Zhangixalus achantharrhena is a species of frog in the family Rhacophoridae. It is endemic to Sumatra (Indonesia) and known from a number of high-elevation localities ranging from Aceh in the northwest to Lampung in the southeast. The specific name achantharrhena, from the Greek nouns akantha (=thorn or prickle) and arrhen (=male), refers to a characteristic of males of this species: skin covered by tiny spicules.
Males grow to 41 mm (1.6 in) and females (based on a single specimen) to 47 mm (1.9 in) in snout–vent length. In males, the snout is sloping in lateral view and acuminate in dorsal view with a slightly spatulate tip. In the female, the snout is more rounded. The tympanum is distinct but its upper edge is hidden by the thick and conspicuous supratympanic fold. The fingers and toes are webbed and bear terminal discs. The dorsum is smooth in the female but finely spiculate in males. Dorsal coloration is bright green with reddish spots (lighter in some specimens). The dorsal surfaces of the digits, dermal appendages on the limbs and above the vent, and the lower lip are yellowish white. The venter and gular region are bright yellow. Webbing between the toes 3–5 is red but green between the other toes and the fingers.
