Ostracoda
Genus

Tetrada Neckaja, 1958

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Selection of related publications
Meidla, T. 1996. Late Ordovician Ostracodes of Estonia. Fossilia Baltica 2. pp. 1-222. Tartu University Press.
Sidaravičiene, N. 1992. Ordovician ostracods of Lithuania. pp. 1-252. LitNIIGRI.
Meidla, T. 1986. Neue Ostrakoden aus dem Ordovizium des Baltikums. Eesti NSV Teaduste Akadeemia Toimetised. Geoloogia / Известия Академии наук Эстонской ССР. Геология 35, 1, 10-19. DOI:10.3176/geol.1986.1.02
Sidaravičiene, N. 1971. New ostracoda from Middle and Upper Ordovician of Lithuania.Palaeontology and stratigraphy of the Baltic and Byelorussia. Number III , pp. 23-36. Mintis.
Neckaja, A. I. 1953. Tetradellidy ordovika Pribaltiki i ih stratigraficheskoe znachenie. Trudy Vsesoûznogo Naučno-Issledovatel'skogo Geologo-Razvedočnogo Instituta (VNIGRI) 309-363. Gostoptehizdat.
List of species
1. Tetrada (Perplana) bisulcata (Sarv, 1963) | Idavere SubstageOandu Stage
4. Tetrada (Perplana) perplana (Neckaja, 1953) | Uhaku StageOandu Stage
5. Tetrada (Tallinnopsis) excisa Sidaravichiene, 1971 | Idavere SubstageOandu Stage
9. Tetrada (Tallinnopsis) vaiguvenis Sidaravičiene, 1992 | Idavere SubstageOandu Stage
10. Tetrada (Tallinnopsis) vievensis Sidaravičiene, 1992 | Kukruse StageJõhvi Substage
12. Tetrada (Tetrada) harpa (Krause, 1892) | Keila StageOandu Stage
13. Tetrada (Tetrada) krausei (Steusloff, 1895) | Idavere SubstageRakvere Stage
14. Tetrada (Tetrada) memorabilis (Neckaja, 1953) | Idavere SubstageKeila Stage
15. Tetrada (Tetrada) neckajae Meidla, 1986 | Nabala StageVormsi Stage
16. Tetrada (Tetrada) ovalis (Sarv, 1959) | Keila StageOandu Stage
17. Tetrada (Tetrada) pseudoiewica Sidaravičiene, 1992 | Jõhvi SubstageOandu Stage
18. Tetrada (Tetrada) variabilis Meidla, 1986 | Rakvere StageNabala Stage
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References based on distribution