Pygostylia is a group of avialans which includes the Confuciusornithidae and all of the more advanced species, the Ornithothoraces. The group Pygostylia...
avialans were shortened with the advent of the pygostyle bone in the group Pygostylia. In the late Cretaceous, around 95 million years ago, the ancestor of...
the monophyly of the group, placing them as basal avialans sister to Pygostylia. No phylogenetic definitions for these groups were provided by Zhou and...
Birds evolved from certain feathered theropod dinosaurs, and there is no real dividing line between birds and non-avian dinosaurs except that some of the...
adapted from these later to improve flight performance. The bird clade Pygostylia was named in 1996, by Luis Chiappe, for the presence of this feature and...
Chongmingia is a genus of basal avialan belonging to Pygostylia that lived during the Aptian. It was found in the Jiufotang Formation in Chaoyang, China...
Wellnhoferia to be form a clade sister to the lineage including Jeholornis and Pygostylia, with Microraptoria, Unenlagiinae, and the clade containing Anchiornis...
other phalanges. Confuciusornithidae is the most basal group of the clade Pygostylia, whose members possess a pygostyle, a fused set of caudal vertebrae at...
A.O, Averianov; N.V, Zelenkov (2014). "A Confuciusornithiform (Aves, Pygostylia)-Like Tarsometatarsus from the Early Cretaceous of Siberia and a Discussion...
Omnivoropterygiformes. A study published in 2014 found Balaur to be sister to Pygostylia. An independent analysis using an expanded version of the original data...
that it may actually be more closely related to short-tailed avialans (Pygostylia) than to Jeholornis. Shenzhouraptor sinensis (the name of which is derived...
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