†order Rhizostomeae
Alternative spelling: Rhizostomatida
Parent taxon: Discomedusae according to H. Van Iten et al. 2014
See also Bayer et al. 1956 and Sepkoski 2002
Sister taxon: Semaeostomeae
Subtaxa: Leptobrachiidae Prothysanostoma Simplicibrachia
Distribution: