†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: