|Named By:||Frederick A. Lucas in 1902|
|Time Period:||Early Cretaceous, 130 Ma|
|Location:||USA, South Dakota - Lakota Formation|
|Size:||Uncertain due to incomplete remains, but possibly up to 1.2 meters tall at the hips|
|Fossil(s):||Partial post cranial remains|
|Classification:||| Chordata | Reptilia | Dinosauria | Ornithischia | Thyreophora | Ankylosauria | Nodosauridae | Polacanthinae ||
|Also known as:||| Stegosaurus marshi ||
Hoplitosaurus (meaning "Hoplite lizard") was a genus of armored dinosaur related to Polacanthus. It was named from a partial skeleton found in the ?Barremian-age Lower Cretaceous Lakota Formation of Custer County, South Dakota. It is an obscure genus which has been subject to some misinterpretation of its damaged remains. Although there was a push to synonymize it with Polacanthus in the late 1980s-early 1990s, Hoplitosaurus has been accepted as a valid albeit poorly known genus in more recent reviews.