†order Siphonotretida Gorjansky 1960 (lamp shell)
Parent taxon: Lingulata according to J. Hansen and L. E. Holmer 2011
See also Holmer 1989, Popov et al. 2002, Puura and Holmer 1993 and Williams et al. 2000
Sister taxa: Acrotretida, Discinida, Lingulida
Subtaxa: Siphonotretacea Siphonotretoidea
Ecology: stationary low-level epifaunal suspension feeder