Parent taxon: Heterotremata according to S. De Grave et al. 2009
See also Lima et al. 2023
Sister taxa: Archaeochiapasidae, Bellioidea, Bythograeoidea, Calappoidea, Cancroidea, Carpilioidea, Cheiragonoidea, Componocancroidea, Corystoidea, Dairoidea, Dorippoidea, Eriphioidea, Gecarcinucoidea, Goneplacoidea, Hexapodoidea, Hymenosomatoidea, Leucosioidea, Leucosoidea, Maioidea, Majoidea, Marocarcinidae, Montezumelloidea, Orithyioidea, Parthenopoidea, Pilumnoidea, Pilumnoidoidea, Portunoidea, Potamoidea, Progeryonoidea, Pseudothelphusoidea, Retroplumoidea, Trichodactyloidea, Trichopeltarioidea, Xanthoidea
Subtaxa: Aethridae
Type: Aethra
Ecology: epifaunal carnivore
Distribution:
• Quaternary of Costa Rica (1 collection), Jamaica (3), Panama (1), United States (5: California, Pennslyvania, Texas)
• Pliocene of Costa Rica (1), Jamaica (1), the Netherlands Antilles (1), Panama (7)
• Miocene to Pliocene of Colombia (1)
• Miocene of Argentina (3), Brazil (2), Chile (1), the Dominican Republic (7), Malaysia (1), Mexico (2), Panama (4), Trinidad and Tobago (1), Venezuela (4)
• Oligocene to Miocene of Cuba (2)
• Eocene of Egypt (1), Italy (13), Mexico (3), Pakistan (1), Panama (1), United States (11: Oregon, South Carolina, Washington), Venezuela (1)
• Paleogene of Mexico (2)
Total: 81 collections including 89 occurrences