Identification keys available for Family Hexanchidae
| Key | Title |
| 29 | Key to the species of cowsharks, sixgill, and sevengill sharks (Hexanchidae) occuring in the Western Central Pacific. |
| 869 | Key to the species of cowsharks, sixgill, and sevengill sharks (Hexanchidae) occurring in the Western Central Atlantic. |
| 1317 | Key to the Hexanchidae of Alaska. |