†subfamily Sergospiriferinae Carter 1994 (lamp shell)
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
Type: Sergospirifer
Ecology: stationary epifaunal suspension feeder