Trimeresurus albolabris Gray, 1842

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 : 152

Trimeresurus albolabris Gray

Material examined. – O’Rang: FMNH 263013 , grass and disturbed evergreen forest along road, 12°19'18.5"N 107°05'53.5"E, 550 m elev., 9 Dec.2003 .

Remarks. – A single male has 11 supralabials; internasals in contact; supraocular narrow, equal in width to about two scales on top of the head, 9 scales separating supraoculars; the vertical eye diameter less than the distance from the ventral edge of eye to ventral edge of upper lip; the side of the head below eyes lighter in colouration than the rest of the head; 21 longitudinal scale rows at midbody; a uniformly yellow (in life) lateral stripe; 163 ventrals; 68 subcaudals; dorsal surface of tail reddish; and hemipenis long, papillose at base. Smith (1943) stated that the first supralabial is “more or less completely united with the nasal,” but in this specimen the first supralabial on both sides is separated from the nasal by a weak suture.

The specimen was taken at night (2000 hrs.) crawling on a dirt road.

Saint Girons (1972a) reported the species from central and southwestern Cambodia.

Trimeresurus macrops Kramer

Material examined. – O’Rang: FMNH 262717 , hilly evergreen forest, waterfall on O Ngeugn Stream, 12°18'50.5"N 107°06'03.4"E, 500 m elev., 11 Dec.2003 ; FMNH 262718 , hilly evergreen forest, O Kamen Stream, near 12°19'35.3"N 107°05'33.4"E, 500 m elev., 1 Nov.2003 ; FMNH 262719 , 262721 , hilly evergreen forest, O Doeung Por Stream, near 12°18'08.4"N 107°03'08.1"E, 500 m elev., 2-6 Nov.2003 ; FMNH 262720 , hilly evergreen forest, O Ronas Stream, 12°17'30.7"N 107°03'06.0"E, 450 m elev., 3 Nov.2003 .

Siem Pang: FMNH 262715-16 , evergreen mixed with bamboo forest, waterfall of O Chhay Stream, tributary of O Chay Stream, 14°15'49.6"N 106°31'46.0"E, 200 m elev., 5 Dec.2003 .

Remarks. – These have short, broad heads; 9-11 supralabials, the first partly fused with the nasal; internasals in contact; the supraocular broad, equal in width to about three scales on top of the head; the vertical eye diameter greater than the distance from the ventral edge of eye to ventral edge of upper lip; 21 longitudinal scale rows at midbody; males with 161- 163 ventrals (mean ± SD 162.2 ± 0.9, N = 4), females with 164-173 ventrals (mean ± SD 170.0 ± 5.2, N = 3); and hemipenis long, papillose at base.

In life, male FMNH 262717 had a reddish-orange eye; baby-blue wash on scales on side of head, especially infralabials; chin scales baby-blue, flanked with white; dark green dorsals; scales of first body scale row on anterior half of body with white marking, those on posterior half of body also having a reddish-brown marking on the ventral edge, forming a ventrolateral stripe; ventrals on anterior 1/3 of body baby-blue, remaining ventrals bright green; and dorsal and lateral surface of tail rusty-red.

Specimens were collected at night (1810-2040 hrs.) on the soil bank, herbaceous plants, bushes, tree roots, and tree branches within 10 m of swift, rocky streams, often near waterfalls. The species was collected together with T. vogeli (see below); for example, FMNH 262717 was captured within 3 m of a T. vogeli (FMNH 263025).

This is the first report of the species from Cambodia.