Yanornithiformes is an order of ornithuromorph dinosaurs from the early Cretaceous Period of China. All known specimens come from the Yixian Formation...

et al. (2006) found that the most primitive known euornithians (the Yanornithiformes) had a mosaic of advanced and primitive features. These species retained...

(primitive tree-dwelling, flying birds) Euornithes (advanced flying birds) †Yanornithiformes (toothed Cretaceous Chinese birds) †Hesperornithes (specialized aquatic...

hongshanornithids were more closely related to songlingornithids (yanornithiformes) than to other early birds, making them part of the same clade. Wang...

the family containing this group is Songlingornithidae. The order Yanornithiformes has been erected to mark their distinctness from other early Ornithurae...

†Songlingornithiformes [Aberratiodontiformes Gong, Hou & Wang 2004; Yanornithiformes Zhou & Zhang 2001; Yixianornithiformes Zhou & Zhang 2006] †Songlingornithidae...

tail feathers. Yixianornis was moderately sized compared to other yanornithiformes, at about the size of a chicken. IVPP V12631 was measured approximately...

Dinosauria Clade: Saurischia Clade: Theropoda Clade: Avialae Clade: †Yanornithiformes Family: †Songlingornithidae Hou, 1997 Type species †Songlingornis linghensis...

Formation  China An Ornithuromorphae Chiappe, Ji, Ji et Norell, 1999, Yanornithiformes Zhou et Zhang, 2001, Yanornithidae Zhou et Zhang, 2001 Yumenornis huangi...

Formation  China An Ornithuromorphae Chiappe, Ji, Ji et Norell, 1999, Yanornithiformes Zhou et Zhang, 2001, Yanornithidae Zhou et Zhang, 2001. The type species...