[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988]
     Order Carnivora Bowdich, 1821 - carnivores
       Family Ursidae Batsch, 1788 - bears
         Genus Ursus Linnaeus, 1758 - black, brown, polar, sun, and sloth bears
           Ursus maritimus Phipps, 1774 - polar bear