[Neoselachii] Compagno, 1977 - modern sharks and rays see Cohort Neoselachii Compagno, 1977
   Order Carcharhiniformes Compagno, 1973 - ground sharks
     Family Triakidae Gray, 1851 - houndsharks
       Genus Mustelus Linck, 1790 - smoothhounds
         01 Mustelus antarcticus Günther, 1870 - gummy shark
         02 Mustelus asterias Cloquet, 1821 - smooth-hound
         03 Mustelus californicus Gill, 1864 - gray smooth-hound
         04 Mustelus canis (Mitchill, 1815) - smooth dog
         05 Mustelus dorsalis Gill, 1864 - sharptooth smoot-hound
         06 Mustelus fasciatus Garman, 1913 - striped smooth-hound
         07 Mustelus griseus Pietschmann, 1908 - Japanese gray smooth hound
         08 Mustelus henlei (Gill, 1863) - brown smooth-hound
         09 Mustelus higmani Springer & Lowe, 1963 - smalleye smooth-hound
         10 Mustelus lenticulatus Phillipps, 1932 - rig
         11 Mustelus lunulatus Jordan & Gilbert, 1883 - sicklefin smooth-hound
         12 Mustelus manazo Bleeker, 1854 - starspotted smooth-hound
         13 Mustelus mento Cope, 1877 - smooth hound
         14 Mustelus mosis Hemprich & Ehrenberg, 1899 - Arabian smooth-hound
         15 Mustelus mustelus (Linnaeus, 1758) - gray mouth dog
         16 Mustelus norrisi Springer, 1940 - Florida smooth-hound
         17 Mustelus palumbes Smith, 1957 - whitespotted smooth-hound
         18 Mustelus punctulatus Risso, 1826 - blackspotted smooth-hound
         19 Mustelus schmitti Springer, 1940 - narrownose smooth-hound
         20 Mustelus whitneyi Chirichigno, 1973 - humpback smooth-hound