Largest genera

This page lists the number of species of the largest genera, sorted by genus size, decreasingly. The counts only consider names that are ☞ validly published under the ☞ ICNP, ☞ legitimate, and not ☞ rejected, and are currently treated as the ☞ correct name in LPSN. As could be expected from count data, the frequency distribution strongly deviates from a standard normal distribution. This is obvious from the statistics section and from the sizes of the largest genera shown below.

For the approximate number of taxonomic proposals per country see the page on corresponding authors. For the overall number of taxon names, see the page on numbers in LPSN. There is also a page on the number of taxon names per year.

Average: 5.55 species

Median: 2.00 species

Mode: 1 species

Streptomyces (802)

Pseudomonas (362) — Flavobacterium (353) — Paenibacillus (332) — Mycobacterium (218) — Sphingomonas (185) — Nocardioides (179) — Clostridium (172) — Microbacterium (172) — Corynebacterium (168) — Chryseobacterium (158) — Vibrio (156) — Streptococcus (140) — Micromonospora (135) — Nocardia (132) — Halomonas (130) — Bacillus (118) — Hymenobacter (117) — Pedobacter (113) — Bifidobacterium (109) — Shewanella (101)

Paraburkholderia (97) — Amycolatopsis (96) — Deinococcus (94) — Rhizobium (94) — Paracoccus (93) — Acinetobacter (90) — Mucilaginibacter (90) — Lysobacter (78) — Actinomadura (77) — Arthrobacter (76) — Bradyrhizobium (75) — Leptospira (73) — Sphingobacterium (71) — Staphylococcus (71) — Marinobacter (70) — Nonomuraea (70) — Novosphingobium (70) — Pseudonocardia (69) — Legionella (67) — Massilia (67) — Enterococcus (66) — Mesorhizobium (62) — Prevotella (61) — Actinoplanes (59) — Rhodococcus (59) — Methylobacterium (58) — Gordonia (56) — Helicobacter (56) — Bacteroides (53) — Nocardiopsis (53) — Pseudoalteromonas (53) — Mycoplasma (52) — Winogradskyella (52) — Algoriphagus (51) — Campylobacter (51) — Agromyces (50) — Lactobacillus (50) — Pontibacter (50)

Chitinophaga (49) — Sphingobium (49) — Flagellimonas (48) — Spirosoma (48) — Psychrobacter (47) — Marinomonas (44) — Mycoplasmopsis (44) — Borrelia (43) — Roseovarius (43) — Bartonella (42) — Cellulomonas (42) — Brevibacterium (41) — Devosia (40) — Halorubrum (40) — Luteimonas (40) — Thermococcus (40) — Xanthomonas (40) — Alteromonas (39) — Cohnella (39) — Maribacter (39) — Photobacterium (39) — Saccharopolyspora (39) — Tenacibaculum (39) — Brevundimonas (38) — Kitasatospora (38) — Burkholderia (37) — Qipengyuania (37) — Spiroplasma (37) — Virgibacillus (37) — Actinomyces (35) — Arcobacter (35) — Companilactobacillus (35) — Dyella (35) — Lacticaseibacillus (35) — Leucobacter (35) — Acetobacter (34) — Aeromonas (34) — Brevibacillus (34) — Limosilactobacillus (34) — Microbulbifer (34) — Streptosporangium (34) — Aquimarina (33) — Cryobacterium (33) — Haloarcula (33) — Kribbella (33) — Neisseria (33) — Planococcus (33) — Glycomyces (32) — Levilactobacillus (32) — Comamonas (31) — Dyadobacter (31) — Polynucleobacter (31) — Blautia (30) — Oceanobacillus (30) — Polaribacter (30) — Alicyclobacillus (29) — Caballeronia (29) — Listeria (29) — Rheinheimera (29) — Rickettsia (29) — Xenorhabdus (29) — Enterobacter (28) — Eubacterium (28) — Microvirga (28) — Neobacillus (28) — Nesterenkonia (28) — Pandoraea (28) — Treponema (28) — Brachybacterium (27) — Methanobacterium (27) — Stenotrophomonas (27) — Thalassotalea (27) — Demequina (26) — Kocuria (26) — Lentzea (26) — Undibacterium (26) — Yersinia (26) — Aeromicrobium (25) — Azospirillum (25) — Halobacillus (25) — Lysinibacillus (25) — Pantoea (25) — Peptoniphilus (25) — Photorhabdus (25) — Roseateles (25) — Thermus (25) — Aequorivita (24) — Ensifer (24) — Moraxella (24) — Rhodobacter (24) — Saccharothrix (24) — Serratia (24) — Sulfitobacter (24) — Cupriavidus (23) — Janthinobacterium (23) — Ruegeria (23) — Vagococcus (23) — Achromobacter (22) — Acidovorax (22) — Ancylobacter (22) — Christiangramia (22) — Colwellia (22) — Marinobacterium (22) — Metabacillus (22) — Natrinema (22) — Pectobacterium (22) — Sphingopyxis (22) — Sporosarcina (22) — Variovorax (22) — Brucella (21) — Erwinia (21) — Geodermatophilus (21) — Gracilibacillus (21) — Peribacillus (21) — Pseudidiomarina (21) — Pseudoxanthomonas (21) — Rhodanobacter (21) — Veillonella (21) — Weissella (21) — Actinomycetospora (20) — Cytobacillus (20) — Desulfovibrio (20) — Duganella (20) — Komagataeibacter (20) — Lactiplantibacillus (20) — Lentibacillus (20) — Lentilactobacillus (20) — Ligilactobacillus (20) — Microlunatus (20) — Porphyromonas (20) — Rhodovulum (20) — Actinokineospora (19) — Agrobacterium (19) — Anaerococcus (19) — Klebsiella (19) — Leuconostoc (19) — Phenylobacterium (19) — Ramlibacter (19) — Actinoallomurus (18) — Actinobacillus (18) — Alcanivorax (18) — Blastococcus (18) — Georgenia (18) — Metamycoplasma (18) — Ralstonia (18) — Salinicoccus (18) — Aureimonas (17) — Citrobacter (17) — Erythrobacter (17) — Frankia (17) — Gemmobacter (17) — Gluconobacter (17) — Halorussus (17) — Methanoculleus (17) — Methanosarcina (17) — Myroides (17) — Noviherbaspirillum (17) — Providencia (17) — Psychromonas (17) — Roseibium (17) — Streptacidiphilus (17) — Tessaracoccus (17) — Xanthobacter (17) — Acholeplasma (16) — Anoxybacillus (16) — Arenimonas (16) — Aurantiacibacter (16) — Dactylosporangium (16) — Fusobacterium (16) — Geomonas (16) — Hydrogenophaga (16) — Lactococcus (16) — Macrococcus (16) — Megasphaera (16) — Methanobrevibacter (16) — Methylomonas (16) — Phyllobacterium (16) — Pseudarthrobacter (16) — Pseudodesulfovibrio (16) — Psychroflexus (16) — Secundilactobacillus (16) — Stutzerimonas (16) — Tsukamurella (16) — Bordetella (15) — Chlamydia (15) — Chromobacterium (15) — Exiguobacterium (15) — Haemophilus (15) — Halopseudomonas (15) — Jannaschia (15) — Kineococcus (15) — Leifsonia (15) — Ornithinimicrobium (15) — Parabacteroides (15) — Phocaeicola (15) — Pseudooceanicola (15) — Teichococcus (15) — Thermoanaerobacter (15) — Ureibacillus (15) — Algibacter (14) — Corallococcus (14) — Curtobacterium (14) — Dickeya (14) — Falsiroseomonas (14) — Haloferax (14) — Mesobacillus (14) — Niabella (14) — Prauserella (14) — Promicromonospora (14) — Rahnella (14) — Saccharomonospora (14) — Salinicola (14) — Selenomonas (14) — Sphaerisporangium (14) — Sporolactobacillus (14) — Adlercreutzia (13) — Aerococcus (13) — Aliidiomarina (13) — Alistipes (13) — Apilactobacillus (13) — Arenibacter (13) — Bizionia (13) — Capnocytophaga (13) — Caulobacter (13) — Desulfosporosinus (13) — Fictibacillus (13) — Fructobacillus (13) — Halobaculum (13) — Halobellus (13) — Herbaspirillum (13) — Hyphomonas (13) — Idiomarina (13) — Isoptericola (13) — Lacinutrix (13) — Liquorilactobacillus (13) — Mesoplasma (13) — Nakamurella (13) — Nonlabens (13) — Rothia (13) — Salegentibacter (13) — Salinimicrobium (13) — Shimia (13) — Terrimonas (13) — Thalassospira (13) — Thauera (13) — Thiomicrorhabdus (13) — Vogesella (13) — Actinopolyspora (12) — Aquirufa (12) — Brenneria (12) — Carnobacterium (12) — Cellvibrio (12) — Dietzia (12) — Geobacillus (12) — Geobacter (12) — Geothrix (12) — Gluconacetobacter (12) — Halalkalibacter (12) — Haloplanus (12) — Lewinella (12) — Luteolibacter (12) — Lutibacter (12) — Methanolobus (12) — Methylorubrum (12) — Microbispora (12) — Nitratireductor (12) — Roseomonas (12) — Rufibacter (12) — Schaalia (12) — Sinomonas (12) — Streptomonospora (12) — Sulfurospirillum (12) — Thermomonas (12) — Williamsia (12) — Yoonia (12) — Actinophytocola (11) — Adhaeribacter (11) — Agrococcus (11) — Aliiroseovarius (11) — Altererythrobacter (11) — Cyclobacterium (11) — Endozoicomonas (11) — Ferrimonas (11) — Fructilactobacillus (11) — Fulvivirga (11) — Granulicella (11) — Halanaerobium (11) — Halosimplex (11) — Hyphomicrobium (11) — Janibacter (11) — Jiangella (11) — Kangiella (11) — Knoellia (11) — Lacrimispora (11) — Larkinella (11) — Mesomycoplasma (11) — Mesonia (11) — Methylophaga (11) — Modestobacter (11) — Myxococcus (11) — Ornithinibacillus (11) — Pasteurella (11) — Pediococcus (11) — Polyangium (11) — Proteus (11) — Rhodoferax (11) — Rubrobacter (11) — Sphingorhabdus (11) — Spirochaeta (11) — Sporomusa (11) — Trinickia (11) — Acidithiobacillus (10) — Alkalibacterium (10) — Alkaliphilus (10) — Allorhizobium (10) — Aquabacterium (10) — Arcanobacterium (10) — Aromatoleum (10) — Asticcacaulis (10) — Catellatospora (10) — Celeribacter (10) — Clavibacter (10) — Croceicoccus (10) — Dokdonia (10) — Emticicia (10) — Faecalibacterium (10) — Flavihumibacter (10) — Gemella (10) — Glutamicibacter (10) — Halobacterium (10) — Halococcus (10) — Ideonella (10) — Jeotgalibacillus (10) — Jiella (10) — Kaistia (10) — Kibdelosporangium (10) — Kosakonia (10) — Kushneria (10) — Magnetospirillum (10) — Mannheimia (10) — Methylocystis (10) — Oceanisphaera (10) — Olsenella (10) — Ottowia (10) — Palleronia (10) — Paraglaciecola (10) — Parapedobacter (10) — Priestia (10) — Rhodopseudomonas (10) — Robertmurraya (10) — Rodentibacter (10) — Ruminococcus (10) — Shinella (10) — Sphingomicrobium (10) — Sulfurimonas (10) — Terrabacter (10) — Thioalkalivibrio (10) — Thioclava (10) — Thiothrix (10) — Tsuneonella (10) — Tumebacillus (10) — Ureaplasma (10)