Order Hexanchiformes de Buen 1926 (elasmobranch)
Chondrichthyes - Hexanchiformes
Parent taxon: Squalomorphi according to R. van der Laan 2019
See also Bogan et al. 2016, Cahuzac et al. 2007, Carnevale 2007, Cione and Reguero 1994, Cvancara and Hoganson 1993, dos Santos et al. 2024, Kent 2018, Landau et al. 2025, Long 2011, Long et al. 1993, Nelson et al. 2016, Purdy et al. 2001, Rees 2000, Sepkoski 2002, Stumpf and Kriwet 2019, Thies 1983, Underwood 2006 and Underwood and Ward 2004
Sister taxa: Echinorhiniformes, Hexanchida, Pristiophoriformes, Protospinaciformes, Squaliformes, Squatiniformes
Subtaxa: Chlamydoselachidae Crassonotidae Heptranchidae Hexanchidae Hexanchoidei Komoksodontidae Orthacodidae Paraheptranchias Paranotidanus Weltonia
Ecology: nektonic carnivore