| A (1 species) |
| Aleosteus - Late Emsian |
| B (0 species) |
| C (1 species) |
| Coccosteus - Middle Devonian-Late Devonian |
| D (2 species) |
| Dinichthys - Late Devonian, 380-360 Ma |
| Dunkleosteus - Frasnian-Famennian, 382-358 Ma |
| E (1 species) |
| Eastmanosteus - Middle to Late Devonian |
| F (0 species) |
| G (1 species) |
| Groenlandaspis - Late Devonian |
| H (0 species) |
| I (0 species) |
| J (0 species) |
| K (0 species) |
| L (0 species) |
| M (1 species) |
| Melanosteus - Late Frasnian[1] |
| N (0 species) |
| O (1 species) |
| Oxyosteus - Middle to Late Frasnian[1] |
| P (1 species) |
| Potangaspis - Early Devonian, 420 Ma |
| Q (0 species) |
| R (1 species) |
| Rolfosteus - Frasnian |
| S (0 species) |
| T (2 species) |
| Titanichthys - Famennian |
| Tubonasus - Frasnian |
| U (0 species) |
| V (0 species) |
| W (1 species) |
| Wuttagoonaspis - Middle Devonian |
| X (0 species) |
| Y (0 species) |
| Z (0 species) |