Citrobacter amalonaticus
Citrobacter koseri
(tree size 1)
Citrobacter freundii
Citrobacter braakii
Citrobacter farmeri
Citrobacter gillenii
Citrobacter murliniae
Citrobacter sedlakii
Citrobacter werkmanii
Citrobacter youngae
Citrobacter rodentium
Citrobacter pasteurii
Citrobacter europaeus
Citrobacter portucalensis
Citrobacter diversus