Subgenus

Sigmoopsis (Sigmoopsoides) Schallreuter, 1964

Selection of related publications

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

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.

Öpik, A. 1937. Ostracoda from the Ordovician Uhaku and Kukruse formations of Estonia. Tartu Ülikooli juures oleva Loodusuurijate Seltsi Aruanded 43, 65-138.

Öpik, A. 1937. Ostracoda from the Ordovician Uhaku and Kukruse formations of Estonia. Tartu Ülikooli Geoloogia Instituudi Toimetused 50, 1-58.

List of species

1. Sigmoopsis (Sigmoopsoides) niemeyeri Schallreuter, 1985 | Kunda Stage

2. Sigmoopsis (Sigmoopsoides) perpunctata (Öpik, 1937) | Aseri Stage→Idavere Substage

3. Sigmoopsis (Sigmoopsoides) sigmoopsoides Schallreuter, 1964 | Kukruse Stage→Jõhvi Substage

Classification

Organism group	Biota
Kingdom	Animalia
Phylum	Arthropoda
Subphylum	Crustacea
Superclass	Oligostraca
Class	Ostracoda
Subclass	Podocopa
Order	Palaeocopida
Suborder	Beyrichicopina
Superfamily	Tetradelloidea
Family	Tetradellidae
Subfamily	Sigmoopsinae
Genus	Sigmoopsis
Subgenus	(Sigmoopsis)
	(Sigmoopsoides)
Species	niemeyeri
	perpunctata
	sigmoopsoides
	granulata
	lamina
	platyceras
	rostrata