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The Phascolarctidae (''Phasco'' - pouch or bag, ''larct''- from the Greek ''arctos'' meaning bear) are a family of marsupials of the order Diprotodontia, consisting of only one extant species, the koala,〔 and six well-known fossil species, with another five less well known fossil species, and two fossil species of the genus ''Koobor'', whose taxonomy is debatable but are placed in this group. The closest relatives of the Phascolarctidae are the wombats, which comprise the family Vombatidae. The fossil record of the family dates back to the Middle Miocene or Late Oligocene.〔 ==Classification== Family Phascolarctidae〔 * Genus †''Nimiokoala'' * *†Riversleigh rainforest koala - ''Nimiokoala greystanesi'' * Genus †''Invictokoala'' * *†''Invictokoala monticola'' * Genus †''Madakoala'' * *†''Madakoala robustus'' * *†''Madakoala wellsi'' * *†''Madakoala devisi'' * Genus †''Litokoala'' * *†''Litokoala garyjohnstoni'' * *†''Litokoala kutjamarpensis'' * *†''Litokoala kanunkaensis'' * Genus †''Koobor'' * *†''Koobor jimbarrati'' * *†''Koobor notabilis'' * Genus †''Perikoala'' * *†''Perikoala palankarinnica'' * *†''Perikoala robustus'' * Genus ''Phascolarctos'' * *†''Phascolarctos maris'' * *Koala - ''Phascolarctos cinereus'' * *†Giant koala - ''Phascolarctos stirtoni'' * *†''Phascolarctos yorkensis'' (formerly ''Cundokoala yorkensis'') * Genus †''Priscakoala'' * *†''Priscakoala lucyturnbullae'' 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Phascolarctidae」の詳細全文を読む スポンサード リンク
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