 Several species initially classified within or referred to Allosaurus do not belong within the genus . A. medius was named by Marsh in 1888 for " various specimens " from the Early Cretaceous of Maryland , although most of the remains were removed by Richard <unk> Lull to the new ornithopod species <unk> <unk> , except for a tooth . Gilmore considered the tooth <unk> but transferred it to a new species , <unk> medius . The referral was not accepted in the most recent review , and Allosaurus medius was simply listed as a dubious species of theropod . Allosaurus <unk> was described in 1914 by A. N. <unk> on the basis of a bone , later identified as a partial fourth <unk> , from the Early Cretaceous of <unk> , Russia . It was transferred to <unk> in 1990 . 
