Species
Protitanichthys fossatus Eastman, 1907
Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Chordata |
| Subphylum | Vertebrata |
| Infraphylum | Gnathostomata |
| Class | Placodermi |
| Order | Euarthrodira |
| Suborder | Coccosteina |
| Superfamily | Coccosteoidea |
| Family | Coccosteidae |
| Genus | Protitanichthys |
| Species | fossatus |