Gopherus flavomarginatus Legler, Univ. Kansas Publ. Mus. Nat. Hist., 11:337, fig. 1, pls. 7-8, April 24, 1959.
Paratype.—No. 39415 (carapace only), 8 miles east and 2 miles south of Americanos, Coahuila, Mexico; Robert W. Dickerman; May 19, 1954.
Pseudemys scripta taylori Legler, Univ. Kansas Publ. Mus. Nat. Hist., 13:75, figs. 1-3, pls. 9-12; August 16, 1960.
Holotype.—No. 46952, 16 kilometers south of Cuatro Ciénegas, Coahuila, México; John M. Legler, September 6, 1958.
Paratypes.—Nos. 46932-46951, 46953-46969, data same as on holotype. Nos. 46970-46974, 6 miles west of Cuatro Ciénegas, Coahuila, Mexico; John M. Legler; September 3-6, 1958. No. 46976, Río Chiquito, 10 kilometers south of Cuatro Ciénegas; John M. Legler; September 9, 1958.
Trionyx ater Webb and Legler, Univ. Kansas Sci. Bull., 40:21, pls. 1-2, April 20, 1960.
Holotype.—No. 46903, 16 kilometers south of Cuatro Ciénegas, Coahuila; John M. Legler, Wendell L. Minckley, and Robert B. Wimmer; September 6, 1958.
Paratypes.—Nos. 46904-46906, 46908-46912, data same as on holotype.
Trionyx muticus calvatus Webb, Univ. Kansas Publ. Mus. Nat. Hist., 11:519, pls. 13-14, fig. 1, August 14, 1959.