Genus: Animantarx CARPENTER, KIRKLAND, BURGE & BIRD, 1999
Etymology: Latin, Animant, “living”, and Latin, arx, “fortress or citadel”. The name is based on Richard Swann Lull’s observation regarding ankylosaurs, that “[a]s an animated citadel, these animals mush have been practically unassailable…” (Lull, 1914).
= Nodosauridae gen. sp indet. CARPENTER, & KIRKLAND, 1998

Species: ramaljonesi CARPENTER, KIRKLAND, BURGE & BIRD, 1999
Etymology: In honor of Ramal Jones who discovered the specimen using a modified scintillometer in an area with no bones exposed (See Jones and Burge, 1995).

Holotype: CEUM 6228

Locality: Carol site (42EM366V), Utah.

Horizon: Mussentuchit Member, Uppermost Cedar Mountain Formation.

Biostratigraphy:

Age: Mussentuchitan age, Uppermost Albian-Lowermost Cenomanian Stage, Upper Gallic subepoch, Lowest Gulf Epoch, Late Early to Early Middle Cretaceous.

Material: Partial skull and right mandible, cervical and dorsal vertebrae, ribs, both scapula-coracoids, fragment of sternal plate, right humerus, left ilium with ischium and femur.