Guinot, 1977
Female gonopores in sternal position (vulvae). Male in a coxal or coxo-sternal position. Thus internal fertilization. Absence of spermathecae, the paired seminal receptacles being a part of the genital ducts. Uropods never present in the shape of vestigial platelets. Presence of a flat thoracic sternum intercalated between the pereiopods. Generally a true sterno-abdominal cavity. Locking apparatus of the abdomen generally consisting of a typical press-button, exceptionally atypical (Leucosiidae for example) or absent (Cryptochiridae for example). Male Pl 1 forming a tube completely rolled. Male Pl 2 sometimes longer or as long as Pl 1, more usually shorter. (Guinot 1998)
Superfamilies treated:
superfamily Corystoidea Samouelle, 1819
superfamily Cryptochiroidea Paulson, 1875
superfamily Dorippoidea MacLeay, 1838
superfamily Leucosioidea Samouelle, 1819
superfamily Majoidea Samouelle, 1819
superfamily Palicoidea Moosa & Serène, 1981
superfamily Parthenopioidea MacLeay, 1838
superfamily Pinnotheroidea de Haan, 1833
superfamily Portunoidea Rafinesque, 1815
superfamily Potamoidea Ortmann, 1896
superfamily Retroplumoidea Gill, 1894
superfamily Xanthoidea MacLeay, 1838