Scinax sp. 2

Schiesari, Luis, Rossa-Feres, Denise De Cerqueira, Menin, Marcelo & Hödl, Walter, 2022, Tadpoles of Central Amazonia (Amphibia: Anura), Zootaxa 5223 (1), pp. 1-149 : 74

Scinax sp. 2

External morphology. Description based on four tadpoles at Stages 35 and 37 (LCS 618). Total length 26.7 ± 1.1 mm (N = 4). Body ovoid in dorsal view and triangular in lateral view ( Fig. 44A, B ). Snout rounded in dorsal and lateral views. Eyes medium-sized, positioned and directed laterally. Nostrils small, circular, dorsally positioned, near to eyes, with opening anterolaterally directed, without a projection on the marginal rim. Oral disc ( Fig. 44C ) ventral, ventrolaterally emarginate; marginal papillae conical, uniseriate, with a dorsal gap. Submarginal papillae present laterally. LTRF 2(1,2)/3; A1 and A2 of the same length; P2 and P3 longer than P1. Jaw sheaths wide, finely serrated; anterior jaw sheath M-shaped, posterior jaw sheath V-shaped. Spiracle single, sinistral, short and wide, conical, posterodorsally directed, opening in the posterior third of the body, with the centripetal wall fused to the body wall and longer than the external wall. Vent tube dextral, fused to the ventral fin, with a dextral opening. Caudal musculature of moderate width; in lateral view gradually tapering to a pointed tip. Dorsal fin high, originating on the posterior third of the body, convex; ventral fin of moderate height and convex. Tail tip pointed.

Colour. In preservative body and caudal musculature creamy white with many melanophores distributed in blotches; fins translucent with melanophores forming blotches in a marbled pattern.

Metamorphs. Metamorph marbled grey with a drak grey dorsolateral stripe; iris reddish.

Natural history. Eggs were not observed. Tadpoles are found in isolated forest ponds in terra-firme forests.

Figures

FIGURE 44. Tadpole of Scinax sp. 2 (LCS 618) at Stage 37: (A) lateral view, (B) dorsal view (scale = 10 mm), and (C) oral disc (scale = 1 mm). (D) Dorsolateral view of newly metamorphosed froglet.