Genus
Tritonophon Öpik, 1953
List of species
1. Tritonophon subtrilobatus (Troedsson, 1918) | Pirgu Stage
Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Mollusca |
| Class | Gastropoda |
| Order | Bellerophontida |
| Suborder | Bellerophontina |
| Superfamily | Bellerophontoidea |
| Family | Bucaniidae |
| Subfamily | Plectonotinae |
| Genus | Tetranota |
| Tritonophon | |
| Species | subtrilobatus |