Discoplastis
| Discoplastis | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Phylum: | Euglenozoa |
| Class: | Euglenida |
| Clade: | Euglenophyceae |
| Order: | Euglenales |
| Family: | Phacaceae |
| Genus: | Discoplastis R.E.Triemer, 2006 |
| Type species | |
| Discoplastis spathirhyncha (Skuja) Triemer[1]
| |
| Species | |
| |
Discoplastis is a genus of euglenoid algae belonging to the family Phacaceae.[2] The species of this genus are found in Europe, Northern America, Southeastern Asia and Australia.[2]
Discoplastis consists of solitary, free-living cells with one emergent flagellum. The cells have a flexible, spirally striated pellicle and are therefore capable of metaboly. When swimming, the cells are a variety of different but characteristic shapes (cylindrical, fusiform, hourglass-shaped, etc.). The posterior of the cell ends in a pointed, colorless cell. Within each cell there are numerous small, discoid chloroplast lacking pyrenoids. Cells have paramylon grains; the paramylon grains may be monomorphic (all small) or dimorphic (some large, some small).[3] As with other euglenoids, the cell has a reddish eyespot (stigma).[4]
Discoplastis can be distingished by to the combination of small, discoid parietal chloroplasts without pyrenoids (a synapomorphy for the family Phacaceae), and its flexibility.[5] The similar genus Flexiglena is even more flexible, displaying metabolic movement even when swimming. It is also distinguished by having a large paramylon grain directly adjacent to the stigma.[3]
Molecular phylogenetics suggest the following relationships between species:[3]
References
[edit]- ^ a b Guiry, M.D.; Guiry, G.M. "Discoplastis Triemer, 2006". AlgaeBase. University of Galway. Retrieved 2025-05-04.
- ^ a b "Discoplastis R.E.Triemer, 2006". www.gbif.org. Retrieved 10 May 2021.
- ^ a b c Łukomska-Kowalczyk, Maja; Chaber, Katarzyna; Fells, Alicja; Milanowski, Rafał; Zakryś, Bożena; De Clerck, O. (2021). "Description of Flexiglena gen. nov. and new members of Discoplastis and Euglenaformis (Euglenida)". Journal of Phycology. 57 (3): 766–779. Bibcode:2021JPcgy..57..766L. doi:10.1111/jpy.13107. PMC 8248102. PMID 33205421.
- ^ Triemer, Richard E.; Zakryś, Bożena (2014). "Chapter 10. Photosynthetic Euglenoids". 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.
- ^ Kim, Jong Im; Shin, Woongghi; Triemer, Richard E. (2010). "Multigene analyses of photosynthetic euglenoids and new family, Phacaceae (Euglenales)". Journal of Phycology. 46 (6): 1278–1287. Bibcode:2010JPcgy..46.1278K. doi:10.1111/j.1529-8817.2010.00910.x.
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