236 lines
26 KiB
XML
236 lines
26 KiB
XML
<document id="FFA2ED9CBD289220057FFF5CD0F31458" ID-DOI="10.3897/fr.27.e115693" ID-ZooBank="4886C6AC-2F7E-4C8D-B0E9-5A361EF622DB" ID-publisher-id="115693" URI-arpha="C765BE24-0BFF-54AD-B9B9-7626C3A8B7E1" URI-zoobank="http://zoobank.org/4886C6AC-2F7E-4C8D-B0E9-5A361EF622DB" article-type="research-article" checkinTime="1716308245355" checkinUser="pensoft" docAuthor="Pang, Li-bo, Chen, Shao-kun, Hu, Xin, Wu, Yan & Wei, Guang-biao" docDate="2024" docId="0C0A10DB757F55D180CAE1D91267B49C" docLanguage="en" docName="Fossil Record 27(1): 209-219" docOrigin="Fossil Record 27 (1)" docSource="https://fr.pensoft.net/article/115693/download/xml/" docStyle="DocumentStyle:PensoftTaxPub.0000.journal_article.generic" docStyleName="PensoftTaxPub.0000.journal_article.generic" docTitle="Aeretes melanopterus" docType="treatment" docVersion="2" dtd-version="3.0" lastPageNumber="219" masterDocId="C765BE240BFF54ADB9B97626C3A8B7E1" masterDocTitle="Fossil flying squirrels (Petauristinae, Sciuridae, Rodentia) from the Yumidong Cave in Wushan County, Chongqing, China" masterLastPageNumber="219" masterPageNumber="209" pageNumber="209" updateTime="1716308626979" updateUser="ExternalLinkService">
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<mods:titleInfo id="C62CD224940919C0DD8DBFFE31987F43">
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<mods:title id="FB1EF5038E90039DD7F76E81A87E9421">Fossil flying squirrels (Petauristinae, Sciuridae, Rodentia) from the Yumidong Cave in Wushan County, Chongqing, China</mods:title>
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<mods:name id="52976CE1047EFD85A24F7A9C694F7E6D" type="personal">
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<mods:roleTerm id="4E62B362F786D6DF1F7B63A9710063D0">Author</mods:roleTerm>
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</mods:role>
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<mods:namePart id="86CD93581F12FEC7448F511C61A0C1F1">Pang, Li-bo</mods:namePart>
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<mods:affiliation id="4B88D11EB7AF2FA6AF0EEA9C35564596">Hebei International Joint Research Center for Paleoanthropology, College of Earth Sciences, Hebei GEO University, Shijiazhuang 050031, Hebei, China</mods:affiliation>
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</mods:name>
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<mods:name id="140CE5FE9647E4999114EF8BA193C3A8" type="personal">
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<mods:roleTerm id="31E8AE1A271485BD0CEFD8D49BB58945">Author</mods:roleTerm>
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</mods:role>
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<mods:namePart id="6A23B2EB8AA0827D71170E78B333F5F4">Chen, Shao-kun</mods:namePart>
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<mods:affiliation id="7C67A40DFC6DBC3C577003F2E8E10F2C">Hebei International Joint Research Center for Paleoanthropology, College of Earth Sciences, Hebei GEO University, Shijiazhuang 050031, Hebei, China</mods:affiliation>
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</mods:name>
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<mods:name id="1EA1556F9AE59AFBD0925A5CD8B37617" type="personal">
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<mods:roleTerm id="4C501E016CB66E094788B4860F901D4C">Author</mods:roleTerm>
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</mods:role>
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<mods:namePart id="7B426DEB1041EB2C3A949FE553E40E85">Hu, Xin</mods:namePart>
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<mods:affiliation id="7379375D39531D14D41A75BF87768FC1">China Three Gorges Museum, Chongqing 400015, China</mods:affiliation>
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</mods:name>
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<mods:name id="FB105A9510DE8C8C7B480BC9D02A75FB" type="personal">
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</mods:role>
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<mods:namePart id="80AE60A568BC4A6C44404F216F35C6FC">Wu, Yan</mods:namePart>
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<mods:affiliation id="EB3D53F9423CB67D99855FC2960EFD84">China Three Gorges Museum, Chongqing 400015, China</mods:affiliation>
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<mods:roleTerm id="3C4F7C9271C856B66E5569272EE58DBD">Author</mods:roleTerm>
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</mods:role>
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<mods:namePart id="776A2CE08CB403CF8DAB3650A99E7885">Wei, Guang-biao</mods:namePart>
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<mods:affiliation id="7E12EDA25A2C2BA165336486FF549FA9">Chongqing Institute of Geological Survey, Chongqing 401122, China</mods:affiliation>
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<mods:typeOfResource id="22867B56C89E0C055529DC9E9FF17215">text</mods:typeOfResource>
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<mods:titleInfo id="E9EF28270445824ABB52453CF2FD7FEB">
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<mods:title id="384D3F12766FA310EB878CC2183E219F">Fossil Record</mods:title>
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</mods:titleInfo>
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<mods:part id="21D77004BE1D0B532D5121D059D43703">
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<mods:date id="8E830E3EB4F768A322376745606D4E53">2024</mods:date>
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<mods:number id="2925FEAB0ED1BC273E23DAC7B06C7A25">2024-05-21</mods:number>
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<mods:detail id="BB397A83A635CB6334651F92DBB63780" type="volume">
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<mods:number id="99E33ABB00628C3DEA6D69F875F808F7">27</mods:number>
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<mods:detail id="0891DF297854A14DC1507F3E31E5387E" type="issue">
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<mods:number id="551C494619593365A9073130031E3CE3">1</mods:number>
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<mods:extent id="57F5FD568207AC294A19AF07D664BDED" unit="page">
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<mods:start id="171FFE9AE7F61D990C75D20AD610F1E0">209</mods:start>
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<mods:end id="388ACBA817A76568C483FB5514002061">219</mods:end>
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<mods:classification id="5356E2508167476B26BFBE21BB49C724">journal article</mods:classification>
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<mods:identifier id="BAFAFCA6011B2E812156C06F1D4F54DB" type="DOI">10.3897/fr.27.e115693</mods:identifier>
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<mods:identifier id="12730B1C1430FFA7E2A2F1FA070CAF53" type="ZooBank">4886C6AC-2F7E-4C8D-B0E9-5A361EF622DB</mods:identifier>
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<treatment id="0C0A10DB757F55D180CAE1D91267B49C" ID-DOI="http://doi.org/10.5281/zenodo.11236934" ID-Zenodo-Dep="11236934" ID-arpha="0C0A10DB-757F-55D1-80CA-E1D91267B49C" LSID="urn:lsid:plazi:treatment:0C0A10DB757F55D180CAE1D91267B49C" httpUri="http://treatment.plazi.org/id/0C0A10DB757F55D180CAE1D91267B49C">
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<subSubSection id="3F0A27376FB05B89851350A1D48C8009" type="nomenclature">
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<paragraph id="022E25687BD09511DA4FFF937F83AF5F">
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<taxonomicName id="3551C361B4F8A706A58D9CBD437A6364" ID-CoL="64YQ9" authority="(Milne-Edwards, 1867)" baseAuthorityName="Milne-Edwards" baseAuthorityYear="1867" class="Mammalia" family="Sciuridae" genus="Aeretes" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="species" species="melanopterus">
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<emphasis id="9885E44698664F6BB32E65E419B1D20F" italics="true">Aeretes melanopterus</emphasis>
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(Milne-Edwards, 1867)
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</taxonomicName>
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</paragraph>
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||
</subSubSection>
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<subSubSection id="C6B3D808A50D4F458DDC3364DF5E3B33" type="description">
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||
<paragraph id="F920B6E0079D8102FD9D5DE4D9D548D5">
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<figureCitation id="09452BD9FA22926433D7600A638485F3" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Aeretes melanopterus from the Yumidong Cave. A. 12 YMDT 4 ④ 60.54, right DP 4 - M 1, occlusal view; B. 12 YMDT 4 ② 35.81, right P 4, occlusal view; C. 12 YMDT 4 ④ 60.1, left mandible, labial view; D. 12 YMDT 4 ④ 60.2, right p 4 - m 3, occlusal view. Scale bar: 5 mm (A, B, D); 10 mm (C)." figureDoi="10.3897/fr.27.e115693.figure4" httpUri="https://binary.pensoft.net/fig/1053349">Fig. 4</figureCitation>
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<xref id="AB5B1FA56316AE0CFEC7EBEB62F08D24" ref-type="supplementary-material" rid="S1">; Suppl. material 1: table S 5</xref>
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</paragraph>
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</subSubSection>
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<subSubSection id="SECID0EISAE" type="material">
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<paragraph id="1FD3C728A73676AE6D4A5C5586E9656E">
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<heading id="FDF4C118229CAACE3EE90E0F011DACD2" reason="title">Materials.</heading>
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</paragraph>
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<paragraph id="F6DC99B32C679E66F9C9CF98066CC782">
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As in Suppl. material
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<xref id="2C0A412549C0CE2C5A1F421D899BE90F" ref-type="supplementary-material" rid="S1">1</xref>
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: table S 1, there are one isolated tooth from the layer ②-2 and three maxillary bones and two mandibular bones from the layer ④.
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</paragraph>
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<caption id="D1F660F55917CF8F04BC4F54C117D130" ID-DOI="10.3897/fr.27.e115693.figure4" ID-arpha="6785F345-AAF5-5F0A-88AC-90A8F1C9D9AE" httpUri="https://binary.pensoft.net/fig/1053349" startId="F4">
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<paragraph id="B6719E61C962D3A7C7B00ED9842A9CBC">
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<label id="6524FF5FFEF49C6D1AF00B2A378133A7">Figure 4.</label>
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</paragraph>
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<paragraph id="7C375BE8A1222450850D565C824D11D1">
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<taxonomicName id="25243C64B4FCE63B4DD609E381798CF6" baseAuthorityName="Milne-Edwards" baseAuthorityYear="1867" class="Mammalia" family="Sciuridae" genus="Aeretes" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="species" species="melanopterus">
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<emphasis id="5446C13B988A0B26470A5EBC3DE95E66" italics="true">Aeretes melanopterus</emphasis>
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</taxonomicName>
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from the Yumidong Cave.
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<emphasis id="C0D90CF8477F26CA7B757DC12EA92DC9" bold="true">A.</emphasis>
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12 YMDT 4 ④ 60.54, right DP 4 - M 1, occlusal view;
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<emphasis id="547B945C6F66599FA332654D08915565" bold="true">B.</emphasis>
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12 YMDT 4 ② 35.81, right P 4, occlusal view;
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<emphasis id="AB5F77E5736BEEF86DEC99B7DF9C8B1A" bold="true">C.</emphasis>
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12 YMDT 4 ④ 60.1, left mandible, labial view;
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<emphasis id="7F1734BC2AA963C1A241AD117BBA2E1A" bold="true">D.</emphasis>
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12 YMDT 4 ④ 60.2, right p 4 - m 3, occlusal view. Scale bar: 5 mm (
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<emphasis id="3CDE1425529DEE1FB1A3A55647BF7CB2" bold="true">A, B, D</emphasis>
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); 10 mm (
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<emphasis id="6A21B39A3F66F7041615CEF67A2D03B5" bold="true">C</emphasis>
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).
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</paragraph>
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</caption>
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</subSubSection>
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<subSubSection id="SECID0EWTAE" type="description">
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<paragraph id="DFDBCFFBC6AC837A802E0B07055F94B3">
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<heading id="3A5162FC889E1986A5CC6F65E2C12155" reason="title">Description.</heading>
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</paragraph>
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<paragraph id="1723F84C70ADA7719F5BF0FB199166F5">The mandible is robust and the diastemal portion is short. The tip of the incisor is slightly higher than the worn surface of the cheek teeth. Its posterior end lies under the posterior root of m 3. The diastema is short and a medium-sized mental foramen is located at the middle part of the buccal side of the diastema. The inferior margin of the horizontal ramus is smoothly curved. A vascular notch is obvious and under the masseter muscle fossa. The masseter muscle fossa is relatively shallow with a weak ridge. Its anterior angle is at the level of the anterior root of m 1. The pterygoid muscle fossa at the lingual side is very wide and deep. Its anterior end is at the level of the posterior part of m 3. The mandibular foramen is large, oval-shaped and positioned more ventrally than the worn surface of the cheek teeth. The angular process is broken, but the preserved part shows it should be almost as wide as the ascending ramus. The upper part of the ascending ramus is badly preserved, but it seems not very high. The condylar process is a short transverse axis and its neck is long. The coronoid process is thin and higher than the condylar process.</paragraph>
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<paragraph id="D4E71D965CD471EF3E4EA397B6F0FB78">DP 4 is smaller than P 4 and M 1. Its occlusal outline is triangular. The parastyle is fused with the anteroloph, forming a high and isolated anterolingual corner. Besides the parastyle, the paracone, the metacone and the protocone are all well developed on the crown surface. The protostyle is invisible. The hypocone is very weak, close behind the protocone. The protoloph is short and straight. No obvious protoconule. The metaloph bends back at the metaconule. The enlarged metaconule is connected with the posteroloph by a short ridge, forming a small hypoconule on the posteroloph and dividing the posterior valley into two. The posteroloph is low. The posterolingual flexus is narrow and closed after being moderately worn. The anterior valley and the central valley are short and the anterior one is wider than the central one. There are one large root at the lingual side and two small ones at the buccal side.</paragraph>
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<paragraph id="41F558FF0E34FDCDA1FB4E8FB9892A69">P 3 is not preserved. On the basis of the alveolar, it should be single-rooted, not particularly small and visible from the buccal side.</paragraph>
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<paragraph id="EAFCE2F6D1DEF749CD9E729251868415">P 4 is molariformed. Its lingual side is much shorter than the buccal side, making its occlusal outline triangular. The lingual wall is wrinkled and higher than the buccal wall. The protocone is small and separated from the developed hypocone by a vertical groove (the anterolingual flexus) which extends to the base of the tooth crown. The anterolingual flexus is shallow, visible after being moderately worn. The posterolingual flexus is quite deep and narrow. There are four transverse ridges on the crown surface (the anteroloph, the protoloph, the metaloph and the posteroloph). The anteroloph is well developed and the parastyle is fused with it. The anteroloph is connected with the protocone at the slightly worn stage, but separated after being moderately worn by the anterolingual flexus. The protoloph is relatively straight. There are two ridges extending from the protoconule, the smaller one backwards and the larger one forwards. The metaconule is marked and the metaloph bends back at the metaconule. There are three small ridges extending backwards from the metaloph and two of them are connected with the posteroloph. The posteroloph is continuous and is connected with the hypocone only after being very deeply worn. Three roots, one larger at the lingual side and two smaller at the buccal side.</paragraph>
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<paragraph id="3FDB44D77496C95EB187542FCB7517D5">The occlusal outline of M 1 is close to a square. The occlusal structure is mainly composed of four cusps (the paracone, the metacone, the protocone and the hypocone) and four transverse ridges (the anteroloph, the protoloph, the metaloph and the posteroloph). The anteroloph and the posteroloph are lower than the protoloph and the metaloph. The protocone is not completely separated from the hypocone and both of them are ridge-shaped. The anteroloph and the protoloph converge with the protocone. The metaloph is connected with the hypocone. The paraconule and the metaconule are small. The main structure of the posterior lobe is similar to that of DP 4.</paragraph>
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<paragraph id="494F0BDB698FCB36ECE3304CB48D8809">The occlusal outline of p 4 is a trapezoid with a narrow anterior lobe and a wide posterior lobe. The anteroconid is small, located at the anterobuccal side of the metaconid. The metaconid is the highest amongst all cusps of the tooth. The metastylid is barely visible and is separated from the well-developed mesostylid by a deep groove. The protoconid is weaker than the metaconid, but larger than other cusps. The anterobuccal sinusid is shallow and V-shaped. The buccal valley is wide. The mesoconid is obvious. The mesolophid divides the talonid basin into two. The protolophulid is tiny and the extra posterolophid is short. The posterolophid is curved. Two roots.</paragraph>
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<paragraph id="50E547E51BF2D881FD488912C6243AEE">The lower molars have similar occlusal structure with p 4. The anterolophid is developed and connected with the anteroconid and the metaconid. The anterobuccal sinusid is much deeper than that of p 4. The mesoconid is connected with the protoconid. The metalophid is more developed than that of p 4. The posterior lobe of m 3 tapers obviously with a weak entoconid. Four roots.</paragraph>
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</subSubSection>
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<subSubSection id="SECID0EBUAE" type="comparisons">
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<paragraph id="B0897718714EDA37F25BD513875E5015">
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<heading id="B659FDA8123D25282B5F28D731073847" reason="title">Comparison.</heading>
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</paragraph>
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<paragraph id="29A1F186F097CDF8DEF0A17696FF1D11">
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Based on the dental dimensions (in Suppl. material
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<xref id="60FA3D8AAD69CE8026FBD242BCF25F09" ref-type="supplementary-material" rid="S1">1</xref>
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: table S 5), the described fossils should be a large species of flying squirrel, which is most likely to belong to either
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<taxonomicName id="6D6B3D942B9413A22BECA1541C9501A0" authorityName="Allen" authorityYear="1940" class="Mammalia" family="Sciuridae" genus="Aeretes" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="genus">
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<emphasis id="0358F6968E1A831A8CCC685F28D824E9" italics="true">Aeretes</emphasis>
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</taxonomicName>
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or
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<taxonomicName id="F56F478653A563757F86DEBD1E4513B4" authorityName="Link" authorityYear="1795" class="Mammalia" family="Sciuridae" genus="Petaurista" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="genus">
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<emphasis id="D2391D1DD6B5F577858E77A11840B308" italics="true">Petaurista</emphasis>
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</taxonomicName>
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.
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</paragraph>
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<paragraph id="F52DB12EF144BC953562A1917446D646">
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In
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<taxonomicName id="74B8D2EF998E5B26E78602644E4DF5D1" authorityName="Link" authorityYear="1795" class="Mammalia" family="Sciuridae" genus="Petaurista" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="genus">
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<emphasis id="78DC30AC790072C027265CB896E9DAC9" italics="true">Petaurista</emphasis>
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</taxonomicName>
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, M 1 / 2 lacks the hypocone and the lower cheek teeth have marked anterobuccal sinusid, which can be used for generic diagnosis and are obviously different from the features of the described fossils.
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</paragraph>
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<paragraph id="E8802CA6D24784076927ADB18C45BF9B">
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The diagnosis of the genus
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<taxonomicName id="44E72906912241C8DE1A98B042F6936E" authorityName="Allen" authorityYear="1940" class="Mammalia" family="Sciuridae" genus="Aeretes" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="genus">
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<emphasis id="1CCBB9869C78A0ED29900B3EF7938D7F" italics="true">Aeretes</emphasis>
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</taxonomicName>
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includes (summarised by
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<bibRefCitation id="FC9B4A325BF9ED3E45D5A28D388A8FDB" author="Li CK & Qiu ZD & Tong YS & Wang BY & Wu WY & Li Q & Li Q & Wang Y" journalOrPublisher="Science Press, Beijing" refId="B13" refString="Li CK, Qiu ZD, Tong YS, Wang BY, Wu WY, Li Q, Li Q, Wang Y (2019 a) Palaeovertebrata Sinica. Volume Ⅲ Fascicle 5 (1) Glires Ⅱ: Rodentia Ⅰ. Science Press, Beijing, 545 pp." title="Palaeovertebrata Sinica. Volume Ⅲ Fascicle 5 (1) Glires Ⅱ: Rodentia Ⅰ.">Li CK et al. (2019 a</bibRefCitation>
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)): P 3 small, P 4 larger than molars, the hypocone of P 4 - M 2 weak and located close behind the protocone, the protoconule and the metaconule weak, the hypoconule well developed, the posterolingual flexus very deep, the entoconid of lower molars small, the mesostylid developed and separated from the metastylid and entoconid by deep grooves and the mesoconid small. The described fossils resemble
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<taxonomicName id="2B214B8A0843DBC46AAF81CE4EA353CF" authorityName="Allen" authorityYear="1940" class="Mammalia" family="Sciuridae" genus="Aeretes" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="genus">
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<emphasis id="547A8D4097C4FD3CBF0FAB4A886F3867" italics="true">Aeretes</emphasis>
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</taxonomicName>
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.
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</paragraph>
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<paragraph id="0D945A2149C7077CD3AA10A46C3977DC">
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There are three species in the genus
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<taxonomicName id="A3784CCB96804076B41AF19281B3834E" authorityName="Allen" authorityYear="1940" class="Mammalia" family="Sciuridae" genus="Aeretes" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="genus">
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<emphasis id="D30CF1088413A7B67F9CFD488AD08B2E" italics="true">Aeretes</emphasis>
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||
</taxonomicName>
|
||
,
|
||
<taxonomicName id="55CA8459AD4A84E2676BDB1613FAB240" class="Mammalia" family="Sciuridae" genus="Aeretes" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="species" species="premelanopterus">
|
||
<emphasis id="548E9FA3F97436E33A2198EB2716A993" italics="true">A. premelanopterus</emphasis>
|
||
</taxonomicName>
|
||
,
|
||
<taxonomicName id="AFA39FE7E0B3F0AF296A68642936BC4D" class="Mammalia" family="Sciuridae" genus="Aeretes" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="species" species="grandidens">
|
||
<emphasis id="C80F01BC771BC7CBAA222BE878DA0782" italics="true">A. grandidens</emphasis>
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName id="AD3EE3B0D7EC6973F8CBC8C294711699" baseAuthorityName="Milne-Edwards" baseAuthorityYear="1867" class="Mammalia" family="Sciuridae" genus="Aeretes" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="species" species="melanopterus">
|
||
<emphasis id="29635354EAB10607BEC91492ABADD3D1" italics="true">A. melanopterus</emphasis>
|
||
</taxonomicName>
|
||
. The primitive
|
||
<taxonomicName id="80E45E85983F0B69B3D553925670D4ED" class="Mammalia" family="Sciuridae" genus="Aeretes" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="species" species="premelanopterus">
|
||
<emphasis id="D128FA4C8B2AF1B662AC5611B05AA4EA" italics="true">A. premelanopterus</emphasis>
|
||
</taxonomicName>
|
||
has weak protoconule, but strong metaconule;
|
||
<taxonomicName id="D80D851A575DB1ECD10622CC62A5B7EF" class="Mammalia" family="Sciuridae" genus="Aeretes" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="species" species="grandidens">
|
||
<emphasis id="FC47A7AA2BC338D6D0E5F2A60EDDEA0C" italics="true">A. grandidens</emphasis>
|
||
</taxonomicName>
|
||
has stronger protoconule and metaconule than
|
||
<taxonomicName id="84449F23D93C24EA5C640273F1908324" class="Mammalia" family="Sciuridae" genus="Aeretes" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="species" species="premelanopterus">
|
||
<emphasis id="E5810FE3763F81802376EDDFD02068E2" italics="true">A. premelanopterus</emphasis>
|
||
</taxonomicName>
|
||
. The protoconule and metaconule of
|
||
<taxonomicName id="76E3E96E7735319EF3D93BB03AB1FA0F" baseAuthorityName="Milne-Edwards" baseAuthorityYear="1867" class="Mammalia" family="Sciuridae" genus="Aeretes" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="species" species="melanopterus">
|
||
<emphasis id="0746C3A2EEF58B29426ECFD54CDCFB67" italics="true">A. melanopterus</emphasis>
|
||
</taxonomicName>
|
||
from different regions varies in morphology: specimens from
|
||
<collectingRegion id="C3840EC967FD36EAFA0103C63A831397" country="China" name="Chongqing">Chongqing</collectingRegion>
|
||
and
|
||
<collectingRegion id="157F77BE3D31B12E84C42FB9CBFCFBBD" country="China" name="Guizhou">Guizhou</collectingRegion>
|
||
have a very weak protoconule and developed metaconule (
|
||
<bibRefCitation id="5BCFC68A6A10F73391A3F33162A3D9A3" author="Zheng" firstAuthor="Zheng" journalOrPublisher="Science Press, Beijing" refId="B32" refString="Zheng SH (1993) Quaternary rodents of Sichuan-Guizhou area, China. Science Press, Beijing, 270 pp." title="Quaternary rodents of Sichuan-Guizhou area, China." year="1993">Zheng 1993</bibRefCitation>
|
||
), while specimens from
|
||
<collectingRegion id="8EDB4D1D7BD29BF685002764C723F785" country="China" name="Beijing">Beijing</collectingRegion>
|
||
have a marked protoconule and metaconule (
|
||
<bibRefCitation id="4BBFB6531A5A33B1C10BB3175E5F76D8" DOI="10.1016/j.geobios.2006.04.006" author="Tong" firstAuthor="Tong" journalOrPublisher="Geobios" pagination="219-230" refId="B23" refString="Tong HW (2007) Aeretes melanopterus (Pteromyinae, Rodentia) from Tianyuan Cave near Zhoukoudian (Choukoutien) in China. Geobios 40: 219–230. https://doi.org/10.1016/j.geobios.2006.04.006" title="Aeretes melanopterus (Pteromyinae, Rodentia) from Tianyuan Cave near Zhoukoudian (Choukoutien) in China." volume="40" year="2007">Tong 2007</bibRefCitation>
|
||
). The Yumidong specimens are most similar to
|
||
<taxonomicName id="B1CDC3FAAE70FD57C7676EC303566D39" baseAuthorityName="Milne-Edwards" baseAuthorityYear="1867" class="Mammalia" family="Sciuridae" genus="Aeretes" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="species" species="melanopterus">
|
||
<emphasis id="E6A194E81728EC2567D944D08301E097" italics="true">A. melanopterus</emphasis>
|
||
</taxonomicName>
|
||
from Beijng. Furthermore, comparing the Yumidong specimens with
|
||
<taxonomicName id="0C97A0B70169705C1254A53A9A813730" baseAuthorityName="Milne-Edwards" baseAuthorityYear="1867" class="Mammalia" family="Sciuridae" genus="Aeretes" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="species" species="melanopterus">
|
||
<emphasis id="D2B0651F896269FC7FB82BB7C1225269" italics="true">A. melanopterus</emphasis>
|
||
</taxonomicName>
|
||
from the Baotansi Cave in
|
||
<collectingRegion id="DE4AA9E94FD4AA1A17046B5C528B57D5" country="China" name="Chongqing">Chongqing</collectingRegion>
|
||
, there is another obvious dental morphological difference: the lingual vertical groove of P 4 is clear on the Yumidong specimens, but unclear on the Baotansi specimens.
|
||
</paragraph>
|
||
<paragraph id="7FB83722CAD1868DF4C157D352ACC68B">
|
||
Compared with the
|
||
<taxonomicName id="4F4A1986B3D7998237BC40E9426800DC" baseAuthorityName="Milne-Edwards" baseAuthorityYear="1867" class="Mammalia" family="Sciuridae" genus="Aeretes" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="species" species="melanopterus">
|
||
<emphasis id="203CF609EC7F081A03E60B44E08A2EB6" italics="true">Aeretes melanopterus</emphasis>
|
||
</taxonomicName>
|
||
from the Tianyuan Cave and extant specimens (based on
|
||
<bibRefCitation id="3D2D575D255960AE4EC700C714B98996" DOI="10.1016/j.geobios.2006.04.006" author="Tong HW" firstAuthor="Tong" journalOrPublisher="Geobios" pagination="219-230" refId="B23" refString="Tong HW (2007) Aeretes melanopterus (Pteromyinae, Rodentia) from Tianyuan Cave near Zhoukoudian (Choukoutien) in China. Geobios 40: 219–230. https://doi.org/10.1016/j.geobios.2006.04.006" title="Aeretes melanopterus (Pteromyinae, Rodentia) from Tianyuan Cave near Zhoukoudian (Choukoutien) in China." volume="40" year="2007">Tong (2007)</bibRefCitation>
|
||
), the morphological structure of the described specimens falls within their variable range. Based on dimensions, the described specimens are much smaller than the Tianyuan Cave specimens and fall within the variable range of the living species. It is reasonable to attribute these fossils to
|
||
<taxonomicName id="D820C36B5EC3321DC28D74787DA24714" baseAuthorityName="Milne-Edwards" baseAuthorityYear="1867" class="Mammalia" family="Sciuridae" genus="Aeretes" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="species" species="melanopterus">
|
||
<emphasis id="C3054AC8F11E6AE02117A020F3D3B01A" italics="true">A. melanopterus</emphasis>
|
||
</taxonomicName>
|
||
.
|
||
<bibRefCitation id="4EFCFDBDF035E078663931BF9DC165E3" DOI="10.1016/j.geobios.2006.04.006" author="Tong HW" firstAuthor="Tong" journalOrPublisher="Geobios" pagination="219-230" refId="B23" refString="Tong HW (2007) Aeretes melanopterus (Pteromyinae, Rodentia) from Tianyuan Cave near Zhoukoudian (Choukoutien) in China. Geobios 40: 219–230. https://doi.org/10.1016/j.geobios.2006.04.006" title="Aeretes melanopterus (Pteromyinae, Rodentia) from Tianyuan Cave near Zhoukoudian (Choukoutien) in China." volume="40" year="2007">Tong (2007)</bibRefCitation>
|
||
mentioned the diagnosis of this species, including: cheek teeth subhypsodont, enamel slightly rugose, the lingual wall of upper cheek teeth higher than the buccal wall, the posterolingual flexus very narrow and deep.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |