Barrett, Paul M.Butler, Richard J.Yates, Adam M.Baron, Matthew G.Choiniere, Jonah N.2016-03-022016-03-022016-032410-4418http://hdl.handle.net/10539/19886We describe new specimens of the basal ornithischian dinosaur Lesothosaurus diagnosticus Galton, 1978 collected from a bone bed in the Fouriesburg district of the Free State, South Africa. The material was collected from the upper Elliot Formation (Early Jurassic) and represents the remains of at least three different individuals. These individuals are larger in body size than those already known in museum collections and offer additional information on cranial ontogeny in the taxon. Moreover, they are similar in size to the sympatric taxon Stormbergia dangershoeki. The discovery of three individuals at this locality might imply group-living behaviour in this early ornithischian.enElliot FormationStormbergia dangershoekigroup-living behaviourherbivoreearly dinosaursArticle