Species: vorax MARSH, 1889
Etymology:
= Didelphops vorax MARSH, 1889

Holotype: YPM 11827

Locality: Mammal locality no 1, Wyoming.

Horizon: Lance Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material: Upper molar and inscor and fragmentary skeleton.

Referred material:

ARCHIBALD, 1982

Locality: V72207, V72208, V72212, V73087, V73090, V73103, V75173, V75178, and V7616, LACM locs. 3083, 3116, Garfield County, Montana.

Horizon: Hell Creek Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material: 10 isolated teeth (LACM and UCMP specimens) from various LACM and UCMP localities, UCMP 117670, right dentary fragment with LP3; five edentulous jaw Fragments from various ACM and UCMP localities.

 

CLEMENS, 1966

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 46421: Fragment of mandible.

UCMP 46880: Fragment of mandible.

UCMP 51579: Fragment of mandible.

UCMP 53896: Fragment of skull.

plus 68 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:

UA 1600: Fragment of maxilla with UM1, M2, M3 and alveoli for UP3 and UM4.

UCMP 54462: Fragment of mandible.

Numbers: Not given: plus 70 isolated teeth.

 

Locality: UCMP V-5820, Kent 484, found on the surface near the top of the east side of a small draw on the south side of the prominent hill northeast of the J. Krejci ranch house, Wyoming.

Horizon: Lance Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

UCMP 51441: Fragment of mandible.

 

Localities: UCMP V-5002, V-5004, V-5618, V-5619, V-5625, V-5709, V-5713, V-5715, V-5820, and Peterson's quarry of LULL 1915, Wyoming.

Locality: UCMP V-5003, S 1/2, Sec. 20, T37N, R64W, Lance Creek, Powder River Basin, Niobrara County, Wyoming.

Localities: UCMP V-5616, Altman Blowout, this large blowout, site of the UCMP field-party camps form 1956 to 1960, is just east of the crest of the divide separating Lance Creek and Hancock Creek and 100 yards east of a dirt road. Fossils were found in anthills, talus, and sandstone exposed in the blowout, which is in the NE 1/4, Sec. 9, T37N, R64W, Eastern Wyoming.7

Locality: UCMP 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.

Locality: UCMP V-5623, Curiosity Point, anthills and talus found along the southern side of a twin-leaked erosional remnant of cross-stratified sandstone approximately 200 years north of a dirt road,
Wyoming.

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.

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: 53 isolated teeth.

 

CLEMENS, 1968

Locality: Lower Hell Creek number 1, Maloney Hill quadrangle, Garfield County, Montana.

Horizon: Hell Creek Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

LACM 15433: A fragment of a left mandibular ramus lacking the part of the symphyseal region anterior to the canine with p 2-3, m2 and trigonoid of m4.

 

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 22730: LM2?

 

HUNTER & ARCHIBALD, 2002

Locality: PTRM locality V89004, North Dakota.

Horizon: Hell Creek Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

PTRM 3012: Left p2.

 

Locality: PTRM locality V89003, Pretty Butte locailty, North Dakota.

Horizon: Hell Creek Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

PTRM 1290: Right maxillary fragment with M4.

 

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: Right m4.

 

HUNTER & PEARSON, 1996

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:

Pioneer Trails Regional Museum, Bowman, North Dakota, PTRM:

PTRM-599: RM2

PTRM-1230: LM2 missing parastylar region.

PTRM-1262: RM# labial fragment.

PtRM-2114: Pp2.

PTRM-2118: Lm2.

PTRM-1250: RmX talonid.

HUNTER & ARCHIBALD, 2002

PTRM 2106: Left dp3.

PTRM 3023: Left M3.

 

HUNTER, HARTMAN & KRAUSE, 1997

Locality: Muddy Tork Locality, Makoshika State Park, Williston Basin, Dawson County, Montana.

Horizon: Hell Creek Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

MOR 877: Lm2.

MOR 867: Rm2.

 

Locality: Specific locality unknown, Makoshika State Park, Williston Basin, Dawson County, Montana.

Horizon: Hell Creek Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

MOR 884, 885: RP3.

MOR 886: Rm3.

MOR 887: Rm4.

 

LILLEGRAVEN, 1969

Localities: KUA-2, 18, 23, UA-2, 3, Alberta Province, Canada.

Horizon: Scollard Formation, Uppermost Edmonton Group.

Biostratigraphy:

Age: Lancian Age, uppermost Maastrichtian Stage, uppermost Senonian subepoch, Upper Upper Gulf Epoch, Late Cretaceous.

Material:

UA 648: UP1.

UA 1987: UP3.

UA 1985: Fragmentary mandible with LC1, LM2.

UA 3731, 3787: LC1.

UA 649: LDP3.

UA 1986a, 1991: LP3.

UA 2301: LM1.

UA 1986b: LM2.

UA 2893: LM3.

 

LOFGREN, 1995

Locality: 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:

UCMP 13495: Left maxillary fragment with complete or partial alveoli for C, and P1-3.

UCMP 134793: Left edentulous dentary fragment.

UCMP 134794: Maxillary fragment with labial alveoli of Mx.

1 m4 fragment, 1 p1 fragment 1 p1, 1 Mx fragment, 1P3.

 

STORER, 1991

Locality: Gryde Local locality, Farm of Mr. Greg Gryde in Legal Subdivision 11, Section 19, Township 4, Range 18 West of the 3rd Meridian, Saskatchewan Province, Canada.

Horizon: Frenchman Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

P1927.201: Rp2.

P1927.137: Rps.

P1927.347: Rm2.

 

TRIEBOLD, 1997

Locality: Sandy Site, Harding County, South Dakota.

Horizon: Hell Creek Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

Number: Not given:

 

WILSON, EKDALE, HOGANSON, CALEDE, & VANDER LINDEN, 2016

Locality: NDGS locality 27, 3.54 km northeast of Marmarth, Slope County, North Dakota.

Horizon: Hell Creek Formation.

Biostratigraphy: Lancian NA Land Mammal Age.

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

NDGS 431: A partial cranium with parts o fsygomata, maxillae, palate an dleft P3-M4.

 

Locality: Wayne's X Triceratops locality (UWBM locality C1526), 17.24 km southwest of Rhame, Bowman County, northwestern North Dakota.

Horizon: Hell Creek Formation.

Biostratigraphy: Lancian NA Land Mammal Age.

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

UWBM 94084: In complete rostrum with paired paremaxillae and anterior parts of the maxillae and nasals. The left and right I1 and canines, the left P1-P3, and right P1-2 are preserved.

 

Locality: Bug Creek area, McCone Couty, northeastern Montana:

Horizon: Hell Creek Formation.

Biostratigraphy: Lancian NA Land Mammal Age.

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

SCNHM VMMa 20: Fragmant of a left anterior jugal and maxilla that includes an associate dP2, P2-M2 and alveoli for M3 and M4.

 

Locality: Second Level locality (UWBM locality C1692 = UCMP locality V87101), McGuire Creek area, McCone County, northeastern Montana.

Horizon: Hell Creek Formation.

Biostratigraphy: Lancian NA Land Mammal Age.

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

UMBM 94500: A fragment of a left anterior jugal and maxilla with part of the palatal process, the P3-M2 and alveoli for M3-M4.

WHITMORE, 1988

Locality: 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 12374: Left P3.

SDSM 12373: Left c1.

SDSM 12375: Left dp3.

 

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.

Material:

SDSM 12364: m2.

SDSM 12362: Left p?

SDSM 12363: Right m2.

 

= Didelphodon ferox MARSH, 1889
Etymology:
= Didelphops ferox MARSH, 1889 (sic)

Holotype: USNM 2883

Locality: Wyoming.

Horizon: Laramie Formation.

Biostratigraphy:

Age: Lancian Age, upper Maastrichtian Stage, uppermost Senonian Subepoch, Upper Upper Gulf Epoch, Late Cretaceous.

Material: Right lower jaw.

 

= Cimolestes curtus MARSH, 1889
Etymology:
= Diaphorodon curtus (MARSH, 1889) SIMPSON, 1925

Holotype: YPM 11774

Locality: Niobrara County, Wyoming.

Horizon: Lance Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material: Lower molar.

 

= Stagodon validus MARSH, 1889
Etymology:

Holotype: USNM 2136

Locality: Wyoming.

Horizon: Lance Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material: Anterior portion of right lower jaw containing broken canine and p1, p2.

 

= Stagodon nitor MARSH, 1889
Etymology:

Holotype:

Locality: Niobrara County, Wyoming.

Horizon: Lance Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material: Premolar.

 

= Stagodon tomidus MARSH, 1889
Etymology:
= Didelphodon tomidus (MARSH, 1889)

Holotype:

Locality: Wyoming.

Horizon: Laramie Formation.

Biostratigraphy:

Age: Lancian Age, upper Maastrichtian Stage, uppermost Senonian Subepoch, Upper Upper Gulf Epoch, Late Cretaceous.

Material: Upper premolar.

_____________________________________________________________________________________

Species: conulus (MARSH, 1892)
Etymology:
= Stagodon conulus MARSH, 1892

Holotype:

Locality: Wyoming.

Horizon: Laramie Formation.

Biostratigraphy:

Age: Lancian Age, upper Maastrichtian Stage, uppermost Senonian Subepoch, Upper Upper Gulf Epoch, Late Cretaceous.

Material: Anterior portion of lower jaw with teeth.
_____________________________________________________________________________________

Species: padanicus (COPE, 1892)
Etymology:
= Thlaeodon padanicus COPE, 1892

Holotype: AMNH 3013

Locality: South Dakota.

Horizon: Lance Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material: Part of left lower jaw with m3, p3, and roots of p2, and associated fragment of left maxilla with P3 and broken M1.
_____________________________________________________________________________________

Species: coyi FOX & NAYLOR, 1986
Etymology: In honor of Mr. Clive Coy of the Royal Tyrrell Museum of Paleontology, who found the specimen.

Holotype: RTMP 86-64-1

Locality: Michichi Creek, at locality RTMP HC-10, NE 1/4, Sec. 22, Tp. 29, Rge. 19, W 4th Mer., Wheatland County, Alberta Province, Canada.

Horizon: Horseshoe Canyon Formation, Edmonton Group.

Biostratigraphy:

Age: Edmontonian age, lower Maastrichtian Stage, Upper Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Note: Horseshoe Canyon Formation, approximately 107 m above the contact of the Horseshoe Canyon Formation with the marine Bearpaw Formation, within member “A” of OWER (1960) and between coal seams 7 and 8 of GIBSON (1977), Early Maastrichtian (Edmontonian, RUSSELL, 1975), Late Cretaceous.

Material: Incomplete right dentary containing p3, m3-4, and alveoli for an incisor, c, p1-2, and m1-2.

Referred material:

FOX & NAYLOR, 2006

RTMP 90.12.29: An incomplete left dentary with heavily worn and broken p3, alveoli form1-4, and canine, p1? and p2.

 

Locality: RTMP locality HC-4, NE 1/4, sec. 4, Tp. 29, Rge. 20, W 4sth Mer., near Newcastle, Wheatland County, Alberta Province, Canada.

Horizon: Horseshoe Canyon Formation, Edmonton Group.

Biostratigraphy:

Age: Edmontonian age, lower Maastrichtian Stage, Upper Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Note: Horseshoe Canyon Formation, approximately 107 m above the contact of the Horseshoe Canyon Formation with the marine Bearpaw Formation, within member “A” of OWER (1960) and between coal seams 7 and 8 of GIBSON (1977), Early Maastrichtian (Edmontonian, RUSSELL, 1975), Late Cretaceous.

RTMP 83-33-7: A fragment of a left dentary having p3, m2, isolated left m3-4? And associated tooth fragments.

RTMP 83-33-10: Posterior part of a right p3.

 

Locality: Paintearth Creek, Paintearth County, Alberta Province, Canada.

Horizon: Horseshoe Canyon Formation, Edmonton Group.

Biostratigraphy:

Age: Edmontonian age, lower Maastrichtian Stage, Upper Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

RTMP 91.166.1: An incomplete right dentary containing p1-3, m1-2, m4 (broken), and roots of the canine, 2 incisors, and m3 contained in thier alveoli.

 

Locality: Loc. KUA-1, SW `/4, SE 1/4, sec 18, T34N, R21W, Stettler County, Alberta Province, Canada.

Horizon: Scollard Formation, Uppermost Edmonton Group.

Biostratigraphy:

Age: Lancian Age, uppermost Maastrichtian Stage, uppermost Senonian subepoch, Upper Upper Gulf Epoch, Late Cretaceous.

Material:

RTMP 94.125.125: Incomplete right maxilla wiht P3, M1 and damaged M2.