Avialae ("bird wings") is a clade containing the only living dinosaurs, the birds, and their closest relatives. It is usually defined as all theropod...

troodontids, while the body mass continued to decrease in many forms within Avialae. Fossils show that all the earliest members of Paraves found to date started...

related to them than to Ornithomimus velox. It contains the major subgroups Avialae, Dromaeosauridae, Troodontidae, Oviraptorosauria, and Therizinosauria....

popular reference books as the oldest known bird (member of the group Avialae). Older potential avialans have since been identified, including Anchiornis...

known only from fossils, and assigning them, instead, to the broader group Avialae, on the principle that a clade based on extant species should be limited...

of this article, a 'bird' is considered to be any member of the clade Avialae. Some dinosaur groups which may or may not be true birds are listed below...

the ornithischians, then in the lineage of saurischians including birds (Avialae), and lastly in the therizinosaurians. This would then be an example of...

member of the family Scansoriopterygidae and as a basal member of the clade Avialae; this was confirmed by the subsequent analysis conducted by Hu et al. (2009)...

closer to Avialae than to dromaeosaurines. A large analysis published by Agnolín and Novas (2013) recovered Rahonavis as closer to Avialae than to Dromaeosauridae...

This is an incomplete list that briefly describes vertebrates that were extant during the Campanian, a stage of the Late Cretaceous Period which extended...