| Hafniomonas | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Division: | Chlorophyta |
| Class: | Chlorophyceae |
| Order: | Chlamydomonadales |
| Family: | Dunaliellaceae |
| Genus: | Hafniomonas Ettl & Moestrup |
| Species | |
Hafniomonas is a genus of green algae in the family Dunaliellaceae. [1] It is found in freshwater. [2]
Hafniomonas is a unicellular, flagellate alga. Cells are elongate, ovoid, pyriform or cylindrical or globose-cordate; they are typically somewhat four-sided in cross section, with the anterior end bearing four longitudinal, rounded ridges. At the center of the anterior end emerge four flagella, sometimes with a small papilla. The cell contains a single nucleus, two contractile vacuoles, and one cup-shaped, parietal chloroplast and a distinct stigma and pyrenoid. The chloroplast may be perforate, separated into segments. [3]
Asexual reproduction occurs via cell division, and sometimes cells form cysts or palmelloid stages. Sexual reproduction is unknown. [3]
Hafniomonas consists of species that were formerly classified within Pyramimonas . Unlike Pyramimonas , Hafniomonas lacks cell walls and a covering of scales. [2] Hafniomonas has chloroplasts with are not markedly lobed, unlike Pyramimonas which has chloroplasts which are markedly lobed into four, eight or 12 lobes in the anterior. [4] Within Hafniomonas, species are distinguished based on the position of the pyrenoid, form of the chloroplast and stigma, and shape and size of cells. [3]
