original description
Loeblich, A.R.; Tappan, H. (1953). Studies of Arctic foraminifera. <em>Smithsonian miscellaneous collections.</em> 121 (7):1–150., available online at https://biodiversitylibrary.org/page/27011009
page(s): p. 41, pl. 5, fig. 10. [details] Available for editors 
context source (Deepsea)
Murray, J.W. (2006). Ecology and applications of benthic foraminifera. <em>Cambridge, UK, Cambridge University Press.</em> 426pp., available online at http://www.cambridge.org/9780521828390 [details] Available for editors 
From editor or global species database