| A (3 species) |
| Aegirocassis - Early Ordovician |
| Amplectobelua - Chengjiang-Middle Cambrian |
| Anomalocaris - Early to mid Cambrian: Chengjiang-Burgess shale |
| B (0 species) |
| C (0 species) |
| D (0 species) |
| E (0 species) |
| F (0 species) |
| G (0 species) |
| H (1 species) |
| Hurdia - Mid Cambrian |
| I (0 species) |
| J (0 species) |
| K (1 species) |
| Kerygmachela - Cambrian Stage 3 |
| L (0 species) |
| M (0 species) |
| N (0 species) |
| O (1 species) |
| Opabinia - Middle Cambrian |
| P (2 species) |
| Pambdelurion - Cambrian stage 3 |
| Peytoia - Early Cambrian |
| Q (0 species) |
| R (0 species) |
| S (0 species) |
| T (1 species) |
| Tamisiocaris - Cambrian, Cambrian Stage 3 |
| U (0 species) |
| V (0 species) |
| W (0 species) |
| X (0 species) |
| Y (0 species) |
| Z (0 species) |