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A1. NONMOTILE ALGAE WITHOUT CHLOROPLASTS:
CYANOBACTERIA
A2. NONMOTILE ALGAE WITH CHLOROPLASTS
A3. MOTILE ALGAE WITH CHLOROPLASTS AND FLAGELLA
B1. MOTILE COLONIES WITH TWO OR MORE CELLS
B2. MOTILE SINGLE-CELL ALGAE
C1. CELLS WITH ONE VISIBLE FLAGELLUM
D1. CELLS COVERED WITH SCALES (SCALED CHRYSOPHYTES); MOST SPECIES ALSO HAVE LONG SPINES:
Mallomonas
D2. CELLS ENCLOSED IN A RIGID LORICA
D3. CELLS NOT COVERED WITH SCALES OR ENCLOSED IN A LORICA; MAY BE RIGID OR FLEXIBLE
C2. CELLS WITH TWO EQUAL LENGTH FLAGELLA
C3. CELLS WITH TWO DISSIMILAR FLAGELLA
C4. CELLS WITH MORE THAN TWO FLAGELLA
A4. CELLS DIVIDED INTO MIRROR-IMAGE SEMI-CELLS:
Desmids
(see key at
cedar.wwu.edu/cedarbooks/14/
)
A5. CELLS ENCLOSED IN GLASSY, ORNAMENTAL FRUSTULES:
Diatoms
(see key at
diatoms.org)
