Rhynchonellata - Spiriferida

Parent taxon: Delthyridina according to A. Williams et al. 2006

See also Johnson 1995

Sister taxon: Reticularioidea

Subtaxa: Acrospiriferidae Cyrtinopsidae Delthyrididae Filispiriferidae Hysterolitidae Mucrospiriferidae

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Ecology: stationary epifaunal suspension feeder

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