''Ulemica'' is an

extinct Extinction is the termination of an organism by the death of its Endling, last member. A taxon may become Functional extinction, functionally extinct before the death of its last member if it loses the capacity to Reproduction, reproduce and ...

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 venyukovioid therapsids, a type of

anomodont Anomodontia is an extinct group of non-mammalian therapsids from the Permian and Triassic periods. By far the most speciose group are the dicynodonts, a clade of beaked, tusked herbivores. Anomodonts were very diverse during the Middle Pe ...

related to dicynodonts. It lived during the

Middle Permian The Guadalupian is the second and middle series/epoch of the Permian. The Guadalupian was preceded by the Cisuralian and followed by the Lopingian. It is named after the Guadalupe Mountains of New Mexico and Texas, and dates between 272.95 ± 0. ...

period in what is now

Russia Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders ...

, and is known from the Isheevo assemblage of the Amanakskaya Formation. The

type species In International_Code_of_Zoological_Nomenclature, zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the spe ...

, ''U. invisa'', was originally placed in the genus '' Venyukovia'' by Russian

palaeontologist Paleontology, also spelled as palaeontology or palæontology, is the scientific study of the life of the past, mainly but not exclusively through the study of fossils. Paleontologists use fossils as a means to classify organisms, measure geolo ...

Ivan Efremov in 1940. It was later given its own genus ''Ulemica'' in 1996 by Mikhaïl Ivakhnenko, who also named a second species ''U. efremovi''. Efremov had originally intended to name the fossils of ''U. invisa'' as 'Myctosuchus invisus', however, he later recognised their similarity to ''Venyukovia'' and chose to assign the Isheevo material to this genus and leaving 'Myctosuchus' a ''

nomen nudum In Taxonomy (biology), taxonomy, a ''nomen nudum'' ('naked name'; plural ''nomina nuda'') is a designation which looks exactly like a scientific name of an organism, and may have originally been intended to be one, but it has not been published ...

''.

''Ulemica'' is known from multiple skulls and jaws from individuals of various ages, mostly of ''U. invisa'', while ''U. efremovi'' is known only by a single skull. An unusual feature of ''Ulemica'' is a pair of prominent bony bosses on each mandible, one at the bottom corner of the chin and another along the bottom edge of the jaw. These bosses are only seen in the largest and presumably oldest individuals.

References

External links

The main groups of non-mammalian synapsids at Mikko's Phylogeny Archive
Anomodont genera Guadalupian synapsids Guadalupian genus first appearances Guadalupian genus extinctions Fossils of Russia Fossil taxa described in 1996 {{anomodont-stub

See also

References

External links