Jelaskan Ptilodus: multituberculata dari Mamalia dalam bahasa sunda

Pucadelphys andinus: marsupial kawas opposum

Purgatorius: mamalia mirip primata, plaséntal

Ectoconus: mamalia kukuan awal, plaséntal

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Ronald M. Nowak. 1999. Walker's Mammals of the World. éd. ka-6. Johns Hopkins University Press. ISBN 0-8018-5789-9

Géorge Gaylord Simpson. 1945. "The principles of classification and a classification of mammals". Bulletin of the American Museum of Natural History, 85:1–350.

Springer, Mark S., Michael J. Stanhope, Ole Madsen, & Wilfried W. de Jong. 2004. "Molecules consolidate the placental mammal tree". Trends in Ecology and Evolution, 19:430–438. (pdf version)

Vaughan, Terry A., James M. Ryan, & Nicholas J. Capzaplewski. 2000. Mammalogy: Fourth Edition. Saunders College Publishing, 565 pp. ISBN 0-03-025034-X (Brooks Cole, 1999)

Wilson, Don E., & Deéann M. Reeder (eds). 1993. Mammal Species of the World. Smithsonian Institution Press. ISBN 1-56098-217-9