Rhinella ornata (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 : 509

Rhinella ornata (Spix)

Material: four specimens (stage 31), two specimens (stage 34), two specimens (stage 35) and two specimens (stage 36).

Buccal floor ( Fig. 3E ): 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, in equivalent size, the two lateral ones are bifurcated and the two median ones are digitiform (forming a " YIIY " design), with rounded apex and arranged in the same transversal plane. The BFA is delimited by nearly 30 digitiform papillae in different size, tapered apex and nearly 50 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 margin, not tumid, with glandular appearance, constituted by secretory pits and without projections. Buccal roof ( Fig. 3F ): Ovoid buccal roof, as wide as long. Prenarial arena has a sinuous 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. 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 and tapered apex, united by the base 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 four digitiform secondary branches in different size and anterior margin of the branches with slight irregularities. The BRA is delimited by four to five digitiform papillae on each side, in different size, elongated, tapered apex and arranged on the side. There are nearly 35 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 projections with irregular margin in the middle region.

Figures

FIGURE 3. Scanning electron micrographs of the internal oral morphology. Rhinella icterica (A) floor and (B) roof, stage 38, DZSJRP 1508.5; R. jimi (C) floor and (D) roof, stage 31, UFBA11820; R. ornata (E) floor and (F) roof, stage 36, DZSJRP 1192.3.