Odontophrynus maisuma Rosset 2008

Present in some localities in coastal dune regions of south of Santa Catarina, Rio Grande do Sul States, Brazil and Departments of Canelones, Maldonado, Montevideo and Rocha, Uruguay.

Description of holotype Body stout; head wider than long, its length 89% of its width, 37% of snout-vent length; snout rounded in dorsal profile, truncate, slightly sloping in lateral profile. Canthus rostralis slightly distinct, rounded in dorsal view; loreal region slightly concave. Nostrils elliptic, directed dorsolaterally, and situated at the tip of the snout in lateral profile; internarial distance 33% of interorbital distance, slightly less than eye�nostril distance. Eye large, prominent, 31% of head length, its diameter longer than eye�nostril distance; upper eyelid with distinctly rounded glandular warts, external border of the upper eyelid with a palpebral glandular ridge. Tympanum hidden, not visible externally. Premaxillary and maxillary teeth present; tongue round, approximately half free and notched posteriorly; vomerine teeth in two patches posteromedian to choanae. Vocal sac median, subgular, with black pigmentation; vocal slits present, longitudinal. Skin of dorsum granular, consisting of small granular warts, scattered distributed, all about the same size, and a series of distinct glands, forming a longitudinal interrupted crest on postorbital-parotoid region. No distinct temporal gland. Venter heavily granular. Forelimbs relatively short, stout; a small glandular ridge on posterior surface of forearm. Lengths of fingers: V, III, II, IV; fringes absent; webbing absent. Inner and outer metacarpal tubercles well developed, oval; inner strong; outer divided lengthwise, approximately two times larger than inner; subarticular tubercles well developed, rounded, divided on fingers III and IV; supernumerary tubercles rounded, scattered distributed. Nuptial pad present on thumb. Hind limbs relatively short, stout; lengths of toes: I, II, V, III, IV; tarsal fold present; first subarticular tubercle on first toe enlarged. Inner metatarsal tubercle strong, shovel-like, keratinized; outer metatarsal tubercle small, rounded; subarticular tubercles rounded; few small rounded supernumerary tubercles. Toes webbed, with dermal fringes slightly developed to tip. Measurements of holotype (in mm): snout-vent length 36.7, head length 13.4, head width 15, internarial distance 2.2, interorbital distance 6.6, eye�nostril distance 2.6, upper eyelid length 5.6, eye diameter 4.2, arm length 18.2, femur length 13.7, tibia length 12.8, foot length 23.2, inner metatarsal tubercle length 4.1. Coloration in preservative: Dorsal color of head, body,and extremities uniformly light brown with dark brown blotches. Three distinct pairs of large dark brown blotches on dorsum. The anterior enlarged pair begins on the posterior surface of the upper eyelid, and is associated with the postorbital-parotoid glandular ridge. The second pair of blotches rounded, approximately in the middle of the dorsum; the third pair rounded, small, in the urostyle region. Few small rounded dark brown blotches laterally. Venter uniformly light brown with gular area dark brown. Coloration in life: based on adult males. Dorsal color of head, body and upper surfaces of extremities light brown with large dark brown blotches, with black margins. A greenish-brown tonality on dorsum and sides, scattered red spots located principally on each side of the dorsum, and a well-defined light middorsal stripe. One dark brown band extends approximately from each nostril to the tip of snout, and three dark brown bands on both side of the upper lip, two vertical and one oblique. Two pairs of small, approximately C shaped interorbital dark brown blotches, one pair behind the other. Three pairs of large, dark brown blotches on dorsum, extending dorsolaterally. The anterior pair begins on the posterior surface of the upper eyelid, and is associated with the postorbital-parotoid glandular ridge. The second pair rhomboidal, similar in long that the first, in the middle of the dorsum; the third pair rounded, small, in urostyle region. Few small dark brown blotches, arranged symmetrically on each side of the dorsum. Pupil horizontally elliptical, surrounded by a golden ring; iris gold, marbled with dark brown and showing an intense concentration of pigment in the anterior and posterior borders. Venter whitish, and gular area of males brown with greenish-brown tonality. Variation in color pattern includes the more extension of the first pair of postorbital blotches and the asymmetrical fusion of dorsal and lateral blotches. In one male, postorbital blotches are fused with lateral blotches, and in one female, postorbital blotches are fused with those of the middle of the dorsum. Some specimens show small blotches on urostyle region. One male has the middorsal stripe absent; another male has the middorsal stripe interrupted by a small to medium-sized blotch in the interscapular region. Variation Sexual dimorphism is evident. Males are recognized externally by the presence of nuptial pads on thumb, and black pigmented vocal sac. The range of measurements (in millimeters) of adult male paratypes are (n = 9, mean±SD are given in parentheses): snout-vent length 36.7-40.9 (39.3±1.4), head length 13.6-14.9 (14.3±0.5), head width 15-16.9 (15.8±0.6), internarial distance 2-2.6 (2.3±0.2), interorbital distance 6.1-7.9 (6.8±0.6), eye�nostril distance 2.8-3.2 (3±0.1), upper eyelid length 5-6.7 (5.8±0.5), eye diameter 3.8-5 (4.4±0.4), arm length 17.5-19.8 (18.5±0.8), femur length 13.7-6.4(15.1±0.8), tibia length 12.4-13.6 (13.1±0.4), foot length 23.3-26.7 (24.5±1), inner metatarsal tubercle length 4-4.7 (4.2±0.2). Females are larger than males in most of the measurements. The range of measurements (in millimeters) of adult female paratypes are (n = 2): snout-vent length 42.5-43.6, head length 14.6-15.5, head width 16.7-17.3, internarial distance 2.5-3, interorbital distance 6.5-7, eye�nostril distance 3.2-3.4, upper eyelid length 6-6, eye diameter 4.5-5.2, arm length 19.4-19.8, femur length 14.3-15.3, tibia length 13.8-14.4, foot length 24.1-27, inner metatarsal tubercle length 4.3-4.3. There is some variation in shape and distinctness of the outer metatarsal tubercle, from nearly undifferentiated to small rounded or small oval. Some specimens show a small temporal gland, and others have a more posterior and lateral gland.

NE. Not evaluated.

Odontophrynus maisuma es una especie de anfibios de la familia Odontophrynidae. Es endémica del sur del Brasil y del sudeste del Uruguay.

Odontophrynus maisuma est une espèce d'amphibiens de la famille des Odontophrynidae.

Odontophrynus maisuma é uma espécie de anfíbio da família Odontophrynidae. Pode ser encontrada no Brasil, nos estados de Santa Catarina e Rio Grande do Sul, e no Uruguai.