【摘要】 本文描述了我国辽宁省北票市上侏罗统义县组中的里阿斯箭蜒科（Ｌｉａｓｓｏｇｏｍｐｈｉｄａｅ）一新属（Ｃｈｒｙｊｏｇｏｍｐｈｕｓｇｅｎ．ｎｏｖ．）。这是里阿斯箭蜒科昆虫化石在我国的首次发现，对研究这个类群的起源、演化和地理分布都具有重要意义．更多还原

【Abstract】 he author first deals with the Chrysogomphus gen. nov. of Liassogomphidae of Odonata from Late Jurassic of Beipiao city, Liaoning Province, China.Diagnosis of Chrysogolnphus gen. nov.:Body large in size. Upperside of triangle ending below the distal angle of hypertrianlge. Hypertriangle free. There are 3 incomplete crossveins between 2 thickened complete primary antenodals. Forewing with 1 anal crossvein. 2 Ac in hihdwing. The area behind lA reaches a little beyond the level of the nodus in the hindwing. R.+, and MA of hindwing not undulate but parallel, 2 cell-rows beginning at middle from N to Pt and increasing to 4 cell--rows under Pt. IRZ and Rspl poorly developed. Between R, and IR3 2 cell-rows beginning under Pt. IR3 with 3 pectinate branches. MA and CuP diverging slightly, 4 cell-rows between them from the triangle to level of origin of R4+5 then cell-rows increasing to wing-margin. MA with 3 straight veins.Comparision: The Liassogomphidae consists of 5 genera, including Necygomphus,Proinogomphus, Liassogomphus I Palaeogomphus and Phth’’togomphus. The new genera does not completely correspond to any of them. Judged by the main characteristics of I crossvein in triangle and poorly developed IR,, the new genera apparently differs from the Necygare phus. The Chrysogomphus also can be distinguished from the other 4 generas in presenting a combination of features,such as 4 cell--rows between MA and CuP,poorly--developed IR,,IR, with 3 straight veins, etc. Besides, new genera is similar to Protolindenia too, but the former may easily be distinguishable from the latter by the position of oblique vein and IR,with 3 pectinate branches.更多还原