†Zenostephanus Callomon, Donovan & van den Hoek Ostende 2009
Callomon, Donovan & van den Hoek Ostende 2009. Zenostephanus, a new name for the genus Xenostephanus Arkell and Callomon, 1963 (Mollusca, Cephalopoda), preoccupied by Xenostephanus Simpson, Minoprio and Patterson, 1962 (Mammalia). Palaeontology (Oxford), 52(3), May 2009: 671-672