Cephalopoda - Nautilida - Tainoceratidae
Synonym: Metacoceras biseriatum Miller and Unklesbay 1942 [replaced name]
Full reference: A. K. Miller and W. Youngquist. 1949. American Permian nautiloids. Geological Society of America Memoir 41:1-218
Belongs to Metacoceras according to B. S. Kues 1987
Sister taxa: Metacoceras altilobatum, Metacoceras artiense, Metacoceras baylorense, Metacoceras bituberculatum, Metacoceras bowmani, Metacoceras cheneyi, Metacoceras chittidilense, Metacoceras copei, Metacoceras dorashamense, Metacoceras dorsoarmatum, Metacoceras dubium, Metacoceras hayi, Metacoceras hunanense, Metacoceras inconspicuum, Metacoceras knighti, Metacoceras kruglovi, Metacoceras medlicottianum, Metacoceras orthogonium, Metacoceras parartiense, Metacoceras subpiszovi, Metacoceras subquadratum, Metacoceras sulciferum
Type specimens:
- Metacoceras unklesbayi: MNA 563/GZ.1506
- Metacoceras biseriatum: MNA 563/GZ.1506. Its type locality is Lake Mary Road, Flagstaff, which is in a Roadian shallow subtidal limestone in the Kaibab Formation of Arizona.
Ecology: nektobenthic carnivore
Average measurements (in mm): shell width 96.4, shell diameter 190.4