| Authors(s) | Brummer G.J.A., Hemleben Ch., Spindler M. |
| Year | 1987 |
| Title | Ontogeny of extant spinose planktonic Foraminifera (Globigerinidae), a concept exemplified by Globigerinoides sacculifer (Brady) and G. ruber (d'Orbigny). Mar. Micropaleontol., 12:357-381. |