Genus: Meniscoessus COPE, 1882
Etymology: Greek, meniskos, “small moon, crescent” and Greek, -essos, “less,
little”: Little crescent (tooth).
= Tripriodon MARSH, 1889
Etymology:
Species: conquistus COPE, 1882
Etymology:
Holotype: AMNH 3011
Locality: South of Harding County, South Dakota.
Horizon: Lower? Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material: Slightly damaged right M2
Referred material:
Uncatalogued SDSM: Teeth, a humerus and a tibia collected less than a mile from type.
SLOAN & RUSSELL, 1974
Locality: Scabby Butte, northwest of Lethbridge, Lethbridge County, Southwestern Alberta Province, Canada.
Horizon: Lower St. Mary River Formation.
Biostratigraphy:
Age: Edmontonian age, Upper Campanian Stage- Lower Maastrichtian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
ROM 7846: A tricuspid anterior upper premolar, P1 or P2.
ROM 7847: Left M2.
ROM 7850:
_____________________________________________________________________________________
Species: robustus (MARSH, 1889)
Etymology:
= Dipriodon robustus MARSH, 1889
Holotype: YPM 11234
Locality: Mammal locality no. 2, Lance Creek Region, Niobrara County, Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material: Right LM2.
Referred material:
ARCHIBALD, 1982
Locality: V72213, Trumbo's Anthill, Garfield County, Montana.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP 116965: UP4.
UCMP 116964: UP4.
UCMP 116959: LM1.
UCMP 116962: LM2.
UCMP 116967: UM1.
UCMP 116970: UM2.
Locality: V73076, Engdahl Anthills 2, Garfield County, Montana.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP 108980: UP4.
Locality: V77130, Hauso 1, Garfield County, Montana.Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP 120390: UP4.
UCMP 120394: UP4.
UCMP 120395: UP4.
Locality: V72207, Windy Hill, Garfield County, Montana.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP 116958: LM1.
UCMP 116972: UM2.
UCMP 116974: UM2.
UCMP 116975: UM2.
Locality: V76145, Flint's Stone and Ext., Garfield County, Montana.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP 116960: LM1.
Locality: V75178, Wild Horse Basdin, Garfield County, Montana.Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP 116961: LM2.
Locality: V73103, Dry Fork Coluee, Garfield County, Montana.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP 116963: LM2.
UCMP 116966: UM1.
Locality: V73087, Flat Creek 5, Garfield County, Montana.Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP 116968: UM1.
Locality: V73089, Gynnoskus Locality, Garfield County, Montana.Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP 116969: UM1.
Locality: V73083, Flat Creek 1, Garfield County, Montana.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP 108963: UM2.
Locality: V72200, Fried's Place, Garfield County, Montana.Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP 116973: UM2.
Locality: V73051, Fred Fitch Ranch, Garfield County, Montana.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP 107405: Fragmentary right dentary with I, LP4, and LM1-2.
Locality: Fallon County, Montana.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
CCM 68-104: Fragmentary left dentary with erupting I, LP3-4 and M1.
Locality: V73078, Engdal Anthills 4, Garfield County, Montana.Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP 109871: Right LI1.
Locality: V73097, Browine Butte, Garfield County, Montana.Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP 116976: Worn right UI1.
Locality: LACM 3075, = UCMP V72206, Meniscoessus skull, Garfield County, Montana.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
LACM 24524: Fragmentary skull with left UI2, UP1-2, UM1-2 fragments, right UI2, alveoli for UP1-2, fragments of Right UM1-2.
Locality: LACM 3072
Horizon:
Biostratigraphy:
Age:
Material:
LACM 55728: LM2.
LACM 55730: UM1.
LACM 55729: UM2.
Locality: LACM 3081,
Horizon:
Biostratigraphy:
Age:
Material:
LACM 55731: LM2.
Locality: LACM 3095,
Horizon:
Biostratigraphy:
Age:
Material:
LACM 55734: LM2.
Locality: LACM 3485
Horizon:
Biostratigraphy:
Age:
Material:
LACM 55753: Left maxilla fragment with UP1-2, P3 roots.
Locality: "LISMAS"
Horizon:
Biostratigraphy:
Age:
Material:
AMNH 21930: UM1.
Locality: fv-15,
Horizon:
Biostratigraphy:
Age:
Material:
USNM 17084: UM1.
CLEMENS, 1963
Locality: UCMP V-5620, Lull Quarry, near the head of a tributary of Buck Creek, Powder River Basin, Niobrara County (Formerly Converse County), Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP 46875: Fragment of mandible with LP3-4.
plus 91 isolated teeth.
Locality: UCMP V-5711, Bushy Tailed Blowout, Quarry area includes the floor of a small blowout approximately 10 yards northwest of the highest point on the ridge forming the northeastern side of the blowouts of loc. V-5003, S 1/2, Sec. 20, T37N, R64W, Lance Creek, Powder River Basin, Niobrara County, Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP 48155: Fragment of maxilla with UM1 and alveoli for UP2-4.
AMNH 57400: Fragment of mandible with LP3-4 and LM1.
KU 12897: Fragment of maxilla containing part of the alveolus for a root of UP1, UP2 and UP3, alveoli of UP4 and UM1.
Numbers: Not given: plus 85 isolated teeth.
Locality: UCMP V-5815, Hatcher Number 2, western side of a cross-stratified sandstone erosional remnant near the center of a large blowout on the crest of a ridge, the distance form the nearest point on the road, approximately 150 yards south of the quarry, to the Johnson ranch is 0.4 miles, Eastern Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
Numbers: Not given: 6 isolated teeth.
Locality: V-5621, Cow Creek, site 1, anthills and talus found on and around outcrops of cross-stratified sandstone on the north side and near the upper end of a gully emptying into a northern tributary of Cow
Creek, Wyoming.Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP 46427: Fragment of mandible with LM1-2.
Localities: UCMP V-5002, V-5004, V-5616, V-5618, V-5619, V-5622, V-5623, V-5713, V-5816, V-5919, V-5920 and V-5921, mammal localities 4, 5, ?6, 7, 8, ?9, and 10, Peterson's and Beecher's quarries of LULL 1915, Wyoming.
Locality: UCMP V-5003, S 1/2, Sec. 20, T37N, R64W, Lance Creek, Powder River Basin, Niobrara County, Wyoming.
Locality: UCMP V-5817, False Disciple Point, cross-stratified sandstone and sandy shales cropping out on the top of the northern end of a long, northwestward-trending ridge that extends from the crest of the divide between the Hancock and Lance Creek drainages, Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
Numbers: Not given: Isolated teeth.
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 197615: Isolated left m1.
UCMP 197655: Isolated left P4.
UW 15123: Fragmentary right m1.
UW 20046: Fragmentary right m2.
UW 15195: Isolated right P4.
= Meniscoessus cf. M. robustus
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 20157: Right p4.
FOX, 1989
Locality: Wounded Knee local fauna, a roadcut along Rte. 37, approximately 34 km south of Shaunavon, Saskatchewan Province, Canada.
Horizon: Frenchman Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UALVP 22673: LI1.
UALVP 22674: UM1.
Locality: Fr-1, near Ravenscrag, Saskatchewan Province, Canada.Horizon: Frenchman Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UALVP 15095: LP4 (anterior fragment).
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 22817: LP4 (Anterior fragment).
HOGANSON & MURPHY, 2002
Locality: UND A497, Emmons County, North Dakota.
Horizon: Breien Member, Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UND-PC15839: RM1.
HUNTER & ARCHIBALD, 2002
Locality: PTRM locality V89004, Miller Ranch locality, North Dakota.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
PTRM 1275:
Locality: PTRM locality V92002, North Dakota.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
PTRM 603: Right P4.
Locality: PTRM locality V87009, Pretty Butte locality, Sunset Butte locality, North Dakota.Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
RTM 600: Right p4.
Locality: PTRM locality V93022, Sunset Butte locality, North Dakota.Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
PTRM 1283: Left M1.
Locality: PTRM locality V89003, North Dakota.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
PTRM 3563: Left m2.
Locality: PTRM locality V87012, Mud Butte locality, North Dakota.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
PTRM 3556: Right M1.
PTRM 2117: Left m1.
RTM 696: Right m1.
HUNTER & PEARSON, 1996
Pioneer Trails Regional Museum, Bowman, North Dakota, PTRM
Locality: PTRM-V92067, Little Missouri badlands on public (county) land in the NE 1/4, NW 1/4, SE 1/4, SW 1/4, Section 27, T131N, R105W, Cedar Hills Quadrangle, Bowman County, North Dakota.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
PTRM-1268: LI2.
PTRM-1249, 1253, 1256: LM2.
PTRM-619, 1288, 2116: RM2.
PTRM-2119: Lp4.
PTRM-2112: Lp4 fragment.
PTRM-2111: Rp4 fragment.
PTRM-1248, 1269: Lm1.
PTRM-2115: Rm1.
PTRM-613, 1228, 1229, 1252: Lm2.
PTRM-621, 623, 624, 1226, 1231, 1247, 1264, 1287: Molar fragments.
HUNTER, HARTMAN & KRAUSE, 1997
Locality: Muddy Tork Locality, Makoshika State Park, Williston Basin, Montana.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
MOR 857: RP4.
MOR 858, 859: LM1.
MOR 860: RM1 fragment.
MOR 861: RM2.
MOR 862, 863, 864: Lil..
MOR 865: Ril.
MOR 868, 869, 870: Lp4.
MOR 871: Lm1.
MOR 872, 873: Rm2.
Locality: Q.V. Locality, Makoshika State Park, Williston Basin, Montana.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
MOR 866: RP2.
MOR 874: Lil fragment.
Locality: Vashus Locality, Makoshika State Park, Williston Basin, Montana.Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
V-2: Right dentary with p4, m1.
V-3: Right dentary with m1, m2.
Locality: Specific Locality unknown, Makoshika State Park, Williston Basin, Montana.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
MOR 878: RM2.
MOR 879: Right dentary with m1, p4, base il.
MOR 889: Rm2.
MOR 881: Lm2.
MOR 882: Right proximal femur.
LOFGREN, 1995Locality: UCMP V85092, K-Mark, Bug Creek anthill, McGuire Creek, Montana.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
Number: Not given: 4 M1, 4 M2, 1 p4, 3 m1, and 1 m2.
WEIL, 2003
Locality:
Horizon:
Biostratigaphy:
Age: Late Cretaceous.
Material:
NSM-PV 20436: Nearly complete skull.
= Meniscoessus cf. M. robustus WILSON, DECHENSE & ANDERSON, 2010
Locality: Ingrid’s Jaw, DMNH loc. 3322 (=UWBM loc. C1098) is an irregular, weathered isolated outcrop of ~30 m2 immediately south of Weld County Road 122, Pawnee National Grasslands, Cheyenne basin, Weld County, Colorado.
Horizon: Upper Laramie Formation.
Biostratigraphy:
Age: Late Edmontonian or early Lancian Age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
DMNH 52225; Right upper incisor.
DMNH 52226: Right dentary fragment wiht p4.
DMNH 52229: Right p4 mesial fragment.
DMNH 52395: Right M1 fragment.
DMNH 52525: Lef m1.
WHITMORE, 1988Locality: SDSM Locality V852, Hanson Locality, Niobrara County, Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
SDSM 12369: Left I1.
SDSM 12368: Left? P1.
SDSM 12370: Left? P1.
Locality: SDSM Locality V851, Zerbst Locality, east of the Cheyenne River, Niobrara County, Wyoming.
Horizon: Lance Formation.Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
SDSM 12358: Left M1.
SDSM 12359: Right M1.
SDSM 12357: Left M2.
WOOD & ORMSBEE, 1954Locality: From a blowout on the Altman property, on the Lance Creek, Crazy Woman Creek divide, east of the Lance Creek-Hampshire road, 17.3 miles by road north of Lance Creek, Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
AM 10401: Buccal half of LM1.
AM 10419: Postero-external corner, LM2.
AM 10426: RP4.
?robustus STORER, 1991
Locality: Gryde Local Fauna, Southwestern Saskatchewan Province, Canada.
Horizon: Frenchman Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
P1927.62: RP1.
P1927.774: LM1.
= Dipriodon lonatus MARSH, 1889
Etymology:Holotype: YPM 11825
Locality: Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material: Isolated m1.
Referred material:
Number: Not given: Upper molar.
= Tripriodon coelatus MARSH, 1889
Etymology:Holotype: USNM 2885
Locality: Converse County, Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material: Right M2.
= Selenacodon fragilis MARSH, 1889
Etymology:Holotype: YPM 11897
Locality: Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material: M1.
= Halodon sculptus MARSH, 1889
Etymology:Holotype: YPM 11810
Locality: Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material: P4.
= Oracodon anceps MARSH, 1889
Etymology:Holotype: YPM 11862
Locality: Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material: Last upper molar.
= Oracodon conulus MARSH, 1892
Etymology:Holotype: USNM 2141
Locality: Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material: Last upper molar.
= Meniscoessus borealis SIMPSON, 1927
Etymology:Holotype: AMNH 14411
Locality: “Near the head of the east fork of Crooked Creek”, Dawson County, Montana.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material: Left M2.
Referred material:
AMNH 14413: P4.
AMNH 21985: I2.
_____________________________________________________________________________________
Species: major (RUSSELL, 1937)
Etymology: Latin, major, "greater."
= Cimolomys major RUSSELL, 1937
Holotype: NMC 8742(Not NMC8743)
Locality: Lsd. 10, Sec. 29, Tp.21, R12, W4, Red Deer River Valley, near Steveville, Alberta, Canada.
Horizon: Judith River Formation, Upper Campanian, Late Cretaceous.
Material: A fragment of a left (not a right) dentary containing m1-2 and the roots of the incisor, p3 and p4.
Referred material:
FOX, 1980
Locality: Alberta, Canada.
Horizon: Judith River Formation, Upper Campanian, Late Cretaceous.
Material:
UA 675: RM2.
UA 698: LP4.
UA 747: LM2.
UA 748: LM1
UA 1492: LM2.
UA 1496: Lm1.
UA 1818: RM1.
UA 2001: Lm1.
UA 2144: Lm1.
UA 4220: LP4.
UA 4236: LP4.
UA 4251: LM2.
UA 4254: LM2.
UA 4261: LP4.
UA 5239: RM1.
UA 5264: Rm1.
UA 15158: RP4.
UA 15159: LP3, LP4.
UA 15160: LP4.
UA 15161: LP4.
UA 15162: Rm1.
UA 15163: Rm1.
UA 15164: Rm1.
UA 15165: Rm1.
UA 15166: Lm1.
UA 15167: Rm1.
UA 15168: Rm1.
UA 15169: Rm1.
UA 15170: Rm1.
UA 15171: Lm1.
UA 15172: LM1.
UA 15173: LM1.
UA 15174: RM1.
UA 15175: LM1.
UA 15176: LM1.
UA 15177: LM1.
UA 15178: RM1.
UA 15179: LM2.
UA 15180: LM2.
UA 15181: LP4.
UA 15182: Lp2, Lm1 and Lm2.
UA 15183: LP4.
UA 15184: LP4.
UA 15185: LP4.
UA 15186: Lm2.
UA 15187: Rm2.
UA 15188: Lm2.
UA 15189: Rm2.
NMC 8742: Lm1 and Lm2.
P.65.24.1: Rm2.
KOSTER, CURRIE, EBERTH, BRINKMAN, JOHNSTON & BRAMAN, 1987
Locality: 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, 1992
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:
Number: Not given: 4 M1s, 5 M2s, 11 m2s.
Locality: UCMP V-78094, Chiment 1, Havre Badlands, Hill County, Montana.Horizon: Judith River Formation.
Biostratigraphy:
Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.
Material:
Number: Not given: P4.
Locality: UCMP V-78098, Garbani 1, Havre Badlands, Hill County, Montana.Horizon: Judith River Formation.
Biostratigraphy:
Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.
Material:
Number: Not given: 2 m2s.
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:
Number: Not given: 3 M1, 6 M2s, 5 m2s, 10, m2s.
Locality: UCMP V-82093, Cocolin 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:
Number: Not given: m1.
Locality: UCMP V-82162, Bob’s Ilia, 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:
Number: Not given: M2.
Locality: UCMP V-82165, Coke’s Microsite, 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:
Number: Not given: 2 M2s.
Locality: UCMP V-82225, Garbage Bed, 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:
Number: Not given: M1.
Locality: UCMP V-83157, Put’s Plunder West, 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:
Number: Not given: M2.
SAHNI, 1972
Locality: Clambank Hollow, Chouteau County, Montana.
Horizon: Judith River Formation.
Biostratigraphy:
Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.
Material:
AMNH 77254: Incisor.
AMNH 77247: LP4.
AMNH 77248: LP4.
AMNH 77253: LM1.
AMNH 77265: Left UI.
AMNH 77257: UP4.
AMNH 77255: Upper posterior premolar.
AMNH 77259: UM1.
AMNH 77261: UM2.
AMNH 77264: Calcaneum.
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Species: ferox FOX, 1971
Etymology: Latin, ferox, "wild, bold, fierce."
Holotype: UA 5380
Locality: Locality UA-MR-8, exposed in Verdigris Coulee, approximately 18 miles (19 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 UP4.
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Species: intermedius FOX, 1976
Etymology:
Holotype: UA 12081
Locality: Along the South Saskatchewan River, approximately 30 miles (4.83 km) north of Medicine Hat, and 15 miles (24.1 km) west of Hilda, Alta, Cypress County, Alberta, Canada.
Horizon: Judith River Formation.
Biostratigraphy:
Age: Judithian age, Upper Campanian Stage, Aquilian in age, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.
Material: Fragmentary right mandible with m1-2.
Referred material:
Locality: Lsd. 2, Sec. 9, Tp. 13, R 9, W. 4, approximately 30 miles (48.3 km) west of Medicine Hat, Alberta, Canada.
Horizon: Judith River Formation, Upper Campanian, Late Cretaceous.
Material:
Provincial Museum and Archives of Alberta, Paleontological Collections, Specimen Catalogue Number P72.14.1: Left M1.
= Meniscoessus sp. cf. M. intermedius EATON, 2006
Locality: UMNH VP Locality 11, Websters Flat Locality, Markagunt Plateau, Kane County, Southern Utah.
Horizon: Tibbet Canyon Member, Straight Cliffs Formation.
Biostratigraphy:
Age: Upper Turonian Stage or Lower Coniacian Stage, lowest Senonian subepoch, lower Gulf Epoch, Early Late Cretaceous.
Material:
UMNH VP 5101: M1.
EATON, DIEM, ARCHIBALD, SCHIERUP & MUNK, 1999Locality: UMNH VP Locality 10, Paul’s Locality, Markagunt Plateau, Southern Utah.
Horizon: Tibbet Canyon Member, Straight Cliffs Formation.
Biostratigraphy:
Age: Upper Turonian Stage or Lower Coniacian Stage, lowest Senonian subepoch, lower Gulf Epoch, Early Late Cretaceous.
Material:
UMNH VP 5101: Partial left M1.
FLYNN, 1986
Locality: Locality 76168, Dead Feather, San Juan Basin, New Mexico.
Horizon: Kirtland Formation.
Biostratigraphy:
Age: Kirtlandian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UALP 15639: LUM1.
Locality: Locality 7592, Jacobs Bone Bed, San Juan Basin, New Mexico.Horizon: Kirtland Formation.
Biostratigraphy:
Age: Kirtlandian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UALP 15638: ULM2.
Locality: 7599, Burnham Southe is located about 3 km south of Burnham Trading Post, in exposures bordering Brimhall Wash, San Juan Basin, New Mexico.
Horizon: Kirtland Formation.
Biostratigraphy:
Age: Kirtlandian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
V 2451: ULM2.
V 2457: URM2.
V 2447: LLM1.
V 3161: RU?P2.
LILLEGRAVEN & MCKENNA, 1986
Locality: Barwin Quarry (unnamed AMNH locality; no field numbers), 37 m northwest of Fales Rocks (UW V-81006) locality, Wind River Basin, Natrona County, Wyoming.
Horizon: "Mesaverde" Formation.
Biostratigraphy:
Age: Judithian Age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.
Material:
AMNH 86346: Right UM2.
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Species: collomensis LILLEGRAVEN, 1987
Etymology:
Holotype: UCM 48613
Locality: UC locality 83199, the "Jubb Creek" locality, Moffat County, Colorado.
Horizon: Lower part of the Williams Fork Formation.
Biostratigraphy:
Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.
Material: Left mandibular fragment with m1-2.
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Species: greeni WILSON, 1987
Etymology:
Holotype: SDSM 13034
Locality: SDSM Loc. V701, approximately 3 miles north of Red Owl, South Dakota.
Horizon: Fox Hills Formation.
Biostratigraphy:
Age: Maastrichtian Stage, uppermost Senonian subepoch, Gulf Epoch, Late Cretaceous.
Material: Left M2.
Referred material:
SDSM 13036: Right P4.
SDSM 13310: P4.
SDSM 13311: P4.
SDSM 13035: Left M1.
SDSM 13312: M1.
SDSM 13313: M1.
SDSM 13314: M2.
SDSM 13315: M2.
SDSM 13316: M2.
SDSM 13317: M2.
SDSM 13037: Left p4.
SDSM 13038: Left m1.
SDSM 13318: m1.
SDSM 13319: m1.
SDSM 13320: m1.
SDSM 13321: m1.
SDSM 13322: m1.
SDSM 13039: Right m2.
SDSM 13323: m2.
Incomplete upper incisor, 2 incomplete lower incisors.