''Cimolodon'' is a genus of the extinct

mammal Mammals () are a group of vertebrate animals constituting the class Mammalia (), characterized by the presence of mammary glands which in females produce milk for feeding (nursing) their young, a neocortex (a region of the brain), fur or ...

order of Multituberculata within the suborder Cimolodonta and the family

Cimolodontidae Cimolodontidae is a family of fossil mammals within the extinct order Multituberculata. Representatives are known from the Upper Cretaceous and Paleocene of North America. The family Cimolodontidae was named by Othniel Charles Marsh in 1889 a ...

. Specimens are known from the Late Cretaceous of

North America North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car ...

Systematics

The genus ''Cimolodon'' was named by Othniel Charles Marsh in 1889. Kielan-Jaworowska & Hurum (2001) noted that ''Cimolodon'' seems to be more closely related to members of their "''Paracimexomys'' group than to other ptilodontoideans.

Species

''Cimolodon electus'' (Fox R.C. 1971) is known from the Upper Cretaceous of the Upper Milk River Formation in Alberta, Canada. Possible finds have been reported from New Mexico. ''Cimolodon nitidus'' (Marsh O.C. 1889) is known from Late Cretaceous

strata In geology and related fields, a stratum ( : strata) is a layer of rock or sediment characterized by certain lithologic properties or attributes that distinguish it from adjacent layers from which it is separated by visible surfaces known as ei ...

of the Lance Formation of Wyoming, Utah, Montana and South Dakota (United States and Canada). Synonyms include ''Allacodon lentus'' (Marsh 1889); ''Allacodon rarus'' (Marsh 1892); ''

Cimolomys ''Cimolomys'' is a mammal genus from the Upper Cretaceous of North America. It was a member of the extinct order Multituberculata within the suborder Cimolodonta and family Cimolomyidae. The genus ''Cimolomys'' was named by Othniel Charles Mar ...

bellus'' (Marsh 1889); ''Cimolomys digona'' (Marsh 1899); ''Cimolomys nitidus''; ''Halodon serratus'' (Marsh 1889); ''Nanomyops minitus'' (Marsh 1892); ''Nanomys minitus'' (Marsh 1889); and '' Ptilodus serratus'' (Gidley 1909). ''Cimolodon pervus'' (Marsh O.C. 1892) is also known from the Upper Cretaceous Lance Formation of Wyoming. A specimen referred to as ''C.'' cf. ''nitidus'' has been recovered from the Prince Creek Formation. ''Cimolodon similis'' (Fox R.C. 1971) is known from the Late Cretaceous (Santonian-early Campanian) of Alberta and Utah. ''C. wardi'' is known from the Wahweap Formation of Utah.J. G. Eaton. 2006. Late Cretaceous mammals from Cedar Canyon, southwestern Utah. Late Cretaceous Vertebrates from the Western Interior. New Mexico Museum of Natural History and Science Bulletin 35:373-402 ''Cimolodon akersteni'' is known from the Cenomanian-age Wayan Formation of Idaho.

References

* Simpson (1929), "American Mesozoic Mammalia." ''Mem. Peabody Mus. Nat. Hist.'' iii (i), p. 1-235. {{Taxonbar, from=Q780915 Ptilodontoids Cretaceous mammals of North America Prehistoric mammals of North America Milk River Formation Prehistoric mammal genera