†subfamily Trigonoceratinae Hyatt 1884 (mollusk)
Cephalopoda - Nautilida - Trigonoceratidae
Parent taxon: Trigonoceratidae according to D. Korn 2025
Sister taxa: Chouteauoceratinae, Coelonautilus, Vestinautilinae
Subtaxa: Apogonoceras Discitoceras Nautiloceras Rineceras Stroborineceras Triboloceras Trigonoceras
Type: Trigonoceras
Ecology: nektobenthic carnivore
Distribution:
• Permian of Australia (1 collection), Kazakhstan (1)
• Carboniferous of Algeria (1), Ireland (15), Kazakhstan (3), Morocco (2), the Russian Federation (3), the United Kingdom (2), United States (3: Arkansas, Indiana, Oklahoma)
Total: 31 collections including 33 occurrences