†Ellesmerespongia Rigby 1970 (demosponge)
Demospongea - Orchocladina - Astylospongiidae
Full reference: J. K. Rigby. 1970. Ellesmerespongia feildeni, a new Permian sponge from the Canadian Arctic. Journal of Paleontology 44(6):1143-1145
Parent taxon: Astylospongiidae according to R. M. Finks et al. 2004
Sister taxa: Astyloscyphia, Astylospongia, Astylospongiella, Astylostroma, Astylotuba, Attungaia, Camellaspongia, Carpospongia, Caryospongia, Devonoscyphia, Globispongia, Jazwicella, Palaeomanon, Phialaspongia, Raanespongia, Shuqraiopsis
Subtaxa: Ellesmerespongia feildeni
Type: Ellesmerespongia feildeni
Ecology: stationary epifaunal suspension feeder