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: 5.26 species
Median: 2.00 species
Mode: 1 species
Streptomyces (705)
Pseudomonas (310) — Paenibacillus (286) — Flavobacterium (270) — Mycobacterium (195) — Clostridium (159) — Sphingomonas (152) — Nocardioides (143) — Vibrio (142) — Corynebacterium (140) — Chryseobacterium (136) — Microbacterium (129) — Nocardia (124) — Micromonospora (122) — Halomonas (120) — Streptococcus (114) — Bacillus (102) — Hymenobacter (101) — Bifidobacterium (100)
Pedobacter (99) — Paraburkholderia (93) — Deinococcus (89) — Amycolatopsis (86) — Rhizobium (86) — Shewanella (82) — Actinomadura (78) — Mucilaginibacter (78) — Paracoccus (78) — Acinetobacter (76) — Lysobacter (70) — Bradyrhizobium (68) — Leptospira (68) — Sphingobacterium (68) — Pseudonocardia (67) — Nonomuraea (66) — Legionella (65) — Staphylococcus (63) — Enterococcus (62) — Arthrobacter (61) — Massilia (61) — Mesorhizobium (61) — Novosphingobium (58) — Prevotella (58) — Marinobacter (57) — Rhodococcus (53) — Gordonia (51) — Helicobacter (51) — Actinoplanes (50) — Mycoplasma (50) — Roseomonas (50)
Algoriphagus (49) — Bacteroides (49) — Methylobacterium (49) — Pseudoalteromonas (49) — Winogradskyella (46) — Nocardiopsis (45) — Chitinophaga (44) — Lactobacillus (44) — Mycoplasmopsis (44) — Psychrobacter (44) — Spirosoma (44) — Campylobacter (43) — Sphingobium (43) — Agromyces (42) — Borrelia (42) — Pontibacter (42) — Bartonella (38) — Halorubrum (38) — Marinomonas (38) — Spiroplasma (38) — Photobacterium (37) — Saccharopolyspora (37) — Thermococcus (37) — Brevibacterium (36) — Muricauda (36) — Xanthomonas (36) — Alteromonas (35) — Cellulomonas (35) — Acetobacter (34) — Brevundimonas (34) — Burkholderia (34) — Cohnella (34) — Companilactobacillus (34) — Actinomyces (33) — Arcobacter (33) — Devosia (33) — Kitasatospora (33) — Kribbella (33) — Tenacibaculum (33) — Virgibacillus (33) — Roseovarius (32) — Aeromonas (31) — Leucobacter (31) — Polynucleobacter (31) — Brevibacillus (30) — Streptosporangium (30) — Alicyclobacillus (29) — Aquimarina (29) — Dyella (29) — Maribacter (29) — Neisseria (29) — Oceanobacillus (29) — Polaribacter (29) — Qipengyuania (29) — Rickettsia (29) — Treponema (29) — Caballeronia (28) — Glycomyces (28) — Levilactobacillus (28) — Listeria (28) — Pandoraea (28) — Eubacterium (27) — Lacticaseibacillus (27) — Luteimonas (27) — Rheinheimera (27) — Xenorhabdus (27) — Kocuria (26) — Nesterenkonia (26) — Yersinia (26) — Brachybacterium (25) — Brucella (25) — Methanobacterium (25) — Microbulbifer (25) — Undibacterium (25) — Anoxybacillus (24) — Azospirillum (24) — Comamonas (24) — Dyadobacter (24) — Limosilactobacillus (24) — Planococcus (24) — Sulfitobacter (24) — Colwellia (23) — Lentzea (23) — Saccharothrix (23) — Serratia (23) — Aeromicrobium (22) — Enterobacter (22) — Halobacillus (22) — Lactococcus (22) — Photorhabdus (22) — Blautia (21) — Demequina (21) — Erwinia (21) — Lysinibacillus (21) — Microvirga (21) — Pseudoxanthomonas (21) — Achromobacter (20) — Acidovorax (20) — Cupriavidus (20) — Desulfovibrio (20) — Ensifer (20) — Geodermatophilus (20) — Microlunatus (20) — Moraxella (20) — Neobacillus (20) — Pectobacterium (20) — Peptoniphilus (20) — Rhodovulum (20) — Sphingopyxis (20) — Thalassotalea (20) — Thermus (20) — Actinokineospora (19) — Exiguobacterium (19) — Fusobacterium (19) — Gramella (19) — Komagataeibacter (19) — Lentibacillus (19) — Lentilactobacillus (19) — Marinobacterium (19) — Metabacillus (19) — Pantoea (19) — Rhodanobacter (19) — Ruegeria (19) — Vagococcus (19) — Weissella (19) — Actinobacillus (18) — Metamycoplasma (18) — Peribacillus (18) — Porphyromonas (18) — Salinicoccus (18) — Aureimonas (17) — Duganella (17) — Gemmobacter (17) — Gluconobacter (17) — Gracilibacillus (17) — Lactiplantibacillus (17) — Leuconostoc (17) — Ligilactobacillus (17) — Natrinema (17) — Phenylobacterium (17) — Acholeplasma (16) — Actinoallomurus (16) — Aequorivita (16) — Agrobacterium (16) — Alcanivorax (16) — Arenimonas (16) — Citrobacter (16) — Dactylosporangium (16) — Geomonas (16) — Hydrogenophaga (16) — Myroides (16) — Pseudidiomarina (16) — Psychroflexus (16) — Sporosarcina (16) — Tsukamurella (16) — Veillonella (16) — Actinomycetospora (15) — Bordetella (15) — Erythrobacter (15) — Halopseudomonas (15) — Kineococcus (15) — Methanobrevibacter (15) — Noviherbaspirillum (15) — Psychromonas (15) — Rhodobacter (15) — Secundilactobacillus (15) — Thermoanaerobacter (15) — Algibacter (14) — Anaerococcus (14) — Chromobacterium (14) — Cryobacterium (14) — Haemophilus (14) — Idiomarina (14) — Marmoricola (14) — Megasphaera (14) — Mesobacillus (14) — Methanosarcina (14) — Ornithinimicrobium (14) — Phyllobacterium (14) — Prauserella (14) — Promicromonospora (14) — Pseudarthrobacter (14) — Ramlibacter (14) — Roseibium (14) — Saccharomonospora (14) — Streptacidiphilus (14) — Tessaracoccus (14) — Arenibacter (13) — Aurantiacibacter (13) — Bizionia (13) — Cytobacillus (13) — Frankia (13) — Georgenia (13) — Haloferax (13) — Herbaspirillum (13) — Klebsiella (13) — Liquorilactobacillus (13) — Microbispora (13) — Niabella (13) — Nonlabens (13) — Pasteurella (13) — Phocaeicola (13) — Pseudooceanicola (13) — Rahnella (13) — Salegentibacter (13) — Salinicola (13) — Williamsia (13) — Actinopolyspora (12) — Aliidiomarina (12) — Carnobacterium (12) — Caulobacter (12) — Corallococcus (12) — Desulfosporosinus (12) — Dickeya (12) — Geobacillus (12) — Gluconacetobacter (12) — Jannaschia (12) — Lacinutrix (12) — Leifsonia (12) — Lewinella (12) — Lutibacter (12) — Macrococcus (12) — Mesoplasma (12) — Nakamurella (12) — Pseudodesulfovibrio (12) — Schaalia (12) — Selenomonas (12) — Sphaerisporangium (12) — Sporolactobacillus (12) — Thalassospira (12) — Thauera (12) — Ureibacillus (12) — Variovorax (12) — Adhaeribacter (11) — Alistipes (11) — Ancylobacter (11) — Apilactobacillus (11) — Aquabacterium (11) — Blastococcus (11) — Bosea (11) — Capnocytophaga (11) — Cellvibrio (11) — Chlamydia (11) — Dietzia (11) — Ferrimonas (11) — Fictibacillus (11) — Fructobacillus (11) — Glutamicibacter (11) — Granulicella (11) — Haloarcula (11) — Hyphomicrobium (11) — Hyphomonas (11) — Jiangella (11) — Luteolibacter (11) — Mesomycoplasma (11) — Methanoculleus (11) — Methylophaga (11) — Methylorubrum (11) — Modestobacter (11) — Parabacteroides (11) — Paraglaciecola (11) — Pediococcus (11) — Providencia (11) — Rothia (11) — Rubrobacter (11) — Shimia (11) — Sphingorhabdus (11) — Spirochaeta (11) — Streptomonospora (11) — Thiomicrorhabdus (11) — Actinophytocola (10) — Agrococcus (10) — Alkalibacterium (10) — Alkaliphilus (10) — Altererythrobacter (10) — Arcanobacterium (10) — Aromatoleum (10) — Celeribacter (10) — Croceicoccus (10) — Cyclobacterium (10) — Endozoicomonas (10) — Geobacter (10) — Halalkalibacter (10) — Halanaerobium (10) — Halobellus (10) — Halococcus (10) — Jeotgalicoccus (10) — Kangiella (10) — Kibdelosporangium (10) — Kushneria (10) — Mesonia (10) — Methanolobus (10) — Nitratireductor (10) — Ornithinibacillus (10) — Priestia (10) — Rhodopseudomonas (10) — Ruminococcus (10) — Salinimicrobium (10) — Sinomonas (10) — Terrabacter (10) — Terrimonas (10) — Thermomonas (10) — Thioalkalivibrio (10) — Vogesella (10)