†family Sigmoopsidae Henningsmoen 1953 (ostracod)

Ostracoda - Palaeocopida - Sigmoopsidae

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

Parent taxon: Tetradelloidea according to A. Liebau 2005

Sister taxa: Ctenoloculinidae, Ctenonotellidae, Soanellidae

Subtaxa: none

Ecology: epifaunal suspension feeder

Distribution:

• Uhaku of Sweden (2 collections)

• Chazyan of Canada (2: Northwest Territories)

• Ordovician of Canada (2: Northwest Territories, Québec), Latvia (5), Morocco (1), the Russian Federation (8), Sweden (7)

Total: 27 collections including 37 occurrences

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