The discovery of Early Permian ammonite fossils in Galvan, West Kunlun, Xinjiang and its significance of lithofacies and palaeogeography

It was the firt funded of the Prostacheoceras cf.Kongaraquense,Artinskia sp.,Agathiceras sp.ammonoid fossils in the Early Permian Strata in the Galvan Valley,Southwest Canyon area,Hotan,Xinjiang. The date of these three classes fossils is Cisuralian,which is equal to the date of Qixia Formation in the South China. The Prostacheoceras ammonoid is the main genus of Tethys type,while the Artinskia ammonoid is the special type of the Kungurian and the Agathiceras ammonoid is the global ammonite type in the Middle Carboniferous to Early Permian. Those three types ammonoid fossils which were funded in the Galvan area,enrich new fossil materials to the Jiawendaban Formation,and also provide important fossil evidences for the biostratigraphic correlation research of the West Kunlun.