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: 5.19 species
Median: 2.00 species
Mode: 1 species
Streptomyces (695)
Pseudomonas (297) — Paenibacillus (277) — Flavobacterium (263) — Mycobacterium (194) — Clostridium (159) — Sphingomonas (145) — Vibrio (137) — Corynebacterium (136) — Nocardioides (136) — Chryseobacterium (133) — Microbacterium (129) — Nocardia (122) — Halomonas (116) — Streptococcus (113) — Micromonospora (110) — Bacillus (104)
Hymenobacter (99) — Bifidobacterium (98) — Pedobacter (97) — Paraburkholderia (91) — Rhizobium (89) — Amycolatopsis (85) — Deinococcus (85) — Shewanella (76) — Actinomadura (75) — Paracoccus (75) — Acinetobacter (74) — Mucilaginibacter (71) — Leptospira (67) — Lysobacter (66) — Pseudonocardia (66) — Nonomuraea (65) — Sphingobacterium (65) — Bradyrhizobium (63) — Legionella (63) — Staphylococcus (62) — Enterococcus (61) — Massilia (59) — Prevotella (59) — Arthrobacter (58) — Mesorhizobium (58) — Novosphingobium (56) — Marinobacter (55) — Actinoplanes (50) — Pseudoalteromonas (50) — Rhodococcus (50) — Roseomonas (50)
Helicobacter (49) — Mycoplasma (49) — Algoriphagus (48) — Methylobacterium (48) — Gordonia (47) — Chitinophaga (44) — Lactobacillus (44) — Mycoplasmopsis (44) — Nocardiopsis (44) — Spirosoma (44) — Winogradskyella (44) — Psychrobacter (43) — Sphingobium (43) — Borrelia (42) — Bacteroides (41) — Campylobacter (41) — Pontibacter (41) — Agromyces (40) — Bartonella (38) — Halorubrum (38) — Spiroplasma (38) — Marinomonas (37) — Photobacterium (37) — Thermococcus (37) — Brevibacterium (36) — Saccharopolyspora (36) — Alteromonas (35) — Companilactobacillus (35) — Muricauda (35) — Brevundimonas (34) — Kitasatospora (34) — Acetobacter (33) — Arcobacter (33) — Burkholderia (33) — Cohnella (33) — Kribbella (33) — Virgibacillus (33) — Actinomyces (32) — Devosia (32) — Aeromonas (31) — Cellulomonas (31) — Roseovarius (31) — Tenacibaculum (31) — Xanthomonas (31) — Leucobacter (30) — Streptosporangium (30) — Treponema (30) — Alicyclobacillus (29) — Brevibacillus (29) — Dyella (29) — Maribacter (29) — Neisseria (29) — Rickettsia (29) — Caballeronia (28) — Oceanobacillus (28) — Pandoraea (28) — Aquimarina (27) — Levilactobacillus (27) — Listeria (27) — Rheinheimera (27) — Xenorhabdus (27) — Eubacterium (26) — Glycomyces (26) — Kocuria (26) — Lacticaseibacillus (26) — Luteimonas (26) — Nesterenkonia (26) — Yersinia (26) — Brucella (25) — Microbulbifer (25) — Polaribacter (25) — Undibacterium (25) — Anoxybacillus (24) — Brachybacterium (24) — Comamonas (24) — Dyadobacter (24) — Limosilactobacillus (24) — Methanobacterium (24) — Planococcus (24) — Azospirillum (23) — Lentzea (23) — Serratia (23) — Sulfitobacter (23) — Colwellia (22) — Enterobacter (22) — Halobacillus (22) — Lactococcus (22) — Aeromicrobium (21) — Demequina (21) — Erwinia (21) — Lysinibacillus (21) — Photorhabdus (21) — Pseudoxanthomonas (21) — Saccharothrix (21) — Achromobacter (20) — Desulfovibrio (20) — Ensifer (20) — Geodermatophilus (20) — Microlunatus (20) — Pectobacterium (20) — Peptoniphilus (20) — Rhodovulum (20) — Sphingopyxis (20) — Thermus (20) — Acidovorax (19) — Actinokineospora (19) — Blautia (19) — Cupriavidus (19) — Exiguobacterium (19) — Lentibacillus (19) — Marinobacterium (19) — Microvirga (19) — Rhodanobacter (19) — Thalassotalea (19) — Weissella (19) — Actinobacillus (18) — Fusobacterium (18) — Gramella (18) — Lentilactobacillus (18) — Metamycoplasma (18) — Moraxella (18) — Neobacillus (18) — Pantoea (18) — Porphyromonas (18) — Ruegeria (18) — Salinicoccus (18) — Vagococcus (18) — Aureimonas (17) — Gemmobacter (17) — Gluconobacter (17) — Gracilibacillus (17) — Lactiplantibacillus (17) — Leuconostoc (17) — Metabacillus (17) — Peribacillus (17) — Polynucleobacter (17) — Acholeplasma (16) — Actinoallomurus (16) — Aequorivita (16) — Alcanivorax (16) — Arenimonas (16) — Citrobacter (16) — Dactylosporangium (16) — Hydrogenophaga (16) — Ligilactobacillus (16) — Myroides (16) — Phenylobacterium (16) — Pseudidiomarina (16) — Sporosarcina (16) — Stenotrophomonas (16) — Streptacidiphilus (16) — Tsukamurella (16) — Algibacter (15) — Bordetella (15) — Duganella (15) — Kineococcus (15) — Komagataeibacter (15) — Methanobrevibacter (15) — Natrinema (15) — Noviherbaspirillum (15) — Psychromonas (15) — Rhodobacter (15) — Thermoanaerobacter (15) — Veillonella (15) — Actinomycetospora (14) — Anaerococcus (14) — Cryobacterium (14) — Haemophilus (14) — Halopseudomonas (14) — Idiomarina (14) — Marmoricola (14) — Mesobacillus (14) — Methanosarcina (14) — Ornithinimicrobium (14) — Prauserella (14) — Promicromonospora (14) — Roseibium (14) — Saccharomonospora (14) — Secundilactobacillus (14) — Agrobacterium (13) — Alkalihalobacillus (13) — Arenibacter (13) — Bizionia (13) — Geomonas (13) — Georgenia (13) — Haloferax (13) — Herbaspirillum (13) — Klebsiella (13) — Liquorilactobacillus (13) — Megasphaera (13) — Nonlabens (13) — Pasteurella (13) — Phocaeicola (13) — Phyllobacterium (13) — Pseudarthrobacter (13) — Pseudooceanicola (13) — Qipengyuania (13) — Rahnella (13) — Ramlibacter (13) — Salinicola (13) — Tessaracoccus (13) — Actinopolyspora (12) — Aliidiomarina (12) — Aurantiacibacter (12) — Carnobacterium (12) — Caulobacter (12) — Chromobacterium (12) — Cytobacillus (12) — Desulfosporosinus (12) — Dickeya (12) — Frankia (12) — Geobacillus (12) — Gluconacetobacter (12) — Jannaschia (12) — Lacinutrix (12) — Leifsonia (12) — Lewinella (12) — Lutibacter (12) — Macrococcus (12) — Mesoplasma (12) — Microbispora (12) — Nakamurella (12) — Niabella (12) — Psychroflexus (12) — Salegentibacter (12) — Schaalia (12) — Selenomonas (12) — Sphaerisporangium (12) — Sporolactobacillus (12) — Thalassospira (12) — Thauera (12) — Ureibacillus (12) — Variovorax (12) — Williamsia (12) — Adhaeribacter (11) — Ancylobacter (11) — Aquabacterium (11) — Bosea (11) — Capnocytophaga (11) — Cellvibrio (11) — Chlamydia (11) — Corallococcus (11) — Dietzia (11) — Erythrobacter (11) — Ferrimonas (11) — Fictibacillus (11) — Glutamicibacter (11) — Granulicella (11) — Haloarcula (11) — Hyphomicrobium (11) — Hyphomonas (11) — Jiangella (11) — Mesomycoplasma (11) — Methanoculleus (11) — Methylorubrum (11) — Modestobacter (11) — Paraglaciecola (11) — Pediococcus (11) — Pseudodesulfovibrio (11) — Rothia (11) — Rubrobacter (11) — Shimia (11) — Sphingorhabdus (11) — Spirochaeta (11) — Streptomonospora (11) — Thiomicrorhabdus (11) — Actinophytocola (10) — Agrococcus (10) — Alistipes (10) — Alkalibacterium (10) — Altererythrobacter (10) — Aromatoleum (10) — Blastococcus (10) — Celeribacter (10) — Cyclobacterium (10) — Endozoicomonas (10) — Geobacter (10) — Halanaerobium (10) — Halococcus (10) — Jeotgalicoccus (10) — Kibdelosporangium (10) — Kushneria (10) — Luteolibacter (10) — Mesonia (10) — Methanolobus (10) — Methylophaga (10) — Nitratireductor (10) — Ornithinibacillus (10) — Parabacteroides (10) — Priestia (10) — Providencia (10) — Rhodopseudomonas (10) — Ruminococcus (10) — Salinimicrobium (10) — Sinomonas (10) — Terrabacter (10) — Terrimonas (10) — Thioalkalivibrio (10) — Vogesella (10)