Futabasaurus is a genus of plesiosaur from the Late Cretaceous of Fukushima, Japan. Described and named in 2006, it was assigned to the family Elasmosauridae.

 The length was about 7 m, and the weight was about 3~4 tons. Long distance between the eye sockets and nostrils. Interclavicles and clavicles are fused and the anterior edge is bent. Relatively long upper arm. Slim thigh bones with a significant muscle scar.

 Futabasaurus suzukii was named from the family name of discover Suzuki, and futaba from the Futaba Group.

 The name "Futabasaurus" also appears in connection with a theropod dinosaur, also from the Late Cretaceous of Japan. However, this dinosaur was not officially named, so the dinosaur "Futabasaurus" is a nomen nudum when applied to this theropod. It is not the same as the plesiosaur named Futabasaurus.

 Futabasaurus is the first elasmosaurid found in Japan. The type species is F. suzukii. Many of the bones of the type specimen show apparent scavenging or predation by sharks.

 The first fossils of Futabasaurus were found in the Irimazawa Member of the Tamayama Formation, Futaba Group, Fukushima Prefecture, Japan, dating to the Inoceramus amakusensis zone of the early Santonian. The fossils were found by Tadashi Suzuki, a high school student around that time.

 Репродукция:

 Размеры тела в сравнении с человеком:

 Ископаемые останки (1, 2, 3):

Tags: Вымершие рептилии, Мел, диапсиды, завроптеригии, лепидозавроморфы, плезиозавроиды, плезиозавры, эласмозавриды

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