Hyla langei, a New Frog from Parana, Southern Brasil

Abstract

DESCRIPTION OF HOLOTYPE. -Adult male (total length 66. O0 mm). Head broader (23. 0 mm) than long; snout not projecting, rounded in lateral profile (Figure 4); canthus well defined; loreal region concave; tympanum very small (2. 2 mm in diameter), nearly circular, indistinct and partially hidden under the supratympanic fold, little more than one-fourth the diameter of eye, and separated from the posterior border of eye by a distance nearly twice its own diameter. Supratympanic fold well developed. Eye projected antero-laterally, its transverse diameter (8. 2 mm) larger than the distance from eye to nostril (5. 2 mm). Nostrils placed under the canthus rostralis and directed slightly backward. Interorbital distance, nearly the same as the horizontal diameter of eye. Internal nares nearly circular; vomerine teeth in two separate patches, between and posterior to the internal nares (Figure 5). Tongue large and flat, nearly circular, slightly free and notched behind, occupying nearly the entire floor of the mouth. Vocal sac subgular; slits under the margin of the tongue. Fingers webbed at base, with well developed terminal discs larger than tympanum. First finger with a well developed bifid prepollex (Figures 2, 3). Subarticular and supernumerary tubercles well developed; carpal tubercles poorly differentiated. Forearm greatly thickened, almost as in certain Leptodactylus. Upper arm with a humeral crest and a humeral hook similar to the condition in Hyla martinsi. Hind limbs normal, heels barely overlap when legs are folded at right angles to axis of body; tibio-tarsal articulation reaches to eye. Toes three-fourths webbed; the web reaches the disc of toes 3 and 5 and the penultimate phalange of toe 4. Discs of toes slightly smaller than those of fingers; subarticular and supernumerary tubercles well developed; only one tarsal tubercle, on the base of first toe; tarsalfold poorly developed. Skin of dorsum nearly smooth; ventrally the skin is smooth in the gular region and becomes more granular posteriorly; abdomen and ventral surface of thigh very granular. The coloration is faded in this preserved specimen. The dorsum is brown; the sides of the head and body are lighter. The concealed surfaces of the thighs and ventral surface of the body are very light brown. The dorsal surfaces of the forearms, thighs, tibiae, and tarsi have indistinct light cross bars.