chloroflexota chloroflexota the chloroflexota are a phylum of bacteria containing isolates with a diversity of phenotypes, including members that are aerobic thermophiles, which use oxygen and grow well in high temperatures; anoxygenic phototrophs, which use light for photosynthesis (green non-sulfur bacteria); and anaerobic halorespirers, which uses halogenated organics (such as the toxic chlorinated ethenes and polychlorinated biphenyls) as electron acceptors. chloroflexota scientific classification domain: bacteria clade: terrabacteria phylum: chloroflexotagarrity and holt 2021 classes anaerolineae ardenticatenia bathosphaeria caldilineae chloroflexia dehalococcoidia ktedonobacteria limnocylindria tepidiformia thermoflexia "thermomicrobiia" umbricyclopia synonyms "chlorobacteria" cavalier-smith 2006 "chloroflexi" garrity and holt 2001 "eobacteria" cavalier-smith 2002 "chloroflexota" whitman et al. 2018 "chloroflexaeota" oren et al. 2015 thermomicrobiota oren & garrity 2021 the members of the phylum chloroflexota are monoderms (that is, have one cell membrane with no outer membrane), but they stain mostly gram-negative. many well-studied phyla of bacteria are diderms and stain gram-negative, whereas well-known monoderms that stain gram-positive include firmicutes (or bacillota) (low g+c gram-positives), actinomycetota (high-g+c gram-positives) and deinococcota (gram-positive diderms with thick peptidoglycan). history