Metatheria
Metatheria hija infraklassi ta' mammiferi marsupjali, fil-klassi Mammalia u fis-sottoklassi Theria. Il-Metatheria tiġbor fiha żewġ superordnijiet l-Australidelphia u l-Ameridelphia u seba' ordnijiet li huma id-Didelphimorphia, il-Paucituberculata, il-Microbiotheria, id-Dasyuromorphia, il-Peramelemorphia, in-Notoryctemorphia, u d-Diprotodontia. Din l-infraklassi flimkien mal-Eutheria jiffurmaw is-sottoklassi Theria.

Il-Metatheria tinkludi fiha l-ispeċij marsupjali kollha eżistenti, kemm dawk estinti kif ukoll dawk estanti.

Klassifikazzjoni 

 Infraklassi Metatheria
 Superordni Ameridelphia
 Ordni Didelphimorphia
 Familja Didelphidae (opossumi)
 Ordni Paucituberculata
 Familja Caenolestidae (opossumi ġriedem ta' geddumhom twil)
 Superordni Australidelphia
 Ordni Microbiotheria
 Familja Microbiotheriidae (kolokolo)
 Ordni Dasyuromorphia
 Familja Thylacinidae (Tilaċin) 
 Familja Dasyuridae (Xitan Tażmanjan)
 Familja Myrmecobiidae (Numbat)
 Ordni Peramelemorphia
 Familja Thylacomyidae (Bandikuti fniek jew Bilbijiet)
 Familja Chaeropodidae (Bandikut ta' saqajh ta' ħanżir)
 Familja Peramelidae (Bandikuti)
 Ordni Notoryctemorphia 
 Familja Notoryctidae (Talpi marsupjali)
 Ordni Diprotodontia 
 Familja Phascolarctidae (Kola)
 Familja Vombatidae (Wombati)
 Familja Phalangeridae (Possum ta' denbu xkupilja u kuskus)
 Familja Burramyidae (Possumi nani)
 Familja Tarsipedidae (Possum tal-għasel)
 Familja Petauridae (Possum ta' Leadbeater,Planatur taz-zokkor)
 Familja Pseudocheiridae (Possumi ta' denbhom biċ-ċriki)
 Familja Potoridae (Potorù, Kangarù far, Bettong)
 Familja Acrobatidae (Planatur ta' denbu pinna)
 Familja Hypsiprymnodontidae (Kangarù far tal-misk)
 Familja Macropodidae (Kangarù, Wallabi, Kwokka)

Ara wkoll 

 Marsupialia
 Australidelphia
 Ameridelphia
 Marsupjal

Referenzi 
 McKenna MC & Bell SK, (1997), Classification of Mammals Above the Species Level. Columbia University Press. 
 1990. Marsupials. Pp. 210-211 in B. Grzimek, ed. Grzimek's Encyclopedia of Mammals, Vol. 1, 1st Edition. New York: Mcgraw-Hill. 
 Aplin, K., M. Archer. 1987. Recent advances in marsupial systematics with a new syncretic classification. Pp. xv-lxxii in M. Archer, ed. Possums and Opossums: Studies in Evolution, Vol. 1. Chipping Norton: Surrey Beatty and Sons PTY Limited. 
 Clutton-Brock, T. 1991. The Evolution of Parental Care. Princeton: Princeton University Press. 
 Lillegraven, J. 1975. Biological considerations of the marsupial-placental dichotomy. Evolution, 29: 707. 
 Moeller, H. 1990. Marsupials: Introduction. Pp. 212-219 in B. Grzimek, ed. Grzimek's Encyclopedia of Mammals, Vol. 1, 1st Edition. New York: Mcgraw-Hill. 
 Nowak, R. 1991. Order Marsupialia. Pp. 10-113 in Walker's Mammals of the World, Vol. 1, 5th Edition. Baltimore: Johns Hopkins University Press. 
 Parker, P. 1977. An ecological comparison of marsupial and placental patterns of reproduction. B. Stonehouse, D. Gilmore, eds. The Biology of Marsupials. London: T. Macmillan. 
 Thenius, E. 1990. Marsupials: Phylogeny. Pp. 219-231 in B. Grzimek, ed. Grzimek's Encyclopedia of Mammals, Vol. 1, 1st Edition. New York: m. 
 Vaughan, T., J. Ryan, N. Czaplewski. 2000. Mammalogy, 4th Edition. Toronto: Brooks Cole. 
 Wilson, D., D. Reeder. 1993. Mammal Species of the World, A Taxonomic and Geographic Reference. 2nd edition. Washington, D. C.: Smithsonian Institution Press.
 Burkitt, J. H., 1995: Mammals: A world listing of living and extinct species.iNet: Cougar Hill Sanctuary Association: Online Library: mammals.pdf http://www.cougarhillweb.org/resource.html/
 Carroll, R. L., 1988: Vertebrate paleontology and evolution.W. H. Freeman and company, New York, 1988, 698
 Carroll, R. L., 1988: Appendix. 594-648 in Carroll, R. L., 1988: Vertebrate paleontology and evolution.W. H. Freeman and company, New York, 1988, 698
 McKenna, M. C. & Bell, S. K., (eds.) 1997: Classification of mammals – above the species level. Columbia University Press, New York, 1997, xii-631
 Nowak, R. M., 1991: Walker's Mammals of the World; Part 1.The Johns Hopkins University Press, Baltimore and London, 1991, xlviii-642-lxiii
 Nowak, R. M., 1991: Walker's mammals of the World; Part 2.The Johns Hopkins University Press, Baltimore and London, 1991, xii-643-1629

Ħoloq esterni 
 Western Australian Mammal Species