The genus is named in honour of Angel Alcala, a Filipino biologist who has worked with Southeast Asian amphibians.[1]
Description
Compared to the closely related genera Cornufer and Platymantis, Alcalus have an intermediate body size (based on Alcalus baluensis and A. mariae, males measure 20–37 mm (0.79–1.46 in) and females 26–43 mm (1.0–1.7 in) in snout–vent length). The head is broad. Skin is coarsely textured, shagreened, or ‘wrinkled’ in appearance. The toe discs are widely expanded; inter-digital webbing is extensive. Males have nuptial pads but lack vocal sacs.[1]
^ ab"Ceratobatrachidae". AmphibiaWeb: Information on amphibian biology and conservation. [web application]. Berkeley, California: AmphibiaWeb. 2020. Retrieved 21 June 2020.