[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Bacteria Woese et al. 1990
     Phylum "Proteobacteria" Garrity et al. 2005 see Superphylum Proteobacteria Craig et al. 2010
       Class Alphaproteobacteria Garrity et al. 2006
         Order Rhodobacterales Garrity et al. 2006
           Family Rhodobacteraceae Garrity et al. 2006
             Genus Maricaulis Abraham et al. 1999
               1 Maricaulis maris (Poindexter 1964) Abraham et al. 1999
               2 Maricaulis parjimensis Abraham et al. 2002
               3 Maricaulis salignorans Abraham et al. 2002
               4 Maricaulis virginensis Abraham et al. 2002
               5 Maricaulis washingtonensis Abraham et al. 2002