Subgenus

Tetrada (Tallinnopsis) Sarv, 1959

Selection of related publications

Sidaravičiene, N. 1992. Ordovician ostracods of Lithuania. pp. 1-252. LitNIIGRI.

Nõlvak, J. 1972. A characterization of the boundary beds of the Kukruse and Idavere stages in the Lipu boring. Loodusuurijate Seltsi Aastaraamat, pp. 39-59. Loodusuurijate Selts.

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.

Sarv, L. 1959. Ordovician ostracodes in the Estonian S.S.R.. ENSV TA Geoloogia Instituudi Uurimused IV, 1-210.

Sarv, L. I. 1956. New species of ostracodes of the Vasalemma Stage (Upper Ordovician of Estonia). ENSV TA Geoloogia Instituudi Uurimused I, 30-40.

Neckaja, A. I. 1953. Tetradellidy ordovika Pribaltiki i ih stratigraficheskoe znachenie. Trudy Vsesoûznogo Naučno-Issledovatel'skogo Geologo-Razvedočnogo Instituta (VNIGRI) 309-363. Gostoptehizdat.

Bonnema, J. H. 1909. Beiträge zur Kenntnis der Osrtacoden der Kuckersschen Schicht (C2). Mitteilungen Mineralogisch-Geologischen Instituts In Groningen 2, 1, 1-84.

List of species

1. Tetrada (Tallinnopsis) calkeri (Bonnema, 1909) | Uhaku Stage→Idavere Substage

2. Tetrada (Tallinnopsis) excisa Sidaravichiene, 1971 | Idavere Substage→Oandu Stage

3. Tetrada (Tallinnopsis) gudensis Sidaravičiene, 1992 | Keila Stage

4. Tetrada (Tallinnopsis) iewica (Neckaja, 1953) | Jõhvi Substage→Oandu Stage

5. Tetrada (Tallinnopsis) ordinata Sarv, 1959 | Keila Stage

6. Tetrada (Tallinnopsis) porosicalkeri Sidaravičiene, 1992 | Kukruse Stage→Jõhvi Substage

7. Tetrada (Tallinnopsis) ramigalensis Sidaravičiene, 1992 | Uhaku Stage→Idavere Substage

8. Tetrada (Tallinnopsis) vaiguvenis Sidaravičiene, 1992 | Idavere Substage→Oandu Stage

9. Tetrada (Tallinnopsis) vievensis Sidaravičiene, 1992 | Kukruse Stage→Jõhvi Substage

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)
Species	calkeri
	excisa
	gudensis
	iewica
	ordinata
	porosicalkeri
	ramigalensis
	vaiguvenis
	vievensis
Subgenus	(Tetrada)
Species	hibyi
	ventroconcava
Subspecies	troppenzorum