Cephalopoda - Ceratitida - Trachyceratidae

Alternative combination: Ammonites homfrayi

Full reference: W. M. Gabb. 1864. Description of the Triassic fossils of California and the adjacent territories. Geological Survey of California Palaeontology 1:19-35

Belongs to Sirenites according to N. J. Silberling and K. M. Nichols 1982

See also Gabb 1864

Sister taxa: Sirenites betulinus, Sirenites hayesi, Sirenites irregularis, Sirenites lawsoni, Sirenites malayicus, Sirenites nanseni, Sirenites ovinus, Sirenites senticosus, Sirenites serotinus, Sirenites smithi

Type specimen: ANSP 30793. Its type locality is East Range, Humboldt (Homfray coll), which is in a Julian marine limestone in the Augusta Mountain Formation of Nevada.

Ecology: nektonic carnivore

Average measurements (in mm): shell diameter 47.0

Distribution: found only at East Range, Humboldt (Homfray coll)

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Specimen images are retrieved through the ePANDDA API.