Kompsornis (meaning "elegant bird") is an extinct genus of avialan dinosaurs that lived during the Early Cretaceous period of China. The type and only known species is Kompsornis longicaudus; the specific name means "long-tailed". It is known from only a single fossil specimen from the Jiufotang Formation. Kompsornis was closely related to the well-known Jeholornis, another long-tailed avialan from China, but differs from it in features of its skeleton, particularly the fusion and growth rate of its bones. Like other jeholornithiforms, Kompsornis was a long-tailed avialan with long wings and p
Kompsornis (meaning "elegant bird") is an extinct genus of avialan dinosaurs that lived during the Early Cretaceous period of China. The type and only known species is Kompsornis longicaudus; the specific name means "long-tailed". It is known from only a single fossil specimen from the Jiufotang Formation. Kompsornis was closely related to the well-known Jeholornis, another long-tailed avialan from China, but differs from it in features of its skeleton, particularly the fusion and growth rate of its bones. Like other jeholornithiforms, Kompsornis was a long-tailed avialan with long wings and possessed little or no teeth, with none identified in the single specimen of Kompsornis.
==Classification== Kompsornis was described and named by Wang and colleagues in 2020 from the sole specimen AGB-6997, an articulated complete skeleton preserved on a single slab, and was recognised as a jeholornithiform avialan. Their description included a comprehensive comparison between Kompsornis and the type specimens of other named jeholornithiform species, including all species of Jeholornis, Shenzhouraptor sinensis, Dalianraptor cuhe and the possible euavialan Jixiangornis orientalis. They concluded that Kompsornis was a distinct species from all other jeholornithiform species, and that they all represented valid species except for Dalianraptor, which was determined to be an artificial forgery of different specimens and lacking any diagnostic characteristics.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).