coprobacter secundus coprobacter secundus coprobacter secundus is a gram-negative, obligately anaerobic, rod-shaped and non-spore-forming bacterium from the genus of coprobacter which has been isolated from human faeces. coprobacter secundus scientific classification domain: bacteria phylum: bacteroidota class: bacteroidia order: bacteroidales family: barnesiellaceae genus: coprobacter species: c. secundus binomial name coprobacter secundusshkoporov et al. 2015 type strain dsm 28864, vkm b-2857, strain 177