(dated) A taxonomic subclass within the classAves — Birds having a pronounced keel-like sternum, to which muscles used in flight attach.
A taxonomic clade within the classAves — Birds descended from a certain common ancestral type of bird, possibly having a keel-like sternum and other bone-structure characteristics.
Origin of carinatae
From Latincarinatus (“shaped like a keel, having a keel-shaped ridge”)
Carinatae Sentence Examples
Society, 18 74, p. 594) to be "lost," whereas the clavicles, which in most birds unite to form that bone, are present, though they do not meet, while in like manner the bird has been declared (op. cit., 1867, p. 624, note) to furnish among the Carinatae " the only apparent exception to the presence of a keel" to the sternum.
In other Carinatae, e.g.
The fourteen orders of the Carinatae are further congregated into four " Legions ".
The Ratitae branched off, probably during the Eocene period, from that still indifferent stock which gave rise to the Tinami+Galli+Gruiformes, when the members of this stock were still in possession of those archaic characters which distinguish Ratitae from Carinatae.
It follows that new groups of Ratitae can no longer be developed since there are no Carinatae living which still retain so many low characters, e.g.