†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

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Ecology: fast-moving nektonic carnivore

Distribution:

• Jurassic of Canada (6: British Columbia, Yukon collections), France (1), Germany (2), Hungary (4), Iran (1), Italy (7), Morocco (1), Spain (7), the United Kingdom (2), United States (1: Oregon)

Total: 32 collections including 37 occurrences

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