Rank Genus | Superfamily Hildocerataceae | |
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Zurcheria is a genus of dwarf ammonites from the Middle Jurassic included in the Sonniniidae and lacking a keel. The shell is evolute, inner whorls exposed; whorls compressed and slightly overlapping. Bears ribs, which are sinuous folds that project strongly onto the arched venter.
References
Zurcheria Wikipedia(Text) CC BY-SA