Fieldospongia
Fieldospongia is a genus of sea sponge known from the Middle Cambrian Burgess Shale. Just five specimens of "Fieldospongia" are known from the Greater Phyllopod bed, where they comprise less than 0.1% of the community. Described in 1920 as "Tuponia bellilineata" by Walcott in his monograph on sponges from the Burgess Shale, this form has now been placed within a separate genus, "Fieldospongia", erected by Rigby in 1986. The only known specimen purportedly came from the Mount Whyte Formation