Colacium
| Colacium | |
|---|---|
| |
| Colacium vesiculosum, attached to a rotifer | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Phylum: | Euglenozoa |
| Class: | Euglenida |
| Clade: | Euglenophyceae |
| Order: | Euglenales |
| Family: | Euglenaceae |
| Genus: | Colacium Ehrenberg, 1834 |
| Type species | |
| Colacium vesiculosum Ehrenberg[1]
| |
Colacium is a genus of algae belonging to the family Euglenaceae.[2] It has two phases: a motile phase and a sessile phase, where it is found attached to other freshwater organisms.[3]
The genus has a cosmopolitan distribution.[2]
Description
[edit]Colacium is a single-celled or colonial organisms. Cells are small, about 20–40 μm, and are similar to that of Euglena, and are metabolic with parietal, lobed chloroplasts each with a pyrenoid, and monomorphic, small paramylon grains. In its typical sessile phase, the cells are attached to a substrate via a mucilaginous stalk or short pillow. Cells divide to form colonies where the cells are attached by branched, dendroidal stalks.[4]
Cells of Colacium can grow a flagella and become motile, escaping from the colony as a free-swimming cell.[4]
Species:[2]
- Colacium arbuscula Stein, 1878
- Colacium mucronatum Bourr. & Chadef.
- Colacium sideropus Skuja
- Colacium simplex Hub.-Pest.
- Colacium steinii Kent
- Colacium vesiculosum Ehrenberg, 1838
References
[edit]- ^ Guiry, M.D.; Guiry, G.M. "Colacium Ehrenberg, 1834". AlgaeBase. University of Galway. Retrieved 28 April 2025.
- ^ a b c "Colacium Ehrenberg, 1834". www.gbif.org. Retrieved 17 April 2021.
- ^ Rosowski, James R.; Kugrens, Paul (1973). "Observations on the euglenoid Colacium with special reference to the formation and morphology of attachment material". Journal of Phycology. 9 (4): 370–383. doi:10.1111/j.1529-8817.1973.tb04110.x. S2CID 83651870.
- ^ a b 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.