Genus: Ambiortus KUROCHKIN, 1982
Etymology: Latin, ambiquus, “vacillating, uncertain” and Latin, ortus, “origin, beginning”: “Uncertain origin”

Species: dementjevi KUROCHKIN, 1982
Etymology: In honor of Prof. G. P. Dement’yev.

Holotype: PIN 3790-271

Locality: Khurilt-Ulan-Bulak locality, Central Mongolian Altai Mountains, Bayankhongor Aimag, Mongolia.

Horizon: Boontsagaan Gorizont.


Age:?Barremian Stage, Lower Gallic Subepoch, Middle Early Cretaceous Epoch, Early Middle Cretaceous.

Material: Scapula, coracoid, proximal end of humerus, cervical and dorsal vertebrae, distal end of ulna, clavicle, furcula, carina of sternum, feather impressions.

Referred material:

PIN 3790-272: Phalanx 1-3, ungual, and feather impressions.