Genus: Polythorax COPE, 1876 (nomen dubium)
Etymology:
Genus: missuriensis COPE, 1876 (nomen dubium)
Etymology:
Holotype:
Locality: Judith River Basin, Montana.
Horizon: Judith River Formation.
Biostratigraphy:
Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.
Material: Plastron and fragmentary carapace.