Species: northropi LAWSON, 1975
Etymology: In honor of John “Jack” Northrop, who developed the tailless flying wing aircraft in the 1940s.
= Nova LAWSON, 1972 (nomen nudum)
Holotype: TMM 41450-3
Locality: Dawson Creek, 3.2 kilometers west of Maverick Ranger Station, Big Bend National Park, Brewster County, Texas.
Horizon: Lower part of the Javelina (Tornillo) Formation, Tornillo Group.
Age: Lancian age, Maastrichtian Stage, Uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material: Left humerus, partial radius, ulna, proximal and distal carpals, metacarpal and 1st and 2nd phalanges of 4th digit.
Number: Not given: 4 wings, a neck, the hind legs, and mandibles.
Locality: West of Cottonwood Wash Canyon, Brewster County, Texas.
Horion: Javelina Formation.
Age: Middle Maastrichtian Stage, Late Senonian Subepoch, Late Gulf Epoch, Late Cretaceous.
Number: Not given: Bone fragment.