Chirixalus nongkhorensis (Cochran)

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 : 142

Chirixalus nongkhorensis (Cochran)

Material examined. – Pichrada : FMNH 263094-97 , Bou Sraa Village, 12°32'05"N 107°25'55"E, 700 m elev., 14 Jun.2000 ; FMNH 263098-101 , deciduous dipterocarp forest with grassy understorey, near 12°31'38"N 107°33'19"E, 600 m elev., 19 Jun.2000 .

Remarks. – An adult female (SVL 31.7) and seven adult males (SVL 21.2 – 25.5, mean ± SD 23.9 ± 1.5, N = 7) agree with Cochran’s (1927) original description. These have the two outer fingers appearing to be opposable to the two inner ones; webbing at the base of the two outer fingers; interorbital distance much greater than width of upper eyelid; dorsum brownish with irregular darker markings; and upper surface of hindlimb with dark spots but no complete crossbars.

Rokhlong Stream, near 12°18'35.3"N 107°04'28.0"E, 500 m elev., 12 Dec.2003.

Pichrada : FMNH 262637-41 , 262643-50 , Phnom Nam Lyr Mountain, evergreen mixed with deciduous and bamboo forest, near 12°32'16"N 107°32'00"E, 600-700 m elev., 16-21 Jun.2000 ; FMNH 262642 , gallery evergreen forest along large stream, near 12°31'18"N 107°33'13"E, 600 m elev., 19 Jun.2000 .

Remarks. – Fifteen males (SVL 54.5 – 63.6, mean ± SD 59.5 ± 3.2, N = 15) and three females (SVL 70.5 – 79.4, mean ± SD 74.6 ± 4.5, N = 3) agree with Smith’s (1924) original description and Inger et al.’s (1999) expanded description of the species. Males have a snout gently sloping in profile to a sharp point projecting beyond the lower jaw, and females have a rounded snout in profile that is not sloping or projecting ( Inger et al. 1999). The finger discs are rounded and those of the outer fingers larger than the tympanum, webbing extends to the distal edge of the subarticular tubercle of the first finger and to the discs of the outer three fingers, the toes are webbed to the base of discs, and a low, oval inner but no outer metatarsal tubercle is present. Most of the specimens have two or three small papillae on each side just above the anus, and four to six long white tubercles, rarely fused at the base, below the anus.

A juvenile (FMNH 262783, SVL 14.8) is grayish-white with large black spots on the dorsum with dark bars on the limbs, and fully agrees with the description of R. notater , a species described by Smith from a single metamorph in the same publication as R. annamensis . Orlov et al. (2002) also noted the similarity of juvenile R. annamensis with R. notater . We treat Rhacophorus notater as a junior synonym of R. annamensis .

In O’Rang, adults were taken at night on tree branches 2.5- 4 m above the ground, and the juvenile was taken during the day (1550 hrs.) on a forest trail, all near large waterfalls. In Pichrada, specimens were taken at night on vegetation, tree branches, roots and rocks over small streams and seeps. There in June, adults were calling, a foam nest was hanging over a small seep from tree leaves on the same branch where FMNH Specimens were collected on vegetation at the edge of two ponds, one natural and the other formed by water filling a bomb crater.

This is the first report of the species from Cambodia.