Chuvashov, B. I. (1965). ???????????? ? ????????? ?? ??????????????? ????????? ????????? ?????? ???????? ? ?????? ????? - Foraminifera and algae from the Upper Devonian sediments of the western slope of the Middle and Southern Urals. In: ???????????? ?????? ? ????? ????? (??????? ?? ???????? ???????????? .N° 8)- Devonian and Permian Urals Foraminifera (Collection on stratigraphy No. 8). ???? ????? ????????? ???????? - Ural Filiale of the Russian Academy of Sciences Proceedings of the Institute of Geology. 74: 3-154., available online at (https://books.google.pt/books?id=y8BuL_LUMsYC) page(s): p. 33 pl. 4 figs. 11 holotype-14
