 There are also several species left over from the <unk> of Creosaurus and Labrosaurus with Allosaurus . Creosaurus <unk> was named by Lull in 1911 for a <unk> from the Early Cretaceous of Maryland . It is now regarded as a dubious theropod . Labrosaurus fragilis is a typographical error by Marsh ( 1896 ) for Labrosaurus ferox . L. <unk> , named by Marsh in 1896 for a Morrison theropod tooth , which like L. stechowi is now regarded as either Ceratosaurus sp. or a dubious <unk> . 
