Holotype:

Locality: Carnegie Quarry, Dinosaur National Monument, north of the little town of Jensen, Uintah County, Utah.

Horizon: Brushy Basin Member, Morrison Formation.

Biostratigraphy: Zone 3.

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

Material: ?

Referred specimens:

CM 4161: Left mandible.

DMN 39/60AA: Complete left pectoral girdle, limb and manus, left tibia, fibula and pes, seven cervicals, 6 dorsal vertebrae and a caudal.

CM 10001: Right femur, coracoid (DNM 197).

CM 10003: Dermal plate (DNM 39/60).

CM 11341: Posterior dorsal vertebrae, ribs, complete sacrum, pelvis and tail with tail spikes in place, left femur lacking distal end.

CM 11372: Composite skeleton.

CM 12000: Cranium and other skull fragments (DNM 365)

CM 21709: Left femur (DNM 319).

CM 21711: Sacrum and 2 caudal vertebrae (DNM 39/17)

CM 21727: Dorsal vertebrae, right scapula.

CM 21739: Right humerus (With DNM 240), perhaps same individual as CM 21727.

CM 21755: Left femur (DNM 59).

CM 21758: Femora, right tibia and astragalus (DNM 232).

CM 21761: Right humerus (?DNM 39) formerly catalogued as part of Apatosaurus CM 3378.

CM 21765: Left humerus, radius and ulna (Found with Barosaurus skeleton DNM 310 and formerly catalogued CM 11984 and CM 11985).

CM 21766: Caudal vertebrae (Formally catalogued as part of Apatosaurus CM 3378)

CM 21767: Distal end of left humerus (DNM 348/B), formerly catalogued as part of Barosaurus CM 11878.

CM 21768: Right scapula-coracoid (with DNM 120/Ra).

CM 21770: Scapula-coracoid, right femur, 3 caudals, rib and dermal spike (DNM 197/33).

CM 21773: Calcaneum (DNM 39/60).

CM 21774: Dorsal vertebrae, caudals, right scapula-coracoid, originally part of CM 2969 (DMN 285/C and H) and a right fibula.

CM 21776: Caudal vertebrae (DNM 231/A)

CM 33696: Femora, right scapula.

CM 33697: 2 vertebrae.

CM 36700: Right radius.

CM 33908: Chevrons (DNM 197/31) perhaps belonging to 21770.

CM 33917: Dorsal vertebrae, rigs and scapula (DNM 39/65a)

CM 33919: Right femur (cast).

CM 33920: Lower half of right ulna, carpal, metacarpal I, metacarpal, transferred to Washington with Barosaurus (DNM 340).

CM 33922, CM 33923: Carpal.

CM 33930: 3 Caudals with a rib (DNM 102 part)

CM 33931: Sacral rib (DNM 39/76)

CM 33932: Metacarpal I.

CM 33933: Metacarpal.

CM 33934: Centrum and 2 arches (DNM 270/A)

CM 33935: Caudal vertebrae (DNM 244)

CM 33936: Ulna (DNM 39/60Q).

CM 33937: Four caudal vertebrae (DNM 130)

CM 33938: Caudal centrum (DNM 120/Ra)

CM 33939: Caudal centrum (with DNM 130)

CM 33940: Caudal spine (with DNM 45)

CM 33942: Dermal spike, 3 caudals, and end of ilium (DNM 39/60Ca).

CM 33945: Distal half of radius (DNM 39/60, part).

CM 33946: Right humerus (DNM 270), perhaps belonging with CM 33934.

CM 33966: Distal caudal vertebrae (with DNM 146).

CM 33983: Two caudal vertebrae (DNM 39/78).

CM 33992: Incomplete left ilium (DNM 102/6).

CM 37005: Caudal vertebrae and rib (DNM 39/60). Part of former CM 11372.

CM 38354: Right coracoid (DNM 226/10).

CM 38340: Left femur, tibia, fibula, astragalus (DNM 320/A, B, C).

CM 38354: Right coracoid.

UCMP 27207: Vertebra.

UUVP 10049: Anterior caudal.

Juveniles from DNM:

CM 21772: Incomplete humerus.

DNM 339-340: Tibia with associated fibula.

DNM 638: Dorsal and 2 centra.

DNM 688: Ilium.

DNM 2438: Left scapula, right and left humerus, right and left ulnae, right radius, right ilium, left pubis, right and left femora, right and left tibiae, left and right fibulae and some ribs.
DNM 2543: ?Sternal rib.

DNM 2544: ?Right 1st palpebral.

DNM 2547: Part of floor of braincase. Juvenile.

DNM 2456: Right tibia and right fibula.

MEYERS & HOOPS, 1993

DINO 4713-4720, 4094, 4101, 4138, 4140, 4142: Cervical vertebrae.

DINO 4721-4724, 4224, 4556, 4557, 4595, 4596: Dorsal vertebrae.

DINO 3912, 3960, 3966, 4001, 4084: Ribs.

DINO 3933-3937, 3949, 4961, 4070, 4115-4117: Caudal vertebrae.

DINO 3956-3959: Carpals and metacarpals.

DINO 3961-3962: Phalanges.

DINO 3963, 4848: Humerii.

DINO 3965, 4130: Chevron.

DINO 3974: Ulna.

DINO 3975, 4524: Radius.

DINO 3978, 3980, 4014, 4019, 4021, 4076, 4121, 4144, 4665, 4851: Plates.

DINO 3999: Dorsal rib.

DINO 4008: Right fibula of a juvenile.

DINO 4069: Sacrum and ilia.

DINO 4077, 4080, 4849: Tibia.

DINO 4082: Femur.

DINO 4427: Ischium.

DINO 4268: Humerus of a juvenile.

DINO 4614: Astragalus.

Juvenile skeleton.