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124 lines
16 KiB
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<document id="CA6BD071599480EC6972C7419E75D9F9" ID-DOI="10.5281/zenodo.13345798" ID-ISSN="1732-2421" ID-Zenodo-Dep="13345798" IM.bibliography_approvedBy="felipe" IM.illustrations_approvedBy="felipe" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="karina" IM.tables_approvedBy="karina" IM.taxonomicNames_approvedBy="felipe" IM.treatments_approvedBy="karina" checkinTime="1723061803200" checkinUser="felipe" docAuthor="Rana, Rajendra S. & Wilson, Gregory P." docDate="2003" docId="03AD87BEA163FFADA25B0CB0FC52A487" docLanguage="en" docName="ActaPalaeontolPol.48.3.331-348.pdf" docOrigin="Acta Palaeontologica Polonica 48 (3)" docStyle="DocumentStyle:93F5927C23D90727DE855278A6F17B37.1:ActaPalaeontolPol.2002-2009.journal_article" docStyleId="93F5927C23D90727DE855278A6F17B37" docStyleName="ActaPalaeontolPol.2002-2009.journal_article" docStyleVersion="1" docTitle="Deccanolestes robustus Prasad, Jaeger, Sahni, Gheerbrant, and Khajuria 1994" docType="treatment" docVersion="4" lastPageNumber="337" masterDocId="FF94FFC6A165FFABA23D085CFF8AA275" masterDocTitle="New Late Cretaceous mammals from the Intertrappean beds of Rangapur, India and paleobiogeographic framework" masterLastPageNumber="348" masterPageNumber="331" pageNumber="337" updateTime="1724110733098" updateUser="ExternalLinkService" zenodo-license-document="CC-BY-4.0">
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<mods:title id="64D22C1290C2DC4090B1CA5B1CA71098">New Late Cretaceous mammals from the Intertrappean beds of Rangapur, India and paleobiogeographic framework</mods:title>
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<mods:namePart id="C97856010C5B819B72EE9F081815174B">Rana, Rajendra S.</mods:namePart>
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<mods:namePart id="4E151AEB7B9A5F5BED7D438F720A38B1">Wilson, Gregory P.</mods:namePart>
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<mods:title id="D70E45E03D159F97702FC2DDAA0454FA">Acta Palaeontologica Polonica</mods:title>
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<mods:part id="B15287C0969A8B8FC76BE3DDB676C8C7">
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<mods:date id="40195DCCFB6C0B9B3EA45F9248E41DDB">2003</mods:date>
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<mods:number id="1217D97D032E2C565F96B7B4C6DA339D">2003-09-30</mods:number>
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<mods:number id="4BE80F307F7C86E37A9097E8501D0E51">48</mods:number>
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<mods:identifier id="20581A97FB82313B05A9EF4F452B1670" type="DOI">10.5281/zenodo.13345798</mods:identifier>
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<mods:identifier id="539B3792822211D267C8B324766F37F2" type="ISSN">1732-2421</mods:identifier>
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<treatment id="03AD87BEA163FFADA25B0CB0FC52A487" ID-DOI="http://doi.org/10.5281/zenodo.13327123" ID-Zenodo-Dep="13327123" LSID="urn:lsid:plazi:treatment:03AD87BEA163FFADA25B0CB0FC52A487" httpUri="http://treatment.plazi.org/id/03AD87BEA163FFADA25B0CB0FC52A487" lastPageNumber="337" pageId="6" pageNumber="337">
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<subSubSection id="C31E6523A163FFADA25B0CB0FF73A73B" pageId="6" pageNumber="337" type="nomenclature">
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<paragraph id="8BBB36A8A163FFADA25B0CB0FE71A758" blockId="6.[102,733,1260,1358]" pageId="6" pageNumber="337">
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<heading id="D0F381C4A163FFADA25B0CB0FE71A758" fontSize="12" level="2" pageId="6" pageNumber="337" reason="9">
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<taxonomicName id="4C044D2BA163FFADA25B0CB0FE71A758" authority="Prasad, Jaeger, Sahni, Gheerbrant, and Khajuria, 1994" authorityName="Prasad, Jaeger, Sahni, Gheerbrant, and Khajuria" authorityYear="1994" class="Mammalia" family="Adapisoriculidae" genus="Deccanolestes" higherTaxonomySource="GBIF" isUncertain="true" kingdom="Animalia" order="Carnivora" pageId="6" pageNumber="337" phylum="Chordata" rank="species" species="robustus">
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<emphasis id="B970EABAA163FFADA25B0CB0FE95A77C" box="[102,287,1260,1289]" italics="true" pageId="6" pageNumber="337">Deccanolestes</emphasis>
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cf.
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<emphasis id="B970EABAA163FFADA3720CB0FE37A77C" box="[335,445,1260,1289]" italics="true" pageId="6" pageNumber="337">robustus</emphasis>
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<bibRefCitation id="EF954B59A163FFADA3FB0CB0FE71A758" author="Prasad, G. V. R. & Jaeger, J. J. & Sahni, A. & Gheerbrant, E. & Khajuria, C. K." pageId="6" pageNumber="337" pagination="260 - 277" refId="ref16988" refString="Prasad, G. V. R., Jaeger, J. J., Sahni, A., Gheerbrant, E., and Khajuria, C. K. 1994. Eutherian mammals from the Upper Cretaceous (Maastrichtian) Intertrappean Beds of Naskal, Andhra Pradesh, India. Journal of Vertebrate Paleontology 14: 260 - 277." type="journal article" year="1994">Prasad, Jaeger, Sahni, Gheerbrant, and Khajuria, 1994</bibRefCitation>
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</taxonomicName>
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||
</heading>
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||
</paragraph>
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<paragraph id="8BBB36A8A163FFADA25B0D64FF73A73B" blockId="6.[102,733,1260,1358]" box="[102,249,1336,1358]" pageId="6" pageNumber="337">
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<tableCitation id="C6860313A163FFADA25B0D64FF3AA73B" box="[102,176,1336,1358]" captionStart="Table 2" captionStartId="5.[102,157,1298,1320]" captionText="Table 2. Measurements (in mm) and ratios of Rangapur and Naskal lower molars. Abbreviations as follows:L, length; TRW, trigonid width; TAW, talonid width; PHL, posthypocristid length; PEL, postentocristid length; PDH, protoconid height; MDH, metaconid height; AML, premetaconid length; TAH, talonid height; TAL, talonid length. Naskal data from Prasad et al. (1994)." pageId="6" pageNumber="337">Table 2</tableCitation>
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,
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<figureCitation id="133F2A2DA163FFADA2870D64FF7EA73B" box="[186,244,1336,1358]" captionStart="Fig" captionStartId="6.[102,135,655,674]" captionTargetBox="[102,1485,227,627]" captionTargetId="figure-717@6.[102,1485,227,627]" captionTargetPageId="6" captionText="Fig. 4. Deccanolestes cf. robustus. Right m1 or m2 (ITV/R/Mm−6) in occlusal (A, B), lingual (C), and labial (D) views. Scale bar 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13345802" httpUri="https://zenodo.org/record/13345802/files/figure.png" pageId="6" pageNumber="337">Fig. 4</figureCitation>
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.
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</paragraph>
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</subSubSection>
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<subSubSection id="C31E6523A163FFADA25B0D3DFC52A487" pageId="6" pageNumber="337" type="materials_examined">
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<paragraph id="8BBB36A8A163FFADA25B0D3DFDB5A70C" blockId="6.[102,575,1377,1401]" box="[102,575,1377,1401]" pageId="6" pageNumber="337">
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<emphasis id="B970EABAA163FFADA25B0D3DFF42A70C" box="[102,200,1377,1401]" italics="true" pageId="6" pageNumber="337">Material</emphasis>
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.—ITV/
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<collectionCode id="ED15AE6DA163FFADA3230D3DFEBAA70C" box="[286,304,1377,1401]" country="Chile" name="Departamento de Geologia, Universidad de Chile" pageId="6" pageNumber="337">R</collectionCode>
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/Mm−6, right m1 or m2.
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</paragraph>
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<paragraph id="8BBB36A8A163FFADA25B0DD5FD3CA7B4" blockId="6.[102,774,1417,1474]" pageId="6" pageNumber="337">
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<emphasis id="B970EABAA163FFADA25B0DD5FF61A7D4" box="[102,235,1417,1441]" italics="true" pageId="6" pageNumber="337">Distribution</emphasis>
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.—Late Cretaceous (Maastrichtian) Intertrappean beds of Naskal and Rangapur,
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<collectingRegion id="49C0F84AA163FFADA3850DF5FDE6A7B4" box="[440,620,1449,1473]" country="India" name="Andhra Pradesh" pageId="6" pageNumber="337">Andhra Pradesh</collectingRegion>
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,
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<collectingCountry id="F3137638A163FFADA04B0DF5FD38A7B4" box="[630,690,1449,1473]" name="India" pageId="6" pageNumber="337">India</collectingCountry>
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.
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</paragraph>
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<paragraph id="8BBB36A8A163FFADA25B0D8EFB3BA13C" blockId="6.[102,775,1490,2026]" lastBlockId="6.[812,1485,721,1417]" pageId="6" pageNumber="337">
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<emphasis id="B970EABAA163FFADA25B0D8EFF6DA79C" box="[102,231,1490,1513]" italics="true" pageId="6" pageNumber="337">Description</emphasis>
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.—ITV/
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<collectionCode id="ED15AE6DA163FFADA3060D8EFEC7A79F" box="[315,333,1490,1514]" country="Chile" name="Departamento de Geologia, Universidad de Chile" pageId="6" pageNumber="337">R</collectionCode>
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/Mm−6 is identified as a right lower molar, either m1 or m2. The roots are missing and a small portion of the lingual base of the crown is eroded. The crown is much larger than the other Rangapur specimens (
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<tableCitation id="C6860313A163FFADA05E0E6EFD4BA43F" box="[611,705,1586,1610]" captionStart="Table 2" captionStartId="5.[102,157,1298,1320]" captionText="Table 2. Measurements (in mm) and ratios of Rangapur and Naskal lower molars. Abbreviations as follows:L, length; TRW, trigonid width; TAW, talonid width; PHL, posthypocristid length; PEL, postentocristid length; PDH, protoconid height; MDH, metaconid height; AML, premetaconid length; TAH, talonid height; TAL, talonid length. Naskal data from Prasad et al. (1994)." pageId="6" pageNumber="337">Table 2</tableCitation>
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). The trigonid is just wider than and over one−and−a−half times taller than the talonid. Cusps on the trigonid are well spaced and somewhat inflated. The protoconid is the tallest cusp, but only slightly taller than the metaconid. The paraconid is small, labial, and slightly anteriorly projecting but not crest−like. The metaconid is more distally positioned than the protoconid, and its apex is somewhat lingually deflected. The protoconid is connected to the metaconid by a high protocristid, and to the paraconid by a very low paracristid. A broad notch separates the metaconid and paraconid. The anterolabial face of trigonid is slightly worn but preserves a faint anterior labial cingulid. It runs subvertically from the base of the crown below the protoconid, anterolingually toward the paraconid. It terminates below the notch formed by the paracristid. An anterior lingual cuspule is absent but the inflated base of the paraconid may have served the same function. In labial view, the trigonid appears tipped anteriorly (
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<figureCitation id="133F2A2DA163FFADA6710B6DFB2EA13C" box="[1100,1188,817,841]" captionStart="Fig" captionStartId="6.[102,135,655,674]" captionTargetBox="[102,1485,227,627]" captionTargetId="figure-717@6.[102,1485,227,627]" captionTargetPageId="6" captionText="Fig. 4. Deccanolestes cf. robustus. Right m1 or m2 (ITV/R/Mm−6) in occlusal (A, B), lingual (C), and labial (D) views. Scale bar 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13345802" httpUri="https://zenodo.org/record/13345802/files/figure.png" pageId="6" pageNumber="337">Fig. 4D</figureCitation>
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).
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</paragraph>
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<paragraph id="8BBB36A8A163FFADA16F0B0EFBF2A7FC" blockId="6.[812,1485,721,1417]" pageId="6" pageNumber="337">
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In occlusal view, the posterior face of the trigonid contacts the talonid at an oblique angle (
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<figureCitation id="133F2A2DA163FFADA6FF0B2DFAB3A1FC" box="[1218,1337,881,905]" captionStart="Fig" captionStartId="6.[102,135,655,674]" captionTargetBox="[102,1485,227,627]" captionTargetId="figure-717@6.[102,1485,227,627]" captionTargetPageId="6" captionText="Fig. 4. Deccanolestes cf. robustus. Right m1 or m2 (ITV/R/Mm−6) in occlusal (A, B), lingual (C), and labial (D) views. Scale bar 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.13345802" httpUri="https://zenodo.org/record/13345802/files/figure.png" pageId="6" pageNumber="337">Fig. 4A, B</figureCitation>
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). The talonid basin is wide but not very deep. It slopes downward in an anterolingual direction and is only weakly closed by a low entocristid on the lingual side. The talonid notch is deep. On the labial side, the cristid obliqua is higher than the entocristid and contacts the base of the trigonid just lingual to the protocristid notch below the base of the metaconid. A faint trace of a distal metacristid is present. The acute angle between the cristid obliqua and the posterior face of the trigonid forms a well−excavated hypoflexid. The hypoconid is more anterior than the entoconid and is labially shifted. The hypoconulid is closer to the entoconid than it is to the hypoconid. The hypoconid is the tallest of the talonid cusps, followed by the hypoconulid, and then the entoconid. In posterior view, the talonid is canted lingually with respect to the trigonid, and the labial margins of the talonid and protoconid are convex. A postcingulid is absent.
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</paragraph>
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<paragraph id="8BBB36A8A163FFADA1110DC7FC52A487" blockId="6.[812,1486,1434,1778]" pageId="6" pageNumber="337">
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<emphasis id="B970EABAA163FFADA1110DC7FC2DA7C7" box="[812,935,1435,1458]" italics="true" pageId="6" pageNumber="337">Discussion</emphasis>
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.—In most respects, ITV/
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<collectionCode id="ED15AE6DA163FFADA6FE0DC6FB5FA7C7" box="[1219,1237,1434,1458]" country="Chile" name="Departamento de Geologia, Universidad de Chile" pageId="6" pageNumber="337">R</collectionCode>
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/Mm−6 is very similar to the only known lower molar of
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<taxonomicName id="4C044D2BA163FFADA6F00DE7FADEA7A7" authorityName="Prasad, Jaeger, Sahni, Gheerbrant, and Khajuria" authorityYear="1994" box="[1229,1364,1466,1490]" class="Mammalia" family="Adapisoriculidae" genus="Deccanolestes" higherTaxonomySource="GBIF" kingdom="Animalia" order="Carnivora" pageId="6" pageNumber="337" phylum="Chordata" rank="species" species="robustus">
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<emphasis id="B970EABAA163FFADA6F00DE7FADEA7A7" box="[1229,1364,1466,1490]" italics="true" pageId="6" pageNumber="337">D. robustus</emphasis>
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</taxonomicName>
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(
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<collectionCode id="ED15AE6DA163FFADA75A0DE6FA17A7A7" box="[1383,1437,1466,1490]" country="USA" httpUri="http://grbio.org/cool/xxmh-b3dj" name="Vertebrate Paleontology Laboratory" pageId="6" pageNumber="337" type="Museum">VPL</collectionCode>
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/JU/
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<collectionCode id="ED15AE6DA163FFADA1110D86FCF0A787" box="[812,890,1498,1522]" pageId="6" pageNumber="337">NKIM</collectionCode>
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/14, m1). It differs from the latter in both size and in the arrangement of the talonid cusps. ITV/
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<collectionCode id="ED15AE6DA163FFADA7370DA6FA96A467" box="[1290,1308,1530,1554]" country="Chile" name="Departamento de Geologia, Universidad de Chile" pageId="6" pageNumber="337">R</collectionCode>
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/Mm−6 is about 24% larger than
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<collectionCode id="ED15AE6DA163FFADA1D30E46FBAEA447" box="[1006,1060,1562,1586]" country="USA" httpUri="http://grbio.org/cool/xxmh-b3dj" name="Vertebrate Paleontology Laboratory" pageId="6" pageNumber="337" type="Museum">VPL</collectionCode>
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/JU/
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<collectionCode id="ED15AE6DA163FFADA6690E46FB15A447" box="[1108,1183,1562,1586]" pageId="6" pageNumber="337">NKIM</collectionCode>
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/14 and has a hypoconulid that is closer to the entoconid than it is to the hypoconid (
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<collectionCode id="ED15AE6DA163FFADA1090E06FCE0A407" box="[820,874,1626,1650]" country="USA" httpUri="http://grbio.org/cool/xxmh-b3dj" name="Vertebrate Paleontology Laboratory" pageId="6" pageNumber="337" type="Museum">VPL</collectionCode>
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/JU/
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<collectionCode id="ED15AE6DA163FFADA1A70E06FC6CA407" box="[922,998,1626,1650]" pageId="6" pageNumber="337">NKIM</collectionCode>
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/14 has the reverse arrangement). These differences may be due to preservational, intraspecific, or interspecific variation. Because sample sizes are still very small, we tentatively refer this specimen to
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<taxonomicName id="4C044D2BA163FFADA6F70EE7FAC7A4A7" authorityName="Prasad, Jaeger, Sahni, Gheerbrant, and Khajuria" authorityYear="1994" box="[1226,1357,1722,1746]" class="Mammalia" family="Adapisoriculidae" genus="Deccanolestes" higherTaxonomySource="GBIF" kingdom="Animalia" order="Carnivora" pageId="6" pageNumber="337" phylum="Chordata" rank="species" species="robustus">
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<emphasis id="B970EABAA163FFADA6F70EE7FAC7A4A7" box="[1226,1357,1722,1746]" italics="true" pageId="6" pageNumber="337">D. robustus</emphasis>
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</taxonomicName>
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rather than to a new taxon.
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</paragraph>
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</subSubSection>
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</treatment>
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</document> |