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Choia

Choia is a genus of extinct demosponge ranging from the Cambrian until the Lower Ordovician periods. Fossils of Choia have been found in the Burgess Shale in British Columbia; the Maotianshan shales of China; the Wheeler Shale in Utah; the Itajaí Basin in Brazil; and the Lower Ordovician Fezouata formation. It was first described in 1920 by Charles Doolittle Walcott.

Life habit
specimens Water is assumed to have entered the sponge parallel to the spines, being expelled, presumably, from a central opening. Species reached up to an average of 28 mm in diameter. == Distribution ==
Distribution
127 specimens of Choia are known from the Greater Phyllopod bed, where they comprise 0.2% of the community. USNM PAL 66487 Choia ridleyi Image 04.jpg|Fossils of C. ridleyi from the Burgess Shale Choia xiaolantianensis, Chengjiang biota.jpg|Fossil of C. xiaolantianensis from the Maotianshan Shales Choia sp. YPM IP 226567 2.jpg|Fossil of C. sp from the Fezouata biota Choia utahensis KUMIP 563095.jpg|Fossil of C. utahensis from the Wheeler Shale == References ==
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