Can You Explain The Characteristic And Classification Of Class Phytomastigophora?

Characters:
1. Chromatophores with chlorophyll present r secondarily lost.
2. Nutrition mostly holophytic or plant like, by photosynthesis.
3. Flagella rarely more than two.
4. Reserve food starch or other amyloid substances.
5. Sexual reproduction generally takes place.
6. Mostly free living, freshwater or marine.

There are the following orders are present in this class:
Chrysomonadida:
1. Small, solitary or colonial, often amoeboid, with a thin pellicle.
2. Flagella one or two, yellow or brown, orange or colorless.
3. Mouth gullet or transverse grooves absent.
4. Stigma often present
Cryptomonadida:
1. Small, oval with a firm cuticle rarely amoeboid.
2. Flagella two and unequal in size.
3. Nutrition mostly holophtic, some times saprophytic.
4. Stigma often presents.
5. Reserve material starch, often also oil.

Euglenoidida
1. Large, slender, with a thick and stout pellicle.
2. Flagella one or two, with mastigonemes.
3. Chromatophores numerous with green color or colorless.
4. Stigma and a contractile vacuole present in front side.
Volocida Phytomonadida:
1. Small, solitary or colonial, some with rigid cellulose covering.
2. Flagella two or four, sometimes more.
3. Gullet or cytochrome absent.
4. Reserve material starch and oils.

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