Temporal range: Miocene-Holocene 15–0 Ma

Possible Paleocene range

Greater rhea, Rhea americana
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Clade: Notopalaeognathae
Order: Rheiformes
Forbes, 1884
Family: Rheidae
Bonaparte, 1849[1]
Type species
Rhea americana
Linnaeus, 1758
  • Opisthodactylidae
  • Rheidae

Rheidae is a family of flightless ratite birds which first unambiguously appeared during the Miocene epoch. It is today represented by the sole living genus Rhea, but also contains several extinct genera.[2]


Rheiformes Forbes 1884[3][4][5][6]


  1. Brands, Sheila (August 14, 2008). "Systema Naturae 2000 / Classification, Family Rheidae". Project: The Taxonomicon. Retrieved Feb 4, 2009.
  2. Mayr, G. (2009). Paleogene fossil birds. Springer.
  3. Haaramo, Mikko (2007). "PALEOGNATHIA - paleognathous modern birds". Mikko's Phylogeny Archive. Retrieved 30 December 2015.
  4. "Taxonomic lists- Aves". Paleofile.com (net, info). Retrieved 30 December 2015.
  5. "Part 7- Vertebrates". Collection of genus-group names in a systematic arrangement. Retrieved 30 June 2016.
  6. Çınar, Ümüt (November 2015). "01 → Pᴀʟᴇᴏɢɴᴀᴛʜᴀᴇ : Sᴛʀᴜᴛʜɪᴏɴɪfᴏʀᴍᴇs, Rʜᴇɪfᴏʀᴍᴇs, Cᴀsᴜᴀʀɪɪfᴏʀᴍᴇs, Aᴘᴛᴇʀʏɢɪfᴏʀᴍᴇs, Aᴇᴘʏᴏʀɴɪᴛʜɪfᴏʀᴍᴇs, Dɪɴᴏʀɴɪᴛʜɪfᴏʀᴍᴇs, Lɪᴛʜᴏʀɴɪᴛʜɪfᴏʀᴍᴇs, Tɪɴᴀᴍɪfᴏʀᴍᴇs & Rᴇfᴇʀᴇɴᴄᴇs". English Names of Birds. Retrieved 30 December 2015.
  7. H. Alvarenga, Diogenornis fragilis Alvarenga, 1985, restudied: a South American ratite closely related to Casuariidae, 2010
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