<==o PAUCITUBERCULATA Ameghino, 1894 [Polydolopimorphia Marshall, in Archer, ed., 1982]
   |--o CAENOLESTOIDEA Trouessant, 1898 sensu Osborn, 1910 (pussipäästäiset)
   |  |-- Caenolestidae Trouessant, 1898 [Synonyms] (pussipäästäiset)
   |  `--+-- †Palaeothentidae Sinclair, 1906 [Epanorthidae Ameghino, 1889]
   |     `-- †Abderitidae Ameghino, 1889
   `--o POLYDOLOPIMORPHIA
      |?- †Protodidelphidae Marshall, 1987 [Didelphidae: Protodidelphinae? Marshall, 1987]
      |--o †POLYDOLOPOIDEA Ameghino, 1897 sensu Clemens & Marshall, 1976
      |  |-- †Sillustania Crochet & Sigé, 1996 Sillustaniidae Crochet & Sigé, 1996 [monotypic]
      |  `--o †POLYDOLOPIFORMES Kinman, 1994
      |     |-- †Polydolopidae Ameghino, 1897 [incl. Promysopidae Ameghino, 1902] (antarktiksen pussipäästäiset)
      |     `--+-- †Bonabartheriidae Pascual, 1980 [monotypic]
      |        `-- †Prepidolopidae Pascual, 1980
      `--o †SIMPSONITHERIA Szalay, in Szalay, Novacek & McKenna, eds., 1993
         |--o †ARGYROLAGOIDEA Ameghino, 1904 sensu Simpson, 1970 [Groeberioidea Clemens & Marshall, 1976; Patagonioidea Pascual & Carlini, 1987; Groeberida Pascual, Goin & Carlini, 1994]
         |  |?- †Gashterniidae
         |  |?- †Argyrolagidae Ameghino, 1904
         |  `-- †Groeberiidae Patterson, 1952 sensu Flynn & Wyss, 1999 [Groeberioidea Clemens & Marshall, 1976; Patagonioidea Pascual & Carlini, 1987; Groeberida Pascual, Goin & Carlini, 1994]
         `--o †CAROLOAMEGHINIOIDEA Ameghino, 1901 sensu Marshall, in Archer, 1987
            |-- †Glasbiidae Clemens, 1966 sensu Archer, 1984 [monogenetic]
            `-- Caroloameghiidae Ameghino, 1901


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 Vertebrate paleontology and evolution.
--W. H. Freeman and company, New York, 1988, 698.

    Flynn, J. J., & Wyss, A. R., 1999: New marsupials from the Eocene-
Oligocene transition of the Andean Main Range, Chile.
--Journal of Vertebrate Paleontolgy: Vol. 19, #3, pp. 533 - 549

McKenna, M. C. & Bell, S. K., (eds.) 1997: Classification of mammals – above the species level.

–Columbia University Press, New York, 1997, xii-631
 
    de Muizon, C. & Cifelli, R. L., 2000:
The "condylarths" (archaic Ungulata, Mammalia) from the early Palaeocene
of Tiupampa (Bolivia): implications on the origin of the South American ungulates
–Geodiversitas: Vol. 22, #1, pp. 47-150