Genus
Sphenomectris Wilson & Caldwell, 1998
Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Chordata |
| Subphylum | Vertebrata |
| Superclass | Agnatha |
| Class | Pteraspidomorphi |
| Subclass | Thelodonti |
| Order | Furcacaudiformes |
| Family | Furcacaudidae |
| Genus | Canonia |
| Cometicercus | |
| Drepanolepis | |
| Furcacauda | |
| Sphenomectris |