Cephalopoda - Nautilida - Liroceratidae
Alternative combinations: Parapenascoceras sanandreasense, Titanoceras sanandreasense
Full reference: A. K. Miller, C. O. Dunbar, and G. E. Condra. 1933. The nautiloid cephalopods of the Pennsylvanian system in the mid-continent region. Nebraska Geololgical Survey Bulletin 9:1-240
Belongs to Stearoceras according to P. L. Sealey and S. G. Lucas 2025
See also Clifton 1942, Miller et al. 1933, Miller and Unklesbay 1942, Miller and Youngquist 1949 and Ruzhentsev and Shimanskiy 1954
Sister taxa: Stearoceras conchiferum, Stearoceras gibbosum, Stearoceras hesperium, Stearoceras immane, Stearoceras involutum, Stearoceras militarium, Stearoceras milleri, Stearoceras phosphoriense, Stearoceras punjabicum, Stearoceras rotundatum, Stearoceras simplex, Stearoceras smithi, Stearoceras sublaeve
Type specimen: Its type locality is Penasco Valley, Highway 82, which is in a Kungurian shallow subtidal limestone in the San Andres Formation of New Mexico
Ecology: nektobenthic carnivore
Average measurements (in mm): shell diameter 118.1
Distribution:
• Permian of United States (13: Arizona, New Mexico, Texas collections)
Total: 13 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.