Polaromonas aquatica
Polaromonas cryoconiti
Polaromonas glacialis
Polaromonas vacuolata
Polaromonas hydrogenivorans
Polaromonas jejuensis
Polaromonas naphthalenivorans
(tree size 1)
Polaromonas eurypsychrophila
Polaromonas ginsengisoli