Family Sphaerulariidae Lubbock 1865 (roundworm)
Enoplea - Rhabditida - Sphaerulariidae
Parent taxon: Sphaerularioidea according to G. O. Poinar 2011
Sister taxa: Allantonematidae, Anguinidae, Iotonchidae
Subtaxa: Tripius
Distribution: found only at Baltic Amber, Poinar collection (Eocene of Russian Federation)