Family Geryonidae Colosi 1923 (crab)
Parent taxon: Portunoidea according to S. Casadio et al. 2005
Sister taxa: Carcineretidae, Carcinidae, Catoptridae, Lithophylacidae, Longusorbiidae, Macropipidae, Pirimelidae, Psammocarcinidae, Thiidae
Subtaxa: Archaeogeryon, Chaceon
Ecology: epifaunal carnivore