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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
C2. CELLS WITH TWO EQUAL LENGTH FLAGELLA
C3. CELLS WITH TWO DISSIMILAR FLAGELLA
C4. CELLS WITH MORE THAN TWO FLAGELLA
D1. CELLS SPHERICAL OR OVAL WITH WHAT APPEARS TO BE 3 FLAGELLA (2 FLAGELLA AND A HAPTONEMA):
Chrysochromulina/Prymnesium
D2. CELLS SPHERICAL, OVAL, OR ELLIPTICAL, WITH 4 EQUAL FLAGELLA:
Carteria
D3. CELLS HEART-SHAPED AND FLATTENED, WITH 4 EQUAL FLAGELLA:
Tetraselmis
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)
