[3] They generally use chemotrophy when oxygen is present and switch to light-derived energy when otherwise.

This suborder uses chlorosomes, a specialized antenna complex, to pass light energy to the reaction center.

The named colors are not absolute, as growth conditions such as oxygen concentration will make a green FAP appear green, brown, or reddish-orange by inducing changes in pigment composition.

[2] The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN)[4] and National Center for Biotechnology Information (NCBI).

Ribeiella" "Kouleothrix" Chloroflexus Oscillochloris "Ca.