Sycidiales

Sycidiales; Temporal range: Silurian–Carboniferous PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
(unranked):	Viridiplantae
(unranked):	Charophyta
Class:	Charophyceae
Order:	† Sycidiales
Families
	See text.

Last updated August 01, 2024

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]

Families and genera

As of February 2022^[update], AlgaeBase accepted the following families^[1] and genera.^[3]^[4]

†Chovanellaceae
- † Chovanella Reitlinger & Yartseva – 1 species
†Sycidiaceae Karpinsky
- † Calcisphaera Williamson – 4 species
- † Gemmichara Zhen Wang – 1 species
- † Maslovella Samojlova – 1 species
- † Sycidium G.Sandberger – 12 species

Related Research Articles

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<span class="mw-page-title-main">Charales</span> Order of green algae in the division Charophyta

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Sykidion is a genus of green algae. Pseudoneochloris is a synonym of this genus. As of March 2022, Sykidion was the only genus in the family Sykidiacaeae, which was the only family in the order Sykidiales.

<i>Chlorokybus</i> Genus of basal green algae

Chlorokybus is a multicellular (sarcinoid) genus of basal green algae or charophyte. It has been classified as the sole member of the family Chlorokybaceae, which is the sole member of the order Chlorokybales, in turn the sole member of the class Chlorokybophyceae. It grows on soil and rock surfaces, and is rare.

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References

1 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
↑ Guiry, M.D.; Guiry, G.M., "Chovanellaceae", AlgaeBase , World-wide electronic publication, National University of Ireland, Galway, retrieved 2022-02-20
↑ Guiry, M.D.; Guiry, G.M., "Sycidiaceae", AlgaeBase , World-wide electronic publication, National University of Ireland, Galway, retrieved 2022-02-20

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[AB_t179954-1] 1 2 Guiry, M.D.; Guiry, G.M., "Sycidiales", AlgaeBase , World-wide electronic publication, National University of Ireland, Galway, retrieved 2022-02-20

[TaylTaylKrin09-2] 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

[3] Guiry, M.D.; Guiry, G.M., "Chovanellaceae", AlgaeBase , World-wide electronic publication, National University of Ireland, Galway, retrieved 2022-02-20

[4] Guiry, M.D.; Guiry, G.M., "Sycidiaceae", AlgaeBase , World-wide electronic publication, National University of Ireland, Galway, retrieved 2022-02-20

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