Yuanyanglong (meaning "lovebird dragon") is an extinct genus of oviraptorosaurian theropod dinosaurs from the Early Cretaceous Miaogou Formation of China.

[1] The Yuanyanglong fossil material, was discovered in 2021 in sediments of the Miaogou Formation (Maortu locality) in the Gobi Desert of Chilantai, Inner Mongolia, China.

Two incomplete skeletons were found in association on the same block, which are assumed to represent the same species based on comparable anatomy and body size.

[1] In 2024, Hao et al. described Yuanyanglong bainian as a new genus and species of early oviraptorosaurs based on these fossil remains.

[1] In their phylogenetic analyses, Hao et al. (2024) recovered Yuanyanglong as a basal member of the Oviraptorosauria, diverging after the Caudipteridae as the sister taxon to the Edentoraptora (Avimimidae [Avimimus spp.]