Genus: Ornithotarsus COPE, 1869 (nomen dubium)
Etymology: Greek, ornith- (ornis), “bird” and Greek, tarsus, "ankle.”
= Ornithosaurus RIABININ, 1930 (sic)

Species: immanis COPE, 1869 (nomen dubium)
Etymology: Latin, immanis, "immense."

Holotype: YPM 3221

Locality: Lorillard Company pit? 2 1/2 miles east of Keyport, or Union, southern shoreline of Raritan Bay, Monmouth County, New Jersey.

Horizon: Woodbury Formation, Matawan Group.

Biostratigraphy:

Age: Lower Campanian Stage, Senonian subepoch, Gulf Epoch, Late Cretaceous.

Material: Distal end of left tibia, and fibula, with coossified astragulas and calcaneum.

Referred material:

Locality: Merchantville, Camden County, New Jersey.

Horizon: Merchantville Formation, Matawan Group.

Biostratigraphy:

Age: Coniacian Stage, Lowermost Senonian subepoch, Gulf Epoch, Late Cretaceous.

Material:

ANSP 8956: 3rd metatarsal.

 

WOOLMAN, 1897

Locality: From a Pennsylvanian Railroad Company test boring hole at the crossing of Mooretown pike over their branch from Delair to Haddonfield, Merchantville, New Jersey.

Horizon: Matawan Group.

Biostratigraphy:

Age: Middle-Upper Campanian Stage, Senonian subepoch, Gulf Epoch, Late Cretaceous.

Material:

Number: Not given: Metatarsal.