These specimens have been discussed in detail by Mosimann and Rabb (1953). All are from the arid tropical scrub forest; those from the coastal regions were collected at elevations of less than 40 meters, and those from the Tepalcatepec Valley were collected at an elevation of 335 meters.
Crocodilia
Crocodylus acutus acutus Cuvier
Crocodylus acutus Cuvier, Ann. Mus. Hist. Nat. Paris, 10:55, 1807.—Santo Domingo.
Crocodylus acutus acutus, Müller and Hellmich, Ibero-Amerik. Stud., 13:128, 1940.
Boca de Apiza (2); Playa Azul (2).
The crocodile or "caiman" is abundant in the brackish lagoons along the cost of Michoacán; three large adults and several juveniles were observed at Estero Pichi at Playa Azul; others were seen at Mexiquillo and Maruata. Residents of the Balsas-Tepalcatepec Basin frequently have reported "caimanes" in the Río Balsas and Río Tepalcatepec, but the existence of the crocodile in these rivers has not been verified by specimens.
Sauria
Phyllodactylus duellmani Dixon
Phyllodactylus duellmani Dixon, Southwest Nat., 5:37, April 15, 1960.—Rancho El Espinal, Michoacán, México.