12, see text Adelophryne is a genus of frogs in the family Eleutherodactylidae.

[4] The generic name is derived from the Greek words adelos, meaning "unseen, unknown, obscure", and phryne for "toad".

[4] At 7.6–9.1 mm (0.30–0.36 in) in males and 10–11.4 mm (0.39–0.45 in) in females, A. michelin is not only the smallest in the genus,[4] but among the smallest frogs of the Americas, with only a few Brachycephalus species, Eleutherodactylus iberia and E. limbatus being of roughly similar size.

The digits are flattened and have asymmetrically pointed, laterally grooved, elongate discs.

[7] Before this was confirmed for Adelophryne maranguapensis, the relatively large size of the eggs in this genus led many researcher to conclude that direct development was likely to be present.