†subfamily Tmetoceratinae Spath 1936 (ammonite)
Cephalopoda - Ammonitida - Hildoceratidae
Parent taxon: Hildoceratidae according to M. K. Howarth 2013
Sister taxa: Arieticeratinae, Bouleiceratinae, Grammoceratinae, Harpoceratinae, Hildoceratinae, Leukadiellinae, Mercaticeratinae, Paroniceratinae, Protogrammoceratinae
Subtaxa: Tmetoceras
Ecology: fast-moving nektonic carnivore
Distribution:
• Jurassic of Canada (6: British Columbia, Yukon collections), France (1), Germany (2), Hungary (4), Iran (1), Italy (7), Spain (7), the United Kingdom (2), United States (1: Oregon)
Total: 31 collections including 36 occurrences