Genus: Palintropus BRODKORB, 1970
Etymology: Greek palintropos (masculine, that which is turned back), from palin (backwards) and trepo (I bend) in reference to the recurved glenoid facet of the coracoid.

Species: retusus (MARSH, 1892) BRODKORB, 1970
Etymology:  Latin, retusus (retundere), “blunt.”
= Cimolopteryx retusus MARSH, 1892
= Apatornis retusus (MARSH, 1892) BRODKORB, 1963

Holotype: YPM 513

Locality: Converse County, Kansas.

Horizon: Smoky Hill Member, Niobrara Formation.

Biostratigraphy:

Age: Coniacian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material: Upper fragment of left coracoid, lacking head.

Referred material:

LONGRICH, TOKARYK & FIELD, 2011

Locality: Montana.

Horizon: Hell Creek Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

AMNH 987: Coracoid.