Miklukho-Maklay, A. D. (1960). ????? ???????????????????? ?????????? / ????? ???? ??????? ???????? ? ?????????????? ???? - New Early Carboniferous Endotyrids / New species of ancient plants and invertebrates of the USSR. ??????????????? - Gosgeoltekhizdat. 1: 140-151., available online at (http://paleostratmuseum.ru/files/Mikluho1960.pdf) page(s): p. 151, pl. 25, fig. 6
