The Chlorophyceae are one of the classes of green algae, distinguished manly on the basis of ultrastructural morphology. The following orders are typically recognised:

  • Dunaliellales
  • Chlamydomonadales (e.g. Chlamydomonas)
  • Volvocales (e.g. Volvox)
  • 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.