Cycloramphus lutzorum Heyer 1983

Diagnosis Males snout-vent length 43.5 ± 2.0, maximum 46.8 mm, female 48.8 ± 5.5, maximum 58.0 mm, females larges than males. Thumbs lacking asperities; snout rounded or vertically sloping in profile, lip flared or not; posterior surface of thigh almost always with distinct large light spots, rarely uniform or mottled; dorsal texture of high relief warts bearing shagreen and black and/or white tubercles, warts often aligned into irregular or regular short rows.

Occurs in the Serra do Mar in the states of Paraná, São Paulo and Rio de Janeiro, in southern Brazil, at 500-900m asl.

Description of Holotype Snout weakly semicircular from above, rounded in profile; canthus rostralis indistinct; loreal region slightly concave; tympanum hidden; vomerine teeth in short transverse series, separated by less than length of one series, lying between and posterior to choanae; vocal slits present, vocal sac internal; first and second fingers about equal lengths; outer metacarpal tubercle large, rounded with anterior projection, inner metacarpal tubercle ovoid, separated from thumb subarticular tubercle by just less than diameter of subarticular tubercle; thumbs lacking asperities; dorsal texture of high relief warts, shagreened, each wart bearing one or more black tipped tubercles; warts aligned into more or less regular short rows; supratympanic fold present; inguinal gland moderate sized, disk shaped, diameter 1/4 - 1/3 femur length; venter weakly granular; toe tips just wider than digit width; toes fringed, webbed; toe subarticular tubercles moderate; outer rounded metatarsal tubercle smaller than inner ovoid metatarsal tubercle; indistinct tarsal and metatarsal folds; lower tarsus covered with small, low, rounded brown tubercles; sole of foot with small, low, tubercles on outer half, smooth on inner half. Measurements (in mm): snout-vent lenght 45.1, head length 18.6, head width 19.2, eye-nostril distance 4.5, eye-eye distance 8.7, femur 22.1, tibia 22.1, foot 23.3 mm. Coloration in preservative: Dorsum uniform; upper lip with faint light stripes from under eye to edge of lip; upper limbs barred; chin dark grey with distinct light spots, belly and limbs light gray with distinct light spots; posterior surface of thigh dark with distinct, large light spots.

DD. Data Deficient.

Cycloramphus lutzorum is a species of frog in the family Cycloramphidae. It is endemic to Brazil. Its natural habitats are subtropical or tropical moist lowland forest, rivers, and rocky areas. It is threatened by habitat loss.