[Neoselachii] Compagno, 1977 - modern sharks and rays see Cohort Neoselachii Compagno, 1977
   Order Squaliformes Compagno, 1973 - dogfish sharks
     Family Squalidae Blainville, 1816 - dogfish sharks
       Genus Deania Jordan & Snyder, 1902 - longnose dogfish
         1 Deania calceaᵀ (Lowe, 1839) - birdbeak dogfish
         2 Deania histricosa (Garman, 1906) see Deania hystricosa (Garman, 1906)
         3 Deania profundorum (Smith & Radcliffe, 1912) - arrowhead dogfish
         4 Deania quadrispinosum (McCulloch, 1915) - longsnout dogfish