Geological Range: Notes: Choanoflagellates do not have a documented fossil record but are thought to be sister group to sponges and so are probably an ancient group of eukaryotes. Last occurrence (top): Extant. Data source: First occurrence (base): within Cambrian Period (485.37-541.00Ma, base in Fortunian stage). Data source:
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Choanoflagellates compiled by Jeremy R. Young viewed: 29-3-2023
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