Kingdom Animalia Class Cephalopoda Order Lytoceratida Rank Genus | Phylum Mollusca Subclass Ammonoidea Superfamily Ancylocerataceae | |
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Aspinoceras is an extinct heteromorph ammonite that lived during the Early Cretaceous. The shell small; starts off with a few loosely wound whorls not in contact followed by a short moderately curved shaft ending in a broad hook. Surface covered with mostly fine, close spaced ribs, with periodic larger ribs. In general form it resembles Ancyloceras.
Aspinoceras has been found in upper Hauterivian - lower Barremian formations in Europe and California.
References
Aspinoceras Wikipedia(Text) CC BY-SA