†family Sigmoopsiidae Henningsmoen 1953 (ostracod)

Ostracoda - Beyrichiacea - Sigmoopsiidae

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

Parent taxon: Beyrichiacea according to G. Henningsmoen 1953

Sister taxa: Acronotellidae, Eurychilinidae, Tetradellidae, Uncertain, Zygobolbidae

Subtaxa: Glossomorphitinae Sigmoopsiinae

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Ecology: epifaunal

Distribution:

• Silurian of Australia (1 collection)

• Ordovician of India (1), Latvia (6), Lithuania (1), Norway (9), Portugal (1), the Russian Federation (6), Sweden (16), United States (3: Iowa, Minnesota)

• Llandeilo of Sweden (2)

Total: 46 collections including 58 occurrences

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