Species: elegans MARSH, 1889
Etymology: Latin, elegans, "elegant, fine."

Holotype: YPM 11866 (CMCVF)

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: Broken and heavily weathered upper molar.

Neotype: CM 11658: Part of a right upper jaw with M2-4.

Paratype: 2877

Locality: Converse County, Wyoming.

Horizon: Lance Formation.

Biostratigraphy:

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

Material: Portion of left lower jaw containing last molar.

Referred material:

ARCHIBALD, 1982

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 117630: RUM1.

UCMP 17631: RLM3?

UCMP 117629: Left dentary with LP1, LM1, LM2 and trigonid fragment.

 

Locality: V73078, Engdahl 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 108970: RLM4.

 

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 47478: Fragment of maxilla with UM1-3.

UCMP 47049: Fragment of maxilla with UM3-4.

UCMP 46265: Fragment of maxilla with UM1.

UCMP 51335: Fragment of maxilla with UM1.

UCMP 47471: Fragment of maxilla with UM3.

UCMP 51335: Fragment of maxilla with UM3.

UCMP 46883: Fragment of a left dentary, LM1- LM3, inclusive of a juvenile.

UCMP 47035: Fragment of right dentary with LM1-LM3, inclusive.

UCMP 51406: Fragment of a right dentary with LM3 and LM4.

Numbers: Not given: plus 84 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:

UCMP 50293: Fragment of maxilla with UM1-4.

UCMP 51435: Fragment of maxilla with UM1-2.

Numbers: Not given: plus 12 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:

AMNH 58739: Fragment maxilla with UP3 and UM1.

KU 14945: Fragment of maxilla with UP3 and UM1.

AMNH 58768: Fragment of maxilla with UM3-4.

AMNH 58809: Fragment of dentary with LP2, LP3, LM2 and LM3.

Numbers: Not given: Plus 45 isolated teeth.

 

 

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

Horizon: Lance Formation.

Biostratigraphy:

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

Material:

Numbers: Not given: Isolated teeth.

 

CLEMENS, 1991

Locality: On the Colville river, north of Brooks Range, North slope of Alaska.

Horizon:

Biostratigraphy:

Age: Late Cretaceous.

Material:

Numbers: Not given: Teeth.

 

cf. P. elegans FOX, 1979

Locality: Near Irvine, Cypress 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,

Material:

UA 14813: Incomplete upper molar.

 

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 22728: LM1.

UALVP 22726: UM2.

UALVP 22727: UM2.

 

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 16059: LMx.

UALVP 16060: UM2.

UALVP 22811: LM2?

UALVP 22812: UM2?

 

Localities: KUA-1, 22, 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:

UA 3869, 3545: UP2.

UA 3342: UP3.

UA 2227: UM1.

UA 3706: UM3.

UA 3946: LM1.

UA 2365, 2816, 4056: LM2.

 

= P. elegans or “Pediomys” cooki 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 802: Left dentary with m1 and m2.

 

Locality: Q. V. 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 875: Right dentary with m3.

 

JOHNSTON & FOX, 1984

Locality: MHBT Quarry, near the village of Ravenscrag, Saskatchewan, Canada.

Horizon: Lower Ravenscrag Formation.

Biostratigraphy:

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

Material:

UA 16060: M2.

UA 16059: Talonid of m2 or m3.

 

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:

P2004.486: LM1.

P2004.487, P2004.488: LM2.

P1927.680: LM3.

P1927.777, P2004.489: LM4.

P2004.490, P2004.491: RM4.

P1927.179, P1927.367: LM1, M2, or M3.

P1927.18, P2004.31: RM1, M2, or M3.

P2004.72, P2004,495: Lm1.

P1927.379, P1927.382, P2004.8, P2004.495: Rm1.

P1927.383, P1927.510: Rm2.

P2004.496: Lm3.

P1927.207: RMm.

P1927.192: Lm4.

P1927.668: Rm4.

P2004.11, P2004.492, P2004.493: Lm1, m2, or m3.

P1927.352, P1927.761, P2004.482: Rm1, m2, or m3.

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