Bioacoustics of Oreolalax yanyuanensis

Holotype description (Fig. 3 ). Body size moderate ( SVL 47.4 mm ). Head width greater than length ( HW 17.6 mm , HL 16.2 mm ); maxillary teeth developed, without vomerine teeth or acoustic sac; snout bluntly rounded in dorsal view, slightly projecting over lower jaw, longer than eye diameter ( SL 6.3 mm , ED 5.9 mm ); canthus rostralis indistinct, interorbital distance ( IOD 5.0 mm) wider than internarial distance ( IND 3.5 mm ), distinctly larger than upper eyelid ( UEW 3.0 mm); nostrils oval, closer to tip of snout than eyes ( EN 3.1 mm , NS 3.0 mm); no tympanic membrane; supratympanic fold broad; tongue moderately broad, notched behind; pupil vertical. Fingers moderate, relative finger lengths: I <II <IV < III ; finger tips slightly dilated; subarticular tubercles absent; inner palmar tubercle large, nearly rounded, outer palmer tubercle small, oval, completely separated. Hindlimbs relatively long, length 177 % of body length; shank length subequal to thigh length, slightly shorter than foot length ( THL 23.4 mm , TL 23.8 mm , FL 24.4 mm ); heels partially overlap when thighs are positioned at right angles to the body and tibia-tarsal articulation reaches the middle eye when leg stretched; toes 1 / 3 webbed with distinct fringes; inner metatarsal tubercle long oval, small. In life, dorsal body and head rough, back with moderate sparse granules, relatively small warts on head; with dark-brown triangular between eyes; dorsal arms and hindlimbs with small granules and bumps; distinct warts cover the fold and posterior of snout. Ventral skin smooth; pectoral glands flat; pectoral glands evident, chest spines and finger spines not visible; femoral glands slightly swollen, distinct on posterior thigh. Small verrucous granules around the anus. Large brown markings on dorsum, dark brown triangular pattern between eyes; large markings dorsum brown; ventral skin medium yellow, with scattered little dark speckling; supratympanic fold dark brown; lateral head and flanks brown with dark patches; throat mixed pink and orange yellow, margin with small beige warts; chest pink and the pectoral glands medium yellow; forelimbs covered with black irregular spots; dorsal limbs yellowish-brown, the spots and stripes of dorsal upper arms and tibiotarsal articulation black; ventral arms, thigh, tibia medium yellow with flesh marking; upper iris light orange yellow, lower iris creamy white, both parts embedded black mesh lines. In preservative (75 % ethanol), dorsal body and head dark grey; irregular spots in forelimbs, black longitudinal stripes on hindlimbs; ventral surface beige, throat and arms beige white; with grayish-brown speckling; mandibular margin warts white; pectoral glands and ventral of the hindlimb beige yellow, scattered black spots; hand and feet dark grey, finger tips and palms grayish-white, inner metatarsal tubercle grey; lateral grey on snout and undereye, patches black; skins beneath supratympanic fold dark grey, flanks grey, covered with creamy white warts, black spots around the edges of warts. Perianal warts and femoral gland creamy-white (Fig. 4 ).