Sponges occur widespread in Permian formations in western Ellesmere Island on Fosheim, Raanes, and Bjorne Peninsulas. Scheiia tuberosa Tschernyschew and Stepanov, 1916, is described from the Assistance and Tanquary formations and is the most widely occurring sponge in the collections. Haplistion arcticum (Dunikowski, 1884), Haplistion latituba (Dunkowski, 1884), Haplistion diactinum n. sp., and Raanespongia monilis, n. gen. and n. sp., all occur in the Assistance Formation. Raanespongia monilis n. sp. is the basis of the new family Raanespongiidae which is included in the Eutaxicladina.

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