According to a new study, common ancestors of humans had tentacles about 600 million years ago. The well-known Vitruvian Man, which was drawn by Leonardo da Vinci, portrayed the canon of human’s proportions.

A new theory by Elena Temereva, professor of the Department of Zoology at the Faculty of Biology at Lomonsov Moscow State University, has found where humans received bilateral symmetry. The new study has now linked humans to creatures with tentacles.

As per a number of researchers, Bilateria ancestor came into life form at the end of the Vendian period. They lasted from about 635 to 541 million years ago. The Vendian seas had all kinds of simple and complex organisms. Most of the organisms that displayed the radial symmetry are still present in sea creatures of today.

According to the new study, humans received the evolutionary distinction from the simpler organisms of the Vendian seas. The study stated that a worm which did not have appendages was the last common ancestor of Bilateria.

There is another study which stated that human’s common bilaterian ancestor came from a complex coelomic organism. The study was proposed by British Zoologist Adam Sedgwick. It was accepted by Russian zoologists. The researchers believed the complex coelomic organism possessed appendages for mobility. The study also revealed that the coelom of coelomic organism had gone a number of changes owing to a variety of evolutionary factors.

Elena Temereva explored the study further. The researcher conducted a research while studying Lingula anatine. Lingula anatine is among the brachiopods still present on the planet today. Lingula anatine dates back to 500 million years ago. The fossils of Lingula can be found all across the globe, in locations such as North America, Europe and Southeast Asia.