Alteromonadales
Encyclopedia
The Alteromonadales are an order of Proteobacteria
Proteobacteria
The Proteobacteria are a major group of bacteria. They include a wide variety of pathogens, such as Escherichia, Salmonella, Vibrio, Helicobacter, and many other notable genera....

. Although they have been treated as a single family, the Alteromonadaceae
Alteromonadaceae
The Alteromonadaceae are a family of Proteobacteria. They are now one of several families in the order Alteromonadales, including Alteromonas and its closest relatives....

, they were divided into eight by Ivanova et al. in 2004. The cells are straight or curved rods. They are motil by the use of a single flagellum
Flagellum
A flagellum is a tail-like projection that protrudes from the cell body of certain prokaryotic and eukaryotic cells, and plays the dual role of locomotion and sense organ, being sensitive to chemicals and temperatures outside the cell. There are some notable differences between prokaryotic and...

. Most of the species are marine.
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