Abstract: This paper deals with the epidermal structure of Rhaphidopteris latiloba sp. nov. and R. liuzhiensis sp. nov. The specimens were collected from the upper Triassic caol series of Liuzhi district, Guizhou province. In R. latiloba, the ultimate pinna are wedge-shaped, segments are wider (about 0.2–0.25cm). The leaf is amphistomatic. Stomatal apparatus are haplocheilic, with sunken guard cells and irregullarly orientated stomata, 28–30 per sq. mm in the lower epidermis. In R. liuzhiensis, leaf is tripinnate, oval. Ultimate pinna lanceolate. Segments are narrow about lmm in width. Stomatal apparatus are haplocheilic and round-oval in shape with irregularly orientated stomata 35–40 per sq. mm in the lower epidermis.

Key words: Rhaphidopteris latiloba sp. nov., R. liuzhiensis sp. nov., Upper Triassic