to time claims are made about discoveries that, also taking into regard their provenance, might have a provable connection with the Ceratops holotype. In 1995, David Trexler and F.G. Sweeney noted that complete material from a bonebed that had been found in Montana could enable Ceratops to be reexamined. The site, known as the Mansfield Bonebed, belongs to the same stratigraphic level as the one that yielded the original Ceratops remains. It had initially been interpreted as containing Styracosaurus, but what earlier authors considered the frill spikes of Styracosaurus turned out to be chasmosaurine orbital horns. Trexler and Sweeney pointed out that these horns closely resembled those of Ceratops, and could allow the genus to be rescued as a valid name. The ceratopsids in the bonebed were later referred to the genus Albertaceratops, and later re-classified in their own genus, Medusaceratops. In 1999, Paul Penkalski and Peter Dodson concluded that Ceratops, despite being a nomen dubium because the material is too meager, appeared closely related to Avaceratops which may even be a juvenile Ceratops; there is not enough material to prove it. Later species In 1889 Marsh named a second species of Ceratops: Ceratops horridus. This would almost immediately in a subsequent article be renamed into Triceratops horridus. Ceratops horridus is thus the type species of Triceratops. In the same article Marsh renamed Bison alticornis, his misidentification of ceratopsid material for a giant bovid, into Ceratops alticornis. In 1890 Marsh renamed Hadrosaurus paucidens into Ceratops paucidens; but the original assessment of Hatcher that this represented hadrosaurid material is probably correct. In 1905 Hatcher renamed three Monoclonius species into Ceratops species: Monoclonius recurvicornis Cope 1889 became Ceratops recurvicornis; Monoclonius belli Lambe 1902 was made Ceratops belli and Monoclonius canadensis Lambe 1902 was renamed Ceratops canadensis. C. canadensis later was made the separate genus Eoceratops, and C. belli was made the separate genus Chasmosaurus; in 1925 William King Gregory concluded that Ceratops and Chasmosaurus were identical, but this was rejected by most researchers. In 2005, remarkably well preserved cranial and postcranial elements of a Judithian ceratopsian were discovered in Fergus County, Montana. Nicknamed "Judith", preliminary examination suggested a close affinity with C. montanus. The locality has been determined to be on or in close proximity to the stratigraphic layer of C. montanus, and not too many miles away. In 2016, the new animal was named Spiclypeus, and the authors stated that it