''Bystrowiana'' is an
extinct genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom ...
of
bystrowianid chroniosuchia
Chroniosuchia is a group of tetrapods that lived from the Middle Permian to Late Triassic in what is now Eastern Europe, Kyrgyzstan, China and Germany. Chroniosuchians are often thought to be reptiliomorphs, but some recent phylogenetic ana ...
n from upper
Permian
The Permian ( ) is a geologic period and System (stratigraphy), stratigraphic system which spans 47 million years from the end of the Carboniferous Period million years ago (Mya), to the beginning of the Triassic Period 251.9 Mya. It is the last ...
deposits of
Vladimir Region,
Russia
Russia (, , ), or the Russian Federation, is a transcontinental country spanning Eastern Europe and Northern Asia. It is the largest country in the world, with its internationally recognised territory covering , and encompassing one-eig ...
and
Jiyuan
Jiyuan () is a sub-prefecture-level city in northwestern Henan province, People's Republic of China. It borders the prefecture-level cities of Jiaozuo and Luoyang to the east and southwest respectively, as well as the province of Shanxi to the n ...
,
China.
Chroniosuchia
Chroniosuchia is a group of tetrapods that lived from the Middle Permian to Late Triassic in what is now Eastern Europe, Kyrgyzstan, China and Germany. Chroniosuchians are often thought to be reptiliomorphs, but some recent phylogenetic ana ...
ns are often thought to be
reptiliomorph
Reptiliomorpha (meaning reptile-shaped; in PhyloCode known as ''Pan-Amniota'') is a clade containing the amniotes and those tetrapods that share a more recent common ancestor with amniotes than with living amphibians (lissamphibians). It was defi ...
s,
but some recent phylogenetic analyses suggest instead that they are stem-tetrapods. The genus is named in honour of Dr.
Alexey Bystrow
Alexey Petrovich Bystrow, sometimes spelled Alexey Petrovich Bystrov and Aleksei Petrovich Bystrow, (russian: Алексе́й Петро́вич Быстро́в; February 1, 1899 – August 29, 1959) was a Soviet paleontologist, anatomist, ...
, who was a Russian paleontologist. It was first named by Vyushkov in
1957
1957 ( MCMLVII) was a common year starting on Tuesday of the Gregorian calendar, the 1957th year of the Common Era (CE) and ''Anno Domini'' (AD) designations, the 957th year of the 2nd millennium, the 57th year of the 20th century, and the 8th year ...
and the type species is ''Bystrowiana permira''.
Two species—''B. permira'' and ''B. sinica''—are known.
''Bystrowiana'' is known from a 30 cm skull, which suggests it was a large animal, up to 2.5 m (8.2 ft) in total body length.
[http://tech.groups.yahoo.com/group/seymouria/message/251 ]
References
Chroniosuchians
Permian tetrapods
Permian animals of Asia
{{paleo-amphibian-stub