†family Gagarinicyathidae Debrenne et al. 1989 (archaeocyath sponge)
Archaeocyatha - Ajacicyathida - Gagarinicyathidae
Parent taxon: Annulocyathoidea according to F. Debrenne et al. 2015
Sister taxa: Annulocyathidae, Jakutocarinidae, Tumulifungiidae
Subtaxa: Gagarinicyathus
Type: Gagarinicyathus
Ecology: stationary intermediate-level epifaunal suspension feeder
Distribution: found only at Lena River, Oy-Muran (Kokoulinsk) bioherm complex, unit 11-13 biostrome 2 (Cambrian of Russian Federation)