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A1. NONMOTILE ALGAE WITHOUT CHLOROPLASTS:
CYANOBACTERIA
B1. VEGETATIVE CELLS USUALLY SOLITARY
C1. CELLS ATTACHED TO AQUATIC PLANTS (EPIPHYTIC)
C2. CELLS SOLITARY UNLESS DIVIDING; NOT EPIPHYTIC:
Cyanothece
C3. CELLS SOLITARY OR IN SMALL COLONIES; COLONIES USUALLY FORMED FROM 2-4 CELL SUBGROUPS:
Chroococcus
C4. THICK WALLED RESTING CELLS:
akinetes
B2. VEGETATIVE CELLS UNITED INTO COLONIES
B3. VEGETATIVE CELLS ALIGNED END-TO-END FORMING FILAMENTS OR PSEUDOFILAMENTS
A2. NONMOTILE ALGAE WITH CHLOROPLASTS
A3. MOTILE ALGAE WITH CHLOROPLASTS AND 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)
