Chinese scientists have found 400 million years ago, the oldest skeleton tetrapod fossils (FIG.)

sarcopterygii brain evolution. The Chinese academy of sciences institute of vertebrate paleontology and paleoanthropology/provide institute of vertebrate paleontology and paleoanthropology of the Chinese academy of sciences/taken

singular east raw fish ecology reconstruction (Brian Choo drawing) and brain three-dimensional virtual reconstruction. Chinese academy of sciences institute of vertebrate paleontology and paleoanthropology/provide Brian Choo/drawing taken

Beijing, Beijing October 23 (reporter Sun Zifa) 23 reporters from the institute of vertebrate paleontology and paleoanthropology, Chinese academy of sciences, which early vertebrate group led by zhu researcher in zhaotong of yunnan in the early devonian strata discovered to date the oldest skeleton tetrapod fossils, about 409 million years ago, a finding that could quadrupeds branches, the evolution of history pushed before 10 million.

to mark the early devonian vertebrate researchers, the late famous geologist dong-sheng liu, the discovery of the oldest backbone quadrupeds generic name so far was named singular east raw fish. We have learned, as so far the oldest and most primitive backbone quadrupeds, bizarre east of raw fish for traceability four-legged animals, including humans, ancestors evolution will have important influence.

early vertebrate group of Chinese academy of sciences such as Dr Lu Jing using high resolution X ray tomography and computer three-dimensional virtual reconstruction technology to recover the cranial cavity of the east raw fish and related nerves, blood vessels, such as structure, reveals the basic form of backbone four-legged animal brain, for the research of tetrapod evolution of brain to provide the first reference point. To the east of raw fish brain structure research also shows that some important characteristics of the brain associated with terrestrial vertebrates life in the most early tetrapod evolution has emerged.

quadrupeds branches, including the traditional definition of quadruped (terrestrial vertebrates) and with their relationship in recent fossils of fish, which is also referred to as the backbone of quadrupeds. 370 million years ago in the late devonian, the backbone of quadrupeds a onto land, derived the first terrestrial vertebrates, and eventually evolved into humans. As to explore the key landing of fishes, backbone of tetrapod evolution has been a hot topic in the study of paleontology and evolutionary biology.

in recent years, a paleontologist at all over the world have found that some early amphibians have characteristics of the fish skeleton four-legged animals, such as late devonian tariq (ph) by the fish and the fish, etc. The discovery of these transitional fossils filled from fish to the evolution of the amphibians ring, for studying tetrapod by water to the land in the process of the evolution of the key characteristics (such as the origin of the limbs, the formation of the middle ear, etc.) provided valuable evidence. However, for a long time due to the limitation of fossil material, academic circles for more early backbone of four-legged animal studies is not sufficient, many problems (such as cranial cavity structure, important characteristics of evolution sequence, etc.) are still not clear.

on October 23rd, the latest publication of the journal nature communications Chinese scientists found that eastern raw fish and research results, according to the findings as evidence provides the key to solve the problem: the first is to fill the backbone of early tetrapod fossil record blank, pushing four-legged animal clade evolution history before 10 million, greatly shorten the four-legged animals and lungfish s gap between the two branches, the fossil record; Second is to study the early evolution of the quadruped provides rare data. The