Species: minor SLOAN & VAN VALEN, 1965
Etymology: Latin, minor, "minor or small."
Holotype: SPSM 62-2115
Locality: Bug Creek Anthills, Western McCone County, Montana.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material: Left mandible with P3, P4, and alveoli for I, M1, and M2.
Referred material:
SPSM 62-2116: Left M2.
SPSM 62-2117: Left M2.
SPSM 62-2116: Left lower incisor.
SPSM 62-2119: Left M1.
SPSM 62-2120: Right M2.
SPSM 62-2121: Left M1.
SPSM 62-2122: Left M2.
Locality: Bug Creek West, west half of sec. 9, T22N, R43E, Western McCone County, Montana.Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
Number: Not given:
DONOHUE, WILSON, & BREITHAUPT, 2013
Locality: UCMP V-84215 (= UW V-79032), Black Butte Station fossil localitys, eastern flank of the Rock Springs uplift, Sweetwater County, Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP 197664: Isolated right M1.
UW 25147: Isolated right P4.
UW 15177: Isolated left M1.
UW 20078, 20088, 20095, 20151: Isolated right M1s.
= Cimexomys cf. C. minor
UCMP 197648: Isolated left P4.
UCMP 197614: Isolated right M2.
UW 15192, 20083: Isolated right P4s.
UW 20143: Isolated left P4.
UW 20097: Isolated left M2.
Locality: Dino Ray (UW loc. V-79033), Black Butte Station fossil localitys, eastern flank of the Rock Springs uplift, Sweetwater County, Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UW 17979: Isoalted right M1.
FOX 1989Locality: Long Fall, MNBT Quarry, Saskatchewan Province, Canada.
Horizon: Frenchman Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UALVP 22818: RUM1.
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Species: antiquus FOX, 1971
Etymology:
Holotype: UA 5640
Locality: Loc. UA-MR-6, Verdigris Coulee, approximately 18 miles (29 km) east of the village of Milk River, Warner County, Alberta Province, Canada.
Horizon: Upper Milk River Formation.
Biostratigraphy:
Age: Aquilian age, Lower Campanian Stage, Aquilian in age, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.
Material: Left UM1.
Referred material:
UA 5396, 5639; LM1's.
UA 5630, 5638: UP4's.
UA 5395, 5641, 5642: UM1's.
= Sp cf. antiquus EATON & CIFELLI, 1988Locality: Kaiparowits Plateau, Utah.
Horizon: Smoky Hollow Member, Straight Cliffs Formation.
Biostratigraphy:
Age: Upper Turonian Stage, upper Gallic subepoch, lower Gulf Epoch, Early Late Cretaceous.
Material:
Number: Not given:
Locality: Kaiparowits Plateau, Utah.Horizon: Wahweap Formation.
Biostratigraphy:
Age: Aquilian in age, Lower Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.
Material:
Number: Not given:
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Species: magister FOX, 1871
Etymology:
Holotype: UA 5635
Locality: Loc. UA-MR-6, Verdigris Coulee, approximately 18 miles (29 km) east of the village of Milk River, Warner County, Alberta Province, Canada.
Horizon: Upper Milk River Formation.
Biostratigraphy:
Age: Aquilian age, Lower Campanian Stage, Aquilian in age, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.
Material: Left UM1.
Referred material:
UA 5390-5393: LP4's.
UA 5394: Lower first M1.
UA 5636: Left UM1.
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Species: judithae SAHNI, 1972
Etymology:
Holotype: AMNH 77100
Locality: Clambank Hollow, Chouteau County, Montana.
Horizon: Judith River Formation.
Biostratigraphy:
Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.
Material: RLP4.
Referred material:
AMNH 77103: LM1.
AMNH 77105: LM2.
AMNH 77109: UP4.
AMNH 77110: Worn tooth.
AMNH 77111: UM2.
CLEMENS, 1973
Locality: San Juan Basin, New Mexico.
Horizon: Fruitland Formation.
Biostratigraphy:
Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
Number: Not given:
EATON & CIFELLI, 1988Locality: Kaiparowits Plateau, Utah.
Horizon: Lower part of the Kaiparowits Formation.
Biostratigraphy:
Age: Turonian Stage, Uppermost Gallic Subepoch, Lower Gulf Epoch, Late Cretaceous.
Material:
Number: Not given:
KOSTER, CURRIE, EBERTH, BRINKMAN, JOHNSTON & BRAMAN, 1987Locality: Dinosaur Provincial Park, Newell County, Alberta Province, Canada.
Horizon: Dinosaur Park Formation, upper Judith River Group.
Biostratigraphy:
Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.
Material:
Number: Not given:
MONTELLANO, 1988, MONTELANO, WEIL & CLEMENS, 2000Locality: Museum of the Rockies locality TM-006 Egg Mountain, Teton County, Montana.
Horizon: Two Medicine Formation.
Biostratigraphy:
Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.
Material:
MOR 302: Transversely crushed fragment of the anterior parts of the skull and associated mandibles, including fragments of the right dentary with the il-m2, the left dentary with fragments of p3-m1, the right maxilla with P1-M2, the left maxilla with P1-P3, and parts of the premaxillae and nasals, 3 well preserved lumbar vertebrae.
Locality: UCMP V-77083, Makela’s French 1, Mammal 1, Kennedy Coulee, Sections 10, 19, 29, and 30, Township 37N, Range 9E, and in Sections 23, and 24, Township 37N, range 8E, approximately 40 km north of Rudyard, Hill County, Montana.Horizon: Judith River Formation.
Biostratigraphy:
Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.
Material:
UCMP 118578, 131470, 131471, 131472: P4.
UCMP 13054, 131468: M1.
UCMP 131473: M2.
UCMP 131505: p4.
Locality: UCMP V-81234, Put’s Plunder, Kennedy Coulee, Sections 10, 19, 29, and 30, Township 37N, Range 9E, and in Sections 23, and 24, Township 37N, range 8E, approximately 40 km north of Rudyard, Hill County, Montana.Horizon: Judith River Formation.
Biostratigraphy:
Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.
Material:
UCMP 131474: M1.
UCMP 131475: M2.
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Species: magnus SAHNI, 1972
Etymology:
Holotype: AMNH 77120
Locality: Clambank Hollow, Chouteau County, Montana.
Horizon: Judith River Formation.
Biostratigraphy:
Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.
Material: RUM1.
Referred material:
AMNH 77112: LP4.
AMNH 77114: UP4.
EATON & CIFELLI, 1988Locality: Kaiparowits Plateau, Southern Utah.
Horizon: Upper Kaiparowits Formation.
Biostratigraphy:
Age: Judithian age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
Number: Not given:
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Species: haugoi ARCHIBALD, 1982
Etymology:
Referred material:
FOX, 1989
Locality: Long Fall, MNBT Quarry, Saskatchewan Province, Canada.
Horizon: Frenchman Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UALVP 16061: UM1.
UALVP 22813: UP4.
UALVP 22814: UM1.
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Species: gregoryi EATON, 1993
Etymology: For Hervert E. Gregory, who pioneered geological research on the
Paunsaugunt Plateau and the region in general.
MNA V6407
Locality: MNA locality 1073, near the junction of Mill Creek and the East Fork of the Sevier River, Podunk Creek, USGS 7.5 minute Quadrangle, Paunsaugunt Plateau, Utah.
Horizon: Upper Kaiparowits Formation.
Biostratigraphy:
Age: Judithian age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material: RM1.