Species: borealis BROWNSTEIN, MEYER, FABBRI, BHULLAR & GAUTHIER
Etymology: Greek, borealis, "north".
Holotype: YPM VP 4718
Locality: Locality: "Quarry 9", Como Bluff, Albany County, Wyoming.
Horizon: Brushy Basin Member, Morrison Formation.
Biostratigraphy: Zone 4.
Age: Comobluffian age, Tithonian Stage, uppermost Malm Epoch, Late Jurassic.
Material: Closely associated maxilla, braincase and cranial fragments.