thioalkalicoccus thioalkalicoccus thioalkalicoccus is a gram-negative, mesophilic and obligate alkaliphilic genus of bacteria from the family of chromatiaceae with one known species (thioalkalicoccus limnaeus). thioalkalicoccus limnaeus occurs in brackish water lakes. thioalkalicoccus scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: chromatiales family: chromatiaceae genus: thioalkalicoccusbryantseva et al. 2000 type species thioalkalicoccus limnaeus species t. limnaeus synonyms thialkalicoccus