| Chaetopeltis | |
|---|---|
|   | |
| Chaetopeltis orbicularis | |
| Scientific classification   | |
| Kingdom: | Plantae | 
| Division: | Chlorophyta | 
| Class: | Chlorophyceae | 
| Order: | Chaetopeltidales | 
| Family: | Chaetopeltidaceae | 
| Genus: | Chaetopeltis Berthold | 
| Species: | C. orbicularis | 
| Binomial name | |
| Chaetopeltis orbicularis Berthold [1]  | |
Chaetopeltis is a genus of green algae in the order Chaetopeltidales, [2] containing a single species, Chaetopeltis orbicularis. [3] It is an epiphyte on aquatic plants and filamentous algae. It is a freshwater organism, [4] preferring flowing water; [3] it is generally common but often overlooked. [5]
Chaetopeltis is unicellular when young but later grows into a flattened, disc-shaped colony of cells up to 1 mm in diameter and one cell thick. The cells are 15–20 μm wide and 15–30 μm long, with rounded or angular by mutual compression; cells may have one or two long pseudocilia attached, oriented perpendicularly to the disc. The chloroplast is parietal and contains a pyrenoid. Cells contain [4]
Asexual reproduction occurs by the formation of two to eight zoospores, which are quadriflagellate; sexual reproduction has also been observed and it is isogamous. [4]
Chaetopeltis is usually similar in morphology to Coleochaete , but that genus lacks contractile vacuoles and has basally sheathed setae. [4] It is variable in morphology, and single-celled individuals have been described under different names, namely Oligochaetophora and Polychaetophora. [5]