Hypsiboas punctatus rubrolineatus (B. Lutz)

Kolenc, Francisco, Borteiro, Claudio, Alcalde, Leandro, Baldo, Diego, Cardozo, Dario & Faivovich, Julián, 2008, Advertisement call and female sexual cycle in Uruguayan populations of Physalaemus henselii (Anura, Leiuperidae), Zootaxa 1927 (2), pp. 1-66 : 16-17

Hypsiboas punctatus rubrolineatus (B. Lutz)

Figs. 2B and 3F

External morphology.— Lot MLP DB 4548, Figs. 6C and 6D. Body depressed (BMH/BMW = 0.81 ± 0.03); little longer than one third of total length (BL/TL = 0.35 ± 0.01); body shape oval in dorsal view, widest at spiracle level. In lateral view, ventral contour of body flat in gular and concave in branchial regions, slightly convex in abdominal region. Dorsal contour of body slightly convex from the nostrils to beginning of dorsal fin. Snout rounded in dorsal and lateral views. Nostrils oval, with slightly elevated marginal rim and a rounded projection in medial margin; nostrils dorsolaterally located (EN/BWN = 0.57 ± 0.03), placed in a depression, closer to eyes than to the tip of snout (FN/END = 1.37 ± 0.30), visible in dorsal and lateral views. Eyes large (E/BWE = 0.23 ± 0.03), dorsally positioned (EO/BWE = 0.70 ± 0.04) and dorsolaterally directed, not visible in ventral view. Spiracle single, lateral and sinistral, its inner wall fused to body except for its distal end; its opening oval, elevated, with diameter smaller than or equal to tube diameter, located in posterior third of body (RSD/BL = 0.71 ± 0.03), visible in dorsal and lateral views. Lateral line system visible. Intestinal assa located at the centre of abdominal region. Vent tube starts at midline, at posterior end of body, reaching free margin of lower fin, opening dextral. Tail large (TaL/TL = 0.65 ± 0.01), with both fins higher than body height (MTH/ BMH = 1.12 ± 0.03). Dorsal fin originates at tail-body junction. Ventral fin origin concealed by vent tube. Dorsal fin contour slightly convex; ventral fin contour almost flat, both fins tapering to tip of tail in last third. Tail axis straight, end acute; tail musculature reaching tail tip. Oral disc ( Figs. 8F and 9D) ventral, small (OD/ BMW = 0.46 ± 0.02, disc measured folded) with a well marked infraangular constriction on each side. Marginal papillae simple; those at anterior lip short and blunt, while the ones at posterior lip longer and thinner, with pointed tip. Dorsal gap present, small (DG/OD = 0.29 ± 0.11). Row of marginal papillae single or biserially disposed in angular and infraangular regions; some infraangular submarginal papillae present, shorter and wider than marginal ones. Upper jaw sheath slightly convex in the middle and concave laterally, pigmented in distal third and finely serrated. Lower jaw sheath with V-shaped free margin, pigmented in distal ¼, finely serrated. Labial tooth row formula 2(2)/4(1). A1 bent with an angle directed to the front. P4 located very close to papillae of posterior border of oral disc, with its labial teeth smaller than other ones. Tooth of all rows spatulate and concave, bearing 8–10 well-marked distal cusps ( Fig. 10E).

Variation.— One tadpole (stage 28) has one submarginal papilla on each side of oral disc, bearing labial teeth; P4 fragmented. Another one (stage 29) with some short and conical papillae making a double row in anterior lip, row of marginal papillae double at angular and infraangular regions, while row is single and discontinuous at posterior margin of oral disc. P4 well developed and continuous, with labial teeth smaller than the other ones. At the infraangular regions there are some submarginal papillae and some flaps with labial teeth. In another specimen (stage 36) there is a double fold with papillae on both sides of the rostral gap, and P4 has multiple interruptions. One premetamorph (stage 41) has double or multiple rows of papillae in the infraangular regions and some submarginal papillae, one bearing labial teeth. Row of papillae in the posterior lip discontinuous and most of P4 is lost due to the metamorphosis.

Coloration in preservative.— Body light brown in dorsal and lateral views, with fine melanophores. Inner margin of nostrils dark brown. Abdomen dark brown. Caudal musculature little pigmented with a marbled pattern, darker in dorsal view, unpigmented in ventral view. Dorsal fin translucent with dark flecks. Ventral fin translucent, with some melanophores in the last third.

Oral cavity morphology.— ( Fig. 12B and 14B).

Buccal roof: Prenarial arena with 20 blunt pustules and a clear transversal crest. The pustules are arranged surrounding the crest. Choanae transversely oriented, with anteromedial and rounded vacuities, posterior margins forming the narial valves, and both margins undulated by the presence of small prenarial pustules, in particular the anterior one. There are about up to 20 pustules, 11 short and simple papillae, and 8 long and bifid papillae on the postnarial arena. The series of longest papillae are arranged forming an arch between the lateral ridge papillae. Each square-shaped lateral ridge papilla possesses 7 projections, some of them longer, on the free margin. The tall, distally narrow but proximally wide square-shaped median ridge presents 8 short undulations on its free margin, lateral borders free of undulations and one short papilla at each side of the base. BRA not defined; there are approximately 264 pustules, and no more than 2 very short and conical papillae on central region of the buccal roof. Posterior area of the roof with secretory pits and dorsal velum bearing lobated margin.

Buccal floor: Infralabial papillae on infrarostral cartilages absent. There are two long and digitiform infralabial papillae placed at the level of cartilago meckeli (not figured). The lingual anlage bears 2 long and conical lingual papillae. Buccal pockets mostly transversal. Prepocket area with 22 long and ramified papillae, 10 short conical papillae and 48 pustules. There are 12 long and conical papillae, 32 short and conical papillae and about 120 pustules on the BFA. The papillae are not arranged in a V-shaped pattern. There is a flap (that resembles the lateral ridges of the roof) bearing 3 long projections on its free end and placed posterior to the medial flange of the pocket. The ventral velum has a well-marked median notch, three few-marked projections at each side on the posterior margin and many secretory pits.