''Khorotherium'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

of extinct mammaliaforms. The type and only species, ''Khorotherium yakutensis'', is known from the Lower

Cretaceous The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of th ...

Batylykh Formation The Batylykh Formation is a geological formation in 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 the Vilyuy syne ...

in Western

Yakutia Sakha, officially the Republic of Sakha (Yakutia),, is the largest republic of Russia, located in the Russian Far East, along the Arctic Ocean, with a population of roughly 1 million. Sakha comprises half of the area of its governing Far Eas ...

, Russia. It belongs to the family

Tegotheriidae Docodonta is an order of extinct mammaliaforms that lived during the Mesozoic, from the Middle Jurassic to Early Cretaceous. They are distinguished from other early mammaliaforms by their relatively complex molar teeth, from which the order ...

from the order

Docodonta Docodonta is an Order (biology), order of extinct Mammaliaformes, mammaliaforms that lived during the Mesozoic, from the Middle Jurassic to Early Cretaceous. They are distinguished from other early Mammaliaformes, mammaliaforms by their relativel ...

, alongside ''

Sibirotherium ''Sibirotherium'' is an extinct genus of docodont mammaliaform. It is known from only a single named species, ''Sibirotherium rossicum'', known from jaw fragments and teeth found in the Early Cretaceous (Aptian) aged Ilek Formation The Ilek F ...

'' 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

Docodonts Prehistoric therapsid genera Fossil taxa described in 2018 {{Paleo-therapsid-stub