Ophryophryne hansi Ohler, 2003

Stuart Ko Sok Thy Neang, Bryan L., 2006, A Collection Of Amphibians And Reptiles From Hilly Eastern Cambodia, Raffles Bulletin of Zoology 54 (1), pp. 129-155 : 135

Ophryophryne hansi Ohler

Material examined. – Siem Pang: FMNH 262777 , bamboo mixed with evergreen forest, O Chay Stream, 14°17'38.7"N 106°36'44.8"E, 370 m elev., 2 Dec.2003 .

Remarks. – A single male (SVL 45.6) closely resembles the holotype (FMNH 252880) and male paratypes (FMNH 252873, 252875, 252878-79, 252884, 252892-93), which we have examined, from Gia Lai Province, Vietnam. The specimen has small tubercles on the side of the head; larger tubercles on the top of the head, upper eyelid, and dorsum; warts on the flank and groin; a distinct supratympanic fold from eye to behind axilla; no skin folds or ridges on the dorsal surface of the body; a dark brown oval nuptial pad on the dorsal and medial surface of the first finger from its base to the articulation and in a small round patch on the dorsal surface of the base of the second finger; the second finger slightly shorter than the fourth finger; the tympanum to eye distance greater than the horizontal diameter of the tympanum; and dark gray colouration in preservative. The Cambodian specimen disagrees with Ohler’s (2003) original description by having the tympanum diameter larger than half (62.5%) of the eye diameter, and is slightly larger than males in the type series (SVL 35.3 – 43.0 mean ± SD 38.8 ± 2.5, N = 7). The specimen illustrated in Figure 2 of Ohler (2003) is not the holotype of O. hansi (FMNH 252880), nor is it referable to this species, but the text description of the holotype matches FMNH 252880.

Comparative material examined: Ophryophryne gerti FMNH 252899, 252901, Gia Lai Province, Vietnam. Ophryophryne hansi FMNH 252880, holotype, Gia Lai Province, Vietnam; FMNH 252873, 252875, 252878-79, 252882, 252884, 252892-93, paratypes, Gia Lai Province, Vietnam. Ophryophryne microstoma FMNH 254250-51, Vinh Phu Province, Vietnam. Additional data on O. gerti and O. microstoma taken from original descriptions ( Boulenger, 1903; Ohler, 2003). Complete data on Ophryophryne pachyproctus taken from original description ( Kou, 1985) and Ohler (2003).

Diagnosis. – An Ophryophryne having males with SVL 45.8- 47.3; tympanum diameter 80% of the eye diameter; second finger shorter than fourth finger; small tubercles containing black spinules on maxilla, mandible, and rear of back; fine, colourless spinules on dorsal surface of tibia and ventral surface of tarsus; strong dorsolateral glandular ridge from above shoulder to level of 4/5 of distance between axilla and groin; large tubercles on rear of back; large warts on flanks; black nuptial pad covering most of dorsal surface of first phalange of second finger.

Description of holotype. – Habitus moderately stocky; head slightly wider than long. Snout truncate in dorsal view, obliquely projecting beyond lower jaw in profile; nostril closer to tip of snout than to eye; canthus rostralis constricted, rounded; lores vertical; diameter of eye slightly greater than length of snout; interorbital distance slightly smaller than width of upper eyelid; single, distinct, pointed supraorbital horn projecting from upper eyelid, about equal in length to distance from nostril to tip of snout; tympanum round, visible, slightly elevated relative to skin of temporal region, diameter smaller than that of the eye, diameter greater than the distance between the tympanum and eye; no pineal ocellus.

Tips of all fingers blunt, slightly swollen near tips; relative finger lengths I <II <IV <III; palmar tubercle indistinct, no subarticular or supernumerary tubercles; no finger webbing. Tips of toes like fingers; relative toe lengths I <II <V <III The specimen was taken at night (1918 hrs.) on a 5 cm diameter rock midstream in a 7 m wide shallow, swift rocky stream.

This is the first report of the genus in Cambodia.

Figures

Fig. 2. Eye of Leptobrachium mouhoti, new species, holotype male (FMNH 262756), in life.