Family Sphaeroceratidae | Phylum Mollusca Rank Genus | |
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Megasphaeroceras is an ammonite genus included in Sphaeroceratidae, a family of ammonoid cephalopods characterized by their sphaeroidal shells with markedly eccentric coiling, fine ribbing, and complex sutures, known from the lower middle Jurassic.
References
Megasphaeroceras Wikipedia(Text) CC BY-SA