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Progymnosperm

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Progymnosperm

Progymnosperm
Temporal range: Middle Devonian–Mississippian
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Archaeopteris fossil leaves
Scientific classification
Kingdom: Plantae
Division: Tracheophyta
Class: Progymnospermopsida
Orders

The progymnosperms are an extinct group of woody, spore-bearing plants that is presumed to have evolved from the [3] and eventually during Late Devonian times the anuerophytaleans are presumed to have given rise to the pteridosperm order, the Lyginopteridales. In Late Devonian times, another group of progymnosperms gave rise to the first really large trees known as Archaeopteris.

Other characteristics:

References

  1. ^ Stewart, W.N.; Rothwell, G.W. (1993). Paleobiology and the evolution of plants. Cambridge University Press. p. 521pp. 
  2. ^ Lang, W. H. (1925). "Contributions to the study of the Old Red Sandstone flora of Scotland. I. On plant-remains from the fish-beds of Cromarty. II. On a sporangium-bearing branch-system from the Stromness Beds." Transactions of the Royal Society of Edinburgh, 54: 253-279.
  3. ^ Serlin, B. S. & Banks, H. P. (1978). "Morphology and anatomy of Aneurophyton, a progymnosperm from the Late Devonian of New York. Palaeontographica Americana, 8: 343-359.

External links

  • Progymnospermophyta
  • Botany: an introduction to plant biology
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