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 median lateral groove or fillet. The median (middle) keel is the tallest.

Ochetoceratinae
Temporal range: 161.2–145.5 Ma[1]
Scientific classification
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Ochetoceratinae

Spath, 1928.
Genera [1]

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

Description

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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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  • W.J. Arkell, et al. 1957 Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology, Part L. Geological Society of America and University of Kansas Press.
  • D.T. Donovan, J.H. Callomon, and M.K. Howarth, 1981. Classification of the Jurassic Ammonitina. The Systematica Association Special Volume no. 18. The Ammonoidea. Academic Press.