| Citation | Tunnell, J.W., 2010 Encyclopedia of Texas seashells: identification, ecology, distribution, and history. Texas A&M University Press, 527 p. |
| Ref. | 108635 Tunnell, J.W., 2010 |
| Page | 412 |
| Named Used as Valid | Drillia cydia |
| Locality | |
| Distribution | USA. |