Subfamily
Richardosteus Long, Mark-Kurik et Young, 2014
Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Chordata |
| Subphylum | Vertebrata |
| Organism group | Gnathostomata |
| Class | Placodermi |
| Order | Arthrodira |
| Superfamily | Buchanosteoidae |
| Family | Buchanosteidae |
| Subfamily | Richardosteus |
| Genus | Buchanosteus |