Species: tenuis MARSH, 1889
Etymology:

Holotype: USNM 2139

Locality: UCMP 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: Fragmentary left dentary with part of the canine, alveolus of LP1 and LP2-4.

Referred material:

YPM 10685: 2 molars.

 

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 117649: RUM2 lacking the parastylar lobe.

UCMP 117650: RLP4.

UCMP 117651: LLM2.

UCMP 117652: LMx talonid.

 

 

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 587877: Fragmentary left mandible with LP2-4 and LM1-2.

 

LILLEGRAVEN, 1969

Localities: KUA-1, 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 3147: UP4 (Destroyed).

UA 4081: Fragmentary maxilla with partial UM1 and complete UM2.

UA 3802: UM2.

UA 3714: Fragmentary mandible with LP4.

UA 3721: Fragmentary mandible with LM2-3.

UA 3688: Fragmentary mandible with LM2.

UA 4083: ?LP2.

UA 4047: LP4.

UA 3688: LM2.

 

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:

P2004.30: RP3.

P2004.565: RM1.

P2004.18: ME or M2.

P2004.566: Rp2.

P1927.625: Lp3.

P2004.567: Rp3.

P2004.281: Rm1 or m2.

 

WOOD, 1990, WOOD & CLEMENS, 2001

Locality: Flat Creek Locality 5 (V-136091), Garfield County, Montana.

Horizon: Hell Creek Formation.

Biostratigraphy:

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

Late Cretaceous.

Material:

UCMP 136091: Fragmentary maxilla with M2-3.