 A. amplexus was named by Gregory S. Paul for giant Morrison allosaur remains , and included in his conception <unk> maximus ( later Saurophaganax ) . A. amplexus was originally coined by Cope in 1878 as the type species of his new genus <unk> , and is based on what is now AMNH <unk> , parts of three vertebrae , a coracoid , and a <unk> . Following Paul 's work , this species has been accepted as a synonym of A. fragilis . 
