propioniciclava tarda propioniciclava tarda propioniciclava tarda is a gram-positive, non-spore-forming, facultatively anaerobic and non-motile bacterium from the genus propioniciclava which has been isolated from rice-straw in hokkaido, japan. propioniciclava tarda scientific classification domain: bacteria phylum: actinomycetota class: actinomycetia order: propionibacteriales family: propionibacteriaceae genus: propioniciclava species: p. tarda binomial name propioniciclava tardasugawara et al. 2011 type strain dsm 22130jcm 15804wr061