| 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. | Gregorioiscala pachya | |
| 83435 | Rosenberg, G. 2009 Malacolog 4.1.1: A Database of Western Atlantic Marine Mollusca. | Gregorioiscala pachya | |
| 109264 | Rosenberg, G., F. Moretzsohn and E.F. Garcia 2009 Gastropoda (Mollusca) of the Gulf of Mexico. | Gregorioiscala pachya | 642 |