Английская Википедия:Futabasaurus

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Futabasaurus is a genus of plesiosaur from the Late Cretaceous of Fukushima, Japan. It was described and named in 2006, and was assigned to the family Elasmosauridae. The genus contains one species, F. suzukii.

Description

Файл:Futabasaurus suzukii.png
Life restoration

The size of Futabasaurus has been estimated within the range of Шаблон:Convert in length.[1] It can be distinguished from other elasmosaurids by the following characteristics: there is a long distance between the eye sockets and nostrils; the interclavicles and clavicles are fused, and the anterior edge is bent; the humerus is relatively long; and the femora are slim and show prominent muscle scars.[2]

Discovery and naming

Файл:National Museum of Nature and Science- Futabasaurus at Japan Gallery.jpg
Cast of fossils of Futabasaurus suzukii exhibited at the National Museum of Nature and Science

Futabasaurus is the first elasmosaurid found in Japan. It was originally known as either "Wellesisaurus sudzuki" or "Futaba-ryu" before publication. The type specimen of Futabasaurus was found in the Irimazawa Member of the Tamayama Formation, in the Futaba Group of Fukushima Prefecture, Japan. The rocks in which it were found date to the Inoceramus amakusensis zone of the early Santonian. The fossils were found by Tadashi Suzuki, then a high school student.[2] Many of the bones of the type specimen show signs of apparent scavenging or predation by sharks.[2]

The genus Futabasaurus was named after the Futaba Group, in which it was discovered; the species name is derived from the family name of its discoverer, Suzuki.[2]

The name "Futabasaurus" has also been used for an unrelated theropod dinosaur, from the Late Cretaceous Ashizawa Formation of Japan. However, this dinosaur was not officially named, and remains a nomen nudum.[3]

Classification

Файл:Скелет Wellesisaurus sudzuki.jpg
Pre-2006 skeletal mount which is informally labelled as "Wellesisaurus sudzuki" (with a large stone containing crinoids and ammonites in the background)

The following cladogram shows the placement of Futabasaurus within Elasmosauridae following an analysis by Rodrigo A. Otero, 2016:[4]

Файл:Fossil of Futabasaurus suzukii 02.jpg
Fossils

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See also

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References

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External links

Шаблон:Commons category Шаблон:Wikispecies

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