[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Bacteria Woese et al. 1990
     Phylum Firmicutes corrig. Gibbons and Murray 1978 (Approved Lists 1980)
       Class "Clostridia" Garrity et al. 2001 nom. ined. see Class Clostridia Rainey 2010
         Order Clostridiales Prévot 1953 (Approved Lists 1980)
           Family Syntrophomonadaceae Zhao et al. 1993
             Genus Anaerobranca Engle et al. 1995
               1 Anaerobranca horikoshii Engle et al. 1995
               2 Anaerobranca californiensis Gorlenko et al. 2004
               3 Anaerobranca gottschalkii Prowe and Antranikian 2001