†family Piretellidae Opik 1937 (ostracod)
Ostracoda - Palaeocopida - Piretellidae
Parent taxon: Eurychilinoidea according to A. Liebau 2005
See also Abushik and Evdokimova 2016 and Benson et al. 1961
Sister taxa: Bolbinidae, Eurychilinidae, Hollinidae, Oepikellidae
Subtaxa: Tvaerenella
Ecology: epifaunal suspension feeder
Distribution:
• Ordovician of Argentina (1 collection), Latvia (3), the Russian Federation (8), Sweden (2)
Total: 14 collections each including a single occurrence