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Order Multituberculata? - extinct Subclass Monotremata (older name Prototheria) Subclass Marsupialia? (older name Metatheria) Order Didelphimorphia? Order Paucituberculata? Order Microbiotheria? Order Dasyuromorphia? Order Peramelemorphia? Order Notoryctemorphia? Order Diprotodontia? Subclass Placentalia? (older name Eutheria) Order Xenarthra? (anteaters, sloths, armadillos; formerly called Edentata) Order Pholidota? (pangolins) Order Chiroptera? (bats) Order Dermoptera? (flying lemurs) Order Primates (apes, monkeys, people) Order Scandentia? (tree shrews) Order Macroscelidea? (elephant shrews) Order Rodentia? (mice, rats, squirrels, porcupines, beavers, etc) Order Lagomorpha? (hares, rabbits, pikas) Order Insectivora? (shrews, moles, hedgehogs, etc) Order Creodonta? - extinct Order Carnivora (dogs, wolves, cats, bears, weasels, seals, walruses) Order Condylarthra? - extinct Order Artiodactyla? (pigs, deer, cattle, goats, sheep, etc) Order Cetacea?(whales, dolphins, porpoises) Order Tubulidentata? (aardvark) Order Perissodactyla (horses, tapirs, rhinoceroses) Order Hyracoidea? (hyraxes, dassies, agouti) Order Proboscidea (elephants, etc) Order Embrythopoda? - extinct Order Demostylia? - extinct Order Sirenia (manatees, dugong, sea cows)
Therapsida? are direct mammal's ancestors, but some scientists consider them to be mammals. In this case, Pelycosauria? are direct mammal's ancestor.
Names Prototheria, Metatheria and Eutheria expressed theory that Placentalia? were descendants of Marsupialia?, which were in turn descendants of Monotlremata?. Because this theory has been refuted, these names are rarely used nowadays.