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

74 UNIVERSITY OF KANSAS PUBLS., MUS. NAT. HIST.
of the forest about 10 a. m. This was one of the few Sinaloan frogs
exhibiting a diurnal activity period.
Distribution in Sinaloa.—Known only from intermediate elevations
in the southern part of the state. See Fig. 15.
Specimens examined.—San Ignacio (LACM 6203); 5 km. SW San Ignacio,
200 m. (*KU 78255).
Literature records.—Plomosas (Kellogg, 1932:111; Smith and Taylor,
1948; 62).
Additional records,—7.1 mi. E Concordia (CAS 99622); 9.8 mi, E Concordia
(CAS 99613); 15.7 mi. E Concordia (CAS 99610).
Eleutherodactylus vocalis Taylor
Eleutherodactylus vocalis Taylor, Univ. Kansas Sci. Bull., 26:401, pi. 44,
Fig. 8, November 27, 1940 (type locality, Hacienda El Sabino, Michoacan);
Lynch, Heipetologica, 21:105, June 25, 1965.
Remarks.—According to Taylor (1940a: 401) the tibiotarsal articulation
reaches to between the eye and the nostril, and the heels
do not touch when the limbs are folded. The heels do not touch in
13 of 25 specimens examined from Sinaloa, but of the remaining
12, 11 overlap (KU 41531 excluded). The tibiotarsal articulation
reaches to the eye in two, beyond the eye in four, to the snout in
17, and beyond the snout in two. Duellman (1958b:7) obtained
similar results for specimens from Colima. Zweifel (1959c:2) reported
sexual dimorphism in specimens from Nayarit; the length of
tympanum (including ring) divided by width of head was 0.24-0.26
(0,254) in three males and 0.15-0.18 (0.170) in eight females; in
these specimens the snout-vent length ranged from 31 to 58 mm.
The same ratio for 19 adults (snout-vent lengths of more than 32
mm,) from Sinaloa is 0.16-0.18 (0.169) in four males and 0.16-0.21
(0.177) in 15 females. The tarsal fold is pale in specimens from
Colima, but dark in those from Veracruz and Chiapas (Duellman,
1958b:7). Of the 63 specimens examined by us from Nayarit,
Jalisco, Oaxaca, Veracruz, and Chiapas, only seven (four from
Veracruz and three from Chiapas) have dark tarsal folds. Duellman
(1960:56) recorded 15 specimens from a total of 200 that had a
pale middorsal stripe. Two of the 25 specimens from Sinaloa have
a pale middorsal stripe.
Eleutherodactylus vocalis frequently is found near streams or
in rocky canyons. One individual (KU 73812) was found in a
small crevice of a mine shaft in the pine-oak forest zone of northern
Sinaloa; two other specimens were taken in mines.