After Montellano, 1988, Cifelli, 1990, Johanson, 1994, McKenna & Bell, 1997 and Zonneveld, Gunnell & Bartels, 2000
<==o †Alphadontidae Marshall, Case & Woodburne, 1990 [Alphadontia Archer, 1984; Didelphidae: Alphadontinae Marshall, Case & Woodburne, 1990 sensu McKenna & Bell, 1997] |--o †Albertatherium Fox, 1971 | |-- †A. primus Fox, 1971 | `-- †A. secundus Johanson, 1994 `--o †Alphadon Simpson, 1927 [incl. Protalphadon Cifelli, 1990 sensu McKenna & Bell, 1997] |-- †A. attaragos Lillegraven & McKenna, 1986 |-- †A. austrinum Sigé, 1971 [Peradectes austrinum (Sigé, 1971)] |-- †A. clemensi Eaton, 1993 |-- †A. eatoni Cifelli & de Muizon, 1998 |-- †A. halleyi Sahni, 1972 |-- †A. jasoni Storer, 1991 |-- †A. lillegraveni Eaton, 1993 |-- †A. marshi Simpson, 1927 |-- †A. perexiguus Cifelli, 1994 |-- †A. sahnii Lillegraven & McKenna, 1986 [jr. synon. to A. halleyi Sahni, 1972??] `-- †A. wilsoni Lillegraven, 1969
Reference(s):
- 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. - Cifelli, R. L., 1990: Cretaceous mammals of Southern Utah. I. Marsupials from the Kaiparowits Formation (Judithian).
–Journal of Vertebrate Paleontology: Vol. 10, #3, pp. 295-319 - Dykes, T., 2002-: "Basal" Didelphidae & Co.
–iNet: Mesozoic mammals – an internet directory: http://home.arcor.de/ktdykes/boeometa.htm - Eaton, J. G., 1993: Therian mammals from the Cenomanian (Upper Cretaceous) Dakota Formation, southwestern Utah.
–Journal of Vertebrate Paleontology: Vol. 13, #1, pp. 105-124 - Gazin, C. L., 1976: Mammalian faunal zones of the Bridger Middle Eocene.
–Smithsonian Contributions to Paleobiology: No. 26, pp. iv-25 - Johanson, Z., 1994: New information concerning the Late Cretaceous marsupial Albertatherium Fox, 1971.
–Journal of Vertebrate Paleontology: Vol. 14, #4, pp. 595-602 - McKenna, M. C. & Bell, S. K., (eds.) 1997: Classification of mammals – above the species level.
–Columbia University Press, New York, 1997, xii-631 - Montellano, M., 1988: Alphadon halleyi (Didelphidae, Marsupialia) from the Two Medicine Formation (Late Cretaceous, Judithian) of Montana.
–Journal of Vertebrate Paleontology: Vol. 8, #4, pp. 378-382 - Rougier, G. W., Wible, J. R. & Novacek, M. J., 1998: Implications of Deltatheridium speciments for early marsupial history.
–Nature: Vol. 396, 3 December, pp. 459-463 - Zonneveld, J.-P., Gunnell, G. F. & Bartels, W. S., 2000: Early Eocene fossil vertebrates from the southwestern Green River basin, Lincoln and Uinta Counties, Wyoming.
–Journal of Vertebrate Paleontology: Vol. 20, #2, pp. 369-386