Hydrogenophaga flava
P. flava
Hydrogenophaga bisanensis
Hydrogenophaga taeniospiralis
P. taeniospiralis
Hydrogenophaga palleronii
P. palleronii
Hydrogenophaga defluvii
Hydrogenophaga pseudoflava
P. pseudoflava
Hydrogenophaga atypica
Hydrogenophaga caeni
Hydrogenophaga intermedia
Hydrogenophaga luteola
Hydrogenophaga soli
Hydrogenophaga aquatica
Hydrogenophaga crassostreae
Hydrogenophaga laconesensis