Species
Tetrada ventroconcava Schallreuter, 1976
Synonymy list
1976     Tetrada ventroconcava — Schallreuter , pp. 164, 166, 174-175, fig. 2(35); Fig, 19-20;
1983     Tetrada ventroconcava Schallreuter, 1976 — Schallreuter , pp. 176-177
1990     Tetrada ventroconcava Schallreuter, 1976 — Schallreuter , fig. 2:2
Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Arthropoda | 
| Subphylum | Crustacea | 
| Superclass | Oligostraca | 
| Class | Ostracoda | 
| Subclass | Podocopa | 
| Order | Palaeocopida | 
| Suborder | Beyrichicopina | 
| Palaeocopa | |
| Family | Ctenonotellidae | 
| Genus | Tetrada | 
| Subgenus | (Neotsitrella) | 
| (Perplana) | |
| (Tallinnopsis) | |
| (Tetrada) | |
| Species | hibyi | 
| ventroconcava | |
| Subspecies | troppenzorum |