Mantidactylus mocquardi Angel 1929

Mantidactylus mocquardi Oral disc: Oral configuration is described and illustrated in Randrianiaina et al. (2011a) and reproduced here (Fig. 1). SEM micrographs show details of the M-shaped upper jaw sheath, with a long, thin middle portion weakly keratinized, with marginal serrations that change from triangular to filiform and curved distally (Fig. 6A); lower jaw sheath V-shaped, poorly keratinized, and finely serrated medially (Fig. 6B). Buccal floor (Fig. 6B, C): Tongue anlage with one pair of flat, tall, lingual papillae asymmetric with multifid tips. Buccal floor arena delimited by two long, thick crests formed of about 20 transverse ruffled ridges closely spaced (100–400 µm long, 50–75 µm wide). Buccal floor arena smooth except a medial, posterior area covered by dense pustulations and short papillae. Glottis not visible. Buccal roof (Fig. 6D): Prenarial arena with a wide inverted-V crest with smooth margin. Internal nares large and elliptical, transversely oriented; posterior margin partially concealed by a tall, conical postnarial arena papilla anteriorly directed. Median ridge triangular and tall. Lateral ridge papillae absent. Buccal roof arena partially ornamented with c. 23 bilateral, transverse, parallel ruffled ridges of densely packed, short papillae; these ridges never meet medially with the contralateral ones, and the central region of the arena remains smooth with some scattered pustulations; laterally, each ridge ends in a hand-like flap papilla that recurves medially; these flaps are large in the middle section, and gradually decrease in size rostral and caudally. Overall, ridges are 250–350 µm long and 90–130 µm wide. Dorsal velum unfortunately damaged in SEM images.