Cycloramphus mirandaribeiroi Heyer 1983

Diagnosis A large species of Cycloramphus (males 49-61 mm, females 62-69 mm snout-vent length) with toe webbing and distinct black and/or white dorsal tubercles and lack distinct thigh spots.

Know only from a few localities in the Serra do Mar in the state of Paraná, Brazil, from 50-150m asl.

Description of holotype Snout rounded from above and in profile; canthus rostralis indistinct; loreal slightly concave in cross section; tympanum hidden; vomerine teeth in slightly obtuse angulate series, in close proximity medially, lying between and posterior to choanae; vocal fold present, not opening to a pouch; second finger just longer than first; outer metacarpal tubercle large, rounded with anterior projection, inner metacarpal tubercle ovoid, separated from thumb subarticular tubercle by less than diameter of subarticular tubercle; thumbs lacking asperities; dorsal texture of low relief warts bearing shagreen and white tipped tubercles, warts not aligned; indistinct supratympanic fold; inguinal gland large, disk-shaped, diameter about 1/3 femur length; venter weakly granulate; toe tips expanded into small ungrooved disks just wider than digit; toes fringed, webbed; toe subarticular tubercles moderate; outer rounded metatarsal tubercle smaller than ovoid inner metatarsal tubercle; no tarsal or metatarsal folds; posterior surface of tarsus with shagreen and small tubercles; sole of foot with fine shagreen. Measurements (in mm): snout-vent length 60.2, head length 25.3, head width 27.0, eye-nostril distance 6.1, eye-eye distance 12.6, femur 30.3, tibia 29.7, foot 31.3 mm. Dorsum uniform with light spot in middle of back and light interorbital bar; upper lip with faint light stripes from under eye to edge of lip; upper limbs faintly barred; venter dark brownish gray with small distinct light spots; posterior surface of thigh dark with contrasting light distinct spots. Adult Specimen Definition Based in 11 specimens. Thumbs lacking asperities; snout rounded or sloping in profile, lip flared or not; dorsal pattern uniform; posterior surface of thigh usually with large distinct light spots, rarely mottled; light spots under eyes, on belly and on posterior face of thigh yellow in life; dorsal texture of warts with shagreen and white tipped tubercles, warts often aligned into irregular or regular short rows; foot webbed; male snout-vent length 58.2 ± 4.5, maximum 63.8 mm, females 66.5 ± 2.7, maximum 68.6 mm, females larger than males ( t = 3.3, P = .009) ; male head length/ snout-vent length ratio 0.40 ± .01, female 0.41 ± .01; male head width/ SVL ratio 0.43 ± .01, female 0.44 ± .02; male eye-nostril distance/ snout-vent length ratio 0.10 ± .01, female 0.10 ± .01; male eye-eye distance/snout-vent length ratio 0.20 ± .01, female 0.20 ± .01; male femur/ snout-vent length ratio 0.49 ± .02, female 0.48 ± .02; male tibia/ snout-vent length ratio 0.49 ± .02, female 0.50 ± .02; male foot/snout-vent length ratio 0.51 ± .03, female 0.51 ± .02.

DD. Data Deficient. Cited how "dados insuficientes" na Lista Vermelha do Estado do Paraná.

Cycloramphus mirandaribeiroi is a species of frog in the family Cycloramphidae. It is endemic to Brazil. Its natural habitats are subtropical or tropical moist lowland forests and rivers. Its population is in decline.