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1 results

  • A new vascular plant from the Lower Devonian Windyfield chert, Rhynie, NE Scotland

  • Clare L. Powell, Dianne Edwards, Nigel H. Trewin
  • Journal:
    Transactions of the Royal Society of Edinburgh: Earth Sciences / Volume 90 / Issue 4 / 1999
    Published online by Cambridge University Press:
    03 November 2011, pp. 331-349
    Print publication:
    1999

  • Two plants are described from fragmentary remains preserved in the Windyfield chert, situated c. 600 m from the classic Rhynie chert locality. Both are sometimes coated by a microbial film. The larger, fertile axes are placed in the new genus and species Ventarura lyonii. They possess a distinctive, sclerenchymatous middle cortex and terete xylem, and marginally dehiscent, lateral sporangia. The new taxon is similar to the Rhynie zosterophyll Trichopherophyton teuchansii, but is placed in a new genus on sporangial differences. Associated smaller axes with unicellular epidermal outgrowths lack the middle cortex of the larger axes and often have medullated protosteles. They are interpreted as subterranean rhizomes and probably belong to the new fertile taxon, but organic continuity between the two has not been demonstrated.