Species
Tetrada (Tetrada) krausei (Steusloff, 1895)
Synonymy list
1895     Beyrichia Krausei  n. sp. — Steusloff , pp. 779, fig. 58:26
1959     Tallinnopsis iewica (Neckaja) — Sarv , pp. 68-69
1966     Tallinnopsis iewica (Neckaja) — Männil , pp. 96, 103
1971     Tetrada iewica (Neckaja) — Sidaravičiene , pp. 32
1971     Tetrada krausei (Steusloff, 1895) — Schallreuter , pp. 691
1979     Tetrada krausei (Steusloff, 1895) — Ivanova , pp. 145-146
1982     Tetrada iewica (Neckaja) — Ulst et al. , pp. 119, 124
1988     Tetrada troppenzorum sp. n. — Schallreuter , pp. 7, fig. 1:2-3
1990     Tetrada krausei (Steusloff, 1895) — Schallreuter , fig. 2:3
1990     Tetrada krausei (Steusloff, 1895) — Schallreuter , fig. 2:3
Selection of related publications
Meidla, T. 1996. Late Ordovician Ostracodes of Estonia. Fossilia Baltica 2. pp. 1-222.  Tartu University Press. 
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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 | (Tetrada) | 
| Species | grandis | 
| harpa | |
| krausei | |
| memorabilis | |
| neckajae | |
| ovalis | |
| pseudoiewica | |
| variabilis | 
References based on distribution
- Meidla, 1996a Orjaku borehole 133.7 - 134.7
- Meidla, 1996a Virtsu 360 borehole 225.4 -
- Meidla, 1996a Laiamäe F-259 borehole 62.5 -
- Sidaravičiene, 1992 Krekenava 7 borehole 927 - 934.5
- Sidaravičiene, 1992 Sutkai 89 borehole 1192.4 -
- Sidaravičiene, 1992 Drukshiai 324 borehole 441.4 -