Alternative spelling: Sepioidea
Parent taxon: Decabrachia according to R. Hoffmann et al. 2022
See also Anderson 1938, Boyle and Rodhouse 2005, Doyle et al. 1994, Jeletzky 1966, Sepkoski 2002, Squires 1984 and Wells and Houston 2001
Sister taxa: Belemnitida, Diplobelida, Longibelus, Myopsida, Oegopsida, Sepiolida, Spirulida, Teuthida
Subtaxa: Adygeya Amerirostra Belosaepiidae Belosepiellidae Belosepiidae Chondrophoridae Idiosepiidae Notosepia Sepiadariidae Sepiidae Sepiolidae
Ecology: fast-moving nektobenthic carnivore
Distribution:
• Pliocene of Holy See (Vatican City State) (1 collection)
• Miocene of Australia (5)
• Oligocene of United States (1: Washington)
• Eocene of the Netherlands (1), Nigeria (1), the United Kingdom (3), United States (4: California, Texas, Washington)
• Paleocene of Egypt (3)
• Cretaceous of Canada (1: British Columbia)
Total: 20 collections including 21 occurrences