(syn. Gymnobucco Ϯ Grey-throated Barbet G. bonapartei) Gr. ἡλιος hēlios sun, east; genus Bucco Temminck, 1820, barbet; "3. HELIOBUCCO, gen. n. The type of this genus is H. bonapartii, which has always been placed with G. calvus in the genus Gymnobucco. It differs, however, in its feathered crown and feathered ear-coverts." (Shelley 1889).