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##Emended description of the genus _Porphyrobacter_ Fuerst et al 1993  The description is identical to that given by \cite{8427804} with the following amendment (S?). amendments.  Most species synthesize BChl _a_ on low-nutrient media under aerobic and semiaerobic conditions. DNA base composition is 63.8 to 67.3 mol% G+C.