Species: latus MARSH, 1891
Etymology:
Holotype: YPM 1830
Locality: Near the summit of the bluff on the north side of Lightning Creek,
about 2 miles above the mouth of that stream, in the bottom and near the extreme
head of a small, cry watercourse emptying into Lighting Creek, Niobrara County,
Wyoming.
Note: Cow Creek, according to OSTORM & WELLNHOFFER, 1986.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material: Fragmentary skull and fragments of skeleton.
Note: Paleopathology, the perforation in the squamosal (LULL, 1933), 9 POLs,
ventral surface of the right squamosal, POL right prefrontal (TANKE & FARKE,
2006).
Referred material:
COLBERT & BUMP, 1948
Locality: 10 miles east of Camp Crook, Harding County, South Dakota.
Horizon: Hell Creek Formation.
Note: 100 feet below the contact of this formation with the Fort Union Sandstone, Maastrichtian, Late Cretaceous.Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
ANSP 15192: Fragmentary skull.
Note: 4 POLs, dorsal surface of the medial parietal bar (TANKE & FARKE, 2006)
= Torosaurus cf. latus
Locality: East side of Fort Beck Reservoir, Hell Creek, Montana.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
Milwaukee Public Museum 6841: Fragmentary skull and nearly complete skeleton.
Note: Paleopathology, a healed puncture wound and companion “stress fracture” on the anterolateral surface of the left squamosal (JOHNSON, 1989, JOHNSON & OSTROM, 1995).
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Sp
TOKARYK, 1986
Locality: Frenchman River Valley, Saskatchewan Province, Canada.
Horizon: Frenchman Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
EM P16.1: A nearly complete frill.
Note: Paleopathologies? Symmetrical holes in the frill. Bilateral squamosal
fenestra (TANKE & FARKE, 2006).