Chlorophyceae

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.

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The following orders are typically recognised:

• Dunaliellales
• Volvocales (e.g. Volvox, Chlamydomonas)
• Chlorococcales (e.g. Chlorella)
• 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)^[2]

• Volvocales
• Chlorococcales
• Chaetophoroales
• Oedogoniales

Ulvophyceae by Hoek, Mann and Jahns (1995)

• Codiolales
• Ulvales

References

1. ^ 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 on 2007-09-23.
2. ^ Hoek,C.van den, Mann, D.G. and Jahns, H.M. 1995. Algae An Introduction to Phycology. Cambridge University Press, Cambridge

See also

• Clade
• Cladistics