Parka (plant)
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Parka decipiens Temporal range: Devonian |
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| Parka decipiens from Devonian of Scotland | |
| Scientific classification | |
| Kingdom: | Plantae |
| Division: | Charophyta |
| Class: | Charophyceae? |
| Order: | Coleochaetales? |
| Genus: | Parka |
| Species: | P. decipiens |
| Binomial name | |
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Parka decipiens Fleming, 1831 |
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Parka decipiens is a Devonian fossil believed to be an early land plant, and is the only species described in the genus Parka. It bears at least a passing resemblance to the alga Coleochaete, but the significance of this similarity is yet to be established.
The fossils of Parka decipiens seem small circular, elliptic or irregular patches reaching a diameter of 0.5–7.5 centimetres (0.20–2.95 in), with a reticulate structure showing small coaly discs. These discs contain a mass of what could be spores. Ultrastructural examination of these spores has shown that they lack the y-shaped trilete mark, a Y-like scar, that is characteristic of Silurian and Devonian pteridophytes.
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Wikipedia