''Takakkawia'' is a genus of

sponge Sponges, the members of the phylum Porifera (; meaning 'pore bearer'), are a basal animal clade as a sister of the diploblasts. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through t ...

in the order Protomonaxonida and the family Takakkawiidae. It is known from the Middle Cambrian Burgess Shale that reached around 4 cm in height. Its structure comprises four columns of multi-rayed, organic spicules (perhaps originally calcareous or siliceous) that align to form flanges. The spicules form blade-like structures, ornamented with concentric rings. It was first described in 1920 by Charles Doolittle Walcott. Takakkaw Falls which mark the start of the trail to Fossil Ridge. 1377 specimens of ''Takakkawia'' are known from the Greater Phyllopod bed, where they comprise 2.62% of the community.

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Image of fossil
from the Peabody Museum of Natural History
''Takakkawia''
at fossilworks Burgess Shale fossils Protomonaxonida Burgess Shale sponges Prehistoric sponge genera Taxa named by Charles Doolittle Walcott Fossil taxa described in 1920 Cambrian genus extinctions {{demosponge-stub