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Zurcherella
''Zurcherella'' is a Lower Cretaceous (Upper Barremian - Upper Aptian desmoceratid ammonite. Its shell is moderately compressed and rather involute (outer whorls covering most of the inner), with fine sinuous ribs that arise some distance above the umbilical rim. ''Zurcherella'' differs from its descendant ''Uhligella'' in that in the latter, ribs arise from the umbilical shoulder. ''Zurcherella'' is the earliest of the desmoceratid subfamily Beudanticeratinae, which includes among others, ''Uhligella'', ''Beutanticeras'', and ''Beutantiella''. ==References==
* Arkell, et al., 1957. Mesozoic Ammonoidea; Treatise on Invertebrate Paleontology, Part L. Geological Society of America and University of Kansas Press. ''L''368.
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「Zurcherella」の詳細全文を読む
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