The Amphibians and Reptiles of Sinaloa, Mexico - Smithsonian ...
The Amphibians and Reptiles of Sinaloa, Mexico - Smithsonian ...
The Amphibians and Reptiles of Sinaloa, Mexico - Smithsonian ...
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AMPHIBIANS AND REPTILES OF SINALOA, MEXICO 91<br />
Phrynohyas venulosa: validated by fiat, International Commission <strong>of</strong> Zoological<br />
Nomenclature, Opinions <strong>and</strong> Decisions, 1958:169.<br />
Remarks.—Eight specimens, seven males <strong>and</strong> a female (one panin<br />
amplexus) , were collected south <strong>of</strong> Escuinapa on August 3. <strong>The</strong><br />
males were located in the water by their calls. <strong>The</strong> pond was about<br />
25 centimeters deep <strong>and</strong> surrounded by secondary vegetation.<br />
On the afternoon <strong>of</strong> September 2, near Teacapan, another<br />
Phrynohyas was heard calling from a coconut palm during a light<br />
rain. <strong>The</strong> following day a second male called from a strangler fig<br />
tree in dense forest. Both eluded capture. Judging from the two<br />
diurnal encounters <strong>and</strong> field experience with this frog elsewhere, we<br />
assume the P. venulosa is arboreal most <strong>of</strong> the time <strong>and</strong> descends to<br />
the ground only to breed. <strong>The</strong> only other specimens known from<br />
<strong>Sinaloa</strong> were collected near Presidio by Forrer (Boulenger, 1882:<br />
327-28).<br />
A study <strong>of</strong> the genus Phrynohyas in <strong>Mexico</strong> <strong>and</strong> Central America<br />
(McDiarmid, 1968) forms the basis for assigning the <strong>Sinaloa</strong>n frogs<br />
to P, venulosa.<br />
Distribution in <strong>Sinaloa</strong>.—Known from two localities in the southern<br />
lowl<strong>and</strong>s. See Fig. 25.<br />
Specimens examined.—9.4 mi. SE Escuinapa (LACM 6315-19, 7245}.<br />
Literature record.—Presidio (Boulenger, 1882:327-28).<br />
Phyllomedusa dacnicolor Cope<br />
Phyllomedusa dacnicolor Cope, Proc. Acad. Nat, Sci. Philadelphia, 16:181,<br />
September 30, 1864 (type locality, Colima, Colima).<br />
Remarks.—Fifty-four males have snout-vent lengths <strong>of</strong> 60-77 (68)<br />
<strong>and</strong> tibia lengths <strong>of</strong> 23-29 (26). Thirty-three females have snoutvent<br />
lengths <strong>of</strong> 46-92 (67) <strong>and</strong> tibia lengths <strong>of</strong> 18-38 (28). Sexual<br />
dimorphism in snout shape, as described by Duellman (1957a :30),<br />
was evident in all specimens examined.<br />
In the rainy season this large hylid is usually abundant near<br />
temporary rain pools throughout the lowl<strong>and</strong>s <strong>of</strong> <strong>Sinaloa</strong>. Several<br />
were taken from trees along a small stream near Carrizalejo, on<br />
the night <strong>of</strong> June 18, in association with Smilisca baudinii, Rana<br />
pipiens, Leptodactylus occidentalus, Bufo mazatlanensis <strong>and</strong> Leptodeira<br />
splendida ephippiata. Phyllomedusa dacnicolor was found<br />
with Pternohyla fodiens, Bufo kelloggi, B. marinas, Hyla smithi,<br />
Rana pipiens, <strong>and</strong> Natrix valida valida at a large roadside rain pool<br />
near Villa Uni6n. All males observed calling were doing so from<br />
trees or branches around or above the ponds. Phyllomedusa is one<br />
<strong>of</strong> the few amphibians active during the dry season. Thirteen speci-
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