Cephalopoda - Ammonitida

Parent taxon: Acanthocerataceae according to W. J. Kennedy et al. 1980

Sister taxa: Acanthoceratidae, Brancoceratidae, Coilopoceratidae, Collignoniceratidae, Flickiidae, Forbesiceratidae, Libycoceratidae, Lyelliceratidae, Prolyelliceratidae, Pseudotissotiidae, Sphenodiscidae, Vascoceratidae

Subtaxa: Epileymeriella, Leymeriella

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Ecology: fast-moving nektonic carnivore