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: 5.35 species
Median: 2.00 species
Mode: 1 species
Streptomyces (718)
Pseudomonas (322) — Paenibacillus (298) — Flavobacterium (292) — Mycobacterium (196) — Nocardioides (166) — Clostridium (160) — Corynebacterium (160) — Sphingomonas (159) — Vibrio (149) — Chryseobacterium (145) — Microbacterium (138) — Nocardia (130) — Micromonospora (123) — Halomonas (122) — Streptococcus (117) — Bacillus (109) — Hymenobacter (107) — Bifidobacterium (101) — Pedobacter (101)
Rhizobium (96) — Shewanella (95) — Paraburkholderia (93) — Deinococcus (89) — Amycolatopsis (87) — Acinetobacter (81) — Paracoccus (81) — Mucilaginibacter (79) — Actinomadura (78) — Lysobacter (71) — Bradyrhizobium (70) — Arthrobacter (68) — Leptospira (68) — Sphingobacterium (68) — Pseudonocardia (67) — Nonomuraea (66) — Staphylococcus (66) — Legionella (65) — Mesorhizobium (63) — Novosphingobium (63) — Enterococcus (62) — Massilia (61) — Marinobacter (59) — Rhodococcus (55) — Actinoplanes (54) — Helicobacter (53) — Gordonia (52) — Roseomonas (52) — Bacteroides (51) — Algoriphagus (50) — Mycoplasma (50)
Methylobacterium (49) — Pseudoalteromonas (49) — Winogradskyella (49) — Nocardiopsis (47) — Chitinophaga (46) — Lactobacillus (46) — Pontibacter (46) — Sphingobium (46) — Spirosoma (46) — Campylobacter (45) — Mycoplasmopsis (44) — Psychrobacter (44) — Agromyces (43) — Borrelia (42) — Bartonella (39) — Marinomonas (39) — Cellulomonas (38) — Halorubrum (38) — Photobacterium (38) — Spiroplasma (38) — Thermococcus (38) — Brevibacterium (37) — Saccharopolyspora (37) — Alteromonas (36) — Brevundimonas (36) — Burkholderia (36) — Devosia (35) — Acetobacter (34) — Arcobacter (34) — Cohnella (34) — Companilactobacillus (34) — Dyella (34) — Kitasatospora (34) — Leucobacter (34) — Roseovarius (34) — Tenacibaculum (34) — Virgibacillus (34) — Actinomyces (33) — Cryobacterium (33) — Kribbella (33) — Xanthomonas (33) — Aeromonas (32) — Brevibacillus (31) — Neisseria (31) — Polynucleobacter (31) — Luteimonas (30) — Maribacter (30) — Qipengyuania (30) — Streptosporangium (30) — Alicyclobacillus (29) — Aquimarina (29) — Lacticaseibacillus (29) — Levilactobacillus (29) — Microbulbifer (29) — Oceanobacillus (29) — Polaribacter (29) — Rickettsia (29) — Caballeronia (28) — Dyadobacter (28) — Glycomyces (28) — Listeria (28) — Pandoraea (28) — Rheinheimera (28) — Treponema (28) — Eubacterium (27) — Limosilactobacillus (27) — Prevotella (27) — Xenorhabdus (27) — Brachybacterium (26) — Kocuria (26) — Nesterenkonia (26) — Yersinia (26) — Aeromicrobium (25) — Brucella (25) — Comamonas (25) — Halobacillus (25) — Lactococcus (25) — Methanobacterium (25) — Thermus (25) — Undibacterium (25) — Anoxybacillus (24) — Azospirillum (24) — Neobacillus (24) — Planococcus (24) — Sulfitobacter (24) — Colwellia (23) — Enterobacter (23) — Lentzea (23) — Microvirga (23) — Photorhabdus (23) — Saccharothrix (23) — Serratia (23) — Blautia (22) — Natrinema (22) — Sphingopyxis (22) — Vagococcus (22) — Demequina (21) — Lysinibacillus (21) — Moraxella (21) — Peptoniphilus (21) — Pseudoxanthomonas (21) — Ruegeria (21) — Achromobacter (20) — Cupriavidus (20) — Ensifer (20) — Geodermatophilus (20) — Gracilibacillus (20) — Lentibacillus (20) — Marinobacterium (20) — Metabacillus (20) — Microlunatus (20) — Pantoea (20) — Pectobacterium (20) — Peribacillus (20) — Rhodovulum (20) — Thalassotalea (20) — Weissella (20) — Acidovorax (19) — Actinokineospora (19) — Agrobacterium (19) — Christiangramia (19) — Desulfovibrio (19) — Duganella (19) — Exiguobacterium (19) — Fusobacterium (19) — Komagataeibacter (19) — Lentilactobacillus (19) — Ramlibacter (19) — Rhodanobacter (19) — Veillonella (19) — Actinobacillus (18) — Aequorivita (18) — Alcanivorax (18) — Ancylobacter (18) — Erwinia (18) — Geomonas (18) — Lactiplantibacillus (18) — Ligilactobacillus (18) — Metamycoplasma (18) — Porphyromonas (18) — Pseudidiomarina (18) — Salinicoccus (18) — Aureimonas (17) — Citrobacter (17) — Gemmobacter (17) — Gluconobacter (17) — Klebsiella (17) — Leuconostoc (17) — Myroides (17) — Phenylobacterium (17) — Stenotrophomonas (17) — Acholeplasma (16) — Actinoallomurus (16) — Arenimonas (16) — Cytobacillus (16) — Dactylosporangium (16) — Erythrobacter (16) — Frankia (16) — Hydrogenophaga (16) — Psychroflexus (16) — Sporosarcina (16) — Tsukamurella (16) — Actinomycetospora (15) — Algibacter (15) — Anaerococcus (15) — Bordetella (15) — Halopseudomonas (15) — Halorussus (15) — Kineococcus (15) — Methanobrevibacter (15) — Noviherbaspirillum (15) — Psychromonas (15) — Secundilactobacillus (15) — Thermoanaerobacter (15) — Blastococcus (14) — Chromobacterium (14) — Georgenia (14) — Haemophilus (14) — Megasphaera (14) — Mesobacillus (14) — Methanosarcina (14) — Ornithinimicrobium (14) — Phocaeicola (14) — Phyllobacterium (14) — Prauserella (14) — Promicromonospora (14) — Pseudarthrobacter (14) — Rhodobacter (14) — Roseateles (14) — Roseibium (14) — Saccharomonospora (14) — Streptacidiphilus (14) — Tessaracoccus (14) — Aliidiomarina (13) — Arenibacter (13) — Aurantiacibacter (13) — Bizionia (13) — Haloferax (13) — Herbaspirillum (13) — Idiomarina (13) — Liquorilactobacillus (13) — Microbispora (13) — Niabella (13) — Nonlabens (13) — Pasteurella (13) — Pseudodesulfovibrio (13) — Pseudooceanicola (13) — Rahnella (13) — Salegentibacter (13) — Salinicola (13) — Selenomonas (13) — Sphaerisporangium (13) — Sporolactobacillus (13) — Williamsia (13) — Actinopolyspora (12) — Aerococcus (12) — Bosea (12) — Capnocytophaga (12) — Carnobacterium (12) — Caulobacter (12) — Chlamydia (12) — Corallococcus (12) — Desulfosporosinus (12) — Dickeya (12) — Dietzia (12) — Fictibacillus (12) — Fructobacillus (12) — Geobacillus (12) — Geobacter (12) — Gluconacetobacter (12) — Haloarcula (12) — Hyphomonas (12) — Jannaschia (12) — Lacinutrix (12) — Leifsonia (12) — Lewinella (12) — Lutibacter (12) — Macrococcus (12) — Mesoplasma (12) — Nakamurella (12) — Parabacteroides (12) — Salinimicrobium (12) — Schaalia (12) — Segatella (12) — Shimia (12) — Thalassospira (12) — Thauera (12) — Thermomonas (12) — Thiomicrorhabdus (12) — Ureibacillus (12) — Variovorax (12) — Vogesella (12) — Actinophytocola (11) — Adhaeribacter (11) — Alistipes (11) — Apilactobacillus (11) — Brenneria (11) — Cellvibrio (11) — Ferrimonas (11) — Glutamicibacter (11) — Granulicella (11) — Hyphomicrobium (11) — Jiangella (11) — Luteolibacter (11) — Mesomycoplasma (11) — Methanoculleus (11) — Methylophaga (11) — Methylorubrum (11) — Modestobacter (11) — Nitratireductor (11) — Paraglaciecola (11) — Pediococcus (11) — Polyangium (11) — Providencia (11) — Ralstonia (11) — Rothia (11) — Rubrobacter (11) — Sphingorhabdus (11) — Spirochaeta (11) — Terrimonas (11) — Trinickia (11) — Agrococcus (10) — Alkalibacterium (10) — Alkaliphilus (10) — Allorhizobium (10) — Altererythrobacter (10) — Arcanobacterium (10) — Aromatoleum (10) — Asticcacaulis (10) — Celeribacter (10) — Clavibacter (10) — Croceicoccus (10) — Cyclobacterium (10) — Endozoicomonas (10) — Fructilactobacillus (10) — Fulvivirga (10) — Gemella (10) — Halalkalibacter (10) — Halanaerobium (10) — Halobellus (10) — Halococcus (10) — Heyndrickxia (10) — Hoylesella (10) — Janibacter (10) — Jeotgalicoccus (10) — Kaistia (10) — Kangiella (10) — Kibdelosporangium (10) — Kushneria (10) — Magnetospirillum (10) — Mesonia (10) — Methanolobus (10) — Methylomonas (10) — Micrococcus (10) — Myxococcus (10) — Ornithinibacillus (10) — Parapedobacter (10) — Priestia (10) — Proteus (10) — Rhodopseudomonas (10) — Rufibacter (10) — Ruminococcus (10) — Salipiger (10) — Shinella (10) — Sinomonas (10) — Streptomonospora (10) — Sulfurimonas (10) — Terrabacter (10) — Thioalkalivibrio (10) — Thiothrix (10) — Tsuneonella (10) — Tumebacillus (10)