Tomodactylus rufescens Duellman and Dixon
Tomodactylus rufescens Duellman and Dixon, Texas Jour. Sci., 11:78, March, 1959.—Dos Aguas, Michoacán, México.
Dos Aguas (14); 18 km. E of Dos Aguas (6).
Fourteen specimens from the pine-oak forests around Dos Aguas (UMMZ 118503-10, 121498-9) have reddish brown dorsal color and a narrow cream-colored middorsal line (Pl. 5, Fig. 2). Twelve of these specimens are adult males having snout-vent lengths of 20.7 to 24.6 (22.5) mm. One female has a snout-vent length of 24.8 mm., and one juvenile has a snout-vent length of 14.5 mm. Six specimens are from a region of mixture of pine-oak forest and arid tropical scrub forest at 18 kilometers east of Dos Aguas (UMMZ 121497, 121500). All are males having snout-vent lengths of 18.0 to 22.6 (20.7) mm. The dorsum is tan marked with black; the thighs are yellowish orange.
The specimens from 18 kilometers east of Dos Aguas were found on July 22, 1960, by Floyd L. Downs and John Winklemann, who collected calling males of Tomodactylus rufescens and Tomodactylus nitidus petersi at the same locality. Downs (personal communication) stated the call was a single note. At Dos Aguas I heard T. rufescens give two calls, one a single "peep," the other a triple note—"pee-ee-eep."
In the higher parts of the Sierra de Coalcomán Tomodactylus rufescens seems to fill the same niche as T. angustidigitorum does in the Cordillera Volcánica. At lower elevations in their respective mountain ranges the species occur sympatrically with T. nitidus petersi.
Diaglena reticulata Taylor
Diaglena reticulata Taylor, Univ. Kansas Sci. Bull., 28:60, May 15, 1942.—Cerro Arenal, Oaxaca, México.
Nueva Italia (3); Ostula (7).
Until recently frogs of the genus Diaglena were known only from a few specimens from southern Sinaloa (Diaglena spatulata) and from the Pacific lowlands of the Isthmus of Tehuantepec (Diaglena reticulata). Peters (1955a) reported specimens from Ostula, Michoacán, and compared these specimens with one D. reticulata from Tehuantepec, Oaxaca, and four D. spatulata from Sinaloa. This comparison showed that the specimens from Michoacán, although showing some minor differences from D. reticulata, are closer to that species than to D. spatulata. Subsequent to Peters' work, series of both species of Diaglena, including additional specimens from Michoacán and from Colima, have been collected, and a more qualified comparison is now possible.