Parent taxon: Pleocyemata according to C.E. Schweitzer and R.M. Feldmann 2023
See also De Grave et al. 2009, Hegna et al. 2020 and Wolfe et al. 2019
Sister taxa: Achelata, Astacidea, Axiidea, Caridea, Gebiidea, Procaridea, Reptantia, Stenopodea, Stenopodidea
Subtaxa: Adamanteryon Eopolycheles Eryonoidea Tonneleryon
Ecology: semi-infaunal carnivore
Distribution:
• Miocene of the Dominican Republic (1 collection)
• Oligocene of United States (1: Washington)
• Eocene of United States (1: Washington)
• Cretaceous of Switzerland (1)
• Jurassic of Antarctica (2), Canada (1: British Columbia), France (5), Germany (8), Italy (3), Switzerland (1), the United Kingdom (16)
• Triassic of Austria (2), Italy (10), Japan (1), Slovenia (1), the United Kingdom (3)
Total: 57 collections including 97 occurrences