Cephalopoda - Ammonoidea - Diplomoceratidae

Full reference: W. J. Kennedy, N. H. Landman, and W. A. Cobban. 2001. Santonian Ammonites from the Blossom Sand in Northeast Texas. American Museum Novitates 3332:1-9

Belongs to Glyptoxoceras according to W. J. Kennedy et al. 2001

Sister taxa: Glyptoxoceras aquisgranense, Glyptoxoceras brasiliense, Glyptoxoceras ellisoni, Glyptoxoceras parahybense, Glyptoxoceras retrorsum, Glyptoxoceras rugatum

Type specimen: USNM 490970, a shell

Ecology: fast-moving nektonic carnivore