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

AMPHIBIANS AND REPTHJES OF SINALOA, MEXICO 71
completely co-ossified with the skull, a wider metataisal tubercle,
larger eye, wider skull (Taylor, 1938:508), fewer large creamcolored
blotches (Davis and Dixon, 1957b: 145), and the absence
of vaguely outlined paravertebral light lines (Smith and Sanders,
1952:209). Based on an examination of 101 specimens from Sinaloa,
Tamaulipas, and Texas, no consistent differences warranting subspecific
designation of the population in western Mexico were
observed.
Spadefoot toads were collected at night on the road or at temporary
ponds throughout the lowlands. Breeding commences with
the first heavy rains and continues through September. Calling
males were collected in the first week of July and amplexing pairs
were secured at La Cruz on August 18 and 20. All calling males
were floating in the water,
Distribution in Sinaloa.—Known from throughout the lowlands
of the state. See Fig. 13.
Specimens examined.—Aguapepe (CAS 89756); 2.1 mi. NE Concordia
(CSCLB 1850-53); 4.7 mi. NE Concordia (CSCLB 1859); 14 mi. N Culiacan
(CSCLB 1869); 21.4 mi. S Culiacan (LACM 6043); 2.9 mi. N Elota (CSCLB
1862, 1866); 3 mi. S Esoinal (CSCLB 1855); Guamuchil (UCLA 14806);
La Cruz, 9 m. (" KU 73772-74; LACM 6000-03) : 5 mi. NE La Cruz (LACM
6039-40); 10 mi. NE La Cruz (LACM 6025-33); 61 km. N Los Mochis ("KU
62201); 18,4 mi. NW Los Mochis tumoff (on hwy. 15) (UAZ 7657, 7660-67);
20.7 mi. NW Los Mochis tumoff (on hwy. 15) (UAZ 7669-70); 30 km. NNW
Los Mochis ("KU 37826); Matatan, 170 m. (»KU 73771); 7.3 km. SW
Matatan, 155 m. ( s KU 78251-52); Mazatlan (CAS 89709-10: CSCLB 1861);
N Mazatlan (LACM 6011); 5 mi. N Mazatlan (CSCLB 1846-48); 8 mi. N
Mazatlan (CSCLB 1854); 10.3 mi. N Mazatlan (LACM 6006-07); 10.6 mi. N
Mazatlan (CSCLB 1864); 11.3 mi. N Mazatlan (LACM 6044); 13.5 mi. N
Mazatlan (UAZ 7668); 16,7 mi. N Mazatlan (CSCLB 1867): 20.7 mi, N Mazatlan
(JMS osteo. coll.); 22.5 mi. N Mazatlan (LACM 6010); 41 mi. N
Mazatlan (LACM 6041); 1.2 mi. W hwy. 15 [ca. 55 mi. N Mazatlan] nr. Rio
Piaxtla (CSCLB 1863,1865); 8 km. SSE Rosario (* KU 29888-89); San Ignacio
(LACM 6034-37); 1.5 km. ENE San Lorenzo (*KU 48045-71); Teacapan
(LACM 6508-14); 9.5 mi. S Tropic of Cancer [on hwy. 15] (CSCLB 1856-58);
9 km. NE Villa Union (* KU 75199); 12.8 mi. SE Villa Union (LACM 6038).
Literature records.—Concordia, 400 ft.; 20 mi, N Mazatlan, 150 ft. (Davis
and Dixon, 1957b;145); 2 mi. E Mazatlan (Taylor, 1938:508).
Additional records.—23.3 mi. S Caitime (FAS 8588-89); 1.1 mi. E Concordia
(CAS 99617-8); 2 mi. N Culiacan (AMNH 59285); 7-8 mi. N Culiacan (FAS
12620); 1 mi. NE El Fuerte (UIMNH 40681-82); 1.3 mi. S Rio Elota (CAS
99644-5); West half La Cruz Rd. (CAS 99655); 13 mi. NNE Los Mochis
(UIMNH 40654-55); Mazatlan (CAS 95735-39; FMNH 110607, 110610,
110616-17, 110620, 110622-23, 110627, 110629, 110632; UIMNH 31815-21;
UMMZ 115392 [6 spec.J); 8.5 mi. N Mazatlan (CAS 99385); 9.6 mi. N
Mazatlan (CAS 99393); 9.8 mi, N Mazatlan (CAS 99395-96); 10.7 mi. N
Mazatlan (CAS 99400-01); 10.9 mi. N Mazatlan (CAS 99402); 11.0 mi. N
Mazatlan (CAS 99403); 12.3 mi. N Mazatlan (CAS 99404); 14.1 mi. N
Mazatlan (CAS 99406); 22.1 mi. N Mazatlan (CAS 99413-15); 22.3 mi. N
Mazatlan (CAS 99416-17); 22.4 mi. N Mazatlan (CAS 99421-22); 22.7 mi.
N Mazatlan (CAS 99424); 22.7-37.4 mi. N Mazatlan (CAS 99425); 43.9 mi.