Pentacosmodon is a mammal genus from the Paleocene of North America, so it lived somewhat after the "age of the dinosaurs". It was a member of the extinct order Multituberculata. It's within the suborder Cimolodonta and family Microcosmodontidae.

The genus Pentacosmodon, named by Jepsen in 1940, is known from the species Pentacosmodon pronus. Fossil remains of this animal have been found in strata dating to the Upper Paleocene of Wyoming (USA) and the Porcupine Hills Formation near the Bow River of Alberta, Canada. This genus was previously placed within family Djadochtatherioidea.


  • Jepsen (1940), "Paleocene faunas of the Polecat Bench Formation, Park County, Wyoming." Proc. of the Am. Philos. Soc. 83, p.217-341.
  • Kielan-Jaworowska Z. & Hurum J.H. (2001), "Phylogeny and Systematics of multituberculate mammals." Paleontology 44, p.389-429.
  • Much of this information has been derived from [1] MESOZOIC MAMMALS: Eucosmodontidae, Microcosmodontidae and Taeniolabidoidea, an Internet directory.
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