Gregory S. Paul reassessed the material as pertaining to a large species of Allosaurus in 1988 (which he classified as Allosaurus amplexus). Other authors have gone further and considered E. amplexus as simply a large individual of Allosaurus fragilis. In 2010, Gregory S. Paul and Kenneth Carpenter noted that the E. amplexus specimen comes from higher in the Morrison Formation than the type specimen of Allosaurus fragilis, and is therefore "probably a different taxon".
The material was reassessed by Gregory S. Paul in 1988 as pertaining to a large species of Allosaurus, which he classified as Allosaurus amplexus. Other researchers have suggested that E. amplexus might be just a large individual of Allosaurus fragilis. In 2010, Paul and Carpenter determined that the E. amplexus specimen came from higher in the Morrison Formation than the type specimen of Allosaurus fragilis, suggesting it is a different taxon.