Genus: Chassternbergia (BAKKER, 1988) OLSHEVSKY, 1991
Etymology: In honor of Charles Sternberg.
= Edmontonia Subgenus Chasternbergia BAKKER, 1988

Species: rugosidens (GILMORE, 1930 ) OLSHEVSKY, 1991
Etymology: Latin, rugosus, "wrinkled" and Latin, dens, "tooth."
= Palaeoscincus rugosidens GILMORE, 1930
= Edmontonia rugosidens (GILMORE, 1930) RUSSELL, 1939
= Panoplosaurus rugosidens (GILMORE, 1930) COOMBS, 1979
= Edmontonia Subgenus Chassternbergia rugosidens (GILMORE, 1930) BAKKER, 1988
= Edmontia rugosidens HUNT & LUCAS, 1992 (sic)

Holotype: USNM 11868

Locality: Sec. 16, T. 37N, R8W, Milk River, Blackfeet Indian Reservation, Glacier County, Montana.

Horizon: Two Medicine Formation.

Biostratigraphy:

Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.

Material: Skull and fragmentary skeleton with armor.
Note: Paleopathology, slightly injured right premaxilla with a distinctive noth with healed bone showieng rounded edges and a fusion of 2 caudal vertebrae from the anterior half of the tail and would have given the animal a ‘kink’ in it’s tail.

First cervical ring; Median, primary and secondary scutes.

A) Second median scute; B, C) laterial pectoral armor; D) Tertiary second lateral scute.

Left second cossified plates, primary and secondary. Figure D of the above illustrations belongs to this series.

Lateral pectoral armor.

Position of pectoral armor.

After Carpenter.

Position of first and second median scutes.

After BAKKER, 1988

Referred material:

COOMBS, 1971

Locality: Alberta Province, Canada.

Horizon: Judith River Formation.

Biostratigraphy:

Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.

Material:

NMC 8879: Partial Skull.

 

CARPENTER, 1990

Locality: Alberta Province, Canada.

Horizon: Judith River Formation.

Biostratigraphy:

Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.

Material:

ROM 5340: Paired first medial scutes.

 

Locality: Near the holotype locality, Blackfeet Indian Reservation, Glacier County, Montana.

Horizon: Judith River Formation.

Biostratigraphy:

Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.

Material:

MOR 433: A partial skull, several vertebrae, and ribs, sarum, a partial scapula, 2 partial humeri, sections of cervical half-ringss, numerious scutes and a bifurcate spine.
Note: Ankylosaur and nodosaur osteoderms are mixed together.

 

CURRIE & RUSSELL, 2005

Locality: Quarry 043, Dinosaur Provincial Park, Newell 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, Late Cretaceous.

Material:

ROM 1215: Skull and skeleton.

 

Locality: Quarry 201, Dinosaur Provincial Park, Newell 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, Late Cretaceous.

Material:

RTMP 91.36.507: Skull.

 

Locality: Quarry 229, Dinosaur Provincial Park, Newell 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, Late Cretaceous.

Material:

RTMP 98.74.1: Skull.

Note: May belong to Panoplosaurus? VICKARYOUS, 2005

 

Locality: Quarry 230, Dinosaur Provincial Park, Newell 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, Late Cretaceous.

Material:

RTMP 98.71.1: Skull and skeleton.

 

Locality: Unknown, Dinosaur Provincial Park, Newell 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, Late Cretaceous.

Material:

UA: Skull.

LAMBE, 1902

Locality: Red Deer River, Alberta Province, Canada.

Horizon: Judith River Formation.

Biostratigraphy:

Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.

Material:

Number: Not given: Dermal plates.

Note: Referred to Sterocephalus tutus.

 

= Edmontonia rugosidens or new species WATABE, NAKAYA, & NAKAHARA, 2000

Locality: Greasewood Creek, Wyoming.

Horizon: Lance Formation.

Biostratigraphy:

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

Material:

Number: Not given: A well preserved skeleton with armor in situ.
Note: The scutes show some pathological traces possibly due to a predator.

 

VICKARYOUS, 2006

Locality: Exact locality not given, Dinosaur Provincial Park, Newell 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, Late Cretaceous.

Material:

RTMP 98.98.01. Skull and right mandibular ramus.

RTMP 2001.12.158: Skull.

AMNH 5381: Disarticulated skull, both mandibles, and various small in situ ostoderms along the throat.

= Edmontonia cf. E. rugosidens WROBLEWSKI,1998

Locality: Western Hanna Basin, Carbon County, South-central Wyoming.

Horizon: Ferris Formation.

Biostratigraphy:

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

Material:

Number: Not given: