In 1998 Kenneth Carpenter and James Kirkland, in a review of North American Lower Cretaceous ankylosaurs, considered it tentatively valid as an unusually large nodosaurid, larger than all those described before.[4] Carpenter (2001) retained it as a valid nodosaurid, but did not employ it in his phylogenetic analysis.[5] Vickaryous et al. (2004), in a review of armored dinosaurs, considered it to be dubious without comment.[6] West and Tibert, however, followed this with a preliminary account of a morphometric study that found it to be a unique genus.[7]
Additional specimens
Carpenter and Kirkland (1998) listed 12 additional teeth from the same area as the holotype tooth, and tentatively added a robust tibia (USNM 9154) to the genus. They found the lack of armor found in the Arundel to be peculiar, but noted that fossils are rare in that formation anyway.[4] In 2018, three new ankylosaur teeth described from the Potomac Formation were assigned to Priconodon crassus based on their similarity to the holotype.[8] In 2023, large ankylosaur fossils (including a vertebra and a osteroderms) were announced to be found at Dinosaur Park by John-Paul Hodnett,[9][10] which may potentially represent additional specimens of Priconodon.[11]
^Marsh, O.C. (1888). Notice of a new genus of Sauropoda and other new dinosaurs from the Potomac Formation. American Journal of Science 135:89-94.
^Coombs, Jr., W.P. (1978). The families of the ornithischian dinosaur order Ankylosauria. Palaeontology 21(1):143-170.
^ abCarpenter, K., and Kirkland, J.I. (1998). Review of Lower and middle Cretaceous ankylosaurs from North America. In: Lucas, S.G., Kirkland, J.I., and Estep, J.W. (eds.). Lower and Middle Cretaceous Terrestrial Ecosystems. New Mexico Museum of Natural History and Science Bulletin 14:249-270.
^Carpenter, K. (2001). Phylogenetic analysis of the Ankylosauria. In: Carpenter, K. (ed.). The Armored Dinosaurs. Indiana University Press:Bloomington 455-483. ISBN0-253-33964-2
^Vickaryous, M.K., Maryańska, T., and Weishampel, D.B., (2004). Ankylosauria. In: Weishampel, D.B., Dodson, P., and Osmólska, H. (eds.). The Dinosauria (second edition). University of California Press:Berkeley 363-392. ISBN0-520-24209-2
