| উদ্ধৃতি | Branch, G.M., C.L. Griffiths, M.L. Branch and L. Beckley, 2005 Two oceans: a guide to marine life in southern Africa. Struik Publishers, Cape Town, 360 p. |
| সূত্র | 80553 Branch, G.M., C.L. Griffiths, M.L. Branch and L. Beckley, 2005 |
| পৃষ্ঠা | 52 |
| Named Used as Valid | Protula bispiralis |
| এলাকা | |
| Distribution | South Africa. |