Closteriopsis
| Closteriopsis | |
|---|---|
| |
| Closteriopsis longissima | |
Scientific classification 
| |
| Clade: | Viridiplantae |
| Division: | Chlorophyta |
| Class: | Trebouxiophyceae |
| Order: | Chlorellales |
| Family: | Chlorellaceae |
| Genus: | Closteriopsis Lemmermann, 1899 |
| Type species | |
| Closteriopsis longissima (Lemmermann) Lemmermann[1]
| |
| Species | |
Closteriopsis is a genus of green algae in the family Chlorellaceae.[2] It is planktonic in freshwater habitats, and is widespread.[1]
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
[edit]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.[1] 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.[1]
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.[1][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.[1]
References
[edit]- ^ a b c d e f Guiry, M.D.; Guiry, G.M. "Closteriopsis Lemmermann, 1899". AlgaeBase. University of Galway. Retrieved 2025-01-14.
- ^ See the NCBI webpage on Closteriopsis. Data extracted from the "NCBI taxonomy resources". National Center for Biotechnology Information. Retrieved 2007-03-19.
- ^ . doi:10.1017/S0967026201003304 (inactive 23 February 2025).
{{cite journal}}: Cite journal requires|journal=(help); Missing or empty|title=(help)CS1 maint: DOI inactive as of February 2025 (link) - ^ a b Stoyneva, M.P.; Gärtner, G.; Cocquyt, C.; Vyverman, V. (2005). "Closteriopsis petkovii - A new green algal species from Lake Tanganyika (Africa)". Phyton. 45 (1). Horn, Austria: 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. p. 508. ISBN 857656064X.
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