Chinese and foreign scientists have revealed the secrets of swimming in earlier sea-born four-legged animals

Beijing, September 17 (Reporter Zhang Lei) a few days ago, a team of Chinese and foreign scientists announced that more than 200 sea reptile footprints have been found in the town of Yipu, Anshun Economic and Technological Development Zone in Guizhou Province, some of which provide the earliest evidence of simultaneous swimming of the haisheng tetracycles to date. The results were published in the latest issue of the journal Paleontology, Paleoageology, Paleoclimatology, Paleontology.
summer of 2017, paleontologists from China, Germany, the United States, Canada, the United Kingdom and Australia visited the site at the invitation of the Guizhou Provincial Museum. The results showed that the fossil combination of footprints was preserved at the mud dolomite level of the pine section of the Zhongsan-Anni-Guanling Group in Honglong Village, The town of Yupo.
" remnants scientists in Guanling group pine section of Yunnan Province found a large number of land-born main dragon footprints, the study found 22 trails, more than 200 isolated footprints and some uncertain traces are significantly different from the aforementioned footprints, for marine reptiles left in the bottom of the water. Of these, 12 trails and some isolated footprints were classified as Luoping double oars. One of the authors of the paper, Yan Lida, an associate professor at china University of Geology (Beijing), said. Luo Ping double oar trail was first discovered and named by the Chengdu Geodyntic Center of the China Geological Survey in Luoping County, Yunnan Province, and belongs to the foraging trail of the Meso-Generation sea life reptiles. According to the research team, the double oar tracks found at the footprints of the pythons are also half-moon-new-shaped, basically in pairs, and relative to the symmetrical distribution of the travel route, the trail has a circle of sediment piles moving back, "the overall shape is the same as the double oars produced in Yunnan, but earlier in time."
found a new type of footprint on rocks on the same floor as the double oar trail. Unlike double oars, the new footprint type is a four-toed footprint that walks with a half-foot-full-foot touch, with complete toes and palm marks, similar to the footprints left by a four-legged animal walking normally on land. "The footprints are long and have clear toe marks, which show that the toes are stout. The overall width of the trail, the symmetrical footprint and relative to the middle line of the trail, is typical of the underwater swimming or underwater walking habits of the four-legged animals left behind. "Lida described.
because the patterns and patterns are significantly different from previously recorded footprints, the team named them the "Running Anshun Footprints". After comparing foot bone fossils produced by footprint-related formations, the team believes that the creators of an Anshun footprint may be dragon turtles or -toothed dragons that have not yet been found in the Guanling group.
marine reptiles of the Meso-Chinese generation are the hot research direction of paleontology, and there has been a great deal of controversy in the academic circles for a long time about the morphological function analysis of related categories, especially the restoration of motor mode. "This work has focused on the discovery of a large number of fossils of tri-tri-era marine reptile footprints, which is important for revealing the way of life of such animals and the characteristics of the Tri- Li Wei, an expert on marine reptiles in the Trident and a researcher at
Institute of Paleontology and Paleoanthropology in China, commented.