WANG FaGuo, YE YuShi, LIU DongMing, XING FuWu. 植物研究, 2008, 28(1): 3-4, 6

ABSTRACT: Cyrtogonellum is a endemic fern genus that restricted to the limestone areas of SW China and  N Vietnam . Four species are recognised from  Guangdong   Province  and three of them are new records to this province, i. e. : Cyrtogonellum emeiensis Ching ex Y. T. Hsih, C. falcilobum Ching ex Y. T. Hsieh and C. fraxinellum （Christ） Ching. It is suggested that these species should be listed as national protected plants in  China .