Ochetoceratinae

Ochetoceratinae
Temporal range: Late Jurassic
Scientific classification
Class: Cephalopoda
Subclass: Ammonoidea
Order: Ammonitida
Superfamily: Haplocerataceae
Family: Oppeliidae
Subfamily: Ochetoceratinae
Spath, 1928.
Genera

See text

The Ochetoceratinae is a subfamily within the Oppeliidae from the Upper Jurassic, shells of which are typically oxycones with a tricarinate venter and falcoid ribbing, commonly divided by a medain lateral groove or fillet. The median (middle) keel is the tallest.

The Ochetoceratinae may be polyphyletic, derived from both the Oppeliidae and Hecticoceratinae as suggested by differences in the included genera.

Genera

The following genera are included in the Ochetoceratinae

Ochetoceras, type
Campylites
Cubaochetoceras
Cymaceras
Fehlmanites
Oxydiscites
Trimarginites

The median lateral groove is well developed in Ochetoceras and Fehlmanites, less discernible in Cymaceras, but missing or difficult to make out in the other four.

References

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