 I. atherfieldensis , described by <unk> <unk> in 1925 , was smaller and less robust than I. bernissartensis , with longer neural spines . It was renamed Mantellisaurus atherfieldensis in 2007 . The Bernissart specimen <unk> <unk> was described as Dollodon <unk> in 2008 , but McDonald and Norman returned Dollodon to <unk> with Mantellisaurus . 
