Genus
Valdarella Qvale, 1980
Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Arthropoda |
| Subphylum | Crustacea |
| Superclass | Oligostraca |
| Class | Ostracoda |
| Subclass | Podocopa |
| Order | Palaeocopida |
| Suborder | Beyrichicopina |
| Superfamily | Tetradelloidea |
| Family | Tetradellidae |
| Subfamily | Sigmoopsinae |
| Genus | Concavhithis |
| Lomatobolbina | |
| Semibolbina | |
| Severella | |
| Severobolbina | |
| Seviculina | |
| Sigmoopsis | |
| Valdarella |