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Devonian gametophytes with anatomically preserved gametangia.

W Remy, R Remy

    Science (New York, N.Y.)
    |April 18, 1980
    PubMed
    Summary
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    The oldest fossil gametophytes, dating to the Lower Devonian, reveal early land plant reproduction. These well-preserved specimens show distinct structures for both male and female reproductive organs.

    Area of Science:

    • Paleobotany
    • Evolution of land plants
    • Reproductive biology

    Background:

    • Understanding early land plant evolution is crucial for reconstructing terrestrial ecosystems.
    • Fossil evidence of early land plant reproductive structures is rare, limiting our knowledge of their life cycles.

    Purpose of the Study:

    • To describe and analyze the oldest known anatomically preserved and physiologically independent gametophytes.
    • To provide insights into the reproductive strategies of early land plants during the Lower Devonian period.

    Main Methods:

    • Detailed morphological analysis of fossil specimens from Scotland.
    • Comparative anatomical study of gametophyte structures, including game-tangiophores, antheridia, and archegonia.

    Main Results:

    Related Experiment Videos

    • Description of Lower Devonian gametophytes with upright, leafless axes.
    • Identification of terminally borne, bowl-shaped game-tangiophores.
    • Observation of stalked antheridia with multicellular walls and clustered archegonia on common bases.

    Conclusions:

    • These findings represent the oldest evidence of anatomically preserved and independent gametophytes.
    • The described structures offer significant insights into the reproductive morphology and evolution of early land plants.