Identification keys available for Order Cyprinodontiformes
| Key | Title |
| 28 | Key to the topminnows (Family Cyprinodontidae) of southern Africa. |
| 90 | Key to the killifishes (Cyprinodontidae) of Canada. |
| 282 | Key to Species of Phallotorynus Henn, 1916 (Poeciliidae:Poeciliinae) |
| 568 | Key to species of Jenynsia from southern Brazil. |
| 570 | Artificial key to the species of the Rivulus punctatus complex. |
| 967 | Key to the species of New World rivulines (rivulid killifishes) (Rivulidae) occurring in the Western Central Atlantic. |
| 968 | Key to the species of fundulid killifishes (Fundulidae) occurring in the Western Central Atlantic. |
| 969 | Key to the species of foureyed fishes (Anablepidae) occurring in the Western Central Atlantic. |
| 970 | Key to the genera of livebearers (Poeciliidae) occurring in the Western Central Atlantic. |
| 971 | Key to the species of pupfishes (Cyprinodontidae) occurring in the Western Central Atlantic. |
| 1119 | Key to species of Cynolebias occurring in Brazil. |
| 1128 | Key to species of Fluviphylax. |
| 1154 | Artificial key to the species of the Rivulus punctatus complex. |
| 1166 | Identification key to the species of the Cyprinodon eximius complex. |
| 1310 | Key to species of Poeciliid fish reported from New Zealand. |
| 1451 | Key to families of Cyprinodontiformes of West Africa. |
| 1452 | Key to subfamilies of Poeciliidae of West Africa. |
| 1453 | Key to genera of Procatopodinae of West Africa. |
| 1454 | Key to species of Procatopus of West Africa. |
| 1455 | Key to species of Poropanchax of West Africa. |
| 1456 | Key to species of Rhexipanchax of West Africa. |
| 1457 | Key to species of Micropanchax of West Africa. |
| 1458 | Key to subfamilies of Aplocheilidae of West Africa. |
| 1459 | Key to genera of Epiplatyinae of West Africa. |
| 1460 | Key to species of Epiplatys of West Africa. |
| 1461 | Key to species of Callopanchax of West Africa. |
| 1462 | Key to species of Archiaphyosemion of West Africa. |
| 1463 | Key to species of Scriptaphyosemion of West Africa. |
| 1464 | Key to genera of Nothobranchiinae of West Africa. |
| 1465 | Key to species of Fundulopanchax of West Africa. |
| 1466 | Key to species of Aphyosemion of West Africa. |
| 1658 | Key to the Poeciliidae of Lower Guinea, West-central Africa |
| 1659 | Key to the genera of Poeciliidae (subfamily Procatopodinae) of Lower Guinea, West-Central Africa. |
| 1660 | Key to the Poropanchax species of Lower Guinea, West-Central Africa. |
| 1661 | Key to the Micropanchax species from Lower Guinea, West-Central Africa. |
| 1662 | Key to the Plataplochilus species of Lower Guinea, West-Central Africa. |
| 1663 | Key to the Procatopus species of Lower Guinea, West-Central Africa. |
| 1664 | Key to the Hypsopanchax species of Lower Guinea, West-Central Africa. |
| 1665 | Key to the Aplocheilidae subfamilies of Lower Guinea, West-Central Africa. |
| 1666 | Key to the Epiplatys species of Lower Guinea, West-Central Africa. |
| 1667 | Key to the Aplocheilidae (subfamily Nothobranchiinae) of Lower Guinea, West-Central Africa. |
| 1668 | Key to the Fundulopanchax species of Lower Guinea, West-Central Africa. |
| 1669 | Key to the Aphyosemion species of Lower Guinea, West-Central Africa. |