Species: bicentesimus MADSEN, 1976
Etymology: In honor of the bicentennial of the United States.

Holotype: UUVP 2826

Locality: Cleveland-Lloyd Dinosaur Quarry, approximately 20 miles south of Price, SE 1/4, SE 1/4, Sec. 21, T17S, R11E, SLBM. lat 39°19’00", Long. 110°41’15"W, San Rafael Swell Area, Carbon County, Utah.

Horizon: Brushy Basin Member, Morrison Formation.

Biostratigraphy: Zone 3.

Age: Comobluffian age, Kimmeridgian Stage, uppermost Malm Epoch, Late Jurassic.

Material: Left ilium.
Note: Palaeopathology an anomalous ridge on the lateral face, thought to be the result of an injury (MOLNAR, 2001).

Hypodigm.

UUVP 1864: Left maxilla.

UUVP 1845: Left ilium.

UUVP 1882: Left ilium.

UUVP 2742: Right ilia.

UUVP 40-295, 1867: Left pubes.

UUVP 4736: Right pubis.

UUVP 2832: Right ischium.

UUVP 2878: Left ischium.

UUVP 3266: Right premaxilla.

UUVP 4695, 1846: Right maxillae.

YPM/PU 14554: Right ilium.

BYU 2501: Caudal vertebra.

 

CHURE, BRITT & MADSEN, 1993, CHURE & BRITT, 1993

Locality: Quarry face as exposed inside the Dinosaur National Monument Visitor Center, Carnegie Quarry, Vernal, Uintah County, Utah.

Horizon: Brushy Basin Member, Morrison Formation.

Biostratigraphy: Zone 3.

Age: Comobluffian age, Kimmeridgian Stage, uppermost Malm Epoch, Late Jurassic.

Material:

CMNH 21704: Fragmentary skull and articulated vertebral column from 2 specimens.