†subfamily Sigmoopsinae Henningsmoen 1953 (ostracod)

Ostracoda - Palaeocopida - Tetradellidae

Alternative spelling: Sigmoopsiidae

Full reference: G. Henningsmoen. 1953. Lower Ordovician Ostracods from the Oslo region, Norway. Norsk Geologisk Tidsskrift 33:41-68

Parent taxon: Tetradellidae according to R. Schallreuter and I. Hinz-Schallreuter 2011

See also Benson et al. 1961, Henningsmoen 1953, Jaanusson 1957, Liebau 2005, Martinsson 1962, Přibyl 1975 and Vannier 1987

Sister taxa: Bassleratiinae, Bellornatia, Fidelitella, Foramenella, Hippula, Kiesowia, Ogmoopsis, Perspicillinae, Piretellinae, Raymondatia, Reuentalina, Tetradella, Tetradellinae, Ushkarella, Vittella

Subtaxa: Glossomorphitinae Sigmoopsiinae

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Type: Sigmoopsis

Ecology: epifaunal suspension feeder

Distribution:

• Volkhov of Lithuania (1 collection), Norway (2), the Russian Federation (1)

• Hunderum of Norway (4)

• Ordovician of India (1), Sweden (2)

Total: 11 collections including 16 occurrences

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