Rhynchonellata - Athyridida

Parent taxon: Athyridida according to A. Williams et al. 2002

See also Jin and Chatterton 1997 and Shen et al. 2003

Sister taxa: Anoplothecoidea, Athyrididina, Dayioidea, Koninckinidina, Uncitoidea

Subtaxa: Mongolospiroidea Retzioidea Rhynchospirinoidea

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Ecology: stationary low-level epifaunal suspension feeder

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