" pageId="12" pageNumber="13" type="Museum">V</collectionCode>
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16016.4, right fragmentary mandible with broken i2 and p4–m2;
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<collectionCode id="ED059BC7FFACC579FEC7FC736670FC0C" box="[272,292,967,991]" country="Canada" lsid="urn:lsid:biocol.org:col:13946" name="Royal British Columbia Museum - Herbarium" pageId="12" pageNumber="13" type="Museum">V</collectionCode>
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16016.5, left m1.
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</paragraph>
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</subSubSection>
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||
<subSubSection id="C30E5089FFACC579FF4DFC5167BDFB86" pageId="12" pageNumber="13" type="description">
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||
<paragraph id="8BAB0302FFACC579FF4DFC5167BDFB86" blockId="12.[128,654,762,1754]" pageId="12" pageNumber="13">
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<materialsCitation id="3B7C095FFFACC579FF4DFC5167B2FB86" ID-GBIF-Occurrence="3400176304" accessionNumber="XJ200601" collectionCode="AND" county="Burqin County" location="Miocene" municipality="Suosuoquan Formation" pageId="12" pageNumber="13" specimenCount="1" stateProvince="Xinjiang Uygur">
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LOCALITY
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<collectionCode id="ED059BC7FFACC579FEC0FC5E6610FC28" box="[279,324,1002,1019]" pageId="12" pageNumber="13">AND</collectionCode>
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AGE: Locality XJ200601 (47
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<emphasis id="B960DF10FFACC579FF74FBB667F9FBC9" bold="true" box="[163,173,1026,1050]" italics="true" pageId="12" pageNumber="13">°</emphasis>
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23.198
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<emphasis id="B960DF10FFACC579FF20FBB76654FBCA" bold="true" box="[247,256,1027,1049]" italics="true" pageId="12" pageNumber="13">9</emphasis>
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N, 86
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<emphasis id="B960DF10FFACC579FE96FBB6661FFBC9" bold="true" box="[321,331,1026,1050]" italics="true" pageId="12" pageNumber="13">°</emphasis>
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47.981
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<emphasis id="B960DF10FFACC579FE42FBB766CAFBCA" bold="true" box="[405,414,1027,1049]" italics="true" pageId="12" pageNumber="13">9</emphasis>
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E) in
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<collectingCounty id="62CA7B8EFFACC579FE37FBB665D9FBC9" box="[480,653,1026,1050]" pageId="12" pageNumber="13">Burqin County</collectingCounty>
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of
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<collectingRegion id="49D0CDE0FFACC579FF7EFBAB665AFBE4" box="[169,270,1055,1079]" country="China" name="Xinjiang Uygur" pageId="12" pageNumber="13">Xinjiang</collectingRegion>
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,
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<collectingMunicipality id="6BCF9978FFACC579FEF4FBAB6514FBE4" box="[291,576,1055,1079]" pageId="12" pageNumber="13">Suosuoquan Formation</collectingMunicipality>
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, early
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<location id="8ECB55D9FFACC579FF57FB8967B2FB86" LSID="urn:lsid:plazi:treatment:03BDB214FFACC579FF35FD2D6335F996:8ECB55D9FFACC579FF57FB8967B2FB86" box="[128,230,1085,1109]" county="Burqin County" municipality="Suosuoquan Formation" name="Miocene" pageId="12" pageNumber="13" stateProvince="Xinjiang Uygur">Miocene</location>
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</materialsCitation>
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.
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</paragraph>
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</subSubSection>
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<subSubSection id="C30E5089FFACC579FF4DFBEE668CFAF1" pageId="12" pageNumber="13" type="etymology">
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<paragraph id="8BAB0302FFACC579FF4DFBEE65DAFB7E" blockId="12.[128,654,762,1754]" pageId="12" pageNumber="13">
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ETYMOLOGY: The species name,
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<taxonomicName id="4C147881FFACC579FDCDFBEF6539FBA0" authorityName="Bi & Meng & Wu & Ye & Ni" authorityYear="2009" box="[538,621,1115,1139]" class="Mammalia" family="Ctenodactylidae" genus="Prodistylomys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="12" pageNumber="13" phylum="Chordata" rank="species" species="wangae">
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<emphasis id="B960DF10FFACC579FDCDFBEF6539FBA0" box="[538,621,1115,1139]" italics="true" pageId="12" pageNumber="13">wangae</emphasis>
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</taxonomicName>
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, is in honor of our colleague, Wang Banyue, for her contribution to the study of distylomyids.
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</paragraph>
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<paragraph id="8BAB0302FFACC579FF4DFB07668CFAF1" blockId="12.[128,654,762,1754]" pageId="12" pageNumber="13">
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||
<materialsCitation id="3B7C095FFFACC579FF4DFB076680FAF1" ID-GBIF-Occurrence="3400176302" location="Chinese Academy of Sciences" municipality="Institute of Vertebrate Paleontology" pageId="12" pageNumber="13" specimenCount="1" stateProvince="Beijing">
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REPOSITORY: The specimens are stored in the collections of the
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<collectingMunicipality id="6BCF9978FFACC579FE51FB646642FAD6" pageId="12" pageNumber="13">Institute of Vertebrate Paleontology</collectingMunicipality>
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and Paleoanthropology,
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<location id="8ECB55D9FFACC579FDE3FB596621FAF1" LSID="urn:lsid:plazi:treatment:03BDB214FFACC579FF35FD2D6335F996:8ECB55D9FFACC579FDE3FB596621FAF1" municipality="Institute of Vertebrate Paleontology" name="Chinese Academy of Sciences" pageId="12" pageNumber="13" stateProvince="Beijing">Chinese Academy of Sciences</location>
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,
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<collectingRegion id="49D0CDE0FFACC579FE56FABE6680FAF1" box="[385,468,1290,1314]" country="China" name="Beijing" pageId="12" pageNumber="13">Beijing</collectingRegion>
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</materialsCitation>
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.
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||
</paragraph>
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||
</subSubSection>
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||
<subSubSection id="C30E5089FFACC579FF4DFA9C6535FA3C" pageId="12" pageNumber="13" type="diagnosis">
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<paragraph id="8BAB0302FFACC579FF4DFA9C6535FA3C" blockId="12.[128,654,762,1754]" pageId="12" pageNumber="13">
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DIAGNOSIS: Slightly larger than
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<taxonomicName id="4C147881FFACC579FDDDFA9D656AFA92" authorityName="Bi & Meng & Wu & Ye & Ni" authorityYear="2009" box="[522,574,1321,1345]" class="Mammalia" family="Ctenodactylidae" genus="Prodistylomys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="12" pageNumber="13" phylum="Chordata" rank="species" species="lii">
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<emphasis id="B960DF10FFACC579FDDDFA9D656AFA92" box="[522,574,1321,1345]" italics="true" pageId="12" pageNumber="13">P. lii</emphasis>
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</taxonomicName>
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and
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<taxonomicName id="4C147881FFACC579FDA2FA9D665FFA8D" authorityName="Wang and Qi" authorityYear="1989" class="Mammalia" family="Ctenodactylidae" genus="Prodistylomys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="12" pageNumber="13" phylum="Chordata" rank="species" species="xinjiangensis">
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<emphasis id="B960DF10FFACC579FDA2FA9D665FFA8D" italics="true" pageId="12" pageNumber="13">P. xinjiangensis</emphasis>
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</taxonomicName>
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. Differs from
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<taxonomicName id="4C147881FFACC579FE7DFAF2668AFA8D" authorityName="Bi & Meng & Wu & Ye & Ni" authorityYear="2009" box="[426,478,1350,1374]" class="Mammalia" family="Ctenodactylidae" genus="Prodistylomys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="12" pageNumber="13" phylum="Chordata" rank="species" species="lii">
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<emphasis id="B960DF10FFACC579FE7DFAF2668AFA8D" box="[426,478,1350,1374]" italics="true" pageId="12" pageNumber="13">P. lii</emphasis>
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</taxonomicName>
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in having weak roots, thicker cement, rounded lingual apex of m1 trigonid, shorter talonid on m2. Differs from
|
||
<taxonomicName id="4C147881FFACC579FF69FA29663EFA66" authorityName="Wang and Qi" authorityYear="1989" box="[190,362,1437,1461]" class="Mammalia" family="Ctenodactylidae" genus="Prodistylomys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="12" pageNumber="13" phylum="Chordata" rank="species" species="xinjiangensis">
|
||
<emphasis id="B960DF10FFACC579FF69FA29663EFA66" box="[190,362,1437,1461]" italics="true" pageId="12" pageNumber="13">P. xinjiangensis</emphasis>
|
||
</taxonomicName>
|
||
in having thicker cement, rounded lingual apex of m1 trigonid, and the absence of the metaflexid on lower molars.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="C30E5089FFACC579FF4DFA416398FB33" pageId="12" pageNumber="13" type="description">
|
||
<paragraph id="8BAB0302FFACC579FF4DFA4163DFFE97" blockId="12.[128,654,762,1754]" lastBlockId="12.[701,1228,211,1605]" pageId="12" pageNumber="13">
|
||
DESCRIPTION: The M3 trigon is semicircular in outline, with a straight posterior margin (fig. 8A). The enamel is very thick, becoming thinner on the posterior margin. The hypoflexus extends to the base of the crown and becomes shallower while approaching the base. The mesoflexus extends
|
||
<emphasis id="B960DF10FFACC579FE0FF91366A7F96F" bold="true" box="[472,499,1703,1724]" pageId="12" pageNumber="13">L</emphasis>
|
||
of the height of the crown and is fused toward the base, suggesting a rudimentary root. On the contrary, in
|
||
<taxonomicName id="4C147881FFACC579FCF4FF45640FFEDA" authorityName="Bi & Meng & Wu & Ye & Ni" authorityYear="2009" box="[803,859,241,265]" class="Mammalia" family="Ctenodactylidae" genus="Prodistylomys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="12" pageNumber="13" phylum="Chordata" rank="species" species="lii">
|
||
<emphasis id="B960DF10FFACC579FCF4FF45640FFEDA" box="[803,859,241,265]" italics="true" pageId="12" pageNumber="13">P. lii</emphasis>
|
||
</taxonomicName>
|
||
, both flexi are fused, showing a well-developed root. The talon is circular shaped, much narrower than the trigon.
|
||
</paragraph>
|
||
<paragraph id="8BAB0302FFACC579FD0FFEFE63C5FDE1" blockId="12.[701,1228,211,1605]" pageId="12" pageNumber="13">
|
||
The state of the masseteric crest is typical for the genus; the ventral crest is strong and extends under p4 and the dorsal crest is absent. The lower incisor extends posteriorly to underneath m3. The lower incisor is similar in its general morphology and microstructure to that of
|
||
<taxonomicName id="4C147881FFACC579FD6AFE496495FDC6" authorityName="Bi & Meng & Wu & Ye & Ni" authorityYear="2009" box="[701,961,509,533]" class="Mammalia" family="Ctenodactylidae" genus="Distylomys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="12" pageNumber="13" phylum="Chordata" rank="species" species="burqinensis">
|
||
<emphasis id="B960DF10FFACC579FD6AFE496495FDC6" box="[701,961,509,533]" italics="true" pageId="12" pageNumber="13">Distylomys burqinensis</emphasis>
|
||
</taxonomicName>
|
||
except that the pulp cavity is significantly smaller (fig. 5A, D).
|
||
</paragraph>
|
||
<paragraph id="8BAB0302FFACC579FD0FFD8D6351FCF2" blockId="12.[701,1228,211,1605]" pageId="12" pageNumber="13">
|
||
The p4 is shorter than m1 (fig. 8C). The trigonid is much narrower than the talonid compared with that in
|
||
<taxonomicName id="4C147881FFACC579FC6FFDC164BFFD5E" authorityName="Bi & Meng & Wu & Ye & Ni" authorityYear="2009" box="[952,1003,629,653]" class="Mammalia" family="Ctenodactylidae" genus="Prodistylomys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="12" pageNumber="13" phylum="Chordata" rank="species" species="lii">
|
||
<emphasis id="B960DF10FFACC579FC6FFDC164BFFD5E" box="[952,1003,629,653]" italics="true" pageId="12" pageNumber="13">P. lii</emphasis>
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName id="4C147881FFACC579FBF5FDC1639FFD5E" authorityName="Wang and Qi" authorityYear="1989" box="[1058,1227,629,653]" class="Mammalia" family="Ctenodactylidae" genus="Prodistylomys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="12" pageNumber="13" phylum="Chordata" rank="species" species="xinjiangensis">
|
||
<emphasis id="B960DF10FFACC579FBF5FDC1639FFD5E" box="[1058,1227,629,653]" italics="true" pageId="12" pageNumber="13">P. xinjiangensis</emphasis>
|
||
</taxonomicName>
|
||
and has a stout anterolophid. The anterolophid is blunt and lies well toward the labial side of the tooth rather than in the center. Only thin cement is present in the flexids. The talonid has a vestigial posterolophid.
|
||
</paragraph>
|
||
<paragraph id="8BAB0302FFACC579FD0FFC936398FB33" blockId="12.[701,1228,211,1605]" pageId="12" pageNumber="13">
|
||
Only m1 and m2 are preserved (fig. 8C;
|
||
<tableCitation id="C69636B9FFACC579FD6AFCF1645CFC8E" box="[701,776,837,861]" captionStart="TABLE 1" captionStartId="8.[817,890,567,586]" captionTargetBox="[88,1617,680,1371]" captionText="TABLE 1 Tooth measurements (number of specimens, mean, range, and standard deviation; in mm) of D. burqinensis, P. lii and P. wangae. L, length; W, width; AW, width of the trigon(id); PW, the width of the talon(id)" httpUri="http://table.plazi.org/id/DF6B538AFFA8C57DFCE6FD836339FD53" pageId="12" pageNumber="13" tableUuid="DF6B538AFFA8C57DFCE6FD836339FD53">table 1</tableCitation>
|
||
). The lower molars are bilophodont, and hypsodont. The crown expands toward the base. The trigonid is subelliptical with a rounded anterior wall and a long axis oriented slightly anterolabial-posterolingually. The flexids are Ushaped with thin cement; the mesoflexid shallows but extends all the way to the base, and the hypoflexid extends down 2/3 of the height of the crown where it closes, indicating a rudimentary root (fig. 8B). The talonid is narrower than the trigonid, and is compressed with acute labial and lingual angles. The m1 and m2 are identical in crown morphology, but m2 is shorter than m1, and the lingual apex of its trigonid is more acute.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="C30E5089FFACC579FD0FFB526335F996" pageId="12" pageNumber="13" type="discussion">
|
||
<paragraph id="8BAB0302FFACC579FD0FFB526335F996" blockId="12.[701,1228,211,1605]" pageId="12" pageNumber="13">
|
||
COMMENT: Although the
|
||
<collectingRegion id="49D0CDE0FFACC579FBCEFB52632DFB2D" box="[1049,1145,1254,1278]" country="China" name="Xinjiang Uygur" pageId="12" pageNumber="13">Xinjiang</collectingRegion>
|
||
specimens are very similar to
|
||
<taxonomicName id="4C147881FFACC579FC36FAB06308FACF" authorityName="Wang" authorityYear="1988" box="[993,1116,1284,1308]" class="Mammalia" family="Ctenodactylidae" genus="Distylomys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="12" pageNumber="13" phylum="Chordata" rank="genus">
|
||
<emphasis id="B960DF10FFACC579FC36FAB06308FACF" box="[993,1116,1284,1308]" italics="true" pageId="12" pageNumber="13">Distylomys</emphasis>
|
||
</taxonomicName>
|
||
in crown morphology, the rudimentary roots of the cheek teeth, shorter trigonid and narrower talonid on lower molars, and thinner cement suggest that it is better to assign the specimens to the genus
|
||
<taxonomicName id="4C147881FFACC579FD6AFA2D640DFA62" authorityName="Wang and Qi" authorityYear="1989" box="[701,857,1433,1457]" class="Mammalia" family="Ctenodactylidae" genus="Prodistylomys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="12" pageNumber="13" phylum="Chordata" rank="genus">
|
||
<emphasis id="B960DF10FFACC579FD6AFA2D640DFA62" box="[701,857,1433,1457]" italics="true" pageId="12" pageNumber="13">Prodistylomys</emphasis>
|
||
</taxonomicName>
|
||
rather than to
|
||
<taxonomicName id="4C147881FFACC579FBF5FA2D63C8FA62" authorityName="Wang" authorityYear="1988" box="[1058,1180,1433,1457]" class="Mammalia" family="Ctenodactylidae" genus="Distylomys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="12" pageNumber="13" phylum="Chordata" rank="genus">
|
||
<emphasis id="B960DF10FFACC579FBF5FA2D63C8FA62" box="[1058,1180,1433,1457]" italics="true" pageId="12" pageNumber="13">Distylomys</emphasis>
|
||
</taxonomicName>
|
||
.
|
||
<taxonomicName id="4C147881FFACC579FB64FA2D645BFA1D" authorityName="Bi & Meng & Wu & Ye & Ni" authorityYear="2009" class="Mammalia" family="Ctenodactylidae" genus="Prodistylomys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="12" pageNumber="13" phylum="Chordata" rank="species" species="wangae">
|
||
<emphasis id="B960DF10FFACC579FB64FA2D645BFA1D" italics="true" pageId="12" pageNumber="13">P. wangae</emphasis>
|
||
</taxonomicName>
|
||
differs substantially from
|
||
<taxonomicName id="4C147881FFACC579FBB4FA0263F7FA1D" authorityName="Bi & Meng & Wu & Ye & Ni" authorityYear="2009" box="[1123,1187,1462,1486]" class="Mammalia" family="Ctenodactylidae" genus="Prodistylomys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="12" pageNumber="13" phylum="Chordata" rank="species" species="lii">
|
||
<emphasis id="B960DF10FFACC579FBB4FA0263F7FA1D" box="[1123,1187,1462,1486]" italics="true" pageId="12" pageNumber="13">P. lii</emphasis>
|
||
</taxonomicName>
|
||
in showing a tendency to the loss of roots and subelliptical trigonid. It differs from
|
||
<taxonomicName id="4C147881FFACC579FB8FFA4665AAF9FB" authorityName="Wang and Qi" authorityYear="1989" class="Mammalia" family="Ctenodactylidae" genus="Prodistylomys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="12" pageNumber="13" phylum="Chordata" rank="species" species="xinjiangensis">
|
||
<emphasis id="B960DF10FFACC579FB8FFA4665AAF9FB" italics="true" pageId="12" pageNumber="13">P. xinjiangensis</emphasis>
|
||
</taxonomicName>
|
||
in the absence of the posterolophid (or metaflexid) and subelliptical trigonid.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |