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...

consists of all modern birds (Neornithes or Aves) with the exception of Palaeognathae (ratites and kin) and Galloanserae (ducks, chickens and kin). Almost...

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...

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

volcanism, and landscape changes. The cladogram below is a phylogeny of Palaeognathae generated by Mitchell (2014) with some clade names after Yuri et al...