Feilongus is an extinct genus of ctenochasmatid pterodactyloid pterosaur from the Barremian–Aptian-age Lower Cretaceous Yixian Formation of Beipiao, Liaoning, China.

The genus was named and described in 2005 by Wang Xiaolin, Alexander Kellner, Zhou Zhonghe and Diogenes de Almeida Campos.

Feilongus is based on holotype IVPP V-12539, a skull and articulated mandible, with on the same plate the detached posterior braincase, of a subadult individual.

[1] The wingspan of Feilongus was estimated by Wang and colleagues to have been around 2.4 meters (7.9 feet), making it large for a basal pterodactyloid.

[3] However, in 2006 an analysis by Lü Junchang had as outcome that Feilongus was not an archaeopterodactyloid, but a member of the Ornithocheiroidea sensu Kellner, closer to the Anhangueridae.