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The evolution of reproduction in marsupials, and speculation about the ancestral state of mammalian reproduction, have engaged discussion since the end of the 19th century. Both sexes possess a cloaca , [ 17 ] although modified by connecting to a urogenital sac and having a separate anal region in most species. [ 18 ]
Microbiotheriidae is a family of australidelphian marsupials represented by only one extant species, the monito del monte, and a number of extinct species known from fossils in South America, Western Antarctica, and northeastern Australia.
Marsupials also have a pair of marsupial bones (sometimes called "epipubic bones"), which support the pouch in females. But these are not unique to marsupials, since they have been found in fossils of multituberculates, monotremes, and even eutherians — so they are probably a common ancestral feature that disappeared at some point after the ...
Marsupial moles, the Notoryctidae / n oʊ t ə ˈ r ɪ k t ɪ d iː / family, are two species of highly specialized marsupial mammals that are found in the Australian interior. [2] They are small burrowing marsupials that anatomically converge on fossorial placental mammals, such as extant golden moles (Chrysochloridae) and extinct epoicotheres ().
The marsupial thylacine (Tasmanian tiger or Tasmanian wolf) had many resemblances to placental canids. [ 10 ] Several mammal groups have independently evolved prickly protrusions of the skin – echidnas ( monotremes ), the insectivorous hedgehogs , some tenrecs (a diverse group of shrew-like Malagasy mammals), Old World porcupines ( rodents ...
The Macropodidae are an extant family of marsupial with the distinction of the ability to move bipedally on the hind legs, sometimes by jumping, as well as quadrupedally. . They are herbivores, but some fossil genera like Ekaltadeta are hypothesised to have been carnivores
Diprotodon is a marsupial in the order Diprotodontia, [d] suborder Vombatiformes (wombats and koalas), and infraorder Vombatomorphia (wombats and allies). It is unclear how different groups of vombatiformes are related to each other because the most-completely known members—living or extinct—are exceptionally derived (highly specialised forms that are quite different from their last common ...
Metatheria (from Greek μετά-, metá-'changed' and θηρίον, thēríon 'beast'; lit. ' changed beasts ') is a mammalian clade that includes all mammals more closely related to marsupials than to placentals.