Alternative spelling: Hildocerataceae
Synonyms: Harpoceracea Wedekind 1917, Harpocerataceae Wedekind 1917
Parent taxon: Ammonitina according to M. Benzaggagh et al. 2022
See also Arkell 1952, Arthur et al. 1993, Géczy and Szente 2006, Hillebrandt 2006, Howarth 2013, Meister and Friebe 2003, Sandoval 2022, Sarih et al. 2007, Smith and Tipper 1996 and Thomson and Smith 1992
Sister taxa: Acanthoceratoidea, Aspidoceratoidea, Deshayesitoidea, Desmoceratoidea, Engonoceratoidea, Eoderoceratoidea, Hammatoceratoidea, Haploceratoidea, Hoplitoidea, Lytoceratoidea, Oppeliaceae, Perisphinctaceae, Perisphinctoidea, Psiloceratoidea, Pulchelliaceae, Sphaeroceratoidea, Spiroceratoidea, Stephanoceratoidea, Nannolytoceratidae, Tetragonitoidea, Crioceratitaceae, Hamitaceae, Protetragonitidae
Subtaxa: Diplesioceras Graphoceratidae Hildoceratidae Phymatoceratidae Sonniniidae
Ecology: fast-moving nektonic carnivore