Hyloxalus infraguttatus H. elachyhistus Hyloxalus fuliginosus H. bocagei

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(1) SVL, males 16.1-22.4, n = 26; females, 19.1-25.9 (x = 22.5; n = 38); (2) disc on Finger III expanded; (3) Finger I shorter or about equal to length of Finger II; (4) fringe present or absent on Finger II; (5) disc on Toe IV expanded; (6) fringe present or absent on Toe IV; (7) outer tarsal fold present or absent; (8) toe webbing formula I2—2(2 )II1 —3III2 —4IV4—3V; (9) dorsolateral stripe absent; (10) oblique lateral stripe usually absent; when present, extending to eye, sometimes short, constricted or broken at scapular level; (11) ventrolateral stripe generally present; (12) white spotted band on gular-chest region; (13) white spots on abdomen in both sexes, throat white spotted in females, uniform gray in males; (14) Finger III not swollen in males; (15) testes white (Coloma, 1995).Colostethus awa is compared with those species that have basal webbing, an oblique lateral stripe extending from the eye to the groin, and discrete dark marks on gular-chest region (C. infraguttatus and C. elachyhistus ). Colostethus awa is distinguished from both by having an interrupted, oblique lateral stripe at the scapular level or by lacking the stripe. Colostethus awa also is compared with those species having a short oblique lateral stripe and webbing between the toes (C. bocagei and C. fuliginosus ). It is distinguished from C. fuliginosus by having discrete marks on gular-chest region and from C. bocagei by having a spotted or marbled pattern ventrally and less webbing between the toes.

Description of holotype.—Female, 22.0 mm in SVL; body moderately robust; head longer than wide; head length 38.6% SVL; head width 35.9% SVL; snout bluntly rounded in dorsal view, truncate in profile; loreal region concave; nostrils slightly protuberant laterally; eye-nostril distance half length of eye; supratympanic fold inconspicuous, obscuring posterodorsal part of tympanum; tympanum diameter 45.6% length of eye. Forelimbs moderately long; Finger I slightly shorter than Finger II; fingers unwebbed with lateral fringes poorly developed; terminal discs expanded; subarticular tubercles large, round; palmar tubercle large, round, elevated; thenar tubercle moderately rounded; hind limbs moderately robust; tibia length 50.9% SVL; foot length 49.1% SVL; outer tarsal fold absent; inner tarsal fold sigmoid on distal half of tarsus; outer metatarsal tubercle round, half size of elliptical inner metatarsal tubercle; toes webbed with narrow lateral fringes; terminal discs expanded, about twice width of digits; subarticular tubercles small, round; supernumerary tubercles absent.Skin of dorsum, flanks, and venter smooth; anal opening directed posteroventrally at midlevel of thighs; anal flap moderately long; tongue narrowly triangular, shallow distally, free posteriorly for approximately half of its length (Coloma, 1995).

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