Burgess Shale sponge

Reconstruction of the sponge, Canistrumella alternata, from the Middle Cambrian Burgess Shale (Stephen Formation) of British Columbia. Only a single specimen of this elegant wine-glass shaped sponge has so far been recovered. Its alternating bands of perf

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Alternata Burgess Cambrian Columbia Columbian Extinct Extinction Fossil Fossilized Fossils Illustrated Illustration Illustrations Painting Paintings Paleozoic Period Prehistoric Prehistory Reconstruction Reconstructions Shale Sponge Sponges Stephen

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