Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Order Carnivora Bowdich, 1821 - carnivores
       Suborder Caniformia Kretzoi, 1943
         Family Phocidae Gray, 1821 - true seals
           Genus Pusa Scopoli, 1777
             Pusa hispida (Schreber, 1775) - ringed seal
               1 [Pusa hispida hispida] (Schreber, 1775)
               2 Pusa hispida botnica (Gmelin, 1788)
               3 Pusa hispida ladogensis (Nordquist, 1899)
               4 Pusa hispida ochotensis (Pallas, 1811)
               5 Pusa hispida saimensis (Nordquist, 1899)