Agalychnis spurrelli Boulenger (Anura, Hylidae): Variación, distribución y sinonimia

Agalychnis spurrelli Boulenger, 1913 is the earliest available name for a hylid species of Phyllomedusin frogs that inhabit the lowland and pre-montane tropical forests on the Pacific coast, from southern Costa Rica to central-western Ecuador. I present data that support the placement of Agalychnis litodryas Duellman & Trueb, 1967 as a junior synonym of A. spurrelli. Agalychnis spurrelli is a medium-large sized frog with extensive interdigital membrane that is distinguished from other species of the genus Agalychnis by having the flanks and limbs uniformly yellow, orange, pale rose or pale purple, without dark stripes. The dorsum is green, usually with black-bordered pustular white warts.