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FAMILIA |
Name |
Explanation |
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Comamonadaceae |
family of Betaproteobacteria(Gram-negative) |
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Leptothrix discophora |
- Sheathed filamentous bacterium
- Creates multicolor films
- Presumed chemoautotroph
- Found in iron-rich fresh water with sufficient organic matter
- Known for its iron, manganese, and arsenic removing properties
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Leptothrix ochracea |
Red foculate in the picture
- Sheathed filamentous bacterium
- Chemolithotrophic bacterium
- Occurs in iron-rich fresh water with only a low concentration of organic matter
- Deposits ferric hydroxide within its sheath
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Nostocaceae |
family of Cyanobacteria |
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Nostoc |
- Moniliform cyanobacterium (filaments in a gelatinous sheath)
- Photoautotrophic bacteria
- Known for its ability to fix nitrogen as all other Nostocaceae bacteria
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| Siderocapsaceae |
family of Proteobacteria (Gram-negative) |
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Siderocapsa treublii |
Earthy color on the picture
- Chemoorganoheterotrophic bacterium
- Iron-oxidizing bacterium
- Requires an organic substrate
- Iron oxide deposited as by-product
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| Thiotrichaceae |
family of Proteobacteria (Gram-negative) |
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Beggiatoa |
- Colorless, filamentous
- Creates a white film
- Chemolithoheterotroph
- Sulphur-oxidizing bacterium
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