views updated

Chloroflexus (family Chloroflexaceae) A genus of filamentous, gliding bacteria. They are predominantly photo-organotrophic under anaerobic conditions in the presence of light, but chemo-organotrophic under aerobic conditions. Their colour is green in the absence of air, but orange in the presence of air. C. aurantiacus is found in hot springs, where it forms dull-green or orange mats.