Neornithes are the most recent common ancestor of all living birds and all their descendants. There are about 9,000 to 10,000 known living species in the world.

…birds, assigned to the infraclass Neornithes, or Carinata. Living alongside Hesperornis and other Odontornithes was a group of flying birds that included Ichthyornis and Apatornis . Although not related to gulls, these birds resembled them superficially and may well have been their ecological counterparts.

All modern birds lie within the crown group Aves (alternately Neornithes), which has two subdivisions: the Palaeognathae, which includes the flightless ratites (such as the ostriches) and the weak-flying tinamous, and the extremely diverse Neognathae, containing all other birds. [54]

2025年2月23日 · Neornithes. A taxonomic clade within the subclass Aves – all modern birds, characterized by many adaptations for flight, such as a four-chambered heart and feathers, and differentiated from other, older birds by having a beak with no teeth.

The list of species of Neornithes subclass Birds are a group of warm-blooded vertebrates constituting the class Aves , characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a …

Neornithes includes all extant birds. The earliest divergence within Neornithes is between Paleognathae (ratites and tinamous) and Neognathae which includes the two primary taxa Galloanserae and Neoaves (see Groth and Barrowclough 1999, Garcia-Moreno et al. 2003, Cracraft et al. 2004, Edwards et al. 2005)

Birds (Aves) are a group of endothermic vertebrates, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton. Birds live worldwide and range in size from the 5 cm (2 in) bee hummingbird to the 2.75 m (9 ft) ostrich. They rank as the class of tetrapods with the most …

Neornithes was originally proposed as a replacement for Ornithurae by Gadow in 1892 and 1893. Gauthier and de Queiroz, therefore, consider Neornithes a junior synonym of Ornithurae, [ 4 ] though many other scientists use Neornithes to refer to the much more restrictive crown group consisting only of modern birds (a group for which Gauthier uses ...

2024年12月8日 · Higher-order phylogeny of modern birds (Theropoda, Aves: Neornithes) based on comparative anatomy. II. Analysis and discussion. Zoological Journal of the Linnean Society 149(1): 1–95. DOI: 10.1111/j.1096-3642.2006.00293.x PMC: 2517308. PMID: 18784798. Reference page.

2020年3月18日 · By any measure, crown birds (Neornithes) are among the most diverse and conspicuous of the extant tetrapods, yet their early evolutionary history is poorly understood.