Melanophryniscus pachyrhynus (Miranda-Ribeiro 1920)

Diagnosis A large species of the Melanophryniscus tumifrons species group (snout-vent length = 18.3?35.6 mm; mean = 26.4 ± 3.6 mm; n = 25) differs from other species of the group by the following combination of characters: (1) presence of small tubercles on dorsum and venter; (2) frontal tumefaction extending from between the eyes to near half length of upper eyelids; (3) tumefaction unique, with conic granulations and a light central longitudinal sulcus; (4) in life, ventral color pattern of reticulated orange, vestigial black reticulated spot on gular region, and large trapezoidal red spot on femoral region.

Present in the municipalities of São Lourenço do Sul (type locality), Porto Alegre, São Jerônimo, Dom Feliciano, and Caçapava do Sul, State of Rio Grande do Sul, Brazil, and Cuchilla de Mangrullo, Department of Cerro Largo, Uruguay.

Description of lectotype General aspect robust, bufonoid. Head broader than long; head width nearly one third of snout-vent length; head lacking cranial crests; snout short, projecting slightly beyond anterior margin of mouth, rounded in dorsal view and vertical in lateral view; a prominent, rounded protuberance on dorsal aspect of snout, extending between the eyes to a point near the mid length of upper eyelid; in lateral view, snout protuberance is 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, at tip of snout, directed anteriorly; internarinal distance nearly equals upper eyelid width and approximately half of interorbital distance; interorbital distance nearly twice upper eyelid width; eye diameter larger than internarinal distance, eye to nostril distance, and upper eyelid width, and about 75% interoribital distance; tympanum concealed; vocal slits present; tongue rounded, much longer than wide, with posterior margin free; choanae small, rounded, largely separated. Arms slender, lacking ulnar folds; axillary membrane absent. Hands currently damaged, with fingers short; length of fingers from shortest to largest, II

DD. Data Deficient.