NHMUK R3078 was referred in 1905 by Arthur Woodward to the species "Cetiosaurus leedsii", as it was from the same geologic formation as other specimens that were assigned to "C. leedsii". Woodward also referred the dorsal vertebrae NHMUK R1984 and the tail tip NHMUK R1967 to the species. In 1927, Huene briefly described the anatomy of the species "C. leedsii", where he noted that it shared many similarities with "Haplocanthosaurus" and was most likely between "Cetiosaurus" proper and the former genus. For this reason, Huene proposed the new genus name "Cetiosauriscus" for the species. To the genus he referred the specimens NHMUK R1984–R1988 and NHMUK R3078.