rhodococcus opacus rhodococcus opacus rhodococcus opacus is a bacterium species in the genus rhodococcus. it is moderately chemolithotrophic. its genome has been sequenced. r. opacus possesses extensive catabolic pathways for both sugars and aromatics and can tolerate inhibitory compounds found in depolymerized biomass (e.g., phenolics and furfural) rhodococcus opacus scientific classification domain: bacteria phylum: actinomycetota class: actinomycetia order: mycobacteriales family: nocardiaceae genus: rhodococcus species: r. opacus binomial name rhodococcus opacusklatte et al. 1995