Cephalopoda - Ceratitida - Ceratitidae
Alternative combinations: Ammonites blakei, Ceratites (Gymnotoceras) blakei
Synonym: Beyrichites falciformis Smith 1914
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 Gymnotoceras according to C. Monnet and H. Bucher 2005
See also Gabb 1864, Hyatt and Smith 1905, Konstantinov 1991, Meek 1877, Silberling and Nichols 1982, Smith 1904, Smith 1914 and Spath 1934
Sister taxa: Acrochordiceras foltzense, Gymnotoceras crimicus, Gymnotoceras falcatum, Gymnotoceras ginsburgi, Gymnotoceras inflatum, Gymnotoceras mimetus, Gymnotoceras olenekense, Gymnotoceras praecursor, Gymnotoceras rotelliformis, Gymnotoceras sublaqueatum, Gymnotoceras tasaryense, Gymnotoceras weitschati, Gymnotoceras zvetkovi
Type specimens:
- Gymnotoceras blakei: USNM 12512. Its type locality is Star Canon, Humboldt, which is in an Illyrian carbonate limestone in Nevada.
- Beyrichites falciformis: Its type locality is Divide between Troy Canyon and South Fork of American Canyon (rotelliformis), which is in an Illyrian marine limestone in Nevada.
Average measurements (in mm): shell diameter 38.8
Distribution:
• Triassic of Canada (1: British Columbia collection), the Russian Federation (7), Svalbard and Jan Mayen (2), United States (20: Nevada), Vietnam (1)
Total: 31 collections including 32 occurrences
Specimen images are retrieved through the ePANDDA API.
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