新疆和田杜瓦二叠—三叠纪动物化石研究

在原定为侏罗系的剖面中发现丰富的叶肢介、介形虫及鱼化石,本文对所发现的化石进行了描述.其中叶肢介化石有7属18种(有8个新种).其时代为早三叠世,与吉木萨尔县大龙口剖面的锅底坑组上部相当.介形虫化石有4属5种,其时代为晚二叠世晚期.鱼化石为1新属种,其时代意见偏新,所以,产这些化石的地层不是侏罗纪,而应是二叠一三叠纪的.

STADY OF SOME PERMIAN-TRIASSIC FAUNA FOSSILS IN DUWA, HOTAN, XINJIANG

We have found a lot of fauna fossils of Gonchostraca, Ostracoda and Fish from where was considered the Jurassic system in the past. The fossils were described in this paper. There are 7 genera and 18 species (8 being newly erected)of Conchostra-cans: Falsisca duwaensis, F. kanandaensis , F. turaica , F. semicircularis , Beijiang-limnadia duwaensis, B. elegans, B. qitaiensis, B. rotunda, Cyclotunguzites dalongkou- ensis, C. xinjiangensis, C. altus, C. multilinearis, Aquilonoglypta duwaensis , Ortho-themos minuta, Cornia of. samarica, Punctestheria multilineatus, P. elliptica, P. tri-angularis. This assemblage appears very much like the Early Triassic one from upper part of Guodikeng formation in Dalongkou, Jimusaer, Xinjiang. OstracodeS: Darwinula hotanensis, Darwinuloides hotanensis, Volganella xinjiang-ensis, V. hotanensis , Panxiania hotanensis. The age is regarded here as of Late Permian. Fish Duwaichthys mirabilis is newly erected, and it is considered by the author a little later in age. So this Jurassic system ought to be revised to Permian-Triassic one.