Subfamily
Eomonoracheinae Pillet, 1954
List of species
1. Calyptaulax (Homalops) lesnikovae Krylov, 2019 | Idavere Substage
Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Arthropoda |
| Subphylum | Trilobita |
| Order | Phacopida |
| Suborder | Phacopina |
| Family | Pterygometopidae |
| Subfamily | Chasmopsinae |
| Eomonoracheinae | |
| Genus | Calyptaulax |
| Subfamily | Monorakinae |
| Pterygometopinae |