Infraorder Achelata Scholtz and Richter 1995 (decapod)
Parent taxon: Reptantia according to J. M. Wolfe et al. 2019
See also Hegna et al. 2020 and Poore and Ahyong 2004
Sister taxa: Astacidea, Astacura, Axiidea, Gebiidea, Glypheidea, Meiura, Thalassinidea
Subtaxa: Cancrinidae Palinura Palinuridae Palinuroidea Scyllaridae
Ecology: epifaunal carnivore