Hafniomonas
| Hafniomonas | |
|---|---|
Scientific classification 
| |
| Clade: | Viridiplantae |
| 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]
References
[edit]- ^ See the NCBI webpage on Hafniomonas. Data extracted from the "NCBI taxonomy resources". National Center for Biotechnology Information. Retrieved 2007-03-19.
- ^ a b Nakada, Takashi; Suda, Shoichiro; Nozaki, Hisayoshi (2007). "A taxonomic study of Hafniomonas (Chlorophyceae) based on a comparative examination of cultured material". Journal of Phycology. 43 (2): 397–411. Bibcode:2007JPcgy..43..397N. doi:10.1111/j.1529-8817.2007.00328.x.
- ^ a b c Guiry, M.D.; Guiry, G.M. "Hafniomonas Ettl & Moestrup, 1980". AlgaeBase. University of Galway. Retrieved 2025-03-19.
- ^ Nakada, Takashi; Nozaki, Hisayoshi (2014). "Chapter 6. Flagellate Green Algae". In Wehr, John D.; Sheath, Robert G.; Kociolek, J. Patrick (eds.). Freshwater Algae of North America: Ecology and Classification (2 ed.). Elsevier Inc. pp. 265–313. ISBN 978-0-12-385876-4.
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