Genus: Hesperonychus LONGRICH & CURRIE, 2009
Etymology: Latin, hesperus, "west" and Greek, onychos, "claw."

Species: elizabethae LONGRICH & CURRIE, 2009
Etymology: In honor of the late Dr. Elizabeth Nichollis, who discovered the holotype.

Holotype: UALVP 48778

Locality: South side of the Red Deer River, 20 km east of Dinosaur Provincial Park, Newell County, Alberta Province, Canada.

Horizon: Dinosaur Park Formation, upper Belly River Group.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

A) Ventral; B) Anterior; C) Right laterial; D) Posterior views.

Material: A partial pelvic girdle comprising of the pubes and ilia.

Note: The specimen has a paleopathology; the right pubic shaft has an unusal swelling not seen on the left side, and is considered to be a well-healed fracture.

Referred material:

Locality: Cripple Creek (near Onefour), Cypress County, Southeastern Alberta Province, Canada.

Horizon: Dinosaur Park Formation, upper Belly River Group.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

RTMP 1989.116.65: Phalanx II-1.

 

Locality: Manyberries, Forty Mile County, Southern Alberta Province, Canada.

Horizo: Belly River Group.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

RTMP 1966.19.22: Phalanx II-1.

 

Locality: Irvine Mammal Locality, Cypress County, Alberta Province, Canada.

Horizon: Upper Dinosaur Park Formation, upper Belly River Group.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

UALVP 50687 (UALVP 50049, this number is in table 3): Phalanx II-1.

UALV 50686 (UALVP 50048, this number is in table 3): Phalanx II-3.

 

Locality: Dinosaur Provincial Park, Newell County, Alberta Province, Canada.

Horizon: Belly River Group.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

RTMP 1992.36.61, RTMP 1983.67.7, RTMP 1991.50.143, RTMP 1988.50.34: Phalanx II-2.

RTMP 1991.50.105, RTMP 1980.16.1880, RTM 1980.8.205, RTM 2000.12.100: Pedal phalanx II-3.

 

Locality: Devil's Coulee, Warner County, Southern Alberta Province, Canada.

Horizon: Oldman Formation, Belly River Group.

Note: Equivalent to the Dinosaur Park Formation.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

RTMP 1995.92.9: Pedal phalanx II-3.

 

Locality: Stevevile Railroad Grade, northwest of Dinosaur Provincial Park, Newell County, Alberta Province, Canada.

Horizon: Dinosaur Park Formation, upper Belly River Group.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

RTMP 1988.36.68: : Phalanx II-3.

 

Locality: Onefour, Cypress County, Southeastern Alberta Province, Canada.

Horizon: Belly River Group.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

RTMP 1990.107.15: Phalanx II-3.

 

Locality: Sandy Point, Dinosaur Provincial Park, Newell County, Alberta Province, Canada.

Horizon: Belly River Group.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

RTMP 1979.10.6: Phalanx II-3.

Note: This number was not in table 3, but was in the text.

RTMP 1995.092.0009: Phalanx II-3.