China News Agency, Beijing, May 29 (Reporter Sun Zifa) The reporter learned from the Institute of Paleontology and Paleontology of the Chinese Academy of Sciences on the 29th that the researcher Liu Jun and the latest cooperation between Professor Fernando Abdala of Jinshan University in South Africa In the study, an incomplete fossil with a mandible skull was found in Inner Mongolia, China, representing a new branch of the beast head, named "Caodeyao liuyufengi".

  Liu Jun said that the main origins of fossil head animals are South Africa and Russia, and the members of each internal branch are mainly from South Africa. Previously, it was believed that the internal branches of this group were basically of Gondwana origin. The Naobaogou Formation in the Daqingshan area of ​​Inner Mongolia produces a large number of tetrapod fossils. Here, the newly discovered beast-headed branch "Liu's Cao Deyao" is named after Cao Deyao, a small village near the fossil origin. The species name is given to Liu Yufeng, a mechanic who participated in the field excavation of Daqing Mountain.

  Liu's Cao Deyao animal has the characteristics of short height of the kiss, width of the temporal hole, and the coronal process of the mandible away from the zygomatic arch. The latter feature is only found in the largest Puri in Russia among the heads of the Permian (about 250 million years ago). The beast (Purlovia maxima), the order analysis shows that the Liu's Cao Deyao and the Purli beast represent a branch that is only found on the mainland of Laura. At the same time, there have been found two kinds of fossils of the head of the animal, namely the weak stone jaws of the family of Wang's stone crooked jaws and Jia's nine peak beasts, and their related genera found in Russia constitute the earliest branches of the weak jaws , To support the weak jaws of beasts originated in the continent of Laura. This also means that the animal heads of the late Permian in China have a high diversity.

  This latest progress paper on the study of animal heads in the field of paleontology was published online in the international academic journal "PeerJ" on May 28. This is also the fifth in a series of studies on the fauna of the Baobaogou group in the late Permian period by Liu Jun and others article. Earlier, the research team of Liu Jun found through in-depth studies that the bidentate mammals in the quadruped group of the Naobaogou Formation in the Daqingshan area of ​​Inner Mongolia dominated and were closely related to the bidentate mammals in the late Permian of Xinjiang. (Finish)