Genus: Oryctodromeus VARRICCHIO, MARTIN, & KATSURA, 2007
Etymology: Greek, orycto, "digging"; Greek, dromeus, "runner"; Digging runner.

Species: cubicularis VARRICCHIO, MARTIN, & KATSURA, 2007
Etymology: Greek, cubiculairs, translates to "of the lair," referring to the inferred denning habit of the taxon.

Holotype: MOR 1636a

Locality: Near Lima Beaks, Beaverhead County, Montana.

Horizon: Blackleaf Formation.

Biostratigraphy:

Age: Cenomanian Stage, Upper Middle Gallic Subepoch, Lowermost Gulf Epoch, Upper portion of the Mid-Cretaceous.

Material: Fused premaxillae, posterior/occipital region of the braincase, 3 cervical, 6 dorsal, sacrum and 23 caudal vertebrae, 3 dorsal ribs, scapulocoracoid, scapula, coracoid, humerus, ulna, radius, tibiae, distal fibula and metatarsal IV.

Oryctodromeus cubicularis (modified from VARRICCHIO, et al., 2007), Holotype: MOR 1636a

Oryctodromeus skull based on MOR 163a, MOR 1642 after KRUMENACKER, VARRICCHIO, ORGAN, GARDNER, BRITT & BOYD, 2024.

Paratype:

MOR 1636b: Cranial and postcranial materials found in association with holotype and represents 2 juveniles.

Note: Found in a burrow.

Referred material:

KRUMENACKER, VARRICCHIO, ORGAN, GARDNER, BRITT & BOYD, 2024

Locality: Near Lima Peaks, Beaverhead County, Montana.

Horizon: Vaughn Member, Blackleaf Formation.

Biostratigraphy:

Age: Albian Stage, Middle Gallic Subepoch, Late Early Cretaceous Epoch, Late Early Cretaceous to Cenomanian Stage, Upper Middle Gallic Subepoch, Lowermost Gulf Epoch, Upper portion of the Mid-Cretaceous.

Material:

MOR 1634: Axial fragments and fragments from the forelimb and hindlimbs.

MOR 1635: Fragments from the axial column and hindlimb.

MOR 1638: Skull fragments, axial fragments, and hindlimb fragments.

MOR 1639: Hindlimb fragments.

MOR 1640: Axial fragments, forelimb and hindlimb fragments.

MOR 1642: Portions of 2 associated individuals coprising disarticulated cranial elements, partial axial columns, partial forelimbs, partial pelvic girdles, and partial hind limbs.

MOR 8660: Axial and hindlimb fragments.

MOR 8683: Axial and hindlimb fragments.

MOR 8684: Hindlimb and pelvic fragments.

 

Locality: Bonneville and Caribou Counties, Idaho.

Note: Specific locality information is on file at the respective institutions.

Horizon Wayan Formation.

Biostratigraphy:

Age: Albian Stage, Middle Gallic Subepoch, Late Early Cretaceous Epoch, Late Early Cretaceous to Cenomanian Stage, Upper Middle Gallic Subepoch, Lowermost Gulf Epoch, Upper portion of the Mid-Cretaceous.

Material:

IMNH 44920: A partial skeleton comprising a partial axial column, partial forelimbs, pelvic girdle fragmetns and partial hindlimbs.

IMNH 44939: Portions of 2 associated individuals preserving a partial axial colum, partial hindlimbs, pelvic fragmetns, adn patial hindlimbs.

IMNH 44946: Skull fragments, a partial axial column, forelimb fragments, and hindlimb fragments.

IMNH 44951: A partial articulated skeleton, with a partial axial column, partial forelimbs, a partial pelvic girdle, and partial hindlimbs.

IMNH 45081: A partial pelvis.

IMNH 45596: A partial preparid specimen with partial saxial and hindlimb elements.

IMNH 46169: A partial skeleton with skull fragments, a partial axial column, a partial forelimb, and partial elements.

IMNH 49842: A partial prepared specimen consisting a axial forelimb, and hindlimb elements.

IMNH 50846: Associated elements from a juvenile and preseumed adult comprising axial and hindlimb fragments.

IMNH 50847: A partial prepared specimen from a burrow fill with axial and hindlimb elements.