NHMUK) R4992, including only isolated teeth sharing the same morphology as those from the holotype. Some bones that were unidentified by Galton & Coombs (1981) were described as a fragment of a vertebra in 2018 by Raven & Maidment. The teeth do not bear any autapomorphies of Paranthodon, and were referred to an indeterminate stegosaurid in 2008. The teeth were identified in 2018 as also lacking any distinct stegosaurian features, and were thus designated as Thyreophora indeterminate. The Mugher Mudstone of Ethiopia was screened in the 1990s by the University of California Museum of Paleontology, and in it were discovered multiple dinosaur teeth, pertaining to many groups of taxa. The locality has been described as "the largest and most complete record of dinosaur fossils from a Late Jurassic African locality outside of Tendaguru". Two of the partial teeth discovered were referred to Paranthodon by Lee Hall and Mark Goodwin in 2011. The reasons for the referral to Paranthodon were not discussed. Description Paranthodon was a small relative of larger stegosaurids such as Stegosaurus. Thomas R. Holtz Jr. estimated that the animal was long and weighed between . The snout is elongated, though not extremely so, and convex on top. The back of the premaxilla is long and broad, and the external nares are large. The teeth have a prominent primary ridge. The fossilised nasal and maxillary bones are relatively complete, and an incomplete premaxilla is also preserved. The partial snout resembles Stegosaurus in its large posterior premaxillary process and the extension of the palate. Stegosaurus was the only stegosaurid known from adequate cranial material to compare with Paranthodon during the 1981 review of the taxon, and even though their resemblance is great, tooth morphology is very distinguishing among the stegosaurians. For example, cranial material is known from Stegosaurus, Paranthodon, Kentrosaurus, and Tuojiangosaurus, and the tooth morphology differs in all of them. The premaxilla of Paranthodon is incomplete, but the anterior process is sinuous and curves ventrally. This is similar to in Miragaia, Huayangosaurus, the ankylosaur Silvisaurus, and Heterodontosaurus, but unlike in Chungkingosaurus, Stegosaurus, Edmontonia and Lesothosaurus. The premaxilla also lacks any teeth, like in every stegosaur except Huayangosaurus where the premaxilla is preserved. Like in Huayangosaurus but not Stegosaurus or Hesperosaurus, the nasal fenestra faces anterolaterally, being visible from the front and sides. The naris is longer than wide like in other stegosaurs, and also has a smooth internal surface,