Ambiortus is an extinct genus of ornithuromorph dinosaurs. The only known species, Ambiortus dementjevi, lived sometime during the Barremian age between 136.4 and 125 million years ago in the Andaikhudag Formation of Mongolia. It was discovered by Yevgeny Kurochkin in 1982.
Ambiortus is an extinct genus of ornithuromorph dinosaurs. The only known species, Ambiortus dementjevi, lived sometime during the Barremian age between 136.4 and 125 million years ago in the Andaikhudag Formation of Mongolia. It was discovered by Yevgeny Kurochkin in 1982.
==Classification== Ambiortus dementjevi belongs to Ornithuromorpha, the natural group containing modern birds but not Enantiornithes, according to all published cladistic analyses. The exact position of the species within this group has been controversial. Early studies suggested it was a member of Palaeognathae, the group containing modern ratites and tinamou, but this has not been supported by later research. Some studies have found it to be closely related to the Ichthyornithes, a relatively derived group closely related to modern birds.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).