Loeblich, A. R.; Tappan, H. (1987). Foraminiferal Genera and their Classification. Van Nostrand Reinhold Company, New York. 970pp., available online at (https://books.google.pt/books?id=n_BqCQAAQBAJ) page(s): pl. 337 figs. 13-19 Holocene. Mediterranean. 13. Transverse section of central part of microspheric test, x 267: 14. 15, opposite sides of adult, x 17; 16, 17, proloculus only, in edge and side views, x 35; 18, 19, edge and side view of two-chambered individual, x 35 (from Schlumberger. 1886. p. 328).
