Cephalopoda - Ammonitida - Psiloceratidae
Full reference: D. G. Taylor. 1998. Late Hettangian-early Sinemurian (Jurassic) ammonite biochronology of the western Cordillera, United States. Geobios 31:467-497
Belongs to Franziceras according to L. M. Longridge et al. 2008
See also Taylor 1998 and Taylor and Guex 2002
Sister taxa: Franziceras coronoides, Franziceras kennecottense, Franziceras ruidum, Franziceras sunrisense
Type specimen: NWMNH 25025, a shell. Its type locality is Graylock section, P. morganense assemblage, which is in an Angulata marine limestone in the Graylock Formation of Oregon.
Ecology: fast-moving nektonic carnivore
Average measurements (in mm): shell diameter 25.2
Distribution:
• Jurassic of Canada (6: British Columbia collections), United States (2: Oregon)
Total: 8 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.