Biology:Closteriopsis
Closteriopsis is a genus of green algae in the family Chlorellaceae.[1] It is planktonic in freshwater habitats, and is widespread.[2]
Closteriopsis is currently placed in the family Chlorellaceae, based on molecular data, although it is similar in morphology to Selenastraceae and was formerly placed there.[3]
Description
Closteriopsis is a unicellular organism. Cells are 10–240 μm long and 1–6.5 μm wide, and are very long and narrow, either straight or curved with usually pointed tips.[2] Most sources describe Closteriopsis as lacking a mucilaginous envelope, although it has been documented in one species.[4] Cells have smooth cell walls, a single nucleus and a central or parietal, ribbon-like chloroplast with multiple pyrenoids arranged in a series. Reproduction occurs asexually by the formation of two to eight autospores, which form in a series and are released through the rupture of the parental cell wall. Flagellated stages and sexual reproduction have not been observed in this genus.[2]
Closteriopsis is similar to other narrow, spindle-shaped organisms such as Keratococcus, Schroederia and Monoraphidium, and differs from them in having multiple pyrenoids per chloroplast.[2][4] It is also similar to some acicular species of Closterium (hence the name), from which it is distinguished by having only one chloroplast and reproducing by autospores.[5] Species are distinguished from each other based on chloroplast morphology and cell size and shape.[2]
References
- ↑ See the NCBI webpage on Closteriopsis. Data extracted from the "NCBI taxonomy resources". National Center for Biotechnology Information. https://ftp.ncbi.nih.gov/pub/taxonomy/.
- ↑ 2.0 2.1 2.2 2.3 2.4 Guiry, M.D.; Guiry, G.M. (2008). "Closteriopsis Lemmermann, 1899". AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org/browse/taxonomy/?id=43429.
- ↑ . doi:10.1017/S0967026201003304.
- ↑ 4.0 4.1 Stoyneva, M.P.; Gärtner, G.; Cocquyt, C.; Vyverman, V. (2005). "Closteriopsis petkovii - A new green algal species from Lake Tanganyika (Africa)". Phyton (Horn, Austria) 45 (1): 237–247.
- ↑ Bicudo, Carlos E. M.; Menezes, Mariângela (2006). Gêneros de Algas de Águas Continentais do Brasil: chave para identificação e descrições (2 ed.). RiMa Editora. pp. 508. ISBN 857656064X.
Wikidata ☰ Q5135460 entry
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