text: Oxynotus japonicus Ka. Yano & Murofushi, 1985 (Japanese roughshark)
  Oxynotus paradoxus Frade, 1929 (sail-fin roughshark)
  Family Somniosidae  (sleeper sharks)
  Genus Centroscymnus Barbosa du Bocage & Brito Capello, 1864
  Centroscymnus coelolepis Barbosa du Bocage & Brito Capello, 1864 (Portuguese dogfish)
  Centroscymnus owstonii Garman, 1906 (rough-skin dogfish)
  Genus Centroselachus Garman, 1913
  Centroselachus crepidater Barbosa du Bocage & Brito Capello, 1864 (long-nose velvet dogfish)
  Genus Scymnodalatias Garrick, 1956
  Scymnodalatias albicauda Taniuchi & Garrick, 1986 (white-tail dogfish)
  Scymnodalatias garricki Kukuev & Konovalenko, 1988 (Azores dogfish)
  Scymnodalatias oligodon Kukuev & Konovalenko, 1988 (sparse-tooth dogfish)
  Scymnodalatias sherwoodi Archey, 1921 (Sherwood's dogfish)
  Genus Scymnodon Barbosa du Bocage & Brito Capello, 1864
  Scymnodon ichiharai Ka. Yano & S. Tanaka (II), 1984 (Japanese velvet dogfish)
  Scymnodon macracanthus Regan, 1906 (large-spine velvet dogfish)
  Scymnodon plunketi Waite, 1910 (Plunket's shark)
  Scymnodon ringens Barbosa du Bocage & Brito Capello, 1864 (knife-tooth dogfish)
  Genus Somniosus Lesueur, 1818
  Somniosus antarcticus Whitley, 1939 (southern sleeper shark)
  Somniosus longus S. Tanaka (I), 1912 (frog shark)
  Somniosus microcephalus Bloch & J. G. Schneider, 1801 (Greenland shark)
  Somniosus pacificus Bigelow & Schroeder, 1944 (Pacific sleeper shark)
  Somniosus rostratus A. Risso, 1827 (little sleeper shark)
  Somniosus sp. A Not yet described (long-nose sleeper shark)
  Genus Zameus D. S. Jordan & Fowler, 1903