Liotomus
Encyclopedia
Liotomus is a genus
of extinct mammal
from the Paleocene
epoch (early Cenozoic
era). It lived in Europe
and North America
, and was a member of the extinct order Multituberculata
, lying within the suborder Cimolodonta
and possibly the family
Cimolodontidae
.
The genus Liotomus was named by E. D. Cope in 1884. It has also been known as Neoctenacodon (Lemoine 1891); Neoplagiaulax
(partly); and Parectypodus
(partly). This genus is sometimes placed within family Eucosmodontidae
(Jepsen 1940).
Genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...
of extinct mammal
Mammal
Mammals are members of a class of air-breathing vertebrate animals characterised by the possession of endothermy, hair, three middle ear bones, and mammary glands functional in mothers with young...
from the Paleocene
Paleocene
The Paleocene or Palaeocene, the "early recent", is a geologic epoch that lasted from about . It is the first epoch of the Palaeogene Period in the modern Cenozoic Era...
epoch (early Cenozoic
Cenozoic
The Cenozoic era is the current and most recent of the three Phanerozoic geological eras and covers the period from 65.5 mya to the present. The era began in the wake of the Cretaceous–Tertiary extinction event at the end of the Cretaceous that saw the demise of the last non-avian dinosaurs and...
era). It lived in Europe
Europe
Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...
and North America
North America
North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...
, and was a member of the extinct order Multituberculata
Multituberculata
The Multituberculata were a group of rodent-like mammals that existed for approximately one hundred and twenty million years—the longest fossil history of any mammal lineage—but were eventually outcompeted by rodents, becoming extinct during the early Oligocene. At least 200 species are...
, lying within the suborder Cimolodonta
Cimolodonta
The Cimolodonta are a taxon of extinct mammals that lived from the Cretaceous to the Eocene. They were some of the more derived members of the extinct order Multituberculata. They probably lived something of a rodent-like existence until their ecological niche was assumed by true rodents...
and possibly the family
Family (biology)
In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...
Cimolodontidae
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. There is some doubt as to whether Cimolodon is within this taxon. If not, the name of the family would still be valid...
.
The genus Liotomus was named by E. D. Cope in 1884. It has also been known as Neoctenacodon (Lemoine 1891); Neoplagiaulax
Neoplagiaulax
Neoplagiaulax is a mammal genus from the Paleocene of Europe and North America. In the case of the latter continent, there may possibly be some slightly earlier, Upper Cretaceous material too. It existed in the age immediately following the extinction of the last dinosaurs...
(partly); and Parectypodus
Parectypodus
Parectypodus is a genus of extinct mammal that lived from the Paleocene to the Eocene of North America. Some of the known fossil material may also be from the Upper Cretaceous. It was named by G.L. Jepsen in 1930....
(partly). This genus is sometimes placed within family Eucosmodontidae
Eucosmodontidae
Eucosmodontidae is a poorly preserved family of fossil mammals within the extinct order Multituberculata. Representatives are known from strata dating from the Upper Cretaceous through the Lower Eocene of North America, as well as the Paleocene to Eocene of Europe. The family is part of the...
(Jepsen 1940).
Liotomus marshi
- Described by: Lemoine, 1882; Cope, E.D., 1884
- Alternate names: Neoctenacodon marshi and Neoplagiaulax marshi)
- L. marshi remains are known from the Upper Paleocene of CernayCernayCernay is the name or part of the name of several communes in France:*Cernay, Calvados, in the Calvados département*Cernay, Eure-et-Loir, in the Eure-et-Loir département*Cernay, Haut-Rhin, in the Haut-Rhin département...
, FranceFranceThe French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...
. - L. marshi has been cited as a descendant of Anconodon gidleyi.
Liotomus vanvaleni
- Alternate names: Parectypodus vanvaleni (Sloan RE, 1981), PtilodusPtilodusPtilodus is a genus of mammals from the extinct order of Multituberculata, and lived during the Paleocene in North America.Ptilodus was a relatively large multituberculate of in length, which is about the same size as a squirrel...
sinclairi) - L. vanvaleni remains are known from the San Juan Basin, New MexicoNew MexicoNew Mexico is a state located in the southwest and western regions of the United States. New Mexico is also usually considered one of the Mountain States. With a population density of 16 per square mile, New Mexico is the sixth-most sparsely inhabited U.S...
.