Species: sylvestris COPE, 1872
Etymology: Latin, sylvestris, "forested, wooded."
= Agathaumas silvestre COPE, 1892 (sic)
= Agathaumas sylvestre COPE, 1890 (not 1889) (sic)
= Triceratops sylvestris (COPE, 1872) KUHN, 1936 (nomen dubium)
= Triceratops silvestris (COPE, 1872) (KUHN, 1936 (nomen dubium)
Holotype: AMNH 4000
Locality: 1/2 miles east of Black Buttes station on the Union Pacific Railroad, Black Buttes, 52 miles east of Green River, Sweetwater County, sec. 9, T18N, R100W, Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material: Right ilium, 8 posterior dorsal and sacral centra, right ilium, and ribs, proximal portion of a pubis? and other fragments.
Referred material:
COPE, 1892
Locality: Dakota.
Horizon:
Biostratigraphy:
Age: Late Cretaceous.
Material:
Number: Not given: Ilium and tibia.