Infraorder Umbonulomorpha Gordon 1989
Parent taxon: Flustrina according to S. S. Brezina et al. 2021
See also Berning 2006, Gordon et al. 1994, Guha and Gopikrishna 2007 and Schmidt 2003
Sister taxa: Buguloidea, Calloporoidea, Cribrilinoidea, Flustroidea, Microporoidea, Monoporelloidea, Thalamoporelloidea
Subtaxa: Arachnopusioidea Batoporoidea Lepralielloidea