[1] Both males and females grow to about 24 mm (0.9 in) in snout–vent length,[3] although they are often smaller.

Coloration is chocolate brown with two greenish dorsolateral bands.

[3] Guibemantis albolineatus is an arboreal frog inhabiting pristine rainforest at elevations of 300–1,500 m (980–4,920 ft) above sea level.

The eggs are deposited in leaf axils, often those of Pandanus, and the tadpoles develop in this same microhabitat.

It is present in Andohahela and Marojejy National Parks, and probably in other protected areas too.