Chlorangiella

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Chlorangiella
Chlorangiella pygmaea as Chlorangium stentorinum in Stein 1878.jpg
Chlorangiella pygmaea
Scientific classification OOjs UI icon edit-ltr.svg
Clade: Viridiplantae
Division: Chlorophyta
Class: Chlorophyceae
Order: Chlamydomonadales
Family: Chlorangiellaceae
Genus: Chlorangiella
De Toni [1]
Type species
Chlorangiella pygmaea
(Ehrenberg) P.C.Silva [1]
Species [1]

Chlorangiella is a genus of microscopic green algae, the type genus of the family Chlorangiellaceae. [1] The name Chlorangiella was coined by Giovanni Battista de Toni in 1889. [1] It is a nomen novum for Chlorangium F.Stein. [1]

Species of Chlorangiella are attached via stalks to freshwater algae, crustaceans, rotifers, or insect larvae. [2] They can attach to the substrate, such as the copepod Cyclops , in such large quantities as to make them appear green. [3] They have been recorded from many continents, mostly in temperate habitats. [1]

Description

Chlorangiella consists of single cells or groups of cells, where the cells are borne on the ends of mucilaginous stalks. Stalks may be branched or unbranched and up to 5 times the lengths of the cells. The cells themselves are ovoid, 5–42 μm long. They contain a single cell nucleus (i.e. are uninucleate) and contractile vacuoles at their apices. Chloroplasts are one to several, parietal, and band-shaped, with or without a pyrenoid. [1]

Asexual reproduction occurs by the formation of zoospores. The zoospores may be released at the apex of the sporangium, and swim until they settle and develop into a new organism; alternatively, they may attach at the base of the sporangium and develop a stalk. Sexual reproduction has not been observed in this genus. [1]

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References

  1. 1 2 3 4 5 6 7 8 9 Guiry, M.D.; Guiry, G.M. "Chlorangiella". AlgaeBase . World-wide electronic publication, National University of Ireland, Galway. Retrieved 23 December 2023.
  2. ↑ Shubert, Elliot; Gärtner, Georg (2014). "Chapter 7. Nonmotile Coccoid and Colonial Green Algae". In Wehr, John D.; Sheath, Robert G.; Kociolek, J. Patrick (eds.). Freshwater Algae of North America: Ecology and Classification (2 ed.). Elsevier Inc. ISBN   978-0-12-385876-4.
  3. ↑ Péterfi, Leontin Stefan; Momeu, Laura (1987). "Observations on the ultrastructural cytology of Chlorangiella subarctica (Skuja) Fott (Tetrasporales, Chlorophyceae)". Archiv für Protistenkunde. 134: 125–135. doi:10.1016/S0003-9365(87)80032-5.


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