Species: ? occidentalis ESTES & SANCHIZ, 1982
Etymology: Latin, occidentalis,"western."

Holotype: UCMP 55704

Locality: UCMP V-5620, Lull Quarry, near the head of a tributary of Buck Creek, Powder River Basin, Niobrara County (Formerly Converse County), Wyoming.
Note: Incorrectly listed as UCMP V-5720 by Estes & Sanchiz, 1982 (GARDNER, 2008).

Horizon: Lance Formation.

Biostratigraphy:

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

Material: Right ilium.

Referred material:

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, Upper Senonian subepoch, Upper Upper Gulf epoch, Late Cretaceous.

Material:

UCMP 55705: Left ilium.

 

Locality: Bug Creek Anthills (BCA), 80 feet below the Tullock Formation in the west half of Section 9, T22N, R43E, McCone County, Montana.

Horizon: Hell Creek Formation.

Biostratigraphy:

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

Material:

MCZ 3653: Right ilium.

HOLMAN, 2003/GARDNER, 2000

Locality: Bug Creek Anthills, McCone County, Montana.

Horizon: Hell Creek Formation.

Biostratigraphy:

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

Material:

UALVP 40163: Fused atlas and first trunk vertebra.

 

= (?) Palaeobatrachus occidentalis LARSON, BRINKMAN & BELL, 2010

Locality: Albertosaurus bonebed, Alberta Province, Canada.

Horizon: Horseshoe Canyon Formation, Edmonton Group.

Biostratigraphy:

Age: Early Maastrichtian Stage, Late Senonian Subepoch, Late Gulf Epoch, Late Cretaceous.

Material:

RTMP 2000.045.0038: Partial right ilium.

RTMP 2000.045.0101: Urostyle.

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