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Raphistomatidae : ウィキペディア英語版 | Raphistomatidae
The †Raphistomatidae is a taxonomic family of fossil sea snails, Paleozoic marine gastropod mollusks. This family was established by Koken in 1896. This family is found in the fossil record from the Upper Cambrian to the Middle Permian. ==Description== The shells of the snails in this family are lenticular, turbiniform, and stepped, with a short slit, notch, or sinus on the aperture lip that generally results in a selenizone.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Raphistomatidae」の詳細全文を読む
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