Genus: Dysganus COPE, 1876 (nomen dubium)
Etymology: Greek, dys-, “bad, difficult” and Greek, ganos, “luster [enamel]”: “rough enamel”.

Species: encaustus COPE, 1876 (nomen dubium)
Etymology:

Holotype: AMNH 2479 (5739?)

Locality: Dog Creek, 6.4 km (4 mi) east of Judith River, Fergus County, Montana.

Horizon: Judith River Formation.

Biostratigraphy:

Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.

Material: Tooth.
Note: A tyrannosaurid tooth was mixed in along with hadrosaur teeth.


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Species: bicarinatus COPE, 1876 (nomen dubium)
Etymology:

Holotype: AMNH 3975

Locality: Dog Creek, 6.4 km (4 mi) east of the Judith River, Fergus County, Montana.

Horizon: Judith River Formation.

Biostratigraphy:

Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.

Material: Tooth.


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Species: haydenianus COPE, 1876 (nomen dubium)
Etymology:

Holotype: AMNH 5738

Locality: Dog Creek, 6.4 km (4 mi) east of Judith River, Fergus County, Montana.

Horizon: Judith River Formation.

Biostratigraphy:

Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.

Material: Teeth from 2 individuals.


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Species: peiganus COPE, 1876 (nomen dubium)
Etymology:

Holotype: AMNH 3974

Locality: Dog Creek, 6.4 km (4 mi) east of Judith River, Fergus County, Montana.

Horizon: Judith River Formation.

Biostratigraphy:

Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.

Material: Tooth crown.