Family
Pugnacidae Rzhonsnitskaya, 1965
Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Brachiopoda |
| Subphylum | Rhynchonelliformea |
| Class | Rhynchonellata |
| Order | Rhynchonellida |
| Superfamily | Pugnacoidea |
| Family | Petasmariidae |
| Pugnacidae | |
| Genus | Pugnax |