†family Zygopleuridae Wenz 1938 (snail)
Parent taxon: Loxonematoidea according to W. F. Ponder and A. Warén 1988
Sister taxa: Abyssochrysidae, Acrospira, Coelostylinidae, Crassimarginatidae, Loxonematidae, Palaeozygopleuridae, Pragozyga, Scoliostomatidae, Soleniscidae, Spirostylidae, Vetotuba
Subtaxa: Allostrophiinae, Ampezzopleurinae, Azyga, Zygopleurinae
Ecology: facultatively mobile epifaunal suspension feeder