These species were formerly placed in the genus Amazilia. A molecular phylogenetic study published in 2014 found that Amazilia was polyphyletic.[2] In the revised classification to create monophyletic genera, the white-bellied hummingbird and the green-and-white hummingbird were placed in a new genus Elliotomyia.[1][3][4]
References
^ abGill, Frank; Donsker, David; Rasmussen, Pamela, eds. (July 2020). "Hummingbirds". IOC World Bird List Version 10.2. International Ornithologists' Union. Retrieved 7 January 2020.