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Diatomys
''Diatomys'' is a hystricomorphous sciurognathous rodent known from Miocene deposits in China, Japan, Pakistan, and Thailand. The fossil range is from the late Early Miocene to the Middle Miocene (22.5-11 Ma).
== Specimens ==
Specifically the strata and regions from which ''Diatomys'' has been collected are: Shanwang series in Shandong province, China, Jiangsu province in China, Kyūshū in Japan, the Siwaliks in northern Pakistan, and Li Basin in Lamphun Province, Thailand.
Li (1974) described ''Diatomys shantungensis'' on the basis of two moderately complete specimens from Shandong. This material had good preservation of dental characters, but much of the skull was difficult to interpret due to flattening. Dawson ''et al.'' (2006) reported the finding of another ''D. shantungensis'' fossil from Shandong that showed much improved preservation of cranial and skeletal characters. Impressions of hair and whiskers were observable in the specimen.
Mein and Ginsburg (1985) described ''Diatomys liensis'' from Thailand, and considered it distinct enough to warrant recognition as separate from ''D. shantungensis''. ''D. liensis'' was found to be smaller overall, with a higher molar crown height and distinctions in cusp morphology in the premolar and first molar.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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