Redescription of the type specimen of Csakvaromys sciurinus (Rodentia, Sciuridae, Xerinae) from the Late Miocene of Hungary and its bearing on the systematics of early ground squirrels
| Pages | 258–268 |
|---|---|
| DOI | 10.37520/fi.2024.020 |
| Keywords | Csakvaromys, Sciuridae, ground squirrels, Miocene, taxonomy |
| Type of Article | Peer-reviewed |
| Citation | SINITSA, Maxim V. a ČERMÁK, Stanislav. Redescription of the type specimen of Csakvaromys sciurinus (Rodentia, Sciuridae, Xerinae) from the Late Miocene of Hungary and its bearing on the systematics of early ground squirrels. Fossil Imprint / Acta Musei Nationalis Pragae, Series B – Historia Naturalis. Prague: National Museum, 2024, 80(2), 258–268. DOI: https://doi.org/10.37520/fi.2024.020. ISSN 2533-4050 (tisk), 2533-4069 (online). Also available from: https://publikace.nm.cz/en/periodicals/fossil-imprint-acta-musei-nationalis-pragae-series-b-historia-naturalis/80-2/redescription-of-the-type-specimen-of-csakvaromys-sciurinus-rodentia-sciuridae-xerinae-from-the-late-miocene-of-hungary-and-its-bearing-on-the-systematics-of-early-ground-squirrels |
Csakvaromys sciurinus is an enigmatic stem ground squirrel from the Late Miocene of Hungary that has previously only been briefly described. The restudy of the holotype allows a detailed redescription and comparison with different xerines. Csakvaromys sciurinus is recognized as a junior synonym of Csakvaromys bredai and diagnosed by the following combination of characters: medium size, close to the maximum limits of C. bredai; massive body of the mandible with deep diastemal portion and shallow diastemal depression; elevated area of the mental foramen; nonconfluent lower and upper masseteric crests separated by the attachment area for the anterior fibers of the anterior deep masseter muscle; transversely compressed lower incisor with longitudinally striated anterior enamel face; and brachyodont cheek teeth with mesoconids, rudimentary entoconids, and well-developed anteroconulid of p4.
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