| Citation | Harbo, R.M., 1997 Shells and shellfish of the Pacific Northwest, a field guide. Harbour Publishing, Canada, 270p. |
| Ref. | 95344 Harbo, R.M., 1997 |
| Page | 14 |
| Named Used as Valid | Megayoldia thraciaeformis |
| Locality | |
| Distribution | Circumpolar, southern Arctic to California, USA. |