Cyanobacteria: Cyanobacteria, also known as blue-green algae, are photosynthetic. These species include Anabaena.
Chlamydia species: The elementary body is formed by Chlamydias as a part of their reproductive cycle. This form is required for infection, and because of its environmental stability, is sometimes compared to endospores.
Distinction between bacteria in the genus Streptococcus and that of Staphylococcus: The basic distinction between bacteria in the genus Streptococcus and that of Staphylococcus is the presence or absence of catalase activity. The catalase test is an important distinction between streptococci (catalase negative) and staphylococci (catalase positive).
Family Enterobacteriaciae: Members of the family Enterobacteriaciae are gram negative bacilli, do not form endospores, do not possess cytochrome oxidase c, are facultative anaerobes, and also able to reduce nitrate.