What is "takakkawia"

Takakkawia is a genus of sponge 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 named by Walcott after the Takakkaw falls which mark the start of the trail to Fossil Ridge.