Deinococcus–Thermus

Deinococcus–Thermus is a phylum of bacteria that are highly resistant to environmental hazards.

There are two main groups.

Though these two groups evolved from a common ancestor, the two mechanisms of resistance appear to be largely independent.

These bacteria have thick cell walls that give them gram-positive stains, but they include a second membrane and so are closer in structure to those of gram-negative bacteria.