A new species of Baiera from the Early Cretaceous Jehol Biota of southeastern Jilin,China

The Early Cretaceous Yingzuilazi Formation is exposed in the Baishan Basin, Baishan region of the southeastern Jilin Province, China. So far, no reports on fossil plants from this formation have been published. During recent field excursions, abundant faunal remains belonging to the Early Cretaceous Lycoptera–Ephemeropsis–Eosestheria assemblage of the Jehol Biota and numerous fossil plants were collected from the lacustrine beds of the lower part of this formation. A new species of Ginkgoales from this formation, Baiera baishanensis n. sp., is described based upon the leaf morphology and epidermal characters. This is the first report about fossil plants from the Yinzuilazi Formation, the easternmost distribution area of the Jehol Biota. The discovery of the new species extends significantly the stratigraphic and geographic distribution of Baiera in the Early Cretaceous Jehol Biota as well as the Eurasia. It also shows that Baiera was a common member of Ginkgophytes once lived in the Early Cretaceous deciduous forest of Northeast China. The new species also improves our knowledge on understanding the leaf morphology, epidermal features, and diversity of Baiera during the Early Cretaceous. Analysis of the epidermal characters of the new species and other associated plants reveals that the plants grew in a warm and humid climate in the temperate zone. The presence of some deciduous plants, including gingkgoaleans, czekanowskialeans, and some conifers, demonstrates a climate with seasonal fluctuations and precipitation.     

吉林省蓝藻门两新种

描述了采自长白山永青电站的蓝藻门新植物灰白伪枝藻（Scytonema cineraceum C.L.Zhou et Xiao, sp. nov.）, 其原植体丛生，垫状，近半球形，灰褐色。蓝藻门新植物岩生蓝柄藻(Cyanostylon rupestris L .H.Lü et Xiao, sp. nov.)，采自吉林省集安市五女峰，植物团块为较柔软的胶质小皮壳状堆积体，棕黄色或棕红色。