"Cetiosaurus glymptonensis", named on the basis of nine middle-distal caudal centra from the Forest Marble Formation of Oxfordshire, England, was referred to "Cetiosauriscus" by McIntosh in 1990. These caudal vertebrae were considered to be more elongate than those of "Cetiosaurus oxoniensis", but caudal length proportions vary significantly throughout the tail and in different taxa, "Apatosaurus", "Diplodocus" and "Cetiosauriscus" having similarly elongate caudal vertebrae. The more anterior caudals have a large ridge two-thirds up the centrum and a smaller ridge one-third up. These ridges are similar to the middle caudals of "Cetiosauriscus". Still, they are absent in caudals of the same size and proportions, and because of this difference the species was concluded to be separate from "Cetiosauriscus" by Upchurch and Martin in 2003. "Cetiosaurus" "glymptonensis" is considered to be Eusauropoda "incertae sedis" by Upchurch and Martin (2003), Weishampel and colleagues (2004) and Whitlock (2011), and is in need of a new genus name because it has a single diagnostic feature, the lateral ridges.