thermaerobacter thermaerobacter the thermaerobacter are an unassigned genus of bacteria placed within the class clostridia. originally placed within the highly polyphyletic class clostridia, order clostridiales, according to the ncbi and lpsn, it is now thought to lie outside of the bacillota. thermaerobacter scientific classification domain: bacteria phylum: bacillota class: clostridia order: "thermaerobacterales" family: "thermaerobacteraceae" genus: thermaerobactertakai, inoue & horikoshi 1999 type species thermaerobacter marianensistakai, inoue & horikoshi 1999 species t. composti t. litoralis t. marianensis t. nagasakiensis t. subterraneus phylogeny the currently accepted taxonomy is based on the list of prokaryotic names with standing in nomenclature (lpsn) and national center for biotechnology information (ncbi) 16s rrna based ltp_01_2022 120 marker proteins based gtdb 07-rs207 t. marianensis takai, inoue & horikoshi 1999 t. composti yabe et al. 2010 t. litoralis tanaka et al. 2006 t. nagasakiensis nunoura et al. 2002 t. subterraneus spanevello et al. 2002 t. marianensis t. subterraneus