When were fossils of the Pararhabdodon first found?
Pararhabdodon
Pararhabdodon (meaning "near fluted tooth" in reference to "Rhabdodon") is a genus of tsintaosaurin hadrosaurid dinosaur, from the Maastrichtian-age Upper Cretaceous Tremp Formation of Spain. The first remains were discovered from the Sant Romà d’Abella fossil locality and assigned to the genus "Rhabdodon", and later named as the distinct species Pararhabdodon isonensis in 1993. Known material includes assorted postcranial remains, mostly vertebrae, as well as from the skull. Specimens from other sites, including remains from France, a maxilla previously considered the distinct taxon Koutalisaurus kohlerorum, an additional maxilla from another locality, the material assigned to the genera "Blasisaurus" and "Arenysaurus", and the extensive Basturs Poble bonebed have been considered at different times to belong to the species, but all of these assignments have more recently been questioned.
Prognathodon
Gorden L. Bell Jr. conducted the first major phylogenetic analysis of mosasaurs in 1997, utilizing new methodologies and incorporating further taxa described since Russell's 1967 monograph (particularly basal mosasauroids, such as "Aigialosaurus"). Bell recovered "Prognathodon" within the Mosasaurinae, for the first time ever, as a close relative of the genera "Globidens" and "Plesiotylosaurus". The tribe Prognathodontini was synonymized with the Globidensini, another tribe coined by Russell (1967) for "Globidens". Bell was also the first to note that his analysis recovered "Prognathodon", previously believed to be monophyletic, as paraphyletic.