Pflanzenreich Haeckel (1866) - plants
   Division Euthallophyta
     Subdivision Schizophyta
       Class Schizomycetes Nägeli (1857) see Class Schizomycetes Nägeli 1857 nom. inval.
         1 Family Coccaceae Eichler (1886), nom. inval.
         2 Family Bacteriaceae Cohn (1872)
         3 Family Spirillaceae Mig. (1894) see Family Spirillaceae Migula 1894 (Approved Lists 1980)
         4 Family Chlamydobacteriaceae Mig. (1894) see Family Chlamydobacteriaceae Migula 1894 nom. inval.
         5 Family Beggiatoaceae Mig. (1894) see Family Beggiatoaceae Migula 1894 (Approved Lists 1980)