sentences:  The type specimen is an adult male long.The southern sawtail catshark closely resembles "G. antillensis", and with it belongs to the "G. arae" species complex along with "G. arae", "G. cadenati", and "G. springeri".In 2006, Getulio Rincon and Carolus Vooren reported that the range of morphometric variation in this species was greater than previously thought, casting doubt on the characters originally used to distinguish it from "G. antillensis", such as the length of the pectoral fin margins.