Archisaccophyllia kunmingensis, Hou et al. 2005, 20 mm
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Haikouella lanceolata to 3 cm long, Lower Cambrian, Chengjiang biota. 6 pairs of branchial arches are visible as is an eye.
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(STRA41) Fluvial cross bedding in the Cambrian Chapel Rock Fm., Pictured Rocks National Lakeshore MI
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