Abstract of Smith R.R., R.R. Miller, and W.D. Sable. 1979. Species relationships among fishes of the genus Gila in the upper Colorado River Drainage, pp 613-623 in R.R. Linn (ed.) Proc. First Conf. Sci. Res. Nat. Parks. U.S. Dept. Interior. Washington.

Keys to the species of Gila--roundtail chub, humpback chub, and boneytail chub--are presented along with methods for discriminating hybrids.