ammonites
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

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Type: Ellesmerespongia feildeni

Ecology: stationary epifaunal suspension feeder