Largest genera

Introduction

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.

Statistics

Average: 5.17 species

Median: 2.00 species

Mode: 1 species

Tier 1: ≥500 species

Streptomyces (671)

Tier 2: 100-499 species

Paenibacillus (263) — Pseudomonas (259) — Flavobacterium (245) — Mycobacterium (194) — Clostridium (151) — Sphingomonas (136) — Vibrio (132) — Corynebacterium (128) — Nocardioides (124) — Microbacterium (122) — Chryseobacterium (120) — Nocardia (118) — Halomonas (111) — Streptococcus (110) — Micromonospora (106)

Tier 3: 50-99 species

Bacillus (97) — Rhizobium (92) — Pedobacter (91) — Hymenobacter (90) — Bifidobacterium (86) — Deinococcus (84) — Amycolatopsis (83) — Paraburkholderia (79) — Paracoccus (74) — Shewanella (74) — Actinomadura (72) — Mucilaginibacter (70) — Acinetobacter (69) — Nonomuraea (64) — Bradyrhizobium (63) — Leptospira (63) — Lysobacter (63) — Pseudonocardia (63) — Legionella (62) — Sphingobacterium (60) — Enterococcus (59) — Mesorhizobium (59) — Staphylococcus (57) — Prevotella (55) — Arthrobacter (54) — Marinobacter (54) — Massilia (54) — Novosphingobium (52) — Rhodococcus (52)

Tier 4: 10-49 species

Helicobacter (48) — Pseudoalteromonas (48) — Actinoplanes (47) — Methylobacterium (47) — Algoriphagus (46) — Gordonia (45) — Mycoplasma (45) — Nocardiopsis (45) — Roseomonas (45) — Mycoplasmopsis (44) — Winogradskyella (44) — Sphingobium (43) — Borrelia (42) — Spirosoma (42) — Bacteroides (41) — Chitinophaga (41) — Lactobacillus (41) — Psychrobacter (41) — Alkalihalobacillus (39) — Spiroplasma (38) — Agromyces (37) — Bartonella (37) — Halorubrum (37) — Pontibacter (37) — Marinomonas (36) — Photobacterium (36) — Brevibacterium (35) — Companilactobacillus (35) — Campylobacter (34) — Saccharopolyspora (34) — Virgibacillus (34) — Burkholderia (33) — Kitasatospora (33) — Kribbella (33) — Thermococcus (33) — Acetobacter (32) — Brevundimonas (32) — Cohnella (32) — Aeromonas (31) — Cellulomonas (31) — Roseovarius (31) — Tenacibaculum (31) — Xanthomonas (31) — Actinomyces (29) — Maribacter (29) — Neisseria (29) — Rickettsia (29) — Streptosporangium (29) — Treponema (29) — Alteromonas (28) — Arcobacter (28) — Caballeronia (28) — Muricauda (28) — Pandoraea (28) — Aquimarina (27) — Brevibacillus (27) — Dyella (27) — Devosia (26) — Eubacterium (26) — Glycomyces (26) — Kocuria (26) — Listeria (26) — Oceanobacillus (26) — Rheinheimera (26) — Xenorhabdus (26) — Yersinia (26) — Brucella (25) — Desulfovibrio (25) — Leucobacter (25) — Microbulbifer (25) — Polaribacter (25) — Alicyclobacillus (24) — Lacticaseibacillus (24) — Levilactobacillus (24) — Limosilactobacillus (24) — Methanobacterium (24) — Nesterenkonia (24) — Planococcus (24) — Sulfitobacter (24) — Weissella (24) — Anoxybacillus (23) — Brachybacterium (23) — Comamonas (23) — Lentzea (23) — Luteimonas (23) — Serratia (23) — Azospirillum (22) — Colwellia (22) — Dyadobacter (22) — Lactococcus (22) — Aeromicrobium (21) — Demequina (21) — Halobacillus (21) — Lysinibacillus (21) — Pseudoxanthomonas (21) — Saccharothrix (21) — Achromobacter (20) — Actinokineospora (20) — Ensifer (20) — Enterobacter (20) — Erwinia (20) — Geodermatophilus (20) — Microlunatus (20) — Photorhabdus (20) — Rhodovulum (20) — Sphingopyxis (20) — Acidovorax (19) — Komagataeibacter (19) — Thalassotalea (19) — Actinobacillus (18) — Cupriavidus (18) — Gramella (18) — Lentibacillus (18) — Marinobacterium (18) — Metamycoplasma (18) — Microvirga (18) — Moraxella (18) — Pantoea (18) — Pectobacterium (18) — Peptoniphilus (18) — Porphyromonas (18) — Rhodanobacter (18) — Salinicoccus (18) — Thermus (18) — Exiguobacterium (17) — Gluconobacter (17) — Lactiplantibacillus (17) — Peribacillus (17) — Polynucleobacter (17) — Ruegeria (17) — Acholeplasma (16) — Actinoallomurus (16) — Arenimonas (16) — Citrobacter (16) — Dactylosporangium (16) — Gemmobacter (16) — Gracilibacillus (16) — Hydrogenophaga (16) — Lentilactobacillus (16) — Leuconostoc (16) — Ligilactobacillus (16) — Myroides (16) — Neobacillus (16) — Phenylobacterium (16) — Rhodobacter (16) — Stenotrophomonas (16) — Streptacidiphilus (16) — Tsukamurella (16) — Vagococcus (16) — Aequorivita (15) — Alcanivorax (15) — Algibacter (15) — Aureimonas (15) — Blautia (15) — Bordetella (15) — Cryobacterium (15) — Duganella (15) — Fusobacterium (15) — Kineococcus (15) — Metabacillus (15) — Methanobrevibacter (15) — Prauserella (15) — Pseudidiomarina (15) — Psychromonas (15) — Sphingorhabdus (15) — Sporosarcina (15) — Thermoanaerobacter (15) — Veillonella (15) — Actinomycetospora (14) — Haemophilus (14) — Idiomarina (14) — Marmoricola (14) — Mesobacillus (14) — Methanosarcina (14) — Promicromonospora (14) — Saccharomonospora (14) — Thauera (14) — Undibacterium (14) — Anaerococcus (13) — Bizionia (13) — Cytobacillus (13) — Georgenia (13) — Haloferax (13) — Herbaspirillum (13) — Klebsiella (13) — Liquorilactobacillus (13) — Nonlabens (13) — Noviherbaspirillum (13) — Pasteurella (13) — Roseibium (13) — Salinicola (13) — Tessaracoccus (13) — Actinopolyspora (12) — Altererythrobacter (12) — Arenibacter (12) — Aurantiacibacter (12) — Carnobacterium (12) — Caulobacter (12) — Chromobacterium (12) — Dickeya (12) — Frankia (12) — Geobacillus (12) — Geobacter (12) — Gluconacetobacter (12) — Jannaschia (12) — Lacinutrix (12) — Leifsonia (12) — Lewinella (12) — Lutibacter (12) — Megasphaera (12) — Mesoplasma (12) — Microbispora (12) — Phyllobacterium (12) — Pseudarthrobacter (12) — Pseudooceanicola (12) — Psychroflexus (12) — Qipengyuania (12) — Schaalia (12) — Secundilactobacillus (12) — Sphaerisporangium (12) — Sporolactobacillus (12) — Thalassospira (12) — Ureibacillus (12) — Variovorax (12) — Williamsia (12) — Agrobacterium (11) — Ancylobacter (11) — Bosea (11) — Cellvibrio (11) — Corallococcus (11) — Desulfosporosinus (11) — Dietzia (11) — Erythrobacter (11) — Ferrimonas (11) — Fictibacillus (11) — Glutamicibacter (11) — Granulicella (11) — Haloarcula (11) — Haloterrigena (11) — Hyphomicrobium (11) — Hyphomonas (11) — Jiangella (11) — Macrococcus (11) — Mesomycoplasma (11) — Methanoculleus (11) — Methylorubrum (11) — Modestobacter (11) — Nakamurella (11) — Niabella (11) — Paraglaciecola (11) — Pediococcus (11) — Phocaeicola (11) — Rothia (11) — Rubrobacter (11) — Shimia (11) — Spirochaeta (11) — Streptomonospora (11) — Actinophytocola (10) — Adhaeribacter (10) — Agrococcus (10) — Aliidiomarina (10) — Alistipes (10) — Alkalibacterium (10) — Aromatoleum (10) — Blastococcus (10) — Capnocytophaga (10) — Chlamydia (10) — Cyclobacterium (10) — Endozoicomonas (10) — Halanaerobium (10) — Halococcus (10) — Jeotgalicoccus (10) — Kibdelosporangium (10) — Kushneria (10) — Methanolobus (10) — Methylophaga (10) — Ornithinibacillus (10) — Ornithinimicrobium (10) — Parabacteroides (10) — Priestia (10) — Providencia (10) — Pseudodesulfovibrio (10) — Ramlibacter (10) — Rhodopseudomonas (10) — Salegentibacter (10) — Salinimicrobium (10) — Selenomonas (10) — Sinomonas (10) — Terrabacter (10) — Terrimonas (10) — Thioalkalivibrio (10) — Vogesella (10)