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Mucidosphaerium pulchellum

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(Redirected from Dictyosphaerium pulchellum) Species of algae

Mucidosphaerium pulchellum
Scientific classification Edit this classification
Clade: Viridiplantae
Division: Chlorophyta
Class: Trebouxiophyceae
Order: Chlorellales
Family: Chlorellaceae
Genus: Mucidosphaerium
Species: M. pulchellum
Binomial name
Mucidosphaerium pulchellum
(H.C.Wood) C.Bock, Proschold & Krienitz
Synonyms
  • Dictyosphaerium pulchellum H.C.Wood

Mucidosphaerium pulchellum, also known by its synonym Dictyosphaerium pulchellum, is a species of freshwater green algae, in the family Chlorellaceae.

Mucidosphaerium pulchellum is widespread, occuring in plankton of freshwater bodies. It appears to be the most common in temperate to subarctic climates. For example, it is present in many lakes in southern Chile and Argentina including Lanalhue, Quillén, Lácar, and Nahuel Huapi. In this last lake it is the dominant algae species in the winter halfyear. It has occasionally been found terrestrially, on soil.

Description

Mucidosphaerium pulchellum consists of colonies of cells up to 80 μm wide, with 16 to 32 (rarely 64) cells, or solitary cells. Young cells are obovoid to ellipsoidal or spindle-shaped, while older cells are spherical. The cells are attached on tetrachotomously branched (i.e. 4-branched) threads by their narrow ends. The chloroplast is basal and cup- or saucer-shaped, and contains a pyrenoid covered by two starch grains. Reproduction occurs by the formation of autospores (two to four per sporangium), which are released from a tear in the parental cell wall.

Taxonomy

Traditionally, Mucidosphaerium pulchellum was distinguished from similar species (e.g. Dictyosphaerium ehrenbergianum, Dictyosphaerium tetrachotomum—now Hindakia tetrachotoma) by morphological features, such as the cell size and shape, and attachment of the cell to its stalk. However, molecular phylogenetic studies have found that algae matching the morphology of Dictyosphaerium sensu lato may be genetically distinct and belong to different species or genera, which are more or less cryptic in nature.

References

  1. ^ Guiry, M.D.; Guiry, G.M. "Mucidosphaerium pulchellum (H.C.Wood) C.Bock, Proschold & Krienitz 2011". AlgaeBase. University of Galway. Retrieved 2025-01-22.
  2. Guiry, M.D.; Guiry, G.M. (2007). "Genus: Dictyosphaerium taxonomy browser". AlgaeBase version 4.2 World-wide electronic publication, National University of Ireland, Galway. Retrieved 2007-09-25.
  3. ^ Komárek, J.; Fott, B. (1983). Chlorophyceae (Grünalgen), Ordnung Chlorococcales. Das Phytoplankton des Süßwassers (in German). E. Schweizerbart'sche Verlagsbuchhandlung. p. 1044.
  4. Thomasson 1963, p. 72.
  5. Thomasson 1963, p. 74.
  6. Thomasson 1963, p. 75.
  7. Thomasson 1963, p. 81.
  8. Mikhailyuk, Tatiana; Holzinger, Andreas; Tsarenko, Petro; Glaser, Karin; Demchenko, Eduard; Karsten, Ulf (2020). "Dictyosphaerium -like morphotype in terrestrial algae: What is Xerochlorella (Trebouxiophyceae, Chlorophyta)?". Journal of Phycology. 56 (3): 671–686. doi:10.1111/jpy.12974. PMC 7317402. PMID 31994728.
  9. D. M. John; Brian A. Whitton; Alan J. Brook, eds. (2002). The freshwater algal flora of the British Isles: an identification guide to freshwater and terrestrial algae. Cambridge University Press. ISBN 978-0-521-77051-4.
  10. Bock, Christina; Pröschold, Thomas; Krienitz, Lothar (2011). "Updating the Genus Dictyosphaerium and Description of Mucidosphaerium gen. nov. (Trebouxiophyceae) Based on Morphological and Molecular Data". Journal of Phycology. 47 (3): 638–652. Bibcode:2011JPcgy..47..638B. doi:10.1111/j.1529-8817.2011.00989.x. PMID 27021993. S2CID 26144724.
  11. Krienitz, Lothar; Bock, Christina; Kotut, Kiplagat; Pröschold, Thomas (2012). "Genotypic diversity of Dictyosphaerium-morphospecies (Chlorellaceae, Trebouxiophyceae) in African inland waters, including the description of four new genera". Fottea. 12 (2): 231–253. doi:10.5507/fot.2012.017.
Thomasson, Kuno (1963). Araucanian Lakes: Plankton Studies in North Patagonia with Notes on Terrestrial Vegetation. Uppsala: Almqvist & Wiksell.
Taxon identifiers
Dictyosphaerium pulchellum
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