Bauxitornis is an extinct genus of avisaurid enantiornithean birds which lived in what is now Hungary during the late Cretaceous period (Santonian age).

The inside edge of the trochlea (toe joint) of metatarsal III (the middle preserved midfoot bone) possesses a small but noticeable bony tab (known as a plantar projection) which extends towards the underside of the ankle.

Although the tarsometatarsus is mostly unfused, the proximal (near) parts of metatarsals II and III have fused together into a flat area that extends about a third the length of their shafts.

[1] However, Bauxitornis can be distinguished from these other enantiornitheans due to having a shortened metatarsal II (the innermost preserved midfoot bone) without a tubercule (scarred bump) for the M. tibialis cranialis muscle.

[1] While usually thought to be an avisaurid enantiornithean, one study finds it to be a more basal avialan closely related to Balaur bondoc.