| Ref. | Description | Named Used | Page |
|---|---|---|---|
| 833 | Ruppert, E.E., R.S. Fox and R.D. Barnes 2004 Invertebrate Zoology. A functional evolutionary approach. 7th Ed. | Opalia longissima | |
| 86518 | Poppe, G.T. 2008 Philippine marine mollusks. Vol. 1 (Gastropoda - Part 1). | Opalia longissima | 108, 708, pl 299 |