China Daily reports integratedly, on June 7, " science " child print " scientific progress " a paper that published on June 6 at American time says, the United States " science " (Science) magazine child print " scientific progress " print sent Sino-US scientist to be in China discovery of 3 gorge area is apart from today 540 million old before the research achievement of animal footmark fossil. These footmark are like the animal of shrimp to stay by the one sort that lives before The Cambrian, also be the earliest animal footmark fossil on the world that heretofore discovers.
By geology of Nanjing of Chinese Academy of Sciences ancient biology institute and United States not the group of inchoate life research that Jiniyali is versed in the university is comprised, in Hubei Yichang 3 gorge area is apart from today in the layer of 551 million Precambrian lime cliff that comes 541 million years, discover fossil of footmark of ten ancient animals. Among them on a fossil, clarity of two animals footmark is visible. The apart between these two footmark 1 reach 2 centimeters, stay by the animal crawl of two side semmetry apparently, terrane surface still left this animal by marine the earth's surface crawl turns and bore enters the trace in deposit. Scientific research group passes a series of as comparative as what lay animal track now discovery, this kind of ancient animal, probable it is arthropod, annelidan or they are in the ancestor of fast ancient.
Chen Zhe of researcher of ancient biology institute expresses geology of Nanjing of the Chinese Academy of Sciences, have appendage (wart is sufficient) animal of two side semmetry, be like arthropod and annelidan, it is the animal class delegate that is born to abound diversity most with geological history period now. When are they appearing, it is biologist and the problem that paleontology home pays close attention to all the time. Although figure their ancestor may be in 635 million, the Aidikala 541 million years ago discipline has appeared, but in Aidikala the fossil evidence that cuts truly without discovery all the time in discipline layer. Accordingly, the two side semmetry that everybody thinks generally to have appendage is metazoan until about 541 million, 510 million years ago " The Cambrian life erupts greatly " when just appear suddenly.
"3 gorge area discovers, it is current foregone the oldest animal footmark fossil. " Chen Zhe says. Liability of scientific research group thinks, those who keep track is before The Cambrian one kind receives the animal that is bordering on shrimp. This one discovery also explains, before The Cambrian, have appendage and the complex animal of two side semmetry has appeared, the Cambrian erupts greatly be about to pull open prelusive.
By geology of Nanjing of the Chinese Academy of Sciences ancient biology institute and United States not the group of inchoate life research that Jiniyali is versed in the university is comprised, in Hubei Yichang Aidikala fastens 3 gorge area lamp shadow group (551 million, 541 million years ago) a series of footmark fossil that discover in layer, the origin of the animal of two side semmetry that has appendage to defeat solution, provided important clue. This discovery reached the record of footmark fossil ahead of schedule Aidikala discipline, this is current foregone the oldest footmark.
The footmark fossil that discovers this is comprised by two footprint, these footprint form reduplicative " alignment " or " bunch " . Although be shown a bit not the rule, but the feature that these footmark place expression come out, mirrorred the biology that make mark (can form vestigial biology) can break away from deposit surface through the appendage body that prop up. Vestigial and apparent be by two side symmetrical metazoan form, and these are metazoan have didymous appendage. In the meantime, these footmark fossil and go acupuncture point is linked together, the complexity that reflected action of the biology that make mark -- their from time to time gets next extraction mixing undertaking getting oxygen that feed into alga banquet layer, getting of from time to time gives alga banquet layer to crawl in deposit surface.
Although the biology making mark of this kinds of footmark was not saved,perhaps was not discovered, but the researcher is conjectural they are probable it is arthropod, annelidan or their ancestor.
On foregone earthly life history, great majority is contemporary and advanced the ancestor of the animal, till the The Cambrian 540 million years ago inchoate, just appear suddenly with fulminant form, be called " The Cambrian life erupts greatly " .
This project received fund of science of the Chinese Academy of Sciences, country appoint, the combination that geography of American science foundation and American country learns is aided financially.
On June 7, chen Zhe of researcher of institute of ancient biology of geology of Nanjing of the Chinese Academy of Sciences shows the world fossil of footmark of foregone the oldest animal. Wave of Yang of reporter of China News Service is photographed
That day, institute of ancient biology of geology of Nanjing of the Chinese Academy of Sciences releases a message to say, this inchoate life that with the United States Fujiniyali is versed in the university is comprised studies the group is in China 3 gorge what discipline layer discovered Aidikala to have appendage is metazoan the footmark that form, confirm go up for the earth foregone the oldest footmark fossil.
It is reported, the United States " science " (Science) magazine child print " scientific progress " (ScienceAdvances) online reported positive result of this one scientific research.
Chen Zhe of researcher of institute of ancient biology of geology of Nanjing of the Chinese Academy of Sciences shows the world fossil of footmark of foregone the oldest animal.
