Discosura is a genus of South and Central American hummingbirds in the family Trochilidae. The thorntails are sometimes placed in the genus Popelairia (Reichenbach, 1854), leaving Discosura for the racket-tipped thorntail. On the contrary, some have argued for merging this genus into Lophornis, which they overall resemble, except for the highly modified tail-feathers of the males.
^Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (August 2024). "Hummingbirds". IOC World Bird List Version 14.2. International Ornithologists' Union. Retrieved 30 August 2024.