[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 Dalatiidae Gray, 1851 - kitefin sharks
           Genus Somniosus Lesueur, 1818
             1 Somniosus microcephalus (Bloch & Schneider, 1801) - Greenland shark
             2 Somniosus rostratus (Risso, 1826) - little sleeper shark