Pirania is an extinct genus of sea sponge known from the Middle Cambrian Burgess Shale and the Ordovician Fezouata formation.

[3] It is named after Mount St. Piran, a mountain situated in the Bow River Valley in Banff National Park, Alberta.

[4] 198 specimens of Pirania are known from the Greater Phyllopod bed, where they comprise 0.38% of the community.

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