UCMP MYSTERY FOSSIL #36 is . . .
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Sawdonia is considered a zosterophyll, a plant lacking true leaves and roots that may be ancestral to the lycophytes (club mosses). Zosterophylls differed from other plants of its time in that their sporangia (structures in which spores are produced) were somewhat round and were arranged in clusters along branches on small stalks (see reconstruction at right), as in the later lycophytes. Learn more about zosterophylls here. |
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