gemmobacter lanyuensis gemmobacter lanyuensis gemmobacter lanyuensis is a gram-negative, facultatively anaerobic bacterium from the genus of gemmobacter which has been isolated from a freshwater spring from taiwan. gemmobacter lanyuensis scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rhodobacterales family: rhodobacteraceae genus: gemmobacter species: g. lanyuensis binomial name gemmobacter lanyuensissheu et al. 2013 type strain bcrc 80378, kctc 23714, lmg 26667, orc-4