†family Xylodisculidae Warén 1992 (snail)
Gastropoda - Heterostropha - Xylodisculidae
Parent taxon: Allogastropoda according to S. Kiel and J. L. Goedert 2007
See also Beesley 1998
Sister taxa: Ampezzanildidae, Heterodiscohelix, Levihelix, Mathildoidea
Subtaxa: Xylodiscula
Ecology: epifaunal
Distribution: found only at Merrick's Bay (Oligocene to Miocene of Washington)