Rhynchonellata - Spiriferida

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

Sister taxa: Adolfioidea, Ambocoelioidea, Brachythyridoidea, Cyrtioidea, Delthyridacea, Martinioidea, Paeckelmanelloidea, Spiriferoidea, Theodossioidea

Subtaxa: Conispiriferidae, Cyrtospiriferidae, Spinocyrtiidae

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Ecology: stationary epifaunal suspension feeder