Scientists have been trying for years to determine how turtles developed their protective shells. There has been newly found evidence that turtles lived at one point without any shell over their back. A new fossil discovered from슬롯 머신 사이트 추천Guizhou province of south-west China dates back to 228 million years. This ancient fossil looks very much like a turtle슬롯 머신 사이트 추천and has a beak in the front end. This fossil has been named슬롯 머신 사이트 추천Eorhynchochelys sinensis, which means "Dawn turtle with a beak from China".

There are two theories about the emerging of the turtle shell. One states it formed from슬롯 머신 사이트 추천bony and scale-like growths that developed on the skin of reptiles. The other theory points that shells came when the ribs of some reptiles grew broader than the others. According to scientist Tyler Lyson of Yale University, "The turtle shell is a complex structure whose initial transformations started over 260 million years ago in the Permian period.슬롯 머신 사이트 추천Like other complex structures, the shell evolved over millions of years and was gradually modified into its present-day shape."슬롯 머신 사이트 추천Olive Ridley Sea Turtles Nests in Mumbai: Know More About the Species and Other Turtle Nesting Spots in India.

The skeleton found in China has some teeth and suggests the missing link in turtle evolution.슬롯 머신 사이트 추천The fossil is 2.5 metres long, with a lengthy tail and broad and flat ribs along its back. It appears to have formed슬롯 머신 사이트 추천the disc-like structure which later evolved into a shell. Chun Li, a Chinese researcher, co-author of study has written, "the specimen is an important missing link in the early evolution of the turtle." He has been studying turtle fossils in China for years now. So the latest finding also points at evolution from similar reptile ancestors.

(The above story first appeared on LatestLY on Aug 23, 2018 11:52 AM IST. For more news and updates on politics, world, sports, entertainment and lifestyle, log on to our website latestly.com).