Rheidae/ˈriːɪdiː/ is a
family of flightless
ratite birds which first appeared in the
Paleocene.[2] It is today represented by the sole living
genusRhea, but also contains several extinct genera.[3]
^Agnolin, Federico L. (July 2016) [2017]. "Unexpected diversity of ratites (Aves, Palaeognathae) in the early Cenozoic of South America: Palaeobiogeographical implications". Alcheringa: An Australasian Journal of Palaeontology. 41 (1): 101–111.
doi:
10.1080/03115518.2016.1184898.
ISSN0311-5518.
S2CID132516050.
^Mayr, G. (2009). Paleogene fossil birds. Springer.
^Alvarenga, H. (2010). Diogenornis fragilis (Alvarenga, 1985) restudied: a South American ratite closely related to Casuariidae (Thesis).[full citation needed]