新疆托克逊晚三叠世昆虫  

LATE TRIASSIC INSECT FAUNA FROM TOKSUN, XINJIANG

作　　者：林启彬[1] 

机构地区：[1]中国科学院南京地质古生物研究所,南京210008

出　　处：《古生物学报》1992年第3期313-335,389-392,共23页Acta Palaeontologica Sinica

摘　　要：记述了新疆托克逊晚三叠世昆虫化石14属17种。这一昆虫群代表了我国北方三叠纪昆虫的面貌,也是我国最丰富的三叠纪昆虫群之一。从其生态习性分析,这个昆虫群以生活于水中和岸边环境的种类为主,说明当时托克逊地区为一水域环境,气候也很适宜昆虫的生存。Here described and illustrated is the new fossil insect fauna, called the Toksun insect fauna from the Upper Triassic Huangshanjie Formation of Kerjie, Toksun county, Xinjiang. The specimens include 17 species, 10 of which known as new genera are classified in Blattoidea, Plecoptera, Homoptera, Heteroptera, Mecoptera and Coleoptera respectively. A feature of the fauna is characterized by numbers of beetles. Cockroaches with 3 species belong to Mesoblattinidae; many water boatmen are diverse, represented by 4 species referred to 4 genera, also with the presence of stone flies, cercopoid and scorpion flies. Most insects from the fauna are moderate-sized but with a few large forms; 9 species of them are aquatic, occupying 60% of the total fauna. In the study of the Triassic fossil insects over the world, those having been known include the Apheloscyta Assemblage of South China, the Ipswich insect fauna from the Upper Triassic of Australia, the Omineo insect fauna of Japan and the Issyk-Kul insect fauna of Russia. The author suggests that as compared with the above faunas, the Toksun insect fauma is similar to the Apheloscyta Assemblage, although there are some notable events. For instance, cockroaches are rarely recorded from the Upper Triassic of South China but they are rich in the Toksun fauna and the Heteroptera are diverse; the formations containing the Upper Trassic Apheloscyla Assemblage in South China are intercalated with marine sediments but the formations containing the Toksun fauna with continental sediments. DESCRIPTION OF NEW GENERA AND SPEC1ES Blattoidea Triassoblatta hyptis sp. nov. (Pl. Ⅰ, fig. 1; Text-fig. 2) So far 30 species have been known in this genus. As compared with these species, the new species is closely allied to T. tudupinensis Lin, but differs from the latter in the larger tegmen; vein R with abundant (26) branches, vein M with 5 branches, the first one being close to R; and bifurcate CuA branches. Plecoptera Capitiperla gen. nov.

关 键 词：昆虫动物群 古环境 晚三叠世 新疆 

分 类 号：Q915.819.7[天文地球—古生物学与地层学]