Traditionally, Leucopternis contains significantly more species than given here. However, as the genus probably was polyphyletic, moves of species to other genera were proposed and have been accepted by the American Ornithologists' Union's South American Check-list Committee and North American Check-list Committee, except that the South American Committee placed the former L. lacernulatus in the existing genus Buteogallus instead of in a new genus Amadonastur by itself. The other species were placed in the genera Cryptoleucopteryx, Morphnarchus, Pseudastur, and Buteogallus. According to this treatment, the species remaining in Leucopternis are:
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Raposo do Amaral, Miller, Silveira, Bermingham, & Wajntal (2006). Polyphyly of the hawk genera Leucopternis and Buteogallus (Aves, Accipitridae): multiple habitat shifts during the Neotropical buteonine diversification. BMC Evol. Biol. 6: 10
Raposo do Amaral, F. S.; et al. (2009). "Patterns and Processes of Diversification in a Widespread and Ecologically Diverse Avian Group, the Buteonine Hawks (Aves, Accipitridae)". Molecular Phylogenetics and Evolution53 (3): 703–715. doi:10.1016/j.ympev.2009.07.020.