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Cite This Paper:.2014.[J].Acta Geologica Sinica(),88(3):730-737
New specimens of Stenocybus acidentatus (Therapsida: Dinocephalia) from the Middle Permian Dashankou Fauna of China    Download PDF
JIANG Shan  JI Shu-an
Institute of Geology, Chinese Academy of Geological Sciences; Key Laboratory of Stratigraphy and Paleontology, Ministry of Land and Resources; Beijing 100037, China
This paper was funded by the China Geological Survey (Grant No. 1212011120139).
      The basal dinocephalian clade Stenocybusidae was known from two incomplete specimens representing one generus, Stenocybus, from Dashankou fanua in Yumen, Gansu Province of China. The holotype of Stenocybus acidentatus is laterally compressed, making some characters unclear. Here we describe two new specimens of Stenocybus acidentatus from the same locality, an anterior portion of skull with articulated jaws, and a right dentary with nearly complete dentition. They show some detailed features on the morphology of the premaxilla, maxilla, nasal, external nares and dentary. The phylogenetic relationship between Stenocybus acidentatus and the relatively large Sinophoneus yumenensis is still difficult to determine, and needs more new complete material and further evidences.
Key words:Dinocephalia, Stenocybusidae, Dashankou Fauna, Middle Permian
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