Australidelphia Temporal range: 61.6–0 Ma PreꞒ Ꞓ O S D C P T J K Pg N Early Paleocene to present[1]
A swamp wallaby
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Infraclass:	Marsupialia
Superorder:	Australidelphia Szalay 1982
Orders
Microbiotheria †Polydolopimorphia? Eomarsupialia Archer, 1984[2] Diprotodontia Agreodontia Beck et al., 2014[2] Dasyuromorphia Notoryctemorphia Peramelemorphia

Australidelphia is the superorder that contains roughly three-quarters of all marsupials, including all those native to Australasia and a single species – the monito del monte – from South America. All other American marsupials are members of the Ameridelphia. Analysis of retrotransposon insertion sites in the nuclear DNA of a variety of marsupials has shown that the South American monito del monte's lineage is the most basal of the superorder.^[3][4]

The Australian australidelphians form a clade, for which the name Euaustralidelphia ("true Australidelphia") has been proposed (the branching order within this group is yet to be determined).^[4] The study also showed that the most basal of all marsupial orders are the other two South American groups (Didelphimorphia and Paucituberculata, with the former probably branching first). This indicates that Australidelphia arose in South America along with the other major divisions of extant marsupials, and likely reached Australia via Antarctica in a single dispersal event after Microbiotheria split off.^[3][4]

Phylogeny of living Australidelphia based on the work of May-Collado, Kilpatrick & Agnarsson 2015^[5] with extinct clades from Black et al. 2012^[6]

(*)This clade has been called Agreodontia by other authors since 2014.

The orders within this group are listed below:

• Genera †Djarthia Godthelp, Wroe & Archer 1999
• Order †Yalkaparidontia Archer, Hand & Godthelp 1988
  • Family †Yalkaparidontidae Archer, Hand & Godthelp 1988
• ?Order Microbiotheria (1 species)
  • ?Family Microbiotheriidae: monito del monte
• Order Dasyuromorphia (71 species)
  • Family †Thylacinidae: thylacine
  • Family Dasyuridae: antechinuses, quolls, dunnarts, Tasmanian devil, and allies
  • Family Myrmecobiidae: numbat
• Order Peramelemorphia (21 species)
  • Family Thylacomyidae: bilbies
  • Family †Chaeropodidae: pig-footed bandicoots
  • Family Peramelidae: bandicoots and allies
• Order Notoryctemorphia (2 species)
  • Family Notoryctidae: marsupial moles
• Order Diprotodontia (117 species)
  • Family Phascolarctidae: koala
  • Family Vombatidae: wombats
  • Family Phalangeridae: brushtail possums and cuscuses
  • Family Burramyidae: pygmy possums
  • Family Tarsipedidae: honey possum
  • Family Petauridae: striped possum, Leadbeater's possum, yellow-bellied glider, sugar glider, mahogany glider, squirrel glider
  • Family Pseudocheiridae: ringtailed possums and allies
  • Family Potoridae: potoroos, rat kangaroos, bettongs
  • Family Acrobatidae: feathertail glider and feather-tailed possum
  • Family Hypsiprymnodontidae: musky rat-kangaroo
  • Family Macropodidae: kangaroos, wallabies, and allies
  • Family †Thylacoleonidae: marsupial lions
  • Family †Palorchestidae: marsupial tapirs
  • Family †Diprotodontidae: giant wombats

v t e Metatheria
Kingdom: Animalia Phylum: Chordata Class: Mammalia Subclass: Theria Synapsida see Synapsida Cynodontia see Cynodontia Mammalia see Mammalia Metatheria see below↓
Metatheria Metatheria †Adinodon †Archaeonothos †Esteslestes †Ghamidtherium †Holoclemensia? †Kasserinotherium †Protalphadon †Sinodelphys? †Deltatheroida Pappotherium? Deltatheridiidae Atokatheridium? Deltatheridium Deltatheroides Gurbanodelta Lotheridium Nanocuris Oklatheridium? Prodeltitheridium Sulestes Tsagandelta Marsupialiformes †Adelodelphys †Aenigmadelphys †Anchistodelphys †Andinodelphys †Arcantiodelphys †Camptomus? †Glasbius †Gurlin Tsav skull †Iugomortiferum †Jaskhadelphys †Mayulestes †Pucadelphys †Sinbadelphys †Sparassodonta see below↓ †Asiatheriidae Asiatherium Kokopellia †Archimetatheria Iqualadelphis Stagodontidae Didelphodon Eobrasilia? Eodelphis Fumodelphodon Hoodootherium Pariadens? Pediomyoidea Aquiladelphis Austropediomys Dakotadens Monodelphopsis Pediomys Protolambda Scalaridelphys Unnuakomys †Peradectidae Armintodelphys Didelphidectes Mimoperadectes Nanodelphys Peradectes Siamoperadectes †Alphadontidae Albertatherium Alphadon Eoalphadon Turgidodon †Herpetotheriidae Amphiperatherium Asiadidelphis Copedelphys Ectocentrocristus Entomacodon Galatiadelphys Golerdelphys Herpetotherium Indodelphis Maastrichtidelphys Morotodon? Nortedelphys Peratherium Rumiodon? Swaindelphys Thylacodon †Anatoliadelphyidae Anatoliadelphys Orhaniyeia †Polydolopimorphia see below↓ Marsupialia Ameridelphia Didelphimorphia Paucituberculata Australidelphia
Sparassodonta Sparassodonta Allqokirus Argyrolestes Hondadelphys Nemolestes Patene Procladosictis Stylocynus Hathliacynidae Acyon Australogale Borhyaenidium Chasicostylus Cladosictis Notictis Notocynus Notogale Perathereutes Pseudonotictis Sallacyon Sipalocyon Borhyaenoidea Angelocabrerus Chlorocyon Dukecynus Fredszalaya Lycopsis Pharsophorus Plesiofelis Prothylacinus Pseudolycopsis Pseudothylacynus Borhyaenidae Acrocyon Arctodictis Australohyaena Borhyaena Eutemnodus? Proborhyaenidae Arminiheringia Callistoe Paraborhyaena Proborhyaena Thylacosmilidae Anachlysictis Eomakhaira Patagosmilus Thylacosmilus
Polydolopimorphia Polydolopimorphia Apeirodon? Bobbschaefferia Caroloameghinia Carolocoutoia Guggenheimia Gashternia Hatcheritherium Palangania Procaroloameghinia Protodidelphis Pujatodon? Reigia Robertbutleria Wamradolops Zeusdelphys Bonapartheriiformes Bonapartheriidae Bonapartherium Epidolops Argyrolagidae Anargyrolagus Argyrolagus Hondalagus Microtragulus Proargyrolagus Chulpasiinae Chulpasia Thylacotinga Prepidolopidae Incadolops Perrodelphys Prepidolops Punadolops Seumandia Rosendolopidae Hondonadia Rosendolops Polydolopiformes Polydolopidae Amphidolops Antarctodolops Eudolops Eurydolops Hypodolops Kramadolops Parabderites Polydolops Pseudolops Sillustaniidae Roberthoffstetteria Sillustania

v t e Agreodontia
Kingdom: Animalia Phylum: Chordata Class: Mammalia Superorder: Australidelphia
Notoryctidae †Naraboryctes Notoryctes Peramelemorphia †Bulungu †Chaeropus †Galadi †Kutjamarcoot †Madju †Numbigilga? †Silvicultor †Yarala Thylacomyidae †Bulbadon? †Ischnodon †Liyamayi Macrotis Peramelidae †Crash Echymipera Isoodon Microperoryctes Perameles Peroryctes Rhynchomeles Dasyuromorphia †Ankotarinja? †Dasylurinja †Joculusium †Keeuna? †Malleodectes †Mayigriphus Myrmecobius †Wakamatha †Thylacinidae Badjcinus? Maximucinus Muribacinus Mutpuracinus? Ngamalacinus Nimbacinus Thylacinus Tyarrpecinus Wabulacinus Dasyuridae †Barinya †Ganbulanyi? †Glaucodon †Urrayira Sminthopsinae Planigale Sminthopsini Antechinomys Ningaui Sminthopsis Dasyurinae †Whollydooleya? Phascogalini Antechinus Murexia Phascogale Dasyurini Dasycercus Dasykaluta Dasyuroides Dasyurus Myoictis Neophascogale Parantechinus Phascolosorex Pseudantechinus Sarcophilus