| Key | Title |
| 28 | Key to the topminnows (Family Cyprinodontidae) of southern Africa. |
| 90 | Key to the killifishes (Cyprinodontidae) of Canada. |
| 971 | Key to the species of pupfishes (Cyprinodontidae) occurring in the Western Central Atlantic. |
| 1166 | Identification key to the species of the Cyprinodon eximius complex. |