Parent taxon: Heterotremata according to C. E. Schweitzer et al. 2010
See also Feldmann et al. 2003, Luque et al. 2017 and Todd and Collins 2005
Sister taxa: Aethroidea, Archaeochiapasidae, Bellioidea, Bythograeoidea, Calappoidea, Cancroidea, Carpilioidea, Cheiragonoidea, Componocancroidea, Corystoidea, Dairoidea, Dorippoidea, Eriphioidea, Gecarcinucoidea, Goneplacoidea, Hexapodoidea, Hymenosomatoidea, Leucosoidea, Maioidea, Majoidea, Marocarcinidae, Montezumelloidea, Orithyioidea, Parthenopoidea, Pilumnoidea, Pilumnoidoidea, Portunoidea, Potamoidea, Progeryonoidea, Pseudothelphusoidea, Retroplumoidea, Trichodactyloidea, Trichopeltarioidea, Xanthoidea
Subtaxa: Ampliura Andorina Duncanitrix Folguerolesiidae Gemmacarcinus Hepatinulus Iphiculidae Leucosiidae Matutidae Nucilobus Palaeomyra Pterocarcinus Typilobus
Type: Leucosia
Ecology: semi-infaunal carnivore
Distribution:
• Quaternary of Costa Rica (1 collection), Italy (13), Jamaica (3), Japan (3), Panama (2), the Philippines (1), United States (12: California, Florida, North Carolina, South Carolina)
• Pliocene to Pleistocene of Costa Rica (1), Italy (3)
• Pliocene of Belgium (2), Costa Rica (6), Italy (5), Jamaica (1), Japan (7), the Netherlands Antilles (1), Panama (7), United States (2: California, North Carolina)
• Miocene to Pliocene of Colombia (1), the Dominican Republic (3), United States (5: North Carolina, Virginia)
• Neogene of Fiji (1)
• Miocene of Brazil (1), Brunei Darussalam (9), Cuba (1), the Dominican Republic (17), Egypt (1), Greece (1), Hungary (8), India (4), Indonesia (3), Iran (2), Italy (2), Jamaica (1), Japan (12), Malaysia (23), Mexico (2), Panama (3), the Philippines (1), Spain (1), Sri Lanka (1), Trinidad and Tobago (1), United States (1: South Carolina), Venezuela (2)
• Oligocene to Miocene of Cuba (1)
• Oligocene of France (1), Germany (1), Hungary (1), Italy (2), United States (1: Oregon)
• Eocene of Egypt (3), Hungary (1), Italy (9), Spain (1), the United Kingdom (5), United States (4: Mississippi, North Carolina, South Carolina)
• Paleocene of United States (1: Alabama)
• Paleogene of Hungary (1)
Total: 209 collections including 290 occurrences