Journal article

A new glirid-like cricetid from the lower Oligocene of Southern China

  • Lu, Xiao-Yu JURASSICA Museum, Porrentruy, Jura Canton, Switzerland / Department of Geosciences, University of Fribourg, Fribourg, Switzerland
  • Ni, Xijun Key Laboratory of Evolutionary Systematics of Vertebrates, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, PR China
  • Maridet, Olivier JURASSICA Museum, Porrentruy, Jura Canton, Switzerland / Department of Geosciences, University of Fribourg, Fribourg, Switzerland
    2021
Published in:
  • Journal of Vertebrate Paleontology. - 2021, p. e1917587
English Here we report a new cricetid s.l., Caecocricetodon yani, gen. et sp. nov., discovered in the early Oligocene of the Caijiachong Formation in Yunnan Province, China. The new cricetid differs from all known cricetids or stem muroids by its particular molar pattern displaying numerous crests and spurs. Our phylogenetic analysis based on a matrix including 42 taxa and 72 characters indicates that the new species has a close relationship with Paracricetodontinae, forming a monophyletic clade with Paracricetodon and Trakymys. The new cricetid also has a likely close relationship with Pappocricetodon. However, the genus Pappocricetodon is polyphyletic in our analysis. Considering the similarity of the brachydont lophodont teeth of Caecocricetodon and glirids, we propose that the new species underwent convergent evolution with dormice, possibly adapting to an arboreal ecological niche in Oligocene of southern China.
Faculty
Faculté des sciences et de médecine
Department
Département de Géosciences
Language
  • English
Classification
Paleontology
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/309411
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