Species
Tetrada (Tetrada) memorabilis (Neckaja, 1953)
Synonymy list
1953     Tetradella memorabilis  — Neckaja 
1959     Tallinnopsis memorabilis (Neckaja) — Sarv , pp. 68, fig. 13:8-11
1976     Tetrada memorabilis (Neckaja, 1953) — Schallreuter , pp. 165-173, fig. 1:1-4
1982     Tallinnopsis memorabilis (Neckaja) — Ulst et al. , pp. 124
1983     Tetrada memorabilis (Neckaja, 1953) — Schallreuter , pp. 176, fig. 11:6
1990     Tetrada memorabilis (Neckaja, 1953) — Schallreuter , fig. 2:4.5
1992     Tetrada (Tetrada) memorabilis (Neckaja, 1953) — Sidaravičiene , pp. 113, fig. 29:10
2022     Tetrada (Tetrada) memorabilis (Neckaja, 1953) — Melnikova et al. , fig. 2:14-16
Selection of related publications
Sarv, L. 1959. Ordovician ostracodes in the Estonian S.S.R..  ENSV TA Geoloogia Instituudi Uurimused   IV,      1-210.
Neckaja, A. I. 1953. Tetradellidy ordovika Pribaltiki i ih stratigraficheskoe znachenie.  Trudy Vsesoûznogo Naučno-Issledovatel'skogo Geologo-Razvedočnogo Instituta (VNIGRI)         309-363.  Gostoptehizdat. 
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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
- Sidaravičiene, 1992 Paukšciai 192 borehole 541.7 - 547.2
- Sidaravičiene, 1992 Vangishki 205 borehole 426.7 - 436.7
- Sidaravičiene, 1992 Virbališkes 434 borehole 848.5 -
- Neckaja, 1953 Aluvere quarry Jõhvi Substage
- Neckaja, 1953 Rausvere quarry Jõhvi Substage
- Neckaja, 1953 Tammiku quarry, Ida-Virumaa Jõhvi Substage
- Sarv, L., 1959 Aluvere quarry
- Sarv, L., 1959 Sõjamägi
- Sarv, L., 1959 Humala 116 borehole