Rhynchonellata - Athyridida

Parent taxon: Athyrididina according to P. Musteikis and T. L. Modzalevskaya 2002

See also Alvarez and Brunton 1993

Sister taxa: Apheathyris, Athyridacea, Athyridioidea, Athyridoidea, Meristelloidea, Nucleospiroidea, Retzielloidea

Subtaxa: Athyrididae Nucleospiridae

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Ecology: stationary low-level epifaunal suspension feeder

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