Genus
Spathacalymene Tillman, 1960
Klassificering
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Arthropoda |
| Subphylum | Trilobita |
| Order | Phacopida |
| Suborder | Calymenina |
| Family | Calymenidae |
| Subfamily | Calymeninae |
| Genus | Alcymene |
| Calymene | |
| Diacalymene | |
| Flexicalymene | |
| Gravicalymene | |
| Liocalymene | |
| Papillicalymene | |
| Spathacalymene | |
| Species | nasuta |
| Genus | Sthenarocalymene |