The Amphibians and Reptiles of Sinaloa, Mexico - Smithsonian ...

AMPHIBIANS AND REPTILES OF SINALOA, MEXICO 79
Tomodactylus saxatilis Webb
Tomodactylus saxatilis Webb, Univ. Kansas Fubl., Mus, Nat. Hist., 15:177,
1 fig., March 7, 1962 (type locality, eight miles west of ElPalmito,
Sinaloa, approx, 6100feet).
Remarks.—This frog occurs in the lower montane dry forest o£
southeastern Sinaloa. It has been recorded also in mixed boreal—
tropical forest near Pueblo Nuevo in Durango (Webb and Baker,
1962:330).
Distribution in Sinaloa.—Known only from the type locality. See
Fig. 19.
Specimens examined.—8 mi, W ElPalmito [Durango] (KU 63326 holotype,
KU 63327-33 paratypes).
Family Bufonidae
Bufo alvarius Guard
Bufo alvarius Girard, in Band, Report on the United States and Mexican
Boundary Survey, 2:26, pi. 41, Figs. 1-6, 1859 (type locality, valley of
the Gil a and Colorado rivers).
Remarks.—Two adult specimens of Bufo alvarius are olive drab
dorsally with yellowish cream venters. Glands are present on fore
and hind limbs. A female with egg-filled ovaries has a snout-vent
length of 150 and a male has snout-vent length of 144. The increase
of favorable habitats created by cultivation probably has aided the
dispersal of this species in Sinaloa.
Distribution in Sinaloa.—Bufo alvarius occurs in the lowland
tropical thorn forest of northern Sinaloa. See Fig. 17.
Specimens examined.—10 km. ESE Guasave (° KU 43571-72); 5.4 mi. SW
San Bias (CSCLB 1771).
Literature records.—7 mi, W Guamuchil (Riemer, 1955:17); 24 mi. N Los
Mochis, 50 ft.; 35-45 mi. N Los Mochis, 100 ft. (Davis and Dixon, 1957b:145).
Additional record.—20 mi. N Culiacan (FAS 12611) [needs verification].
Bufo kelloggi Taylor
Bufo kelhggi Taylor, Univ. Kansas Sci. Bull,, 24:510, February 16, 1938
(type locality, two miles east of Mazatlan, Sinaloa).
Remarks.—The snout-vent lengths for 12 females of Bufo kelloggi
are 33.6-48.8 (38.8), and for 29 males are 28.4-40.1 (35.1).
Specimens were first encountered on July 12 near La Cruz during
a light rain. Several large choruses were found in late August between
Espinal and the Rio Elota. Calling males were first heard
in mid-August, suggesting that the species breeds later in the rainy
season than most of the other species in the state. Males usually
call out of water, often perched on small islands in a pond.