Australidelphia is a superorder of marsupials encompassing about three-quarters of all living marsupial species, including all those native to Australasia and one South American species, the monito del monte. Unlike other American marsupials, which belong to the Ameridelphia, Australidelphia’s lineage emerged in South America, with genetic evidence (retrotransposon insertion sites) showing the monito del monte as its most ancient branch.[3][4]

Within this superorder, the Australian members form a distinct group (clade) named Eomarsupialia,[2] though their internal relationships (branching order) is yet to be determined.[4] Studies suggest Australidelphia originated in South America alongside other major marsupial groups, likely dispersing to Australia via Antarctica in a single event after the monito’s lineage (Microbiotheria) diverged, leaving other South American orders (Didelphimorphia and Paucituberculata) as more basal.[3][4]

Phylogeny

The following cladogram is a phylogeny of Australidelphia based on the work of May-Collado, Kilpatrick & Agnarsson 2015,[5] with extinct clades from Black et al. 2012.[6]

Australidelphia

Taxonomy

The orders within this group are listed below:

References

  1. ^ "PBDB". paleobiodb.org. Retrieved 2021-07-13.
  2. ^ a b c Beck, R. M. D.; Travouillon, K. J.; Aplin, K. P.; Godthelp, H.; Archer, M. (2014). "The Osteology and Systematics of the Enigmatic Australian Oligo-Miocene Metatherian Yalkaparidon (Yalkaparidontidae; Yalkaparidontia; ?Australidelphia; Marsupialia)" (PDF). Journal of Mammalian Evolution. 21 (2): 127–172. doi:10.1007/s10914-013-9236-3. S2CID 18490996.
  3. ^ a b Schiewe, Jessie (2010-07-28). "Australia's marsupials originated in what is now South America, study says". Los Angeles Times. Archived from the original on 1 August 2010. Retrieved 2010-08-01.
  4. ^ a b c Nilsson, M. A.; Churakov, G.; Sommer, M.; Van Tran, N.; Zemann, A.; Brosius, J.; Schmitz, J. (2010-07-27). Penny, David (ed.). "Tracking Marsupial Evolution Using Archaic Genomic Retroposon Insertions". PLOS Biology. 8 (7): e1000436. doi:10.1371/journal.pbio.1000436. PMC 2910653. PMID 20668664.
  5. ^ May-Collado; et al. (2015). "Mammals from 'down under': a multi-gene species-level phylogeny of marsupial mammals (Mammalia, Metatheria)". PeerJ. 3 (e805): e805. doi:10.7717/peerj.805. PMC 4349131. PMID 25755933.
  6. ^ Black; et al. (2012). "The Rise of Australian Marsupials: A Synopsis of Biostratigraphic, Phylogenetic, Palaeoecologic and Palaeobiogeographic Understanding". Earth and Life. Springer Netherlands. pp. 983–1078. doi:10.1007/978-90-481-3428-1_35. ISBN 9789048134274.
Allikas: http://en.wikipedia.org/wiki/Australidelphia
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