Phylum Chordata Bateson, 1885 - chordates Subphylum Vertebrata Cuvier, 1812 - vertebrates Class Chondrichthyes Huxley, 1880 - cartilaginous fishes Order Squaliformes Compagno, 1973 - dogfish sharks Family Dalatiidae Gray, 1851 - kitefin sharks Genus Squaliolus Smith & Radcliffe, 1912 Squaliolus laticaudus Smith & Radcliffe, 1912 - spined pigmy shark