ZOOLOGICAL CLASSIFICATION OF THE CLASS 

 PH YTOM ASTIGODA ( PLANT-FLAGELLATES ) 



Abridged from Biology of the Protozoa by the Author 



Chlorophyll is present in all, and may be green, yellow, brown, or red 

 in color. 



Order 1. Chrysomonadida. Gullet-like region absent; cells not flat- 

 tened. Chlorophyll yellow. 



Sub-order 1. Euchrysomonadina. Motile state dominant. 



Sub-order 2. Rhizochrysidina. No flagella; rhizopodia forms. 



Sub-order 3. Chrysocapsina. Palmella state dominant. 



Order 2. Cryptomonadida. Gullet present; cells usually flattened. 

 Chlorophyll yellow or brown. 



Sub-order 1. Eucryptomonadina. Anterior end obliquely truncated. 

 Motile. 



Sub-order 2. Pheocapsina. Palmella state dominant. 



Order 3. Dinoflagellida. One free, one encircling flagellum. Cellu- 

 lose walls; chlorophyll, if present, usually brown. 



Sub-order 1. Diniferina. Body naked or shell-bearing; latter often 

 complex. 



Sub-order 2. Adinina. Naked or with bivalve shell; no transverse 

 furrow. 



Sub-order 3. Cystoflagellina. Naked; no groove or furrow; no 

 transverse flagellum. 



Order 4. Phytomonadida. Cellulose walls; no gullet; contractile 

 vacuole simple. These are the grass-green flagellates with true 

 starch. 



Order 5. Euglenida. Green flagellates; paramylum instead of starch; 

 complex contractile vacuole.* 



Order 6. Chloromonadida. Green; complex vacuole, metabolic prod- 

 ucts oil. 



* See "The Plant World," page 14, in this Series. 



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