Species: atokensis STOVALL & LANGSTON, 1955
Etymology:

Holotype: OMNH 10146 (old MUO 8-0-S9)

Locality: W.P. Cochran Farm, Atoka County, Oklahoma.
Note: Farm of Mr. Herman Arnold, southeast part of the southwest quarter of Sec. 26, T4S, R14E, South Oklahoma?

Horizon: Paluxy Church Formation, Trinity Group.

Biostratigraphy:

Age: Comanchean, Lower Cashenranchian age, Early to Middle Albian Stage, Middle Gallic subepoch, upper Early Cretaceous Epoch, Early Cretaceous.

Material: Occiput, frontals, parietals, left jugal, left lachrymal, right squamosal, right postorbital, right ectopterygoid, articular portion of left ramus, 9 cervicals, 6 dorsals, 8 unattached dorsal spines, 1 abdominal rib, 2 anterior chevrons, left coracoid, pubes, left ischium, distal end of right femur, left tibia, right fibula fragmentary left fibula and left astragalus.
Note: Palaeopathology, the articular surface of the squamosal for the quadrate has exostotic material, and the neural spine of caudal 11 seemingly suffered a displaced fracture before healing and mentions an unusual hook like structure on the neural spine of caudal 3 (TANKE & ROTHSCHILD, 1999, MOLNAR, 2001)

Referred material:

CURRIE & CARPENTER, 2000, GRAFFHAM, 1994, RUSSELL, 1998

Locality: McCurtin County, Oklahoma.

Horizon: Antlers Formation, Upper unit.

Biostratigraphy:

Age: Cashenranchian age, Lower-Middle Albian Stage, middle Gallic subepoch, lower Cretaceous Epoch, Early Cretaceous.

Material:

NCSM 14345: Complete skull and dentary, and fragmentary skeleton.
Note: Palaeopathologies, several broken and healed right ribs and scapula in a third specimen (LARSON, 1998, MOLNAR, 2001)

Also OMNH 10168: Fragments of vertebrae, ischium and femur.

 

HARRIS, 1997

Locality: Hobson Ranch, SMU Locality #261, Parker County, Texas.

Horizon: Twin Mountains Formation, Trinity Group.

Biostratigraphy:

Age: Comanchean, Lower Cashenranchian age, Early to Middle Albian Stage, Middle Gallic subepoch, upper Early Cretaceous Epoch, Early Cretaceous.

Material:

SMU 74646 (FWMSH 93B-9): Right palatine, left ectopterygoid, a partial left jugal, the caudal end of one mandible, 2 teeth, fragmentary cervical, dorsal, sacral and caudal vertebrae, ribs, gastralia, fragmentary scapulae, ischia, pubes, femora and distal end of a metatarsal.
Note: Palaeopathology, Neural spine of caudal 16 was broken and displaced and pears a pit that may be the result of a bite, nondisplaced healed fractures of 5 ribs are interpreted by a single incident, another dorsal rib bears what seems to have been pseudoarthrosis that ultimately rejoined, the proximal end of dorsal rib 13 was also fractured, and a pit on the dorsal surface suggested that this maybe healed bite mark, a pair of apparently pseudoarthrotic gastralia and the neural spines of cervicals 3 and 4.