A large phylogenetic study of the woodpecker family Picidae published in 2017 found that the genus was paraphyletic. The olive-backed woodpecker (Dinopium rafflesii) is more closely related to the pale-headed woodpecker (Gecinulus grantia) than it is to other members of the genus Dinopium.[5]
Species
As presently constituted, the genus contains the following 5 species:[6]
↑Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (2020). "Woodpeckers". IOC World Bird List Version 10.1. International Ornithologists' Union. Retrieved 17 May 2020.