Alternative combinations: Paracaloceras (Gyrophioceras) morganense, Paracaloceras morganense
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 25036, a shell. Its type locality is Graylock section, P. morganense assemblage, which is in an Angulata marine limestone in the Graylock Formation of Oregon.
Average measurements (in mm): shell diameter 47.8
Total: 4 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.