Full reference: D. G. Taylor. 1998. Late Hettangian-early Sinemurian (Jurassic) ammonite biochronology of the western Cordillera, United States. Geobios 31:467-497
Sister taxa: Vermiceras (Gyrophioceras), Vermiceras (Paracaloceras), Vermiceras (Vermiceras), Protocymbites azzouzi, Metophioceras rotarium, Metophioceras trigonatum, Metophioceras galaczi, Metophioceras rotticus
Type specimen: NWMNH 25034, a shell. Its type locality is New York Canyon, Shoshone Mountains (M. trigonatum assemblage), which is in a Bucklandi marine limestone in the Sunrise Formation of Nevada.
Ecology: fast-moving nektonic carnivore
Distribution: found only at New York Canyon, Shoshone Mountains (M. trigonatum assemblage)
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.