Zemistephanus - AbsoluteAstronomy.com

Zemistephanus is an extinct genus of cephalopod belonging to the Ammonite

Ammonite

Ammonite, as a zoological or paleontological term, refers to any member of the Ammonoidea an extinct subclass within the Molluscan class Cephalopoda which are more closely related to living coleoids Ammonite, as a zoological or paleontological term, refers to any member of the Ammonoidea an extinct...

subclass.

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