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''Amphiscapha'' is a fossil gastropod mollusk, or less likely a monoplacophoran, genus from the Pennsylvanian and Lower Permian of North and South America, included in the family Euomphalidae. It is sometimes regarded as a subgenus of ''Straparollus'', ''S. (Amphiscapha)'' Knight 1942 ==Description== The shell in this genus is hyper strophic discoidal, with a flat base and a concave upper side. The location of what is presumed to be the exhalent channel is marked by a smooth or rugose ridge along the upper-outer margin, which lies along the edge of a flat to concave outer rim. ==References== *J. B. Knight et al. 1960. Systematic descriptions; Treatise on Invertebrate Paleontology; Part I, Mollusca(1): ''I''192. *(Paleobiology database info on Amphiscapha ) 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「Amphiscapha」の詳細全文を読む スポンサード リンク
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