Protungulatum donnaeprotungulatum donnaeden/youtube, protungulatum donnae
Possible Campanian record
Sloan and Van Valen, 1965
Protungulatum donnae is the type species for the Protungulatum genus, an extinct early form of eutherian mammal Though it is by no means the earliest mammal in the fossil record, a 2013 study considers P donnae to be the oldest undisputed placental mammal fossil, though more recent examinations conclude that it was a more basal eutherian and that no placental predates the Paleocene
- ^ O'Leary, Maureen A; Bloch, Jonathan I; Flynn, John J; Gaudin, Timothy J; Giallombardo, Andres; Giannini, Norberto P; Goldberg, Suzann L; Kraatz, Brian P; Luo, Zhe-Xi; Meng, Jin; Novacek, Michael J; Perini, Fernando A; Randall, Zachary S; Rougier, Guillermo; Sargis, Eric J; Silcox, Mary T; Simmons, Nancy b; Spaulding, Micelle; Velazco, Paul M; Weksler, Marcelo; Wible, John r; Cirranello, Andrea L 8 February 2013 "The Placental Mammal Ancestor and the Post–K-Pg Radiation of Placentals" Science 339 6120: 662–667 Bibcode:2013Sci339662O doi:101126/science1229237 PMID 23393258 Retrieved 9 February 2013
- ^ Wilford, John Noble 7 February 2013 "Rat-Size Ancestor Said to Link Man and Beast" New York Times Retrieved 9 February 2013
- ^ Halliday, Thomas J D 2015 "Resolving the relationships of Paleocene placental mammals" Biological Reviews doi:101111/brv12242
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