早白垩世真蕨植物化石的四个新种

本文据产于内蒙古霍林河盆地早白垩世地层的生殖羽片材料建立了膜蕨科的Hymenophyllites linearifolius sp.nov.和铁线蕨科的Adiantopteris eleganta sp.nov.,并从植物形态、生殖器官和生态特征等方面与现生类别进行了对比。本文还描述了同一产地和层位的Cladophlebis latibasis sp.nov,及产自辽宁铁法盆地早白垩世的Sphenopteris liaoningensis sp.nov.。

FOUR NEW SPECIES OF EARLY CRETACEOUS FERNS

New fossil ferns Hymenophyllies linearifolius sp. nov.. Adiantopteris eleganta sp. nov.. Cladophlebis latibasis sp. nov. from the lower part of the Huolinhe Formation (earliest of the Early Cretaceous) of the Huolinhe Basin. Inner Mongolia and Sphenoperis liaoningensis sp. nov. from the Xiaoming'anbei Formation (Enrly Cretaceous) of the Tiefa Basin. Liaoning Province have been described in this paper. Among the four new species. Hymenophyllites li- nearifolius is referred to Hymenophyllaceae and Adiantopteris eleganta to Adiantaceae based on their fertile pinnae and sori. and the fomer is a small humidiherb while the latter a forest land fern accoding to the present paper.