This taxon is Not Recognised as a species by BirdLife International.
Lampornis castaneoventris and L. cinereicauda (del Hoyo and Collar 2014) were previously lumped as L. castaneoventris following SACC (2005), which in turn was previously lumped with L. calolaemus as L. castaneoventris following Sibley and Monroe (1990, 1993).
BirdLife International (2016) Species factsheet: Lampornis castaneoventris. Downloaded from http://www.birdlife.org on 06/12/2016. Recommended citation for factsheets for more than one species: BirdLife International (2016) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 06/12/2016.