Richard Lydekker ran across these bones when cataloguing the Fox collection and named them Calamospondylus, noting their similarity to those of Coelurus.[1] Unfortunately, Calamospondylus had already been coined in 1866 (ironically by Reverend Fox himself, the very man honored in Lydekker's species name).[2] Lydekker renamed it in 1891 to its present title.[3] He also at this time provisionally referred to it a tibia, BMNH R186, which may be from a basal coelurosaurian like a compsognathid.[4] It has also been regarded as a Tyrannosauroid much like Eotyrannus, which is also found here.