Fig. 6From: Species concept in North American stegosaursGeneric differences between iguanodontids is readily apparent among Ouranosaurus nigeriensis (a), Mantellisaurus atherfieldensis (b) and Iguanodon bernissartensis (c), yet only recently was Mantellisaurus separated from Iguanodon by Paul (2007). Courtesy of Gregory S. Paul. Scale bars 1 mBack to article page