kriegella kriegella kriegella is a gram-negative, aerobic and heterotrophic genus of bacteria from the family of flavobacteriaceae with one known species (kriegella aquimaris). kriegella is named after the american microbiologist noel r. krieg. kriegella scientific classification domain: bacteria phylum: bacteroidota class: flavobacteria order: flavobacteriales family: flavobacteriaceae genus: kriegellanedashkovskaya et al. 2008 type species kriegella aquimaris species k. aquimaris