Microbatrachylus hobartsmithi Taylor, Univ. Kansas Sci. Bull., 26:501, November 27, 1940.
Cascada Tzararacua (6); 21 km. W of Ciudad Hidalgo; 29 km. E of Morelia; Puerto Hondo; San José de la Cumbre (13); Uruapan (2); Zitácuaro.
Of six specimens from Cascada Tzararacua, five are colored like typical M. hobartsmithi, having the anterior and posterior surfaces of the thighs and the upper arms pale pink in life and a grayish brown dorsum in preservative. The other specimen (UMMZ 94231) has in preservative a dark brown dorsolateral line on each side enclosing a pale tan area that extends from the snout to the vent. One specimen from 29 kilometers east of Morelia (UIMNH 40338) and 13 specimens from San José de la Cumbre (UMMZ 102111) do not have the prominent tarsal tubercles characteristic of M. hobartsmithi. Also, in these fourteen specimens the palmar tubercles are larger, and the dark anal patch more distinct, than in typical M. hobartsmithi. Possibly these specimens, which are from the high mountains in the eastern part of Michoacán, represent another species of Microbatrachylus. However, Taylor (1940d:501) reported a series of M. hobartsmithi from the mountains 10 miles west of Villa Victoria in the western part of the state of México.
The largest specimen from Michoacán is a gravid female (UIMNH 16104) having a snout-vent length of 23.5 mm.
Microbatrachylus hobartsmithi has been found in rocky ravines along streams in the Cordillera Volcánica and the southwestern escarpment of these mountains at elevations from 1450 to 2750 meters.
Microbatrachylus pygmaeus (Taylor)
Eleutherodactylus pygmaeus Taylor, Trans. Kansas Acad. Sci., 39:352, 1937.—1 mile north of Rodriguez Clara, Veracruz, México.
Microbatrachylus pygmaeus Taylor, Univ. Kansas Sci. Bull., 26:500, November 27, 1940.
Microbatrachylus albolabris Taylor, Univ. Kansas Sci. Bull., 26:502, November 27, 1940.—2 miles west of Córdoba, Veracruz, México.
Microbatrachylus minimus Taylor, Univ. Kansas Sci. Bull., 26:507, November 27, 1940.—Agua del Obispo, Guerrero, México.