Class Mammalia Linnaeus, 1758 - mammals
   01 Order Monotremata Bonaparte, 1837 - monotremes
   02 Order Marsupialia Jameson, 1818 - marsupials see Cohort Marsupialia Jameson, 1818
   03 Order Insectivora Bowdich, 1821 - insectivores see Superorder Insectivora Bowdich, 1821
   04 Order Macroscelidea Butler, 1956 - elephant shrews
   05 Order Dermoptera Dobson, 1883
   06 Order Chiroptera Blumenbach, 1779 - bats
   07 Order Scandentia Wagner, 1855 - tree shrews
   08 Order Primates Linnaeus, 1758 - primates
   09 Order Xenarthra Cope, 1889 - xenarthrans see Magnorder Xenarthra Cope, 1889
   10 Order Pholidota Weber, 1904 - pangolins
   11 Order Lagomorpha Brandt, 1855 - lagomorphs
   12 Order Rodentia Bowdich, 1821 - rodents
   13 Order Cetacea Brisson, 1762 - whales, dolphins, and porpoises see Infraorder Cetacea Brisson, 1762
   14 Order Carnivora Bowdich, 1821 - carnivores
   15 Order Pinnipedia Illiger, 1811 - seals, sea lions, and walrus see Parvorder Pinnipedia Illiger, 1811
   16 Order Tubulidentata Huxley, 1872 - aardvark
   17 Order Proboscidea Owen, 1859 - elephants
   18 Order Hyracoidea Huxley, 1869 - hyraxes
   19 Order Sirenia Gill, 1872 - sea cows
   20 Order Perissodactyla Owen, 1848 - odd-toed ungulates
   21 Order Artiodactyla Owen, 1848 - even-toed ungulates see Order Cetartiodactyla Montgelard, Catzeflis & Douzery, 1997