A small arboreal agamiddistinguished from Cophotis ceylanica by having a prehensile tail, less well-developed gular sac, non-carinate, granular mid-gular scales, smoothly carinate, obtuse chest scales, triangular ventral scales, unequal, very large, smooth or shortly keeled, strongly imbricate, pointing backwards and downwards-dorsal scales, nuchal crest of male composed of similar spines separated from one another, crest of female much lower (Manamendra-Arachchi, De Silva & Amarasinghe, 2006).

Body color is mainly yellowish green, with lighter and darker markings. A greenish-yellow stripe along the upper lip extending on to the shoulder always present, throat of male usually with a longitudinal brown streaks; rest of parts light brown (Manamendra-Arachchi, De Silva & Amarasinghe, 2006).

Cophotis dumbaraerecorded only from Knuckles hills above 1400 m. Riverstone, Dotalugala, Kobonilagala, Rangala, Kalupahana This species is endemic to Sri Lanka (Manamendra-Arachchi, De Silva & Amarasinghe, 2006).

Conservation status: Critically Endangered (IUCN, 2007).