907. A NEW SPECIES OF VEPRICARDIUM (BIVALVIA; MOLLUSCA) FROM THE MIOCENE KATSUTA GROUP IN OKAYAMA PREFECTURE, SOUTHWEST JAPAN

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  • 907. 西南日本岡山県の中新統勝田層群からの Vepricardium の一新種
  • 西南日本岡山県の中新統勝田層群からのVepricardiumの1新種〔英文〕
  • セイナン ニホン オカヤマケン ノ チュウシントウ カツタソウグン カラ ノ

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Abstract

An interesting new cardiid belonging to the genus Vepricardium was discovered from a mudstone of the Middle Miocene Yoshino Formation of the Katsuta Group in Okayama Prefecture, southwest Japan. This species, Vepricardium (Vepricardium) okamotoi, sp. nov., is described herein, and its average relative growth is examined. Judging from the mode of occurrence, lithofacies and associated forms, this species must have lived in a muddy bottom in the inner sublittoral zone, and is regarded as an indicator of a tropical marine environment at that time.

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