''Khorotherium'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

of extinct mammaliaforms. The

type Type may refer to: Science and technology Computing * Typing, producing text via a keyboard, typewriter, etc. * Data type, collection of values used for computations. * File type * TYPE (DOS command), a command to display contents of a file. * ...

and only species, ''Khorotherium yakutensis'', is known from the Lower

Cretaceous The Cretaceous ( ) is a geological period that lasted from about 143.1 to 66 mya (unit), million years ago (Mya). It is the third and final period of the Mesozoic Era (geology), Era, as well as the longest. At around 77.1 million years, it is the ...

Batylykh Formation The Batylykh Formation is a geological formation in Sakha Republic, Yakutia, Russia. It is of an uncertain Early Cretaceous age, probably dating between the Berriasian and the Barremian. It is the oldest unit of the thick Sangar Series within th ...

in Western

Yakutia Sakha, officially the Republic of Sakha (Yakutia), is a republics of Russia, republic of Russia, and the largest federal subject of Russia by area. It is located in the Russian Far East, along the Arctic Ocean, with a population of one million ...

, Russia. It belongs to the family Tegotheriidae from the order

Docodonta Docodonta is an Order (biology), order of extinct Mesozoic Mammaliaformes, mammaliaforms (advanced cynodonts closely related to true Crown group, crown-group mammals). They were among the most common mammaliaforms of their time, persisting from t ...

, alongside '' Sibirotherium'' from the same region, it is amongst the youngest known docodonts.A. Averianov, T. Martin, A. Lopatin, P. Skutschas, R. Schellhorn, P. Kolosov, and D. Vitenko. 2018. A high-latitude fauna of mid-Mesozoic mammals from Yakutia, Russia. ''PLoS ONE'' 13(7):e0199983:1-17

Phylogeny

References

Docodonta Fossil taxa described in 2018 Early Cretaceous synapsids of Asia {{Paleo-cynodont-stub