gemmobacter fontiphilus gemmobacter fontiphilus gemmobacter fontiphilus is a gram-negative, rod-shaped, non-spore-forming, facultatively anaerobic and non-motile bacterium from the genus of gemmobacter which has been isolated from a freshwater spring from taiwan. gemmobacter fontiphilus scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rhodobacterales family: rhodobacteraceae genus: gemmobacter species: g. fontiphilus binomial name gemmobacter fontiphiluschen et al. 2013 type strain bcrc 80082, js43, lmg 25376