[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 Mustelus mustelus (Linnaeus, 1758) - gray mouth dog