DiagnosisA medium sized species belonging to the M. tumifrons group and diagnosed by the following combination of characters: (1) snout-vent length 24.0-26.0mm in males, 27.7-29.5mm in females; (2) head broader than long, with a prominent, rounded protuberance above snout, extending between the eyes to a point near the middle of the length of the 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, flanks, and venter dark brown; (6) three small pale yellow blotches in the gular region; (7) on the chest, just at the insertion of the arms, belly, ventral surfaces of forearms and thighs, and palmar and plantar surfaces pale yellow; (8) dorsal surfaces of legs dark brown; (9) small pale yellow spot above cloacal opening and at tibiotarsal articulation.