Thermoacidophiles: live in extreme acidic environments, high temp., low pH Deep sea hydrothermal vents Hot springs, geysers 1 Divided into MANY different phyla according to evolutionary relationships 4 generally recognized phyla are CYANOBACTERIA SPIROCHETES GRAM-POSITIVE PROTEOBACTERIA 2 Eubacteria come in three basic shapes: Bacilli (bacillus): rod-shaped Cocci (coccus): sphere-shaped Spirilla (spirillum): spiral-shaped 3 Cell forms: Diplo- pairs Strepto: chains Staphylo: grapelike clusters 4 Identify this