The new species of A-dragon fossils has been officially named China's Yuyun Jialong.

The Scientific Reports, published on February 27th, reported on the discovery of a new species of aphorey fossils found in the town of Yuyun County, Zhejiang Province, officially named Jinyunpelta sinensis.
the research was carried out by researchers such as Zheng Wenjie and Jin Yusheng of Zhejiang Museum of Natural Sciences, Xu Xing of the Institute of Paleovertebrates and Paleoanthropology of the Chinese Academy of Sciences, Wang Qiongxuan of the Yuyun County Museum, and Dongyang First, Ofi Ji, Fukui Prefecture Dinosaur Museum, Japan.
lived about 100 million years ago, more than 10 million years before the previously discovered fossils of the apogee with tail hammers.
the fossils of The Chinese Yuyun Aron were excavated in 2013 by the Zhejiang Museum of Nature, the Yuyun County Museum and the Fukui Prefecture Dinosaur Museum in Japan.
the fossils of the study included two individuals, one of whom preserved complete skull fossils, tail hammer fragments, spines and limb bones, and the other who preserved part of the lower limb and the complete tail hammer.
adragon-like dinosaur is best known for its tail hammer.
but in fact only a small number of Adragons have tail hammers, and tail hammers only appear in the late stages of the evolution of the A-dragons.
adragon may have originated in the middle jurassic, but the early fossils of the A-dragon species are relatively broken, and the earliest confirmed fossils of the A-dragon were found in the late Jurassic (more than 150 million years ago).
the fossils of the arigale, which had previously had a tail hammer, were found only in the late Cretaceous Period of Campan and Maastricht (about 836 to 66 million years ago), and the oldest fossils of the capled-tailed capone were found in the Pinacosas gururangerii in northern China and Mongolia, about 80 to 75 million years ago.
Ankylosauria is divided into two categories: Ankylosauridae and Nodosauridae.
noarify edion skulls have a longer tail and no tail hammer.
in the A-Dragon, the skull is slightly wider than the original Acroon, but it still grows wider and has no tail hammer.
until the more progressive Ankylosaurinae, the skull widens and the tail has a tail hammer.
sequence analysis results show that the yanyun Jialong is currently the most primitive member of the A-Long Yaco.
previously, the researchers through the study of the a-dragon tail hammer and tail vertebrae, the a-class tail hammer appeared from small gradually larger, and the large stinger at the widest point of about 45 cm, such a large tail hammer appeared in the early evolution of the A-dragon class, indicating that the evolution of tail hammer is not strictly according to the evolution from small to large, far more complex than previously thought.
Zhejiang previously studied and named two kinds of A-dragon fossils: Lishui Zhejiang Dragon and Yang Yan Dongyang Dunlong.
Lishui Zhejiang Dragon's classification is controversial, previously classified as the nodule dragon section, but in the latest analysis was classified in the A-Long section, due to the lack of some unique characteristics, some researchers consider edifice.
Lishui Zhejiang Dragon has preserved a complete tail vertebrae, which can confirm that the tail end has no tail hammer development, unlike the Yanyun Jialong.
Dongyang Shield dragon did not save the tail vertebrae, but saved the healing of the recommendation shield plate, belongs to the nodule dragon class.
Yuyun Jialong has been found at least 5 individuals, is currently found in southern China the most complete preserved fossils of the A-dragon species, the fossils found basically cover all parts of the whole body, Zhejiang Museum of Natural Nature professionals based on the fossils found on the Yuyun A-dragon restoration, restoration of the total length of about 5 meters, about 1.3 meters high.
's discovery of the Yanyun Aron is clear that the Cretaceous Zhejiang lived a variety of avariety dinosaurs, including the nodule son and the aloof.
the study was funded by the National Natural Science Foundation of China, the National Key Laboratory of Paleontology and Stratibiology and the Jurassic Foundation.
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