 Several species coined in genera other than Allosaurus are also now thought to be synonymous with A. fragilis . Labrosaurus ferox was named in 1884 by Marsh for an oddly formed partial lower jaw , with a prominent gap in the tooth row at the tip of the jaw , and a rear section greatly expanded and turned down . Later researchers suggested that the bone was <unk> , showing an injury to the living animal , and that part of the unusual form of the rear of the bone was due to plaster reconstruction . It is recognized as most likely a specimen of A. fragilis . Allosaurus valens is a <unk> for <unk> valens accidentally used by Friedrich von <unk> in 1932 ; <unk> valens itself may also <unk> to Allosaurus fragilis , as Gilmore suggested in 1920 . <unk> <unk> , based on a scrap of <unk> Marsh first thought to be a mammalian jaw , may or may not be the same as Allosaurus . 
