caldanaerobius zeae caldanaerobius zeae caldanaerobius zeae is a gram-positive thermophilic, anaerobic, non-spore-forming bacterium from the genus of caldanaerobius which has been isolated from organic waste leachate in hoopeston in the united states. caldanaerobius zeae scientific classification domain: bacteria phylum: bacillota class: clostridia order: thermoanaerobacterales family: thermoanaerobacteraceae genus: caldanaerobius species: c. zeae binomial name caldanaerobius zeae(cann et al. 2001) lee et al. 2008 type strain atcc baa-16, dsm 13642, mel2 synonyms thermoanaerobacterium zeae