Biology:Dimorphococcus
| Dimorphococcus | |
|---|---|
| |
| Dimorphococcus lunatus | |
Scientific classification 
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| (unranked): | Viridiplantae |
| Division: | Chlorophyta |
| Class: | Chlorophyceae |
| Order: | Sphaeropleales |
| Family: | Scenedesmaceae |
| Genus: | Dimorphococcus Braun |
| Species | |
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Dimorphococcus is a genus of fresh water green algae in the family Scenedesmaceae.[1] It is found as a component of the phytoplankton of freshwater ponds, lakes, and peat bogs. It is widespread, but usually not very common.[2]
Dimorphococcus is usually found in small colonies of multiples of four cells, surrounded by a gelatinous mass. Groups of four cells are further attached to each other via mucilaginous strands, which are the remnants of the mother cell wall.[3] Cells are kidney-shaped to heart-shaped, 10–25 μm long and 3–8(–15) μm wide. Each cell is uninucleate (containing one nucleus) and has one parietal chloroplast each with one or more pyrenoids.[2]
Dimorphococcus reproduces asexually via autospores, with four spores produced per mother cell. Autospores are released through a lateral tear in the mother cell wall. After release, the empty cell wall gradually dissolves.[2]
Taxonomy
Currently, Dimorphococcus is placed in the family Scenedesmaceae, according to molecular phylogenetic analyses.[4]
One species, Dimorphococcus fritschii, is of uncertain status. The phycologist Chin Chih Jao considered it to have a different structure than other species of Dimorphococcus; accordingly, he placed it into a new genus, Dimorphococcopsis. The species has not been re-investigated and it is possible that the original placement was correct.[5]
References
- ↑ See the NCBI webpage on Dimorphococcus. Data extracted from the "NCBI taxonomy resources". National Center for Biotechnology Information. http://ftp.ncbi.nih.gov/pub/taxonomy/. Retrieved 2007-03-19.
- ↑ 2.0 2.1 2.2 Guiry, M.D.; Guiry, G.M. (2008). "Dimorphococcus". AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org/browse/taxonomy/?id=43504.
- ↑ Matthews, Robin A. (2016). "Freshwater Algae in Northwest Washington, Volume II, Chlorophyta and Rhodophyta". A Collection of Open Access Books and Monographs (Western Washington University). doi:10.25710/fctx-n773. https://cedar.wwu.edu/cedarbooks/1/.
- ↑ Hegewald, Eberhard; Wolf, Matthias; Keller, Alexander; Friedl, Thomas; Krienitz, Lothar (2010). "ITS2 sequence-structure phylogeny in the Scenedesmaceae with special reference to Coelastrum (Chlorophyta, Chlorophyceae), including the new genera Comasiella and Pectinodesmus". Phycologia 49 (4): 325–335. doi:10.2216/09-61.1. Bibcode: 2010Phyco..49..325H.
- ↑ Komárek, J.; Fott, B. (1983) (in German). Chlorophyceae (Grünalgen), Ordnung Chlorococcales. Das Phytoplankton des Süßwassers. E. Schweizerbart'sche Verlagsbuchhandlung. pp. 1044.
External links
Wikidata ☰ Q5277753 entry
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