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

AMPHIBIANS AND REPTILES OF SINALOA, MEXICO 85
indiscernible externally, except in large adults, which seem to have
fewer warts over the tympanum. Supraorbital crests are absent in
the smallest toads, but become more evident with an increase in
snout-vent length. The color pattern, shape of the parotoid glands,
and the habitat were the primary bases for the identification of the
juveniles.
Two specimens have been reported from the coastal lowlands near
Mazatlan and Presidio. The specimen (AMNH 13253) reported by
Kellogg (1932:67) is Bufo mazailanensis. A second specimen was
listed by Giinther (1885-1902:254) and Kellogg (1932:64) as coming
from Presidio, Sinaloa. No other specimens have been collected
on the coastal plain. Duellman (1961:28) mentioned specimens
from near 900 meters, the lowest altitudinal limit of the species in
Michoacan. Other locality information indicates that the species
inhabits pine and oak forests in Mexico. It seems likely that
Giinther's specimen, if it is Bufo occidentalis, was collected to the
east of Presidio in the foothills of the Sierra Madre Occidental rather
than on the coastal plain, and that Presidio was the port or origin of
shipment of the specimen rather than the collecting locality.
Distribution in Sinaloa.—Known from several localities in pineoak
forest between 1100 and 2000 meters near Santa Lucia. See
Fig. 23.
Specimen! examined.—4 mi. E [by hwy. 40] El Palmito [Durango] (CSCLB
1786); 2.6 km. SW El Palmito (Durango), 2015 m. ('KU 78302-03); 2.2 km.
NE Santa Lucia, 1150 m (• KU 78296-98); 19.2 km. NE Santa Lucia, 1940 m.
(• KU 78299-301, 78304-12); Santa Rita (LACM 6198); 4.8 mi. E Santa Rita
(LACM 6196); 0,9 mi. W Santa Rita (LACM 6197); 1.2 mi. W Santa Rita
(LACM 6195); 47.2 mi. NE Villa Union (CSCLB 1787).
Literature records.—El Bate], 5100 ft. (Riemer, 1955:21); plomosas (Kellogg,
1932:67); Presidio [?J (Giinther, 1885-1902:254; Kellogg, 1932:64).
Additional record.—9.6 mi. SWE1 Palmito (UMMZ 123027).
Bufo punctatus Baird and Guard
Bufo punctatus Baird and Girard, Proc. Acad. Nat. Sci. Philadelphia, 6:173,
1854 (based on a specimen from Rio San Pedro [Devil's River], Val Verde
Co., Texas).
Remarks.—B. punctatus has been taken at scattered localities:
on the coastal plain near Guamuchil, Navolato, and Mazatlan, and
in the mountains at El Batel and Plomosas. Taylor (1938:508)
found a specimen beneath a rock near Mazatlan. In other parts of
its range the toad usually is found in arid situations, and is active
during or after rains.
Distribution in Sinaloa.—Probably occurs throughout the state.
See Fig. 18.
6—3685