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Recently, the taxon Iguanodon atherfieldensis has been subjected to revision. Paul (2007) proposed Mantellisaurus as a new generic name for I. atherfieldensis. The reasoning for this change relied on osteological differences originally regarded as sufficient to distinguish these forms as “osteological species” (Norman, 1986:327). Having proposed the generic name Mantellisaurus, Paul (2008) then extended his taxonomic revision of Wealden iguanodonts by creating an entirely new taxon, Dollodon bampingi (Fig. 2.2) for the gracile skeleton (RBINS R57 [formerly “IRSNB 1551”]; see Norman, 1986) and referred to, historically, as “Iguanodon mantelli” (e.g., Dollo, 1882; Casier, 1960). The first monograph on this specimen (Norman, 1986) referred it to Iguanodon atherfieldensis. The case for erecting the new binomial Dollodon bampingi was supported by a list of diagnostic characters derived from some simplistic outline drawings, some “fleshed-out” restorations of the heads of these animals and the interpretation of photographs of mounted specimens (named “technical restorations” by Paul, 2008:202). Norman (2012) evaluated the diagnostic characters proposed by Paul and demonstrated that none could be considered to be valid, and that on that basis alone, the new name should be considered a nomen dubium: a very similar conclusion was reached independently by McDonald (2012a).