8 sp., see text Osteopilus is a genus of frogs in the family Hylidae.

These species have a bony co-ossification on the skull resulting in a casque, hence its name ‘bone-cap’, from osteo- (‘bone’) and the Greek pilos (πῖλος, ‘felt cap’).

[1] Color varies between uniform brown, brown-gray, or olive with darker markings or marbled with greens, grays or brown, making a distinct pattern.

Their natural range includes the Greater Antilles (except Puerto Rico) and the Bahamas, but O. septentrionalis has also been introduced to the Lesser Antilles, Hawaii and Florida, USA.

Eight species are recognized in this genus:[2] This Hylidae-related article is a stub.