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Transcript 
Kingdom Protista: Algae and
Heterotrophic Protists
Chapter 15
Heterotrophic Phyla
• Oomycota- water molds.
• Myxomycota- plasmodial slime molds.
• Dictyosteliomycota- cellular slime molds.
Oomycota- water molds
• Characteristics
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Unicellular, coenocytic and filamentous.
Saprophytic and parasitic.
Food reserve- glycogen.
Eukaryotic nucleus.
Zoospores- 1 tinsel and 1 whiplash.
Cell wall cellulose/cellulose-like.
• Habitat- marine, freshwater, terrestrial.
• 700 species.
• Examples- Saprolegnia and Phytophthora.
Phytophthora- sudden oak disease,
Ireland potato famine, crop destruction.
Myxomycota- plasmodial slime molds
• Characteristics
– Streaming protoplasm.
– Saprophytic and engulf
bacteria, yeast, fungal spores.
– Food reserve- glycogen.
– Eukaryotic nucleus.
– Gametes- 2 unequal, apical,
whiplash.
– No cell wall.
• Habitat- terrestrial.
• 700 species.
• Example- Physarum.
Dictyosteliomycota- cellular slime molds
• Characteristics
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–
–
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Amoeba-like cells that form slugs.
Engulf bacteria.
Food reserve- glycogen.
Eukaryotic nucleus.
Flagella- none.
Cell wall cellulose.
• Habitat- terrestrial.
• 50 species.
• Examples- Dictyostelium.
Dictyostelium- cellular slime mold
Dictyostelium
Photosynthetic Phyla (the algae)
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Myzozoa- dinoflagellates.
Euglenozoa- euglenoids.
Cryptophyta- cryptomonads.
Haptophyta- haptophytes.
Chlorophyta- green algae.
Rhodophyta- red algae.
Heterokontophyta- heterokont algae.
– Phaeophyceae- brown algae.
– Chrysophyceae- golden-brown algae.
– Bacillariophyceae- diatoms.
Myzozoa- dinoflagellates
• Characteristics
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–
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Unicellular, colonal.
Chlorophylls A and C, peridinin.
Food reserve- starch in cytoplasm.
Thylakoids in 3.
Mesokaryotic nucleus.
Flagella- 1 transverse and 1 longitudinal.
Cell wall with cellulose in thecal plates.
• Habitat- marine and freshwater.
• 4,000 species.
• Examples- Ceratium, Peridinium,
Dinophysis, Alexandrium, Pfiesteria.
Pfiesteria piscicida
Euglenozoa
Euglenozoa- euglenoids
• Characteristics
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–
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Unicellular.
Chlorophylls A and B, carotenoids.
Food reserve- paramylon in cytoplasm.
Thylakoids 2-3.
Mesokaryotic nucleus.
2 unequal flagella, long one with hairs.
No cell wall, proteinaceous pellicle.
Eyespot.
• Habitat- marine and freshwater; puddles,
ditches, ponds, streams, lakes, rivers.
• 1,000 species.
• Example- Euglena.
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