carboxydothermus pertinax carboxydothermus pertinax carboxydothermus pertinax is a thermophilic and anaerobic bacterium from the genus of carboxydothermus which has been isolated from a hot spring on the kyushu island in japan. carboxydothermus pertinax scientific classification domain: bacteria phylum: bacillota class: clostridia order: clostridiales family: peptococcaceae genus: carboxydothermus species: c. pertinax binomial name carboxydothermus pertinaxyoneda et al. 2012 type strain dsm 23698, nbrc 107576, ug1