Chondrichthyes - Hexanchiformes - Orthacodidae

Synonym: Orthacodontidae de Beaumont 1960 [objective synonym]

Full reference: L. S. Glikman. 1957. O geneticheskoy svyazi semeystva Lamnidae i Odontaspidae i novykh rodakh verkhnemelovykh lamnid. Trudy Geologicheskogo Muzeya Imeni A.P. Karpinskogo 1:110-117

Parent taxon: Hexanchiformes according to E. Villalobos-Segura et al. 2025

See also Duffin and Ward 1993, Itoigawa 1977, Rees 2000, Stumpf and Kriwet 2019 and Underwood 2006

Sister taxa: Chlamydoselachidae, Crassonotidae, Eonotidanus, Heptranchidae, Hexanchidae, Hexanchoidei, Komoksodontidae, Paraheptranchias, Paranotidanus, Pseudonotidanidae, Thrinax, Weltonia

Subtaxa: Archaeogracilidens Occitanodus

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Ecology: nektonic carnivore

Distribution:

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