Melanophryniscus tumifrons (Boulenger 1905)

Diagnosis A medium sized species of the M. tumifrons group, diagnosed by the following combination of characters: (1) snout-vent length 23.0-25.3mm in males, 29.9mm in female; (2) head slightly broader than long, with a prominent, rounded protuberance above snout, extending between the eyes to near mid length of upper eyelid; (3) skin on dorsal and lateral surfaces of body largely covered by spinulose warts; (4) foot without tumefaction on metatarsus; (5) ground color of dorsum and flanks blackish brown; (6) ventral surfaces of hands, feet, and arms whitish cream; (7) three spots on chin and throat (mental and subarticular), and a large whitish cream blotch covering the lower belly and the lower side of the thighs; (8) dorsal surfaces of legs dark brown.

State of Rio Grande do Sul, Brazil.

Description of the holotype General aspect robust, bufonoid. Head slightly broader than long; head width nearly one third of snout-vent length; head lacking cranial crests; snout short, slightly projecting beyond anterior margin of mouth, rounded in dorsal view and vertical in lateral view; a prominent, rounded protuberance above snout, extending between eyes to a point near the mid length of upper eyelid; in lateral view, snout protuberance raised above the level of upper eyelid; an inconspicuous longitudinal sulcus bisects the snout protuberance; canthus rostralis rounded due to snout protuberance; loreal region slightly concave, vertical; nostrils very small, situated at tip of snout, directed anteriorly; internarinal distance slightly less than upper eyelid width and approximately half interorbital distance; upper eyelid width approximately 60% of interorbital distance; eye diameter greater than internarinal distance, eye to nostril distance, and upper eyelid width, and about 75% of interorbital distance; tympanum concealed; tongue rounded, much longer than wide, with posterior margin free; choanae small, rounded, largely separated. Arms slender, lacking ulnar folds; axillary membrane absent. Hand with fingers moderately long; length of fingers from shortest to largest, I

LC. Least Concern. Must be reevaluated.