Species: costatus LEIDY, 1856 (nomen dubium)
Etymology: Latin, costatus, "ridged."
Holotype: ANSP 9263
Locality: Fort Benton, Montana.
Horizon: Judith River Formation.
Biostratigraphy:
Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.
Material: Tooth.
Referred material:
LAMBE, 1902
Locality: Below Berry Creek, Red Deer River, Newell County,Alberta Province, Canada.
Horizon: Judith River Formation.
Biostratigraphy:
Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.
Material:
Number: Not given: Teeth.
SAHNI, 1972Locality: Clambank Hollow, Montana.
Horizon: Judith River Formation.
Biostratigraphy:
Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.
Material:
AMNH 8542: Tooth.
_____________________________________________________________________________________
Species: latus MARSH, 1892 (nomen dubium)
Etymology: Latin, latus, "wide."
Holotype: YPM 4810
Locality: Peterson’s Quarry, Niobrara County, Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material: Tooth.
_____________________________________________________________________________________