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Seed from the upper devonian.

J M Pettitt, C B Beck

    Science (New York, N.Y.)
    |June 30, 1967
    PubMed
    Summary
    This summary is machine-generated.

    Fossil evidence reveals the existence of seeds in the Upper Devonian period. This finding pushes back the origin of seed plants significantly, extending their known age from the Lower Carboniferous into the Upper Devonian.

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    Area of Science:

    • Paleobotany
    • Evolutionary Biology
    • Stratigraphy

    Background:

    • The earliest evidence for seed plants was previously dated to the Lower Carboniferous (Mississippian) period.
    • The evolutionary history and diversification of early vascular plants are key areas of research.

    Purpose of the Study:

    • To present new fossil evidence for the existence of seeds.
    • To re-evaluate the timeline of seed plant evolution.

    Main Methods:

    • Geological fieldwork and fossil collection in Upper Devonian strata.
    • Paleobotanical analysis and identification of seed structures.

    Main Results:

    • Discovery of definitive seed structures within Upper Devonian rock formations.

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  • Evidence indicates seed-bearing plants were present earlier than previously established.

    • Conclusions:

    • The origin of seed plants is now extended into the Upper Devonian.
    • This discovery necessitates a revision of early plant evolution and paleobiogeography.