PaleoDB taxon number: 297588
Full reference: D. G. Taylor. 1998. Late Hettangian-early Sinemurian (Jurassic) ammonite biochronology of the western Cordillera, United States. Geobios 31:467-497
Type specimen: NWMNH 25031, a shell. Its type locality is First Canyon, Shoshone Mountains (Canadensis zone), which is in an Angulata marine limestone in the Sunrise Formation of Nevada.
Ecology: fast-moving nektonic carnivore
Average measurements (in mm): shell width 23.5, shell diameter 116.6