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Note that Mya is million years ago. For example, "48.6～40.4 Mya" shows a range between 48.6 and 40.4 million years ago. The time range and the epoch are shown in the Geological Time Table.
Phylogenetic Tree of Mammals
- Kingdom Animalia
- Phylum Chordate
- Subphylum Vertebra
- Infraphylum Gnathostomata (Jawed vertebrates)
- Class Mammalia ⇐ Class Reptile (Mammaliaformes)
- Subclass Prototheria (First wild animal)
- Oder Monotreme (
 Platypus,  Echidna; 125 Mya～) Monotreme
- Subclass Allotheria (Other animal)
- Oder Haramiyida Primitive mammal
- Oder Multituberculata (Rodent-like mammals; 203.6～33.9 Mya) Primitive mammal
- Oder Triconodonta (Mesozoic mammals; 167.7～65.5 Mya) Primitive mammal
- Oder Volaticotheria (Gliding mammals; 167.7～150.8 Mya) Primitive mammal
- Oder Gondwanatheria (Early xenarthrans; 70.6～65.5 Mya) Primitive mammal
- Subclass Theria (Wild animal)
- Infraclass Pantotheria
- Order Symmetrodonta (Mesozoic mammals; 203.6～70.6 Mya) Primitive marsupial
- Order Dryolestida (Mesozoic mammals) Primitive marsupial
- Infraclass Metatheria (Marsupials)
- Order Deltatheroida (Basal marsupials; 93.5～65.5 Mya) Primitive marsupial
- Order Yalkaparidontia (Australian marsupials) Primitive marsupial
- Superorder Ameridelphia
- Order Didelphimorphia (99.6 Mya～)
 Opossum
- Order Paucituberculataria (65.5 Mya～)
 Shrew Opossum
- Superorder Australidelphia
- Order Microbiotheria Monito del Monte
- Order Dasyuromorphia (
 Quoll, Dunnart, Numbat; 55.8 Mya～) Marsupial carnivore
- Order Peramelemorphia (
 Bandicoot,  Bilby) Marsupial omnivore
- Order Notoryctemorphia (Marsupial mole) Marsupial mole
- Order Diprotodontia (
 Marsupial Lion,  Koala,  Wombats,  Kangaroos; 23.03 Mya～) Diprotodont
- Order Sparassodonta (Carnivorous mammals; 54～6.8 Mya)
- Infraclass Eutheria (Placentals)
- Order Leptictida (83.5～40.4 Mya)
- Clade Atlantogenata
- Group I: Afrotheria
- Clade Afroinsectiphilia
- Order Macroscelidea (55.8 Mya～)
 Elephant shrew
- Order Afrosoricida (
 Tenrecs, Golden moles; 20.43 Mya～)
- Order Tubulidentata (28.4 Mya～)
 Aardvark
- Clade Paenungulata
- Order Hyracoidea (55.8 Mya～)
 Hyrax
- Order Proboscidea (
 Elephant, Mammoth; 58.7 Mya～)
- Order Sirenia (Dugong, Manatees; 55.8 Mya～)
 Sea-cow
- Order Embrithopoda (Resembling rhinoceroses; 40.4～23.03 Mya) Paenungulata
- Order Desmostylia (Marine mammals; 30.8～7.25 Mya) Paenungulata
- Group II: Xenarthra
- Order Cingulata (55.8 Mya～)
 Armadillo
- Order Pilosa (40.4 Mya～)
- Suborder Vermilingua (
 Anteater)
- Suborder Folivora (
 Sloth,  Grand sloth)
- Clade Boreoeutheria
- Group III: Euarchontoglires
- Superorder Euarchonta
- Order Scandentia
 Treeshrew
- Order Dermoptera (63.3 Mya～)
 Colugo
- Order Plesiadapiformes (Primate's relative; 65～48.6 Mya) Primate
- Order Primates (65 Mya～) Primate
- Suborder Strepsirrhini (non-tarsier prosimians)
- Infraorder Adapiformes (Primitive primates)
- Infraorder Lemuriformes (
 Lemur)
- Infraorder Chiromyiformes (Aye-aye)
- Infraorder Lorisiformes (
 Loris)
- Suborder Haplorrhini
- Infraorder Tarsiiformes (
 Tarsier)
- Infraorder Simiiformes (Simian)
- Parvorder Platyrrhini (
 New World monkey)
- Parvorder Catarrhini ( Old World monkey, Gibbons, Ape, Human)
- Superorder Glires
- Order Anagalida (Ancestor of rodents and lagomorphs; 48.6～37.2 Mya)
- Order Lagomorpha (Pikas, Rabbits,Hares; 58.7 Mya～)
 Rabbit
- Order Rodentia (56.8 Mya～)
 Rodent
- Suborder Anomaluromorpha (Springhare, Scaly-tailed flying squirrel)
- Suborder Castorimorpha (
 Beaver, Pocket gopher, Kangaroo rat)
- Suborder Hystricomorpha (
 Old World porcupine, New World porcupine, Gundi)
- Suborder Myomorpha (Mouse-like rodents)
 Mouse
- Suborder Sciuromorpha (
 Squirrel, Dormouse, Mountain Beaver)
- Group IV: Laurasiatheria
- Order Erinaceomorpha (89.3 Mya～)
 Hedgehog
- Order Soricomorpha (
 Moles,  Shrews, Solenodons; 89.3-0 Mya)
- Clade Ferungulata
- Clade Cetartiodactyla
- Order Cetacea (53 Mya～)
 Whale  Dolphin
- Order Artiodactyla (53 Mya～)
 Even-toed ungulate
- Suborder Suina (
 Pig, Hog)
- Suborder Tylopoda (
 Camel)
- Suborder Cetruminantia (
 Hippopotamus)
- Suborder Ruminantia (
 Deer,  Giraffe, Bovid)
- Order Mesonychid (Large-sized carnivorous mammals) Ungulate
- Order Condylarth (Hoofed animals) Ungulate
- Order Dinocerata (Rhinoceros-like hoofed animals; 56.8～33.9 Mya) Ungulate
- Superorder Meridiungulata
- Order Pyrotheria (Mstodon-like ungulates; 48～21 Mya) Ungulate
- Order Astrapotheria (South American hoofed animals; 58.7～7.25 Mya) Ungulate
- Order Notoungulata (South American hoofed animals; 57～0.011 Mya) Ungulate
- Order Litopterna (Horse-like hoofed animals; 55.8～0.011 Mya) Ungulate
- Clade Pegasoferae
- Order Chiroptera (55.8 Mya～)
- Suborder Megachiroptera (Megabat)
 Megabat
- Suborder Microchiroptera (Microbat) Bat
- Clade Zooamata
- Order Perissodactyla (58.7 Mya～)
 Odd-toed ungulate
- Suborder Hippomorpha (
 Horse)
- Suborder Ceratomorpha (Tapir,
 Rhinocerose)
- Clade Ferae
- Order Pholidota (63.3 Mya～)
 Pangolin
- Order Cimolesta (Resembling Rodents, Weasels or Opossums)
- Order Creodonta (Resembling Carnivora; 63.3～11.1 Mya)
- Order Carnivora (65 Mya～)
- Suborder Miacoidea (
 Saber-toothed cat)
- Suborder Feliformia (
 Cat Families,  Hyena, Mongoose)  Carnivora
- Suborder Caniformia (
 Dog Families,  Bear, Weasel) Carnivora
(Eared seal, Earless seal)  Marine mammal
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