†family Grorudiidae Cocks and Rong 1989 (lamp shell)

Strophomenata - Strophomenida - Grorudiidae

Parent taxon: Plectambonitoidea according to M. Liljeroth et al. 2017

See also Williams et al. 2000 and Zhan and Jin 2005

Sister taxa: Aegiromenidae, Allwynellidae, Alwynellidae, Bimuriidae, Hesperomenidae, Leptellinidae, Leptestiidae, Paucicostella, Plectambonitidae, Sowerbyellidae, Syndielasmatidae, Taffiidae, Tafflidae, Xenambonitidae, Anoptambonitidae

Subtaxa: Calyptolepta Diambonioidea Grorudia Railtonella Tetraodontella

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Ecology: stationary epifaunal suspension feeder

Distribution:

• Ordovician of Canada (3: Newfoundland collections), China (12), Estonia (1), Iran (1), Ireland (3), Kazakhstan (2), Norway (9), the Russian Federation (2), Sweden (5)

• Castlemainian of Australia (1)

• Arenig of China (3)

Total: 42 collections including 44 occurrences

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