This taxon is Not Recognised as a species by BirdLife International.
Gymnobucco bonapartei and G. cinereiceps (del Hoyo and Collar 2014) were previously lumped as G. bonapartei following Sibley and Monroe (1990, 1993).
BirdLife International (2016) Species factsheet: Gymnobucco bonapartei. Downloaded from http://www.birdlife.org on 03/12/2016. Recommended citation for factsheets for more than one species: BirdLife International (2016) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 03/12/2016.