Protozoa. Dizhi Kuangchan Bu Yichang Dizhi Kuangchan Yanjiusuo, [Ed]. Changjiang sanxia diqu shengwu dicengxue. Biostratigraphy of the Yangtze Gorge area. (3) Late Palaeozoic era., Geological Publishing House, Beijing, 1984: 1-411, 1-52. Chapter pagination: 110-177. 118 [Zoological Record Volume 125]