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The Ammonellipsitinae is a subfamily (one of two) within the Pericyclidae, a family within the goniatitid superfamily Pericyclaceae from the Lower Carboniferous(Mississippian) characterized by having a suture in which the sides of the ventral lobe diverge and the first lateral saddle is acute or subacute, and in which the immature and juvenile shell has a wide umbilucus. Of the four genera so far included, ''Fascipericyclus'', ''Helicocyclus'', and ''Stenocyclus'' were once considered subgenera of ''Pericyclus''. The type genus, ''Ammonellisites'' was also included in the older Pericylitinae that was part of the Goniatitidae in Miller et al. (1960) Ammonellipsitinae have been found mostly in Europe but some have been found in North America (US) as well ==References== * Miller, Furnish, and Schindewolf (1960) ; Paleozoic Ammonoidea, in the Treatise on Invertebrate Paleontology, Part L, Ammonoidea; Geological Soc. of America and Univ of Kansas. * . 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「Ammonellipsitinae」の詳細全文を読む スポンサード リンク
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