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: 5.47 species

Median: 2.00 species

Mode: 1 species

Streptomyces (758)

Pseudomonas (354) — Flavobacterium (329) — Paenibacillus (316) — Mycobacterium (203) — Sphingomonas (172) — Nocardioides (171) — Clostridium (169) — Corynebacterium (166) — Microbacterium (160) — Vibrio (153) — Chryseobacterium (152) — Streptococcus (138) — Nocardia (131) — Micromonospora (130) — Halomonas (128) — Bacillus (114) — Hymenobacter (109) — Pedobacter (108) — Bifidobacterium (107) — Shewanella (101)

Paraburkholderia (96) — Rhizobium (95) — Amycolatopsis (94) — Deinococcus (91) — Paracoccus (89) — Acinetobacter (87) — Mucilaginibacter (81) — Actinomadura (78) — Arthrobacter (74) — Bradyrhizobium (73) — Leptospira (73) — Lysobacter (73) — Sphingobacterium (71) — Staphylococcus (70) — Pseudonocardia (69) — Nonomuraea (68) — Novosphingobium (68) — Marinobacter (67) — Legionella (66) — Massilia (66) — Enterococcus (64) — Prevotella (61) — Mesorhizobium (60) — Actinoplanes (59) — Rhodococcus (59) — Helicobacter (56) — Methylobacterium (56) — Gordonia (55) — Mycoplasma (52) — Pseudoalteromonas (52) — Winogradskyella (52) — Bacteroides (51) — Nocardiopsis (51) — Algoriphagus (50) — Campylobacter (50) — Lactobacillus (50)

Pontibacter (49) — Chitinophaga (48) — Sphingobium (48) — Psychrobacter (47) — Spirosoma (47) — Agromyces (45) — Flagellimonas (45) — Mycoplasmopsis (44) — Borrelia (43) — Marinomonas (43) — Bartonella (42) — Cellulomonas (42) — Brevibacterium (40) — Halorubrum (40) — Roseovarius (40) — Saccharopolyspora (40) — Devosia (39) — Photobacterium (39) — Thermococcus (39) — Xanthomonas (39) — Tenacibaculum (38) — Spiroplasma (37) — Virgibacillus (37) — Alteromonas (36) — Brevundimonas (36) — Burkholderia (36) — Cohnella (36) — Kitasatospora (36) — Luteimonas (36) — Qipengyuania (36) — Actinomyces (35) — Companilactobacillus (35) — Dyella (35) — Leucobacter (35) — Acetobacter (34) — Arcobacter (34) — Brevibacillus (34) — Limosilactobacillus (34) — Cryobacterium (33) — Kribbella (33) — Lacticaseibacillus (33) — Maribacter (33) — Neisseria (33) — Aeromonas (32) — Aquimarina (32) — Haloarcula (32) — Microbulbifer (32) — Glycomyces (31) — Levilactobacillus (31) — Polynucleobacter (31) — Streptosporangium (31) — Comamonas (30) — Dyadobacter (30) — Planococcus (30) — Alicyclobacillus (29) — Listeria (29) — Oceanobacillus (29) — Polaribacter (29) — Rheinheimera (29) — Rickettsia (29) — Xenorhabdus (29) — Blautia (28) — Caballeronia (28) — Eubacterium (28) — Pandoraea (28) — Treponema (28) — Brachybacterium (27) — Enterobacter (27) — Methanobacterium (27) — Nesterenkonia (27) — Stenotrophomonas (27) — Thalassotalea (27) — Demequina (26) — Lentzea (26) — Neobacillus (26) — Undibacterium (26) — Yersinia (26) — Aeromicrobium (25) — Azospirillum (25) — Brucella (25) — Halobacillus (25) — Microvirga (25) — Photorhabdus (25) — Thermus (25) — Aequorivita (24) — Moraxella (24) — Rhodobacter (24) — Saccharothrix (24) — Serratia (24) — Sulfitobacter (24) — Ensifer (23) — Kocuria (23) — Ruegeria (23) — Vagococcus (23) — Achromobacter (22) — Acidovorax (22) — Christiangramia (22) — Colwellia (22) — Lysinibacillus (22) — Marinobacterium (22) — Metabacillus (22) — Natrinema (22) — Pectobacterium (22) — Peptoniphilus (22) — Sphingopyxis (22) — Sporosarcina (22) — Ancylobacter (21) — Cupriavidus (21) — Geodermatophilus (21) — Gracilibacillus (21) — Pantoea (21) — Peribacillus (21) — Pseudoxanthomonas (21) — Rhodanobacter (21) — Roseateles (21) — Veillonella (21) — Weissella (21) — Actinomycetospora (20) — Desulfovibrio (20) — Duganella (20) — Erwinia (20) — Lactiplantibacillus (20) — Lentibacillus (20) — Lentilactobacillus (20) — Ligilactobacillus (20) — Microlunatus (20) — Porphyromonas (20) — Rhodovulum (20) — Actinokineospora (19) — Agrobacterium (19) — Exiguobacterium (19) — Komagataeibacter (19) — Phenylobacterium (19) — Pseudidiomarina (19) — Ramlibacter (19) — Actinoallomurus (18) — Actinobacillus (18) — Alcanivorax (18) — Cytobacillus (18) — Geomonas (18) — Leuconostoc (18) — Metamycoplasma (18) — Ralstonia (18) — Salinicoccus (18) — Blastococcus (17) — Citrobacter (17) — Erythrobacter (17) — Frankia (17) — Gemmobacter (17) — Gluconobacter (17) — Halorussus (17) — Klebsiella (17) — Methanoculleus (17) — Myroides (17) — Roseibium (17) — Streptacidiphilus (17) — Acholeplasma (16) — Anoxybacillus (16) — Arenimonas (16) — Aurantiacibacter (16) — Aureimonas (16) — Dactylosporangium (16) — Fusobacterium (16) — Hydrogenophaga (16) — Lactococcus (16) — Methanobrevibacter (16) — Noviherbaspirillum (16) — Pseudarthrobacter (16) — Psychroflexus (16) — Secundilactobacillus (16) — Stutzerimonas (16) — Tessaracoccus (16) — Tsukamurella (16) — Anaerococcus (15) — Bordetella (15) — Chromobacterium (15) — Haemophilus (15) — Halopseudomonas (15) — Leifsonia (15) — Methanosarcina (15) — Methylomonas (15) — Ornithinimicrobium (15) — Providencia (15) — Pseudooceanicola (15) — Psychromonas (15) — Teichococcus (15) — Thermoanaerobacter (15) — Ureibacillus (15) — Algibacter (14) — Bosea (14) — Chlamydia (14) — Corallococcus (14) — Falsiroseomonas (14) — Georgenia (14) — Haloferax (14) — Kineococcus (14) — Megasphaera (14) — Mesobacillus (14) — Niabella (14) — Parabacteroides (14) — Phocaeicola (14) — Phyllobacterium (14) — Prauserella (14) — Promicromonospora (14) — Pseudodesulfovibrio (14) — Saccharomonospora (14) — Selenomonas (14) — Sphaerisporangium (14) — Adlercreutzia (13) — Aerococcus (13) — Aliidiomarina (13) — Arenibacter (13) — Bizionia (13) — Desulfosporosinus (13) — Dickeya (13) — Fructobacillus (13) — Halobaculum (13) — Herbaspirillum (13) — Idiomarina (13) — Jannaschia (13) — Lacinutrix (13) — Liquorilactobacillus (13) — Nakamurella (13) — Nonlabens (13) — Rahnella (13) — Rothia (13) — Salegentibacter (13) — Salinicola (13) — Salinimicrobium (13) — Shimia (13) — Sporolactobacillus (13) — Thalassospira (13) — Thiomicrorhabdus (13) — Variovorax (13) — Vogesella (13) — Actinopolyspora (12) — Alistipes (12) — Brenneria (12) — Capnocytophaga (12) — Carnobacterium (12) — Caulobacter (12) — Dietzia (12) — Fictibacillus (12) — Geobacillus (12) — Geobacter (12) — Geothrix (12) — Gluconacetobacter (12) — Halalkalibacter (12) — Halobellus (12) — Haloplanus (12) — Hyphomonas (12) — Lewinella (12) — Luteolibacter (12) — Lutibacter (12) — Macrococcus (12) — Mesoplasma (12) — Methanolobus (12) — Methylorubrum (12) — Microbispora (12) — Pasteurella (12) — Schaalia (12) — Sinomonas (12) — Terrimonas (12) — Thauera (12) — Thermomonas (12) — Williamsia (12) — Yoonia (12) — Actinophytocola (11) — Adhaeribacter (11) — Agrococcus (11) — Aliiroseovarius (11) — Apilactobacillus (11) — Cellvibrio (11) — Curtobacterium (11) — Endozoicomonas (11) — Ferrimonas (11) — Fructilactobacillus (11) — Fulvivirga (11) — Granulicella (11) — Halanaerobium (11) — Hyphomicrobium (11) — Isoptericola (11) — Janibacter (11) — Jiangella (11) — Lacrimispora (11) — Larkinella (11) — Mesomycoplasma (11) — Mesonia (11) — Methylophaga (11) — Modestobacter (11) — Myxococcus (11) — Nitratireductor (11) — Paraglaciecola (11) — Pediococcus (11) — Polyangium (11) — Rhodoferax (11) — Roseomonas (11) — Rubrobacter (11) — Sphingorhabdus (11) — Spirochaeta (11) — Sulfurospirillum (11) — Trinickia (11) — Acidithiobacillus (10) — Alkalibacterium (10) — Alkaliphilus (10) — Allorhizobium (10) — Aquabacterium (10) — Arcanobacterium (10) — Aromatoleum (10) — Asticcacaulis (10) — Celeribacter (10) — Clavibacter (10) — Croceicoccus (10) — Cyclobacterium (10) — Emticicia (10) — Flavihumibacter (10) — Gemella (10) — Glutamicibacter (10) — Halococcus (10) — Ideonella (10) — Jeotgalibacillus (10) — Kaistia (10) — Kangiella (10) — Kibdelosporangium (10) — Kosakonia (10) — Kushneria (10) — Magnetospirillum (10) — Mannheimia (10) — Methylocystis (10) — Olsenella (10) — Ornithinibacillus (10) — Ottowia (10) — Palleronia (10) — Parapedobacter (10) — Priestia (10) — Proteus (10) — Rhodopseudomonas (10) — Rodentibacter (10) — Rufibacter (10) — Ruminococcus (10) — Shinella (10) — Sporomusa (10) — Streptomonospora (10) — Sulfurimonas (10) — Terrabacter (10) — Thioalkalivibrio (10) — Thiothrix (10) — Tsuneonella (10) — Tumebacillus (10) — Ureaplasma (10)