†Cystothalamiella (demosponge)
Demospongea - Agelasida - Aphrosalpingidae
Parent taxon: Aphrosalpingidae according to J. K. Rigby et al. 1994
Sister taxa: Fistulospongininae, Nematosalpinx, Palaeoschadinae, Vesicocauliinae
Subtaxa: Cystothalamiella alaskaensis, Cystothalamiella craticulata, Cystothalamiella ducta, Cystothalamiella irregularis, Cystothalamiella polyducta, Cystothalamiella tuboides
Type: Cystothalamiella ducta
Ecology: stationary epifaunal suspension feeder