Rhinella henseli (Lutz)

Oliveira, Marianna Isabella Rosa Rodrigues De, Weber, Luiz Norberto & Napoli, Marcelo Felgueiras, 2013, Internal oral morphology in larvae of the genus Rhinella Fitzinger, 1826 (Amphibia, Anura, Bufonidae), Zootaxa 3745 (5), pp. 501-523 : 505

Rhinella henseli (Lutz)

Material: Three specimens (stages 31, 35, 36).

Buccal floor ( Fig. 2C ): Ovoid buccal floor, wider than long. One pair of large papillae, concave on the anterior surface, apex with elongated projections and occupying a large part of the oral cavity entrance. Infrarrostral projections are absent. Four lingual papillae, digitiform, in equivalent size, tapered apex (in a specimen at stage 31 was observed a very short fifth papilla) and arranged on the same transversal plane. The BFA is delimited by nearly 40 digitiform papillae in different size, tapered apex and nearly 35 pustules distributed between the papillae. There are no structures in the anterior region of the BFA. The buccal pockets are transversely oriented. The ventral velum is long and U-shaped; undulated and tumid margin, with glandular appearance, constituted by secretory pits and nearly 16 globular projections in the middle portion. Buccal roof ( Fig. 2D ): Ovoid buccal roof, longer than wide. Prenarial arena has a transversal ridge and irregular apex. Large choanae, elliptical and obliquely oriented; the posterior valve is high and the anterior has three prenarial papillae on the inner edge and narial valve projections are present. The distance between the choanae is equivalent to median ridge width. The postnarial arena has four conical papillae on each side, in different size; the two most posterior ones may be united by the base, smooth surface, rounded apex and arranged in an inverted " V " design. Median ridge is trapezoid-shaped; flattened and anterior margin irregular. The lateral ridge papillae have the base as wide as the apex, flattened, with three digitiform secondary branches in different size and anterior margin of the branches with slight irregularities. The BRA is delimited laterally by three to four digitiform papillae on each side, short, tapered apex and arranged forming a " V " design. There are nearly 55 pustules evenly distributed in the middle region of the BRA. Conspicuous glandular zone, thickened in the middle portion. The dorsal velum is short; undulated margin, with the lateral fold showing a glandular appearance and irregular margin in the middle region, without projections.

Figures

FIGURE 2. Scanning electron micrographs of the internal oral morphology. Rhinella granulosa (A) floor and (B) roof, stage 36, UFBA11362; R. henseli (C) floor and (D) roof, stage 35, DZSJRP 1576.4; R. hoogmoedi (E) floor and (F) roof, stage 34, UFBA 11105.