†family Styliolinidae Grabau and Shimer 1910 (mollusk)
Synonym: Styliolitidae Gürich 1908
Parent taxon: Styliolinida according to N. M. Farsan 1994
Sister taxon: Viriatellidae
Subtaxa: Styliacus, Styliolina, Styliolites
Ecology: stationary semi-infaunal suspension feeder