Axitectum
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''Axitectum'' 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 bystrowianid
chroniosuchia Chroniosuchia is a group of tetrapods that lived from the Middle Permian to Late Triassic in what is now Kyrgyzstan, China and Germany, Eastern Europe. Chroniosuchians are often thought to be reptiliomorphs, but some recent phylogenetic analyses ...
ns from lower
Triassic The Triassic ( ; sometimes symbolized 🝈) is a geologic period and system which spans 50.5 million years from the end of the Permian Period 251.902 million years ago ( Mya), to the beginning of the Jurassic Period 201.4 Mya. The Triassic is t ...
deposits of
Nizhni Novgorod Nizhny Novgorod ( ; rus, links=no, Нижний Новгород, a=Ru-Nizhny Novgorod.ogg, p=ˈnʲiʐnʲɪj ˈnovɡərət, t=Lower Newtown; colloquially shortened to Nizhny) is a city and the administrative centre of Nizhny Novgorod Oblast an ...
and Kirov Regions,
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 ...
. It was a rather large animal judging by the size of its vertebrae. The back was covered in bands of highly ornamented
osteoderm Osteoderms are bony deposits forming scales, plates, or other structures based in the dermis. Osteoderms are found in many groups of extant and extinct reptiles and amphibians, including lizards, crocodilians, frogs, temnospondyls (extinct amph ...
plates, similar to those found in modern crocodiles. The bands overlapped with the next band at the posterior end. Michael J. Benton, Mikhail A. Shishkin and David M. Unwin (2003): The Age of Dinosaurs in Russia and Mongolia. Cambridge University Press, Cambridge UK.
Relevant page
from
google books Google Books (previously known as Google Book Search, Google Print, and by its code-name Project Ocean) is a service from Google that searches the full text of books and magazines that Google has scanned, converted to text using optical charac ...
It was first named by M.A. Shishkin and I.V. Novikov in
1992 1992 was designated as International Space Year by the United Nations. Events January * January 1 – Boutros Boutros-Ghali of Egypt replaces Javier Pérez de Cuéllar of Peru as United Nations Secretary-General. * January 6 ** The Republ ...
and 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 ...
is ''Axitectum vjushkovi''. ''A. vjushkovi'' is known from the
holotype A holotype (Latin: ''holotypus'') is a single physical example (or illustration) of an organism used when the species (or lower-ranked taxon) was formally described. It is either the single such physical example (or illustration) or one of s ...
PIN 1025/334, which consists of armor scute. It was found in the Vokhminskaya Formation of the Vokhmin Horizon and named in honour of Vyushkov, who was a Russian paleontologist. A second species, ''A. georgi'', was named by I.V. Novikov and M.A. Shishkin in
2000 2000 was designated as the International Year for the Culture of Peace and the World Mathematics, Mathematical Year. Popular culture holds the year 2000 as the first year of the 21st century and the 3rd millennium, because of a tende ...
on the basis of another armor scute (holotype PIN 953/392). It was found in the Fedorovskaya Formation of the Yarenskian Superhorizon and named in honour of the geologist Georgii Ivanovich Blom. A third species, ''A. blomi'' (which also named in honour of G.I. Blom, in
1992 1992 was designated as International Space Year by the United Nations. Events January * January 1 – Boutros Boutros-Ghali of Egypt replaces Javier Pérez de Cuéllar of Peru as United Nations Secretary-General. * January 6 ** The Republ ...
), is now considered
junior synonym In taxonomy, the scientific classification of living organisms, a synonym is an alternative scientific name for the accepted scientific name of a taxon. The botanical and zoological codes of nomenclature treat the concept of synonymy differently. ...
of the type species. Other materials also referred to ''Axitectum''.


References

Chroniosuchia Early Triassic tetrapods Triassic tetrapods of Europe Fossils of Russia {{paleo-tetrapod-stub