The Mammals (Mammalia) - class
(Yinotheria) - subclass
The Monotemes (Monotremata) - order
The
(Steropodontidae)
- family -extinct-
The Platypuses
(Ornithorhynchidae)
- family
The Echidnas
(Tachyglossidae)
- family
(Theriiformes) - subclass
The Marsupials (Marsupialia) - infraclass
The American Opossums
(Didelphimorphia)
- order

(Paucituberculata)
- order
Monito del Monte
(Microbiotheria)
- order
The Marsupial Moles
(Notoryctemorphia)
- order
The Marsupial Carnivores
(Dasyuromorphia)
- order
The Bandicoots & Bilbies
(Peramelemorphia)
- order
The Diprotodont Marsupials
(Diprotodontia)
- order
The Placental Mammals (Placentalia) - infraclass
(Afrotheria) - Magnorder
(Afroinsectiphilia) - superorder
The Tenrecs & Golden Moles
(Afrosoricida)
- order
The Elephant Shrews
(Macroscelidea)
- order
The Aardvark
(Tubulidentata)
- order
(Paenungulata) - superorder
The Hyraxes
(Hyracoidea)
- order
The Elephants
(Proboscidea)
- order
The Dugongs & Manatees
(Sirenia)
- order
(Boreoeutheria) - Magnorder
(Gliriformes) - Grandorder
(Glires) - mirorder
The Rabbits, Hares, & Pikas
(Lagomorpha)
- order
The Rodents
(Rodentia)
- order
(Euarchonta) - Grandorder
The Treeshrews
(Scandentia)
- order
(Glires) - mirorder
The Colugos
(Dermoptera)
- order
The Primates
(Primates)
- order
(Laurasiatheria) - superorder
(Eulipotyphla) - Grandorder
The
(Amphilemuridae)
- family
The West Indian Shrews
(Nesophontidae)
- family
The Solenodons
(Solenodontidae)
- family
The Desmans, Moles & Shrew Moles
(Talpidae)
- family
The Toothed Shrews
(Soricidae)
- family
The Hedgehogs, Moonrats & Gymnures
(Erinaceidae)
- family
(Scrotifera) - Grandorder
The Pangolins
(Pholidota)
- order
The Bats
(Chiroptera)
- order
The Whales & Dolphins
(Cetacea)
- order
The Even-Toed Ungulates
(Artiodactyla)
- order
The Odd-Toed Ungulates
(Perissodactyla)
- order
The Carnivorans
(Carnivora)
- order
(Xenarthra) - Magnorder
The Armadillos
(Cingulata)
- order
The Anteaters & Sloths
(Pilosa)
- order