[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Pisces
     Class Chondrichthyes Huxley, 1880 - cartilaginous fishes
       Order Squaliformes Compagno, 1973 - dogfish sharks
         Family Squalidae Blainville, 1816 - dogfish sharks
           Genus Squalus Linnaeus, 1758 - spiny dogfishes
             1 Squalus acanthias Linnaeus, 1758 - piked dogfish
             2 Squalus blainville (Risso, 1826) - longnose spurdog
             3 Squalus megalops (Macleay, 1881) - shortnose spurdog