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Figure 5

Figure 5 — A comparison of the growth dynamics of a modern sea pen and an Ediacaran fossil. (A) A drawing of Pennatula phosphorea, a species of sea pen from the modern ocean. (B) A drawing of Charnia masoni, an Ediacaran fossil. Growth schematics show that for the Pennatulacea (C) insertion of new elements occurs at the base of the frond, in contrast to the Ediacaran fossils (D), where insertion of new elements occurs at the apex of the frond. (Antcliffe and Brasier (2008))

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