【摘要】 本文报道了辽宁西部北皋长皋蛇不歹附近的植物化石5属14种,其中对5个新种(北票锥叶蕨、常氏锥叶蕨、假微尖堆叶蕨、简单异羽叶、稀脉篦羽叶)进行了描述,据产出的植物化石特征及同相关地层中的植物化石对比,认为该区植物化石所产出地层时代为中侏罗世。更多还原

【Abstract】 The collection studied in the present paper was obtained in by authors from the Langi Formation of Beipiao County, Liaoning Province. In this region the Langi Formation is mainly composed of lava and effasive rocks, intercalated with sedimendary rocks and disconformably underlain, by the Haifanggou Formation and conformably overlain by the Tuchengzi Formation. Its age is considered as Middle Jurassic. The fossil plants were derived from the intercalating sedimentary rocks in the lower part of the Langi Formation e.g.so called neutral and acidic eruptive rocks member. The spesibed here include five genera 14 species, of which 5 species are new species. They are Coniopteris beipiaoensis sp. noy. , c. cf. burejensis (Zal) . Seward, C, changi sp, nov. , Hausmannia shebudaiensis Zhang et Zheng, Ciadophiebis cf. asiatica Chow et Yeh, C. pseudoargutuia sp nov., C.sp.ic.sp. 2 ,Anomozdmites simplex sp,nov., A. sinensis zhang et zheng, ctenis ananastomosans zheng et zheng, C. pontica Delle, C, rarinervis sp. nov.Nilssonia sp. etc.更多还原