The intermediate sauropod "Ornithopsis leedsi" is known from the same section of the formation as "Cetiosauriscus", along with the stegosaurids "Lexovisaurus durobrivensis" and "Loricatosaurus priscus" (which are possibly synonyms), the basal ankylosaur "Sarcolestes leedsi", the ornithopod "Callovosaurus leedsi", and a second unnamed ornithopod taxon. Dinosaur eggs that have not yet been assigned to a taxon are also known from the Lower Oxford Clay. The theropods "Eustreptospondylus" and possibly "Megalosaurus" are also known from the Oxford Clay Formation, but slightly younger deposits (the Middle Member). In addition, the theropod "Metriacanthosaurus" is from an unknown level and age in the formation.