Chlorophyceae
| Chlorophyceae | |
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| Scientific classification | |
| Domain: | |
| Kingdom: | |
| Division: | |
| Class: | Chlorophyceae Wille in Warming, 1884
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| Orders[1] | |
The Chlorophyceae are one of the classes of green algae, distinguished mainly on the basis of ultrastructural morphology. For example the chlorophycean CW clade, and chlorophycean DO clade, are defined by the arrangement of their flagella. Members of the CW clade have flagella that are displaced in a "clockwise" (CW, 1–7 o'clock) direction eg. Chlamydomonadales. Members of the DO clade have flagella that are "directly opposed" (DO, 12–6 o'clock) eg. Sphaeropleales.
They share many similarities with the higher plants, including the presence of asymmetrical flagellated cells, the breakdown of the nuclear envelope at mitosis, and the presence of phytochromes, flavonoids, and the chemical precursors to the cuticle.[2]
The following orders are typically recognised:
- Dunaliellales (e.g. Dunaliella)
- Volvocales (e.g. Volvox, Chlamydomonas)
- Chlorococcales (e.g. Chlorella, Nannochloris)
- Oedogoniales (e.g. Oedogonium)
- Sphaeropleales
- Chaetophorales
- Microsporales
- Tetrasporales (e.g. Tetraspora)
In older classifications, the term Chlorophyceae is sometimes used to apply to all the green algae except the Charales, and the internal division is considerably different.
The Orders of the Chlorophyceae as listed by: in Hoek, Mann and Jahns (1995)[3]
- Volvocales
- Chlorococcales
- Chaetophoroales
- Oedogoniales
Ulvophyceae by Hoek, Mann and Jahns (1995)
- Codiolales
- Ulvales
References
- ^ Guiry, M.D. & Guiry, G.M. (2007). "Class: Chlorophyceae taxonomy browser". AlgaeBase version 4.2 World-wide electronic publication, National University of Ireland, Galway. Retrieved 2007-09-23.
{{cite web}}: Italic or bold markup not allowed in:|publisher=(help)CS1 maint: multiple names: authors list (link) - ^ Raven, Evert and Eichhorn. The Biology of Plants 7th edition, pg. 335. W. H. Freeman and Company, New York, 2005.
- ^ Hoek,C.van den, Mann, D.G. and Jahns, H.M. 1995. Algae An Introduction to Phycology. Cambridge University Press, Cambridge
See also
Classification of Archaeplastida or Plantae s.l. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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