†family Spirostylidae Cossmann 1909 (snail)
Gastropoda - Murchisoniina - Spirostylidae
Parent taxon: Loxonematoidea according to W. F. Ponder and A. Warén 1988
See also Bouchet et al. 2005
Sister taxa: Acrospira, Crassimarginatidae, Loxonematidae, Palaeozygopleuridae, Scoliostomatidae, Soleniscidae, Vetotuba, Zygopleuridae
Subtaxa: Doellocosmia Euthystylus Heligmostylus Spirostylus
Ecology: facultatively mobile epifaunal suspension feeder
Distribution: