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Sycidiales
| Sycidiales Temporal range:
| |
|---|---|
Scientific classification 
| |
| Clade: | Viridiplantae |
| (unranked): | Charophyta |
| Class: | Charophyceae |
| Order: | †Sycidiales |
| Families | |
|
See text. | |
Sycidiales is an order of fossil charophyte green algae.[1] The reproductive structures in Sycidales (and Trochiliscaceae, placed in Trochiliscales by AlgaeBase) have a calcified cover, called a utricle, that is thought to prevent the zygote being desiccated. Other Paleozoic families lack this cover, as do modern charophytes. Fossils of the family Sycidiaceae are found over the longest time span, from the Silurian to the Carboniferous.[2]
- ^ Guiry, M.D.; Guiry, G.M., "Sycidiales", AlgaeBase, World-wide electronic publication, National University of Ireland, Galway, retrieved 2022-02-20
- ^ Taylor, T.N.; Taylor, E.L. & Krings, M. (2009), Paleobotany, The Biology and Evolution of Fossil Plants (2nd ed.), Amsterdam; Boston: Academic Press, pp. 136–137, ISBN 978-0-12-373972-8
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