''Anosteira'' is an

extinct Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ...

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 carettochelyid

turtle Turtles are an order of reptiles known as Testudines, characterized by a special shell developed mainly from their ribs. Modern turtles are divided into two major groups, the Pleurodira (side necked turtles) and Cryptodira (hidden necked tu ...

from the

Eocene The Eocene ( ) Epoch is a geological epoch (geology), epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), Era. The name ''Eocene' ...

to the

Oligocene The Oligocene ( ) is a geologic epoch of the Paleogene Period and extends from about 33.9 million to 23 million years before the present ( to ). As with other older geologic periods, the rock beds that define the epoch are well identified but the ...

Asia Asia (, ) is one of the world's most notable geographical regions, which is either considered a continent in its own right or a subcontinent of Eurasia, which shares the continental landmass of Afro-Eurasia with Africa. Asia covers an area ...

and

North America North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car ...

Taxonomy

After * ''Anosteira manchuriana'' Zangerl, 1947 Liaoning, China, late

* ''Anosteira maomingensis'' Chow and Liu, 1955 Youkanwo Formation, Guangdong, China, Late Eocene * ''Anosteira mongoliensis'' Gilmore, 1931 Inner Mongolia, China, Late Eocene-

* ''Anosteira ornata'' Leidy, 1871

Bridger Formation The Bridger Formation is a geologic formation in southwestern Wyoming. It preserves fossils dating back to the Ypresian Epoch of the Paleogene Period. The formation was named by American geologist Ferdinand Vandeveer Hayden for Fort Bridger, whi ...

, Wyoming, USA, Early Eocene * ''Anosteira pulchra'' (Clark, 1932)

Uinta Formation The Uinta Formation is a Formation (geology), geologic formation in northeastern Utah. The name appears on a geologic map accompanying the Clarence King Fortieth Parallel report for 1876 but not defined until 1878 as the Uinta Group. As defined, ...

, Utah, USA, Middle Eocene (

Lutetian The Lutetian is, in the geologic timescale, a stage or age in the Eocene. It spans the time between . The Lutetian is preceded by the Ypresian and is followed by the Bartonian. Together with the Bartonian it is sometimes referred to as the Midd ...

)

References

Sources

* ''The Osteology of the Reptiles'' by Alfred Sherwood Romer * ''Chinese Fossil Vertebrates'' by Spencer G. Lucas * ''The Age of Dinosaurs in Russia and Mongolia'' by Michael J. Benton, Mikhail A. Shishkin, David M. Unwin, and Evgenii N. Kurochkin. p. 344.

External links

''Anosteira''
in the

Paleobiology Database The Paleobiology Database is an online resource for information on the distribution and classification of fossil animals, plants, and microorganisms. History The Paleobiology Database (PBDB) originated in the NCEAS-funded Phanerozoic Marine Pale ...

Carettochelyidae Eocene turtles Oligocene turtles Cenozoic reptiles of Asia Cenozoic reptiles of North America Prehistoric turtle genera Taxa named by Joseph Leidy {{paleo-turtle-stub