pelomonas puraquae pelomonas puraquae pelomonas puraquae is a gram-negative, rod-shaped, non-spore-forming bacterium from the genus pelomonas in the family comamonadaceae. colonies of p. puraquae are pale brown, with darker centers. it was first isolated from haemodialysis water in mallorca, spain. the species name is derived from latin purus (pure) and aqua (water). pelomonas puraquae scientific classification domain: bacteria phylum: pseudomonadota class: betaproteobacteria order: burkholderiales family: comamonadaceae genus: pelomonas species: p. puraquae binomial name pelomonas puraquaegomila et al. 2007 type strain ccug 52769, cect 7234, strain ps10