Subfamily
Monorakinae Kramarenko, 1952
Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Arthropoda |
| Subphylum | Trilobita |
| Order | Phacopida |
| Suborder | Phacopina |
| Family | Pterygometopidae |
| Subfamily | Chasmopsinae |
| Eomonoracheinae | |
| Monorakinae | |
| Genus | Monorakos |
| Subfamily | Pterygometopinae |