Genus
Trimerocephalus M'Coy, 1849
Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Arthropoda |
| Subphylum | Trilobita |
| Order | Phacopida |
| Suborder | Phacopina |
| Family | Phacopidae |
| Genus | Acernaspis |
| Ananaspis | |
| Eophacops | |
| Trimerocephalus |
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Arthropoda |
| Subphylum | Trilobita |
| Order | Phacopida |
| Suborder | Phacopina |
| Family | Phacopidae |
| Genus | Acernaspis |
| Ananaspis | |
| Eophacops | |
| Trimerocephalus |