Rhinella granulosa (Spix)

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 granulosa (Spix)

Material: Two specimens (stage 32), one specimen (stage 36).

Buccal floor ( Fig. 2A ): Ovoid buccal floor, wider than long. Two pairs of infralabial papillae, the most anterior pair is short, centralized and with irregular apex, the second pair is elongated, concave on the anterior surface, with irregular apex and occupying a large part of the oral cavity entrance. There are three small infrarrostral projections on each side. Four lingual papillae, with equivalent size, all elongated and with bifurcated apex in “Y” design and arranged on the same transversal plane. The BFA is delimited by nearly 30 digitiform papillae in different size, tapered apex and nearly 85 pustules distributed between the papillae. There are no structures in the anterior region of the BFA. Laterally to the buccal pockets there is a large and bifurcated papilla. 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 ten globular projections, with two middle projections being larger than the other. Buccal roof ( Fig. 2B ): Ovoid buccal roof, wider than long. Prenarial arena has a sinuous ridge and irregular apex. Large choanae, elliptical, almost transversely arranged; the posterior valve is high and the anterior has two 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 digitiform papillae on each side, in different size, anterior margin and apex with irregularities and arranged in an inverted " V " design. Before these papillae there are about four pustules. Median ridge is triangular-shaped; flattened and anterior margin irregular. The lateral ridge papillae have the apex wider than the base, flattened, apex with three digitiform secondary branches in different size and anterior margin of the branches with slight irregularities. The BRA is delimited by five or six digitiform papillae on each side, elongated, with smooth surface, tapered apex and aligned on the side of the BRA. Laterally of these papillae there are about four to five small conical papillae. 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 elongated projections in the middle region.

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.