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