Procambarus (Girardiella) regalis Hobbs & Robison 1988

Hobbs & Robison 1988. The crayfish subgenus Girardiella (Decapoda: Cambaridae) in Arkansas, with the descriptions of two new species and a key to the members of the Gracilis group in the genus Procambarus. Proceedings of the Biological Society of Washington, 101(2) 1988: 391-413