Stearoceras

Stearoceras is an extinct genus of prehistoric nautiloids from the Lower Pennsylvanian (Upper Carboniferous) - Lower Permian with a fair worldwide distribution.(Kümmel 1964)

Stearoceras
Temporal range: U Carb (Penn) - L Perm
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Nautiloidea
Order: Nautilida
Family: Grypoceratidae
Genus: Stearoceras

Stearoceras is recognized by its involute shell with a depressed subtrapizoidal whorl section and slight ventral and lateral lobes. In contrast Stenoporceras is subdiscoidal and has a suture with broad lateral lobes and a deep ventral saddle as found in syringonautilids.(ibid)

Nautiloids are a subclass of shelled cephalopods that were once diverse and numerous but are now represented by only a handful of species.

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