Genus: Eotriceratops WU, BRINKMAN, EBERTH & BRAMAN, 2007
Etymology: Greek, eos, "dawn," + Triceratops, implying that it is an early member of the "Triceratops" group.
= Genus: Nova WU, BRINKMAN, & EBERTH, 2006
Species: xerinsularis WU, BRINKMAN, EBERTH & BRAMAN, 2007
Etymology: Specific name xerinsularis referes to Dry Island Buffalo Jump Provincial Park, Kneehill County, Southern Alberta Province, Canada, where the specimen was collected.
Holotype: RTMP 2002.57.7
Locality: Within Dry Island Buffalo Jump Provincial Park (northeastern quarter), Kneehill County, Southern Alberta Province, Canada.
Horizon: Upper 20 m of the Horseshoe Canyon Formation, Edmonton Group.
Age: Edmontonian age, lower Maastrichtian Stage, Upper Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material: An incomplete and disarticulated skeleton, including right rostral, both premaxillae, both maxillae, left supraorbital horn core with lacrimal, prefrontal, frontal, postorbital and jugal, left epijugal, right quadratojugal, left quadrate, partial parietal, left squamosal frill, braincase, syncervical, cervicals 4 and 5, a string of vertebrae including posterior cervicals and anterior dorsals, some ribs and fragments of ossified ligaments.
Note: Has bite mark traces clusted at the external base of the left supraorbital horncore with reactive bone formation. May be from healing bite trauma or possibly some other form of osteopathy (TANKE & ROTHSCHILDS, 2001.