Haemophilus
piscium

Hafnia
alvei

Haloarcula
argentinensis - californiae - hispanica - japonica - marismortui - mukohataei - sinaiiensis - vallismortis

Halobacillus
halophilus

Halobacterium
salinarum - simoncinii - sp. - volcanii

Halococcus
acetoinfaciens - agglomeratus - dombrowskii - morrhuae - nondenitrificans - saccharolyticus - salifodinae - sp.

Haloferax
denitrificans - gibbonsii - lucentensis - mediterranei - volcanii

Halomonas
aquamarina - cupida - elongata - halmophila - halodenitrificans - halophila - magadiensis - marina - meridiana - pacifica - sp. - subglaciescola - variabilis - venusta

Halorubrum
distributum - lacusprofundi - saccharovorum - sodomense - trapanicum - vacuolatum

Haloterrigena
turkmenica

Halothiobacillus
neapolitanus

Helcococcus
kunzii - ovis

Herbaspirillum
seropedicae

Herbidospora
cretacea

Herpetosiphon
geysericola

Hydrogenophaga
pseudoflava - sp.

Hyphomicrobium
aestuarii - denitrificans - facile - indicum - sp. - variabile - zavarzinii

Hyphomonas
neptunium