Appendix E  Classification

DOMAIN BACTERIA: Kingdom Eubacteria

Single-celled prokaryotic organisms; most have peptidoglycan cell walls. Sometimes form colonies of clumps or filaments.

The Eubacteria include the blue-green bacteria (cyanobacteria such as Anabaena), chemoautotrophs (Nitrobacter), spirochetes (Treponema), prochlorobacteria (Prochloron), spore-forming bacteria (Bacillus), and obligate internal parasites, such as the rickettsiae (Rickettsia).