Physalaemus aguirrei Bokermann

Ventral aspect (Fig. 1 A): At Stage 37, buccal floor triangular. Presence of two pairs of infralabial papillae. The anterior pair (hidden under the posterior pair) is thin with flattened apex, much smaller than the posterior and directed upward. The posterior pair is large, long and curved upward, easily discernible from the anterior pair. Tongue anlage elliptical, with four long and tapered lingual papillae in a transverse row. Buccal pockets horizontally oriented. In the buccal floor arena (BFA) there are three papillae on each side of the arena, pointing to the center; the first and last papillae are finger-like and the one in the middle is chela-shaped; and about ten pustulations dispersed on it. Ventral velum round shaped with small projections along its external margin. Dorsal aspect (Fig. 1 B): Buccal roof somewhat triangular. Prenarial arena longer than wide, without papillae or pustulations on it. Elliptical choanae, large, oriented 45° from transverse plane. Internarial distance 5% of the roof width. In the postnarial arena, presence of one pair of finger-like papillae pointing to the center. The median ridge is trapezoid, twice wider than long, with few projections in the superior margin. Presence of a pair of chela-shaped lateral ridge papillae. In the buccal roof arena (BRA), about twenty pustulations dispersed, and four finger-like papillae on each side directed to the center of BFA. Dorsal velum with no projections.