| Spezies | Risiko- gruppe | Bemer- kungen | Status |
| Fabibacter | |||
| Fabibacter halotolerans | 1 | ||
| Fabibacter misakiensis | 1 | neu | |
| Fabibacter pacificus | 1 | ||
| Fabivirga | |||
| Fabivirga thermotolerans | 1 | neu | |
| Facklamia | |||
| Facklamia hominis | 2 | ||
| Facklamia ignava | 2 | ||
| Facklamia languida | 2 | ||
| Facklamia miroungae | 1 | neu | |
| Facklamia sourekii | 1 | + | |
| Facklamia tabacinasalis | 1 | ||
| Faecalibacterium | |||
| Faecalibacterium prausnitzii (Fusobacterium prausnitzii) | 1 | Einst. | |
| Faecalibaculum | |||
| Faecalibaculum rodentium | 1 | neu | |
| Faecalicatena | |||
| Faecalicatena contorta (Eubacterium contortum) | 2 | Umb. | |
| Faecalicatena fissicatena (Eubacterium fissicatena) | 1 | Umb. | |
| Faecalicatena orotica (Clostridium oroticum) | 2 | Umb. | |
| Faecalicoccus | |||
| Faecalicoccus acidiformans | 1 | neu | |
| Faecalicoccus pleomorphus (Streptococcus pleomorphus) | 1 | Umb. | |
| Faecalimonas | |||
| Faecalimonas umbilicata | 1 | neu | |
| Faecalitalea | |||
| Faecalitalea cylindroides (Eubacterium cylindroides) | 1 | Umb. | |
| Faenia → Saccharopolyspora | |||
| Faenia rectivirgula → Saccharopolyspora rectivirgula | |||
| Falcatimonas | |||
| Falcatimonas natans | 1 | neu | |
| Falcivibrio | |||
| Falcivibrio grandis | 2 | ||
| Falcivibrio vaginalis | 2 | ||
| Falsibacillus | |||
| Falsibacillus pallidus | 1 | ||
| Falsiporphyromonas | |||
| Falsiporphyromonas endometrii | 1 | t+ | |
| Falsirhodobacter | |||
| Falsirhodobacter deserti | 1 | neu | |
| Falsirhodobacter halotolerans | 1 | ||
| Falsochrobactrum | |||
| Falsochrobactrum ovis | 1 | ||
| Fangia | |||
| Fangia hongkongensis | 1 | ||
| Fastidiosibacter | |||
| Fastidiosibacter lacustris | 1 | neu | |
| Fastidiosipila | |||
| Fastidiosipila sanguinis | 1 | + | Einst. |
| Fermentibacillus | |||
| Fermentibacillus polygoni | 1 | neu | |
| Fermentimonas | |||
| Fermentimonas caenicola | 1 | neu | |
| Ferribacterium | |||
| Ferribacterium limneticum | 1 | ||
| Ferrimicrobium | |||
| Ferrimicrobium acidiphilum | 1 | ||
| Ferrimonas | |||
| Ferrimonas balearica | 1 | ||
| Ferrimonas futtsuensis | 1 | ||
| Ferrimonas gelatinilytica | 1 | ||
| Ferrimonas kyonanensis | 1 | ||
| Ferrimonas marina | 1 | ||
| Ferrimonas pelagia | 1 | ||
| Ferrimonas sediminum | 1 | ||
| Ferrimonas senticii | 1 | ||
| Ferriphaselus | |||
| Ferriphaselus amnicola | 1 | ||
| Ferrithrix | |||
| Ferrithrix thermotolerans | 1 | ||
| Ferroglobus | |||
| Ferroglobus placidus | 1 | ||
| Ferroplasma | |||
| Ferroplasma acidiphilum | 1 | ||
| Ferroplasma cupricumulans → Acidiplasma cupricumulans | |||
| Ferrovibrio | |||
| Ferrovibrio denitrificans | 1 | ||
| Ferrovibrio soli | 1 | neu | |
| Ferrovibrio xuzhouensis | 1 | neu | |
| Ferruginibacter | |||
| Ferruginibacter alkalilentus | 1 | ||
| Ferruginibacter lapsinanis | 1 | ||
| Ferruginibacter paludis | 1 | neu | |
| Ferruginibacter yonginensis | 1 | ||
| Fervidicella | |||
| Fervidicella metallireducens | 1 | ||
| Fervidicoccus | |||
| Fervidicoccus fontis | 1 | ||
| Fervidicola | |||
| Fervidicola ferrireducens | 1 | ||
| Fervidobacterium | |||
| Fervidobacterium changbaicum | 1 | ||
| Fervidobacterium gondwanense | 1 | ||
| Fervidobacterium islandicum | 1 | ||
| Fervidobacterium nodosum | 1 | ||
| Fervidobacterium pennivorans | 1 | ||
| Fervidobacterium riparium | 1 | ||
| Fervidobacterium thailandense | 1 | neu | |
| Fibrella | |||
| Fibrella aestuarina | 1 | ||
| Fibrisoma | |||
| Fibrisoma limi | 1 | ||
| Fibrobacter | |||
| Fibrobacter intestinalis | 1 | ||
| Fibrobacter succinogenes subsp. elongatus | 1 | ||
| Fibrobacter succinogenes subsp. succinogenes (Bacteroides succinogenes) | 1 | ||
| Fictibacillus | |||
| Fictibacillus aquaticus | 1 | neu | |
| Fictibacillus arsenicus (Bacillus arsenicus) | 1 | ||
| Fictibacillus barbaricus (Bacillus barbaricus) | 1 | ||
| Fictibacillus enclensis | 1 | ||
| Fictibacillus gelatini (Bacillus gelatini) | 1 | ||
| Fictibacillus halophilus | 1 | neu | |
| Fictibacillus macauensis (Bacillus macauensis) | 1 | ||
| Fictibacillus nonhaiensis (Bacillus nonhaiensis) | 1 | ||
| Fictibacillus phosphorivorans | 1 | ||
| Fictibacillus rigui (Bacillus rigui) | 1 | ||
| Fictibacillus solisalsi (Bacillus solisalsi) | 1 | ||
| Filibacter | |||
| Filibacter limicola | 1 | ||
| Filifactor | |||
| Filifactor alocis (Fusobacterium alocis) | 2 | ||
| Filifactor villosus (Clostridium villosum) | 1 | ||
| Filimonas | |||
| Filimonas aquilariae | 1 | neu | |
| Filimonas aurantiibacter | 1 | neu | |
| Filimonas endophytica | 1 | neu | |
| Filimonas lacunae | 1 | ||
| Filimonas zeae | 1 | neu | |
| Filobacillus | |||
| Filobacillus milosensis | 1 | ||
| Filobacterium | |||
| Filobacterium rodentium | 2 | t | neu |
| Filomicrobium | |||
| Filomicrobium fusiforme | 1 | ||
| Filomicrobium insigne | 1 | ||
| Fimbriiglobus | |||
| Fimbriiglobus ruber | 1 | neu | |
| Fimbriimonas | |||
| Fimbriimonas ginsengisoli | 1 | ||
| Finegoldia | |||
| Finegoldia magna (Peptococcus magnus, Peptostreptococcus magnus) | 2 | ||
| Flagellimonas | |||
| Flagellimonas eckloniae | 1 | ||
| Flammeovirga | |||
| Flammeovirga aprica (Cytophaga aprica) | 1 | ||
| Flammeovirga arenaria | 1 | ||
| Flammeovirga kamogawensis | 1 | ||
| Flammeovirga pacifica | 1 | ||
| Flammeovirga yaeyamensis | 1 | ||
| Flaviaesturariibacter | |||
| Flaviaesturariibacter amylovorans | 1 | neu | |
| Flaviaesturariibacter luteus | 1 | neu | |
| Flaviaesturariibacter terrae | 1 | neu | |
| Flavicella | |||
| Flavicella marina | 1 | neu | |
| Flaviflexus | |||
| Flaviflexus huanghaiensis | 1 | ||
| Flaviflexus salsibiostraticola | 1 | neu | |
| Flavihumibacter | |||
| Flavihumibacter cheonanensis | 1 | neu | |
| Flavihumibacter petaseus | 1 | ||
| Flavihumibacter sediminis | 1 | neu | |
| Flavihumibacter solisilvae | 1 | neu | |
| Flavihumibacter stibioxidans | 1 | neu | |
| Flavimarina | |||
| Flavimarina flava | 1 | neu | |
| Flavimarina pacifica | 1 | neu | |
| Flavimonas – synonym: Pseudomonas | |||
| Flavimonas oryzihabitans – synonym: Pseudomonas oryzihabitans | |||
| Flaviramulus | |||
| Flaviramulus aestuariivivens | 1 | neu | |
| Flaviramulus aquimarinus | 1 | neu | |
| Flaviramulus basaltis | 1 | ||
| Flaviramulus ichthyoenteri | 1 | ||
| Flavirhabdus | |||
| Flavirhabdus iliipiscaria → Lacinutrix iliipiscaria | Umb. | ||
| Flavisolibacter | |||
| Flavisolibacter ginsengisoli | 1 | ||
| Flavisolibacter ginsengiterrae | 1 | ||
| Flavisolibacter ginsenosidimutans | 1 | neu | |
| Flavisolibacter rigui | 1 | neu | |
| Flavisolibacter tropicus | 1 | neu | |
| Flavitalea | |||
| Flavitalea antarctica | 1 | neu | |
| Flavitalea gansuensis | 1 | ||
| Flavitalea populi | 1 | ||
| Flavitalea soli | 1 | neu | |
| Flavivirga | |||
| Flavivirga amylovorans | 1 | ||
| Flavivirga aquimarina | 1 | neu | |
| Flavivirga eckloniae | 1 | neu | |
| Flavivirga jejuensis | 1 | ||
| Flavobacterium | |||
| Flavobacterium acidificum | 1 | ||
| Flavobacterium aciduliphilum | 1 | ||
| Flavobacterium acidurans | 1 | ||
| Flavobacterium ahnfeltiae | 1 | neu | |
| Flavobacterium akiainvivens | 1 | ||
| Flavobacterium algicola | 1 | ||
| Flavobacterium amniphilum | 1 | neu | |
| Flavobacterium anatoliense | 1 | ||
| Flavobacterium anhuiense | 1 | ||
| Flavobacterium antarcticum | 1 | ||
| Flavobacterium aquaticum | 1 | ||
| Flavobacterium aquatile | 1 | ||
| Flavobacterium aquicola | 1 | neu | |
| Flavobacterium aquidurense | 1 | ||
| Flavobacterium araucananum | 1 | t+ | |
| Flavobacterium arcticum | 1 | neu | |
| Flavobacterium ardleyense | 1 | neu | |
| Flavobacterium arsenatis | 1 | neu | |
| Flavobacterium arsenitoxidans | 1 | neu | |
| Flavobacterium balustinum → Chryseobacterium balustinum | |||
| Flavobacterium banpakuense | 1 | ||
| Flavobacterium beibuense | 1 | ||
| Flavobacterium branchiarum | 1 | t+ | neu |
| Flavobacterium branchiicola | 1 | t+ | neu |
| Flavobacterium branchiophilum | 1 | t2 | |
| Flavobacterium breve → Empedobacter brevis | |||
| Flavobacterium brevivitae | 1 | neu | |
| Flavobacterium buctense | 1 | neu | |
| Flavobacterium caeni | 1 | ||
| Flavobacterium capsulatum → Novosphingobium capsulatum | |||
| Flavobacterium cauense | 1 | ||
| Flavobacterium ceti | 1 | ht+ | neu |
| Flavobacterium cheniae | 1 | ||
| Flavobacterium cheonanense | 1 | ||
| Flavobacterium cheonhonense | 1 | ||
| Flavobacterium chilense | 1 | t+ | |
| Flavobacterium chuncheonense | 1 | neu | |
| Flavobacterium chungangense | 1 | ||
| Flavobacterium chungbukense | 1 | ||
| Flavobacterium chungnamense | 1 | ||
| Flavobacterium cloacae | 1 | neu | |
| Flavobacterium collinsense | 1 | neu | |
| Flavobacterium collinsii | 1 | t+ | neu |
| Flavobacterium columnare (Cytophaga columnaris, Flexibacter columnaris) | 1 | t2 | |
| Flavobacterium commune | 1 | neu | |
| Flavobacterium compostarboris | 1 | ||
| Flavobacterium crassostreae | 1 | neu | |
| Flavobacterium croceum | 1 | ||
| Flavobacterium cucumis | 1 | ||
| Flavobacterium cutihirudinis | 1 | ||
| Flavobacterium daejeonense | 1 | ||
| Flavobacterium daemonensis | 1 | neu | |
| Flavobacterium dankookense | 1 | ||
| Flavobacterium defluvii | 1 | ||
| Flavobacterium degerlachei | 1 | ||
| Flavobacterium denitrificans | 1 | ||
| Flavobacterium devorans | 1 | ||
| Flavobacterium dispersum | 1 | neu | |
| Flavobacterium dongtanense | 1 | ||
| Flavobacterium eburneum | 1 | neu | |
| Flavobacterium endophyticum | 1 | neu | |
| Flavobacterium enshiense | 1 | ||
| Flavobacterium esteraromaticum → Microbacterium esteraromaticum | |||
| Flavobacterium faecale | 1 | neu | |
| Flavobacterium ferrugineum → Terrimonas ferruginea | |||
| Flavobacterium filum | 1 | ||
| Flavobacterium flaviflagrans | 1 | neu | |
| Flavobacterium flevense (Cytophaga flevensis) | 1 | ||
| Flavobacterium fluminis | 1 | neu | |
| Flavobacterium fluvii | 1 | ||
| Flavobacterium fontis | 1 | ||
| Flavobacterium frigidarium | 1 | ||
| Flavobacterium frigidimaris | 1 | ||
| Flavobacterium frigoris | 1 | ||
| Flavobacterium fryxellicola | 1 | ||
| Flavobacterium fulvum | 1 | neu | |
| Flavobacterium gelidilacus | 1 | ||
| Flavobacterium gillisiae | 1 | ||
| Flavobacterium gilvum | 1 | neu | |
| Flavobacterium ginsengisoli | 1 | ||
| Flavobacterium ginsenosidimutans | 1 | ||
| Flavobacterium glaciei | 1 | ||
| Flavobacterium gleum → Chryseobacterium gleum | |||
| Flavobacterium glycines | 1 | ||
| Flavobacterium gondwanense → Psychroflexus gondwanensis | |||
| Flavobacterium gossypii | 1 | neu | |
| Flavobacterium granuli | 1 | ||
| Flavobacterium gyeonganense | 1 | neu | |
| Flavobacterium halmephilum → Halomonas halmophila | |||
| Flavobacterium haoranii | 1 | ||
| Flavobacterium hauense | 1 | ||
| Flavobacterium heparinum → Pedobacter heparinus | |||
| Flavobacterium hercynium | 1 | ||
| Flavobacterium hibernum | 1 | ||
| Flavobacterium hibisci | 1 | neu | |
| Flavobacterium humicola | 1 | neu | |
| Flavobacterium hydatis (Cytophaga aquatilis) | 1 | t2 | |
| Flavobacterium indicum | 1 | ||
| Flavobacterium indologenes → Chryseobacterium indologenes | |||
| Flavobacterium indoltheticum → Chryseobacterium indoltheticum | |||
| Flavobacterium inkyongense | 1 | neu | |
| Flavobacterium jejuensis | 1 | neu | |
| Flavobacterium johnsoniae (Cytophaga johnsonae) | 1 | t2 | |
| Flavobacterium jumunjinense | 1 | ||
| Flavobacterium keumense | 1 | neu | |
| Flavobacterium koreense | 1 | ||
| Flavobacterium kyungheense | 1 | ||
| Flavobacterium lacunae | 1 | neu | |
| Flavobacterium lacus | 1 | ||
| Flavobacterium limi | 1 | neu | |
| Flavobacterium limicola | 1 | ||
| Flavobacterium limnosediminis | 1 | ||
| Flavobacterium lindanitolerans | 1 | + | |
| Flavobacterium longum | 1 | ||
| Flavobacterium luteum | 1 | neu | |
| Flavobacterium luticocti | 1 | neu | |
| Flavobacterium lutivivi | 1 | neu | |
| Flavobacterium macrobrachii | 1 | ||
| Flavobacterium maotaiense | 1 | neu | |
| Flavobacterium marinotypicum → Microbacterium maritypicum | |||
| Flavobacterium marinum | 1 | ||
| Flavobacterium maris | 1 | neu | |
| Flavobacterium meningosepticum → Elizabethkingia meningoseptica | |||
| Flavobacterium micromati | 1 | ||
| Flavobacterium mizutaii (Sphingobacterium mizutae) → Sphingobacterium mizutaii | |||
| Flavobacterium multivorum → Sphingobacterium multivorum | |||
| Flavobacterium myungsuense | 1 | ||
| Flavobacterium naphthae | 1 | neu | |
| Flavobacterium nitratireducens | 1 | ||
| Flavobacterium nitrogenifigens | 1 | neu | |
| Flavobacterium noncentrifugens | 1 | ||
| Flavobacterium notoginsengisoli | 1 | neu | |
| Flavobacterium oceanosedimentum | 1 | ||
| Flavobacterium odoratum → Myroides odoratus | |||
| Flavobacterium okeanokoites → Planomicrobium okeanokoites | |||
| Flavobacterium olei | 1 | neu | |
| Flavobacterium omnivorum | 1 | ||
| Flavobacterium oncorhynchi | 1 | t2 | |
| Flavobacterium orientale | 1 | neu | |
| Flavobacterium oryzae | 1 | neu | |
| Flavobacterium palustre | 1 | neu | |
| Flavobacterium paronense | 1 | neu | |
| Flavobacterium pectinovorum (Cytophaga pectinovora) | 1 | ||
| Flavobacterium pedocola | 1 | neu | |
| Flavobacterium phragmitis | 1 | ||
| Flavobacterium piscis | 1 | t2 | |
| Flavobacterium plurextorum | 1 | t2 | |
| Flavobacterium ponti | 1 | ||
| Flavobacterium procerum | 1 | neu | |
| Flavobacterium psychrolimnae | 1 | ||
| Flavobacterium psychrophilum (Cytophaga psychrophila, Flexibacter psychrophilus) | 1 | t2 | |
| Flavobacterium qiangtangense | 1 | neu | |
| Flavobacterium quisquiliarum | 1 | neu | |
| Flavobacterium rakeshii | 1 | ||
| Flavobacterium reichenbachii | 1 | ||
| Flavobacterium resinovorum → Novosphingobium resinovorum | 1 | ||
| Flavobacterium resistens | 1 | ||
| Flavobacterium rivuli | 1 | ||
| Flavobacterium saccharophilum (Cytophaga saccharophila) | 1 | ||
| Flavobacterium salegens → Salegentibacter salegens | |||
| Flavobacterium saliperosum | 1 | ||
| Flavobacterium sasangense | 1 | ||
| Flavobacterium scophthalmum → Chryseobacterium scophthalmum | |||
| Flavobacterium segetis | 1 | ||
| Flavobacterium seoulense | 1 | neu | |
| Flavobacterium sinopsychrotolerans | 1 | ||
| Flavobacterium soli | 1 | ||
| Flavobacterium soyangense | 1 | neu | |
| Flavobacterium spartansii | 1 | t2 | neu |
| Flavobacterium spiritivorum → Sphingobacterium spiritivorum | |||
| Flavobacterium squillarum | 1 | ||
| Flavobacterium suaedae | 1 | neu | |
| Flavobacterium subsaxonicum | 1 | ||
| Flavobacterium succinicans (Cytophaga succinicans) | 1 | ||
| Flavobacterium suncheonense | 1 | ||
| Flavobacterium suzhouense | 1 | neu | |
| Flavobacterium swingsii | 1 | ||
| Flavobacterium tegetincola | 1 | ||
| Flavobacterium terrae | 1 | ||
| Flavobacterium terrigena | 1 | ||
| Flavobacterium terriphilum | 1 | neu | |
| Flavobacterium thalpophilum → Sphingobacterium thalpophilum | |||
| Flavobacterium thermophilum | 1 | ||
| Flavobacterium tiangeerense | 1 | ||
| Flavobacterium tilapiae | 1 | ||
| Flavobacterium tistrianum | 1 | neu | |
| Flavobacterium tructae | 1 | t2 | |
| Flavobacterium tyrosinilyticum | 1 | neu | |
| Flavobacterium uliginosum → Zobellia uliginosa | |||
| Flavobacterium ummariense | 1 | ||
| Flavobacterium urocaniciphilum | 1 | ||
| Flavobacterium urumqiense | 1 | ||
| Flavobacterium verecundum | 1 | neu | |
| Flavobacterium vireti | 1 | neu | |
| Flavobacterium weaverense | 1 | ||
| Flavobacterium xanthum | 1 | ||
| Flavobacterium xinjiangense | 1 | ||
| Flavobacterium xueshanense | 1 | ||
| Flavobacterium yabuuchiae – synonym: Sphingobacterium spiritivorum | |||
| Flavobacterium yanchengense | 1 | ||
| Flavobacterium yonginense | 1 | ||
| Flavonifractor | |||
| Flavonifractor plautii (Clostridium orbiscindens, Eubacterium plautii, Fusobacterium plauti) | 2 | ||
| Flectobacillus | |||
| Flectobacillus fontis | 1 | neu | |
| Flectobacillus glomeratus → Polaribacter glomeratus | |||
| Flectobacillus lacus | 1 | ||
| Flectobacillus major | 1 | ||
| Flectobacillus marinus → Cyclobacterium marinum | |||
| Flectobacillus pallidus | 1 | neu | |
| Flectobacillus rhizosphaerae | 1 | neu | |
| Flectobacillus roseus | 1 | ||
| Flexibacter | |||
| Flexibacter aggregans – synonym: Flexithrix dorotheae | |||
| Flexibacter aurantiacus | 1 | ||
| Flexibacter canadensis → Solitalea canadensis | |||
| Flexibacter columnaris → Flavobacterium columnare | |||
| Flexibacter elegans → Eisenibacter elegans | Umb. | ||
| Flexibacter filiformis → Chitinophaga filiformis | |||
| Flexibacter flexilis | 1 | ||
| Flexibacter japonensis → Chitinophaga japonensis | |||
| Flexibacter litoralis → Bernardetia litoralis | Umb. | ||
| Flexibacter maritimus → Tenacibaculum maritimum | |||
| Flexibacter ovolyticus → Tenacibaculum ovolyticum | |||
| Flexibacter polymorphus → Garritya polymorpha | Umb. | ||
| Flexibacter psychrophilus → Flavobacterium psychrophilum | |||
| Flexibacter roseolus → Hugenholtzia roseola | Umb. | ||
| Flexibacter ruber → Thermoflexibacter ruber | Umb. | ||
| Flexibacter sancti → Chitinophaga sancti | |||
| Flexibacter tractuosus → Marivirga tractuosa | |||
| Flexilinea | |||
| Flexilinea flocculi | 1 | neu | |
| Flexistipes | |||
| Flexistipes sinusarabici | 1 | ||
| Flexithrix | |||
| Flexithrix dorotheae | 1 | ||
| Flexivirga | |||
| Flexivirga alba | 1 | ||
| Flexivirga endophytica | 1 | neu | |
| Flexivirga lutea | 1 | neu | |
| Flexivirga oryzae | 1 | neu | |
| Flindersiella | |||
| Flindersiella endophytica | 1 | ||
| Flintibacter | |||
| Flintibacter butyricus | 1 | neu | |
| Floricoccus | |||
| Floricoccus penangensis | 1 | neu | |
| Floricoccus tropicus | 1 | neu | |
| Fluoribacter | |||
| Fluoribacter bozemanae (Legionella bozemanii) | 2 | ||
| Fluoribacter dumoffii (Legionella dumoffii) | 2 | ||
| Fluoribacter gormanii (Legionella gormanii) | 2 | ||
| Fluviicoccus | |||
| Fluviicoccus keumensis | 1 | neu | |
| Fluviicola | |||
| Fluviicola hefeinensis | 1 | ||
| Fluviicola taffensis | 1 | ||
| Fluviimonas | |||
| Fluviimonas pallidilutea | 1 | ||
| Fodinibacter | |||
| Fodinibacter luteus | 1 | ||
| Fodinibius | |||
| Fodinibius salinus | 1 | ||
| Fodinicola | |||
| Fodinicola feengrottensis | 1 | ||
| Fodinicurvata | |||
| Fodinicurvata fenggangensis | 1 | ||
| Fodinicurvata halophila | 1 | neu | |
| Fodinicurvata sediminis | 1 | ||
| Fontibacillus | |||
| Fontibacillus aquaticus | 1 | ||
| Fontibacillus panacisegetis | 1 | ||
| Fontibacillus phaseoli | 1 | neu | |
| Fontibacillus solani | 1 | neu | |
| Fontibacter | |||
| Fontibacter ferrireducens | 1 | ||
| Fontibacter flavus | 1 | ||
| Fonticella | |||
| Fonticella tunisiensis | 1 | ||
| Fontimonas | |||
| Fontimonas thermophila | 1 | ||
| Formivibrio | |||
| Formivibrio citricus | 1 | ||
| Formosa | |||
| Formosa agariphila | 1 | ||
| Formosa algae | 1 | ||
| Formosa arctica | 1 | ||
| Formosa haliotis | 1 | neu | |
| Formosa spongicola | 1 | ||
| Formosa undariae | 1 | ||
| Formosimonas | |||
| Formosimonas limnophila | 1 | neu | |
| Fournierella | |||
| Fournierella massiliensis | 1 | neu | |
| Francisella | |||
| Francisella guangzhouensis → Allofrancisella guangzhouensis | Umb. | ||
| Francisella halioticida | 1 | n | |
| Francisella hispaniensis | 2 | ||
| Francisella noatunensis subsp. noatunensis (Francisella philomiragia subsp. noatunensis) | 1 | t2 | |
| Francisella noatunensis subsp. orientalis | 1 | t2 | |
| Francisella novicida → Francisella tularensis subsp. novicida | |||
| Francisella persica (Wolbachia persica) | 1 | Umb. | |
| Francisella philomiragia (Francisella philomiragia subsp. philomiragia, Yersinia philomiragia) | 2 | ht | |
| "Francisella philomiragia subsp. noatunensis → Francisella noatunensis subsp. noatunensis" | |||
| Francisella philomiragia subsp. philomiragia (Yersinia philomiragia) → Francisella philomiragia | |||
| Francisella piscicida – synonym: Francisella noatunensis subsp. noatunensis | |||
| Francisella tularensis subsp. holarctica | 2 | Z | |
| Francisella tularensis subsp. mediasiatica | 2 | Z | |
| Francisella tularensis subsp. novicida (Francisella novicida) | 2 | ||
| Francisella tularensis subsp. tularensis | 3 | Z | |
| Franconibacter | |||
| Franconibacter daqui | 1 | neu | |
| Franconibacter helveticus (Cronobacter helveticus, Enterobacter helveticus) | 1 | Umb., Einst. | |
| Franconibacter pulveris (Cronobacter pulveris, Enterobacter pulveris) | 1 | Umb., Einst. | |
| Frankia | |||
| Frankia alni | 1 | ||
| Frankia asymbiotica | 1 | neu | |
| Frankia casuarinae | 1 | neu | |
| Frankia coriariae | 1 | neu | |
| Frankia discariae | 1 | neu | |
| Frankia elaeagni | 1 | neu | |
| Frankia inefficax | 1 | neu | |
| Frateuria | |||
| Frateuria aurantia | 1 | ||
| Frateuria terrea | 1 | ||
| Frederiksenia | |||
| Frederiksenia canicola | 2 | Z | neu |
| Fretibacter | |||
| Fretibacter rubidus | 1 | ||
| Fretibacterium | |||
| Fretibacterium fastidiosum | 1 | + | |
| Friedmanniella | |||
| Friedmanniella aerolata | 1 | neu | |
| Friedmanniella antarctica | 1 | ||
| Friedmanniella capsulata | 1 | ||
| Friedmanniella endophytica | 1 | neu | |
| Friedmanniella flava | 1 | ||
| Friedmanniella lacustris | 1 | ||
| Friedmanniella lucida | 1 | ||
| Friedmanniella luteola | 1 | ||
| Friedmanniella okinawensis | 1 | ||
| Friedmanniella sagamiharensis | 1 | ||
| Friedmanniella spumicola | 1 | ||
| Frigidibacter | |||
| Frigidibacter albus | 1 | neu | |
| Frigoribacterium | |||
| Frigoribacterium endophyticum | 1 | neu | |
| Frigoribacterium faeni | 1 | ||
| Frigoribacterium mesophilum → Parafrigoribacterium mesophilum | Umb. | ||
| Frigoribacterium salinisoli | 1 | neu | |
| Frischella | |||
| Frischella perrara | 1 | ||
| Frisingicoccus | |||
| Frisingicoccus caecimuris | 1 | neu | |
| Frondibacter | |||
| Frondibacter aureus | 1 | neu | |
| Frondibacter mangrovi | 1 | neu | |
| Frondicola → Frondihabitans | |||
| Frondicola australicus → Frondihabitans australicus | |||
| Frondihabitans | |||
| Frondihabitans australicus (Frondicola australicus) | 1 | ||
| Frondihabitans cladoniiphilus | 1 | ||
| Frondihabitans peucedani | 1 | ||
| Frondihabitans sucicola | 1 | ||
| Fructobacillus | |||
| Fructobacillus durionis (Leuconostoc durionis) | 1 | ||
| Fructobacillus ficulneus (Leuconostoc ficulneum) | 1 | ||
| Fructobacillus fructosus (Leuconostoc fructosum, Lactobacillus fructosus) | 1 | ||
| Fructobacillus pseudoficulneus (Leuconostoc pseudoficulneum) | 1 | ||
| Fructobacillus tropaeoli | 1 | ||
| Fuchsiella | |||
| Fuchsiella alkaliacetigena | 1 | ||
| Fuchsiella ferrireducens | 1 | neu | |
| Fulvibacter | |||
| Fulvibacter tottoriensis | 1 | ||
| Fulvimarina | |||
| Fulvimarina manganoxydans | 1 | neu | |
| Fulvimarina pelagi | 1 | ||
| Fulvimonas | |||
| Fulvimonas soli | 1 | ||
| Fulvimonas yonginensis | 1 | neu | |
| Fulvitalea | |||
| Fulvitalea axinellae | 1 | neu | |
| Fulvivirga | |||
| Fulvivirga imtechensis | 1 | neu | |
| Fulvivirga kasyanovii | 1 | ||
| Fulvivirga lutimaris | 1 | neu | |
| Fundibacter → Alcanivorax | |||
| Fundibacter jadensis → Alcanivorax jadensis | |||
| Fusibacter | |||
| Fusibacter bizertensis | 1 | neu | |
| Fusibacter fontis | 1 | neu | |
| Fusibacter paucivorans | 1 | ||
| Fusibacter tunisiensis | 1 | ||
| Fusicatenibacter | |||
| Fusicatenibacter saccharivorans | 1 | ||
| Fusobacterium | |||
| Fusobacterium alocis → Filifactor alocis | |||
| Fusobacterium canifelinum | 2 | Z | |
| Fusobacterium equinum | 2 | t | |
| Fusobacterium gonidiaformans | 2 | ||
| Fusobacterium mortiferum | 2 | ||
| Fusobacterium naviforme | 2 | ht | |
| Fusobacterium necrogenes | 2 | ||
| Fusobacterium necrophorum subsp. funduliforme | 2 | ht | |
| Fusobacterium necrophorum subsp. necrophorum | 2 | ht | |
| Fusobacterium nucleatum subsp. animalis | 2 | ||
| Fusobacterium nucleatum subsp. fusiforme synonym: Fusobacterium nucleatum subsp. vincentii | Umb. | ||
| Fusobacterium nucleatum subsp. nucleatum | 2 | ||
| Fusobacterium nucleatum subsp. polymorphum | 2 | ||
| Fusobacterium nucleatum subsp. vincentii | 2 | ||
| Fusobacterium perfoetens | 1 | + | |
| Fusobacterium periodonticum | 2 | ||
| Fusobacterium plauti → Flavonifractor plautii | Umb. | ||
| Fusobacterium polysaccharolyticum → Clostridium polysaccharolyticum | |||
| Fusobacterium prausnitzii → Faecalibacterium prausnitzii | |||
| Fusobacterium pseudonecrophorum – synonym: Fusobacterium varium | |||
| Fusobacterium russii | 2 | ||
| Fusobacterium simiae | 1 | ||
| Fusobacterium sulci → Eubacterium sulci | |||
| Fusobacterium ulcerans | 2 | ||
| Fusobacterium varium | 2 | ht |