Species
Triarthrus freji Thorslund, 1940
Synonymy list
1940 Triarthrus freji n. sp. — Thorslund , pp. 130
1998 Triarthrus freji Thorslund, 1940 — Mansson , pp. 52, fig. Figs 4b, 8a-g and 9a-h
Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Arthropoda |
| Subphylum | Trilobita |
| Order | Ptychopariida |
| Suborder | Olenina |
| Family | Olenidae |
| Superfamily | Triarthrinae |
| Genus | Triarthrus |
| Species | freji |
| jemtlandicus | |
| linnarssoni | |
| Triarthrus |