In 1975, J. Dale Nations divided the genus Cancer into four subgenera: Cancer (Cancer), Cancer (Glebocarcinus), Cancer (Metacarcinus) and Cancer (Romaleon).
En 1975 J. Dale Nations dividiu o xénero Cancer en catro subxéneros: Cancer (Cancer), Cancer (Glebocarcinus), Cancer (Metacarcinus) e Cancer (Romaleon).