The Tadpole of Scinax constrictus Lima, Bastos & Giaretta, 2004 (Amphibia, Hylidae)
Scinax constrictus is the only species in the Scinax rostratus group endemic to the Cerrado in Brazil. Here, we describe the external morphology and internal oral features of the S. constrictus tadpole and compare it with other known tadpoles of the S. rostratus group. The tadpole of S. constrictus has a wide dorsal gap and a ventral gap in the marginal papillae of the oral disc, a labial tooth row formula of 2(2)/3(1) with P3 modified as a labial arm, and without infralabial and lingual papillae.
Scinax constrictus é a única espécie do grupo S. rostratus endêmica do Cerrado brasileiro. Neste artigo descrevemos a morfologia externa e oral interna do girino de S. constrictus e comparamos com girinos do grupo S. rostratus. O girino de S. constrictus tem um amplo gap dorsal e um gap ventral nas papilas marginais do disco oral, fórmula dentária 2(2)/3(1), com P3 modificada em braço labial, e ausência de papilas infralabiais e linguais.Abstract
Resumo
Tadpole of Scinax constrictus (ZUFG 732) at stage 37: (A) lateral view; (B) dorsal view. Scale bar = 10 mm.
Tadpoles of Scinax constrictus: (A) detail of nares and spiracle; (B) intestinal tube; and (C) oral disc. Scale bar = 2 mm.
Internal oral features of Scinax constrictus tadpoles (ZUFG 838) at stage (37): (A) buccal floor and (B) buccal roof. Abbreviations: BFA = buccal floor arena; BFAP = buccal floor arena papillae; BRA = buccal roof arena; PRNA = prenarial arena; MR = median ridge; LRP = lateral ridge papilla; PONA = postnarial arena; PSP = postnarial papillae; VV = ventral velum. Scale bar = 5 mm.
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