Japan recognized the world's oldest real dolphins fossil has a history of 8500000 years

Japanese researchers

re analysis of the unearthed in Hokkaido a former dolphin fossil skull after the confirmation, it is really a dolphin ancient fossil has Cheap T-Shirts a history of 8500000 years, and so far the oldest found dolphins fossil.

the dolphin is widely living in the continental shelf in the shallow waters near the aquatic mammals. Dolphins also known as the short Cheap NBA Jerseys beaked common dolphins, common dolphins, a dolphin Delphinus, found in tropical to temperate waters.

the fossils were unearthed in 1961, 1977, researchers have thought it belongs to the dolphin, stenella. In the new study, researchers at the Waseda University and Cheap CFL Jerseys Akita University to carry out field investigation found, fossils, strata age is 8500000 to 13000000 years ago.

The

researchers reanalyzed the fossil samples from the view of anatomy, and a detailed study of the skeletal morphology. The results found, it does not belong to the existing classification dolphins in science, but one of the oldest real dolphins, dating back about 8500000 years. Prior to this, Italy had unearthed a 5300000 year history of the common dolphin fossil.

The

team think common ancestor, the dolphin family is around 9000000 years ago to 11000000 years ago, the results of this Cheap Hats study will contribute to the genesis of Cheap Football NCAA Jerseys dolphins and killer whales "relatives", and clarify the dolphin to the global ocean path diffusion. (reporter Lan Jianzhong)