Palaeognathae (/ˌpæliˈɒɡnəθi/; from Ancient Greek παλαιός (palaiós) 'old', and γνάθος (gnáthos) 'jaw') is an infraclass of birds, called paleognaths or...

genus Struthio in the order Struthioniformes, part of the infra-class Palaeognathae, a diverse group of flightless birds also known as ratites that includes...

other around 54 million years ago. Placement of Elephant birds within Palaeognathae, after: The ancestors of elephant birds are thought to have arrived...

is any of a group of mostly flightless birds within the infraclass Palaeognathae. They are mostly large, long-necked, and long-legged, the exception...

al. (2014) with some clade names after Yuri, T. et al. (2013). The Palaeognathae or "old jaws" is one of the two superorders recognized within the taxonomic...

and the flightless ratites, which belong instead to the sister taxon Palaeognathae. There are nearly 10,000 living species of neognaths. The earliest fossils...

description of an embryonic skeleton of the extinct elephant bird, Aepyornis (Palaeognathae: Ratitae)". Journal of Vertebrate Paleontology. 27 (sup4): 1–53. doi:10...

Federico L. (July 2016) [2017]. "Unexpected diversity of ratites (Aves, Palaeognathae) in the early Cenozoic of South America: Palaeobiogeographical implications"...

2014.07.001. Agnolin et al, Unexpected diversity of ratites (Aves, Palaeognathae) in the early Cenozoic of South America: palaeobiogeographical implications...

event 66 million years ago, giving rise to ostriches and relatives (Palaeognathae), waterfowl (Anseriformes), ground-living fowl (Galliformes), and "modern...