†subfamily Cystothalamiinae Girty 1908 (demosponge)
Demospongiae - Agelasida - Sebargasiidae
Parent taxon: Sebargasiidae according to B. Senowbari-Daryan et al. 2007
Sister taxa: Amblysiphonella, Calabrisiphonella, Chinaspongia, Crymocoelia, Laccosiphonella, Lingyunocoelia, Minisiphonella, Oligocoelia, Paramblysiphonella, Polycystocoelia, Pseudoamblysiphonella, Pseudoguadalupia, Sebargasia, Sebargasiinae, Stylocoelia, Vesicotubularia
Subtaxa: none
Ecology: stationary epifaunal suspension feeder
Distribution: there are no occurrences of Cystothalamiinae in the database