†family Tetrarhynchiidae Ager 1965 (lamp shell)
Rhynchonellata - Rhynchonellida
Parent taxon: Hemithiridoidea according to A. Williams et al. 2002
Sister taxa: Cyclothyrididae, Hemithirididae, Notosariidae, Septirhynchiidae, Triasorhynchiidae
Subtaxa: Cretirhynchiinae, Gibbirhynchiinae, Isjuminellinae, Kallirhynchiinae, Tetrarhynchiinae, Viarhynchiinae
Ecology: stationary epifaunal suspension feeder