Rhinella pombali (Baldissera, Caramaschi & Haddad)

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 : 510

Rhinella pombali (Baldissera, Caramaschi & Haddad)

Material: one specimen (stage 32), two specimens (stage 39).

Buccal floor ( Fig. 4A ): 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. There are three small infrarrostral projections on each side. Four lingual papillae, in equivalent size, the two lateral ones are bifurcated and the two median ones are digitiform (forming a " YIIY " design), with tapered apex and arranged in the same transversal plane. The BFA is delimited by nearly 40 digitiform papillae in different size, tapered apex and nearly 40 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 15 globular projections in the middle portion. Buccal roof ( Fig. 4B ): Ovoid buccal roof, wider than long. Prenarial arena has an acuminate ridge and irregular apex. Large choanae, elliptical and obliquely oriented; the posterior valve is high and the anterior has four prenarial papillae on the inner edge and narial valve projections are present. The distance between the choanae is almost equivalent to median ridge width. The postnarial arena has four digitiform papillae on each side, in different size, smooth surface, tapered apex and arranged forming an inverted " V " design. Before these papillae there are about five pustules. Median ridge is triangular-shaped, flattened and anterior margin irregular. The lateral ridge papillae have the apex wider than the base, flattened, with three digitiform secondary branches in different size and anterior margin of the branches with slight irregularities. The BRA is delimited by nearly five digitiform papillae on each side, in different size, elongated, tapered apex and arranged on the side. There are nearly 45 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 4. Scanning electron micrographs of the internal oral morphology. Rhinella pombali (A) floor and (B) roof, stage 34, ZUFRJ 3318; R. pygmaea (C) floor and (D) roof, stage 32, MNRJ 49738; Rhinella schneideri (E) floor and (F) roof, stage 32, DZSJRP 711.1.