Rhynchonellata - Spiriferida - Spiriferidae

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

Sister taxa: Allanaria, Brachythyrinae, Delthyrinae, Ovispirifer, Prospirinae, Purdonellinae, Spiriferinae

Subtaxa: Afghanospirifer, Anthracospirifer, Cancellospirifer, Eobrachythyris, Eochoristitella, Kasakhstania, Sergospirifer

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Type: Sergospirifer

Ecology: stationary epifaunal suspension feeder