Redoubtia polypodia is a fossil from the Burgess Shale that was originally described (and later refigured) by Charles Walcott as a holothurian echinoderm.Walcott, C. D. 1931 Addenda to descriptions of Burgess Shale fossils. Smithson. Misc. Collect. 85, 1–46. Its affinity is unclear, though; it has also been compared to lobopodians.Conway Morris, S. 1993 Ediacaran-like fossils in Cambrian Burgess Shale-type faunas of North America. Palaeontology 36, 593–635.
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