Adenomera diptyx

Adenomera diptyx (Boettger, 1885), redescription Figs 3–6; Tables 2–3 Diagnosis Adenomera diptyx is recognized within Adenomera by the following combination of character states: (1) body slender; (2) medium size (adult male SVL = 18.2–23.1 mm); (3) a long vertebral pin stripe, extending from the interorbital region to the vent;(4) a distinctive interorbital bar; (5) toe tips unexpanded, tending to a tapered point; (6) antebrachial tubercle absent; (7) single-note advertisement call; (8) call notes formed by incomplete pulses; (9) short note duration (28–49 ms); (10) high note repetition rate (176–299 per minute); and (11) low pulse number (2–6 per note). Type material Lectotype PARAGUAY • &male; (Fig. 3A–C); “ Paraguay, Amer. Merid ” (exact locality unknown); 1985; H.R. Rhode leg.; BMNH 1947.2.17.47. Paralectotypes (3 specimens examined; one specimen not examined, possibly lost) PARAGUAY • 1 spec.; same collection data as for lectotype; BMNH 1947.2.17.48 (Fig. 3D–E) • 1 spec.; same collection data as for lectotype; ZMB 10595 • 1 spec.; same collection data as for lectotype; NMW 4475 (Fig. 4). Material examined PARAGUAY – Amambay • 6 &female;&female;; Parque Nacional Cerro Corá; 22°39′56″ S, 56°00′24″ W; MNHNP 0416, 0429, 1221, 4420, 4492, 5709 • 1 &female;; same collection data as for preceding; UNNEC 13937 • 2 &male;&male;; same collection data as for preceding; MNHNP 0418, 0438 • 1 &male;; same collection data as for preceding; UNNEC 13936. – Cordillera • 2 &female;&female;; Piribebuy; 25°28′06″ S, 57°02′33″ W; CZCEN 0646, 0647, 0650 • 8 &male;&male;; same collection data as for preceding; CZCEN 0640 to 0645, 0648, 0649. Redescription of A. diptyx The original description of the syntypes of Adenomera diptyx by Boettger (1885) included the main morphological characters of the species, some of which were later highlighted by Heyer (1973) when he designated the species’ lectotype. The following re-description is based on all the specimens seen and examined by us, including specimens recently collected and linked to calls and DNA sequences. Morphology Body medium, slender (SVL = 18.2–25.9 mm); head nearly as broad as long (HW/HL = 1.06). Measurements of males and females are given in Table 2. Sexual dimorphism in head shape: males with snout sub-elliptical dorsally and acuminate laterally due to the presence of a developed, shovel-shaped, fleshy ridge, and females with snout rounded laterally, without a fleshy ridge (Fig. 5D). Canthus rostralis round, indistinct; loreal region slightly concave; eye dorsolateral, its diameter about 34% of head length; pupil horizontal, elliptical; palpebral membrane translucent, bordered in its upper edge by a black streak; tympanum distinct, its diameter about 47% eye diameter; tympanic membrane translucent; supratympanic fold well developed, extended from eye to arm insertion; nostrils anterolateral, closer to the tip of the snout than to the eye; internarial distance about 28% head width; postcommissural gland oval; lower lip with a medial projection that fits into a notch in the upper; tongue ovoid; males with vocal sac subgular with a fold parallel to jaw extending to forearm; maxillary and premaxillary teeth present; vomerine teeth present, located posterior to and between choanae, arranged in straight transverse rows. Dorsum glandular; with numerous, small, white-tipped tubercles posteriorly; two pairs (dorsal and lateral) of glandular rows starting behind the eyes and running towards the posterior part of dorsum; ventral surface smooth, except on thigh, areolate; pectoral fold absent, lateral and abdominal folds distinct; axillary gland small; arm short and robust, finger tips rounded, not expanded; relative finger length IV <I = II <III; inner metacarpal tubercle oval and ½ to &frac23; smaller than the outer metacarpal tubercle, circular; palmar tubercles present; subarticular tubercles prominent, rounded, the one on the thumb remarkably larger than the others; shank slightly longer than thigh; thigh length about 41% SVL; relative toe length I <II <V <III