†Cystothalamiella polyducta Rigby et al. 1988 (demosponge)
Demospongea - Agelasida - Aphrosalpingidae
Full reference: J. K. Rigby, A. W. Potter, and R. B. Blodgett. 1988. Ordovician sphinctozoan sponges of Alaska and Yukon Territory. Journal of Paleontology 62(5):731-746
Belongs to Cystothalamiella according to J. K. Rigby et al. 1988
Sister taxa: Cystothalamiella alaskaensis, Cystothalamiella craticulata, Cystothalamiella ducta, Cystothalamiella irregularis, Cystothalamiella tuboides
Type specimen: USNM 417214
Ecology: stationary epifaunal suspension feeder