original description
Chaster, G. W. (1892). Report upon the foraminifera of the Southport Society of Natural Science district. First report Southport Society of Natural Science (1890-1891), appendix: 54-72., available online at https://books.google.pl/books/about/Report.html?id=wFM6AQAAMAAJ
page(s): p. 58, pl. 1, fig. 4. [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