Species: langstoni O'NELL, LUCAS & KUES, 1981
Etymology: In honor of Wann Langston.
Holotype: UNM NP-139
Locality: West side of Torrejon Wash, Sec. 27, T.21N., R. 5 W, Sandoval County, New Mexico.
Horizon: Nacimiento Formation.
Biostratigraphy:
Age: Paleocene Epoch, Lower Paleogene Period, Lower Tertiary Subera, Cenozoic Era.
Material: Dorsal vertebrae 12-13?, lumbar vertebrae 1-4, sacral vertebrae 1-2, caudal vertebrae 1-10, and portions of 10 additional caudal vertebrae, articulated right tibia, fibula, tarsus, and pes, right femur, left femur, tibia, fibula, and fragments of the left pes, proximal end of left humerus, about 200 osteoscutes, part of the left retroarticular process and numerous small bone fragments.
Referred material:
FMNH PR 1427: Cast of type.
Locality: Sec. 33, T.24 N., R.8W, near Nageezi, New Mexico.
Horizon: Nacimiento Formation.
Biostratigraphy:
Age: Paleocene Epoch, Lower Paleogene Period, Lower Tertiary Subera, Cenozoic Era.
Material:
UNM NP-336: Fragments of a few osteoscutes.
= Akanthosuchus? langstoni ANONYMOUS, 1995
Locality: Montana.
Horizon: Judith River Formation.
Biostratigraphy:
Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.
Material:
Number: Not given: Skull pieces, and teeth.
LUCAS, 1992
Locality: San Juan Basin, New Mexico.
Horizon: Puercan.
Biostratigraphy:
Age: Paleocene Epoch, Lower Paleogene Period, Lower Tertiary Subera, Cenozoic Era.
Material:
NMMNH P-15209: Osteoscute.
LUCAS, SPIELMANN, SULLIVAN & LEWIS, 2006
Locality: NMMNH L-3241, New Mexico.
Horizon: De-na-zin Member, Kirtland Formation.
Biostratigraphy:
Age: Kirtlandian age, Upper Campanian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.
Material:
NMMNH P-26234: Osteoderm and right femur.
Note: May not belong to this genus.
SULLIVAN & LUCAS, 1986
Locality: Headlands of De-na-zin Wash, Sec. 4, T24N, R11W, San Juan Basin, New Mexico.
Horizon: Lower Nacimiento Formation, Puercan-Torrejonian.
Biostratigraphy:
Age: Lower Paleocene Epoch, Lower Paleogene Period, Lower Tertiary Subera, Cenozoic Era.
Material:
UNM NP-1901: Osteoscutes and other postrcania.