Museum Quality Fossil - Cooksonia - Silurian Oldest Land Plant With Sporangium
Item History & Price
| Reference Number: Avaluer:15649424 |
Amberabg
Museum quality fossil specimen. Rare oldest fossil land plant with sporangium.
Species: Cooksonia sp.
Upper Silurian (Ludlowian/Pridolian) of the Holy CrossMountains, Poland. Kielce region
Dimension: matrix 55x22mm, plant 13mm
The first fossil records of vascular plants, that is, land plants with tissues that carry food, appeared in the second half of the Silurian period. The earliest known representatives of this group are the Cooksonia (mostly... from the northern hemisphere) and Baragwanathia (from Australia). A primitive Silurian land plant with xylem and phloem but no differentiation in root, stem or leaf, was much-branched Psilophyton. This plant reproducied by spores and respired through stomata on every surface, and probably photosynthesizing in every tissue exposed to light.
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