Paleoparadoxia from the middle Miocene of Obara, Misaki-cho, Okayama Prefecture, Japan

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  • 岡山県美咲町小原周辺に分布する中部中新統からのPaleoparadoxiaの産出報告
  • オカヤマケン ミサキマチ オハラ シュウヘン ニ ブンプ スル チュウブ チュウ シントウ カラ ノ Paleoparadoxia ノ サンシュツ ホウコク

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Abstract

The partially preserved left humerus of the Desmostylia (Mammalia) has been collected from the riverbed in Obara, Misaki-cho, Okayama Prefecture in the western Japan. This specimen can be classified to the genus Paleoparadoxia by the following features: the absence of the supratrochlear foramen; the curved disto-lateral border of the shaft in the antero-posterior view; the medio-laterally expanded flat trochlea of humerus. Moreover, this specimen can be referred to cf. P. media on the basis of its middle-sized dimensions. This is the second occurrence of Palaeoparadoxia from Okayama Prefecture.

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