Cephalopoda - Nautilida - Trigonoceratidae
Full reference: A. Hyatt. 1884. Genera of fossil cephalopods. Proceedings of the Boston Society of Natural History 22:253-338
Parent taxon: Trigonoceratoidea according to D. Korn 2025
See also Hyatt 1894, Korn et al. 2022, Niko and Mapes 2007 and Teichert et al. 1964
Sister taxa: Dasbergoceratidae, Grypoceratidae, Temnocheilidae, Thrincoceratidae
Subtaxa: Chouteauoceratinae Coelonautilus Trigonoceratinae Vestinautilinae
Type: Trigonoceras
Ecology: nektobenthic carnivore
Distribution:
• Permian of Australia (1 collection), Kazakhstan (1), Pakistan (1)
• Carboniferous to Permian of Japan (2)
• Carboniferous of Algeria (1), Australia (2), Ireland (15), Kazakhstan (5), Morocco (3), the Russian Federation (7), the United Kingdom (4), United States (3: Arkansas, Indiana, Oklahoma)
Total: 45 collections including 54 occurrences