Sa
, Saccharibacter , Saccharobacter , Saccharococcus , Saccharomonospora
Saccharophagus Ekborg et al., 2005
- Saccharophagus degradans Ekborg et al., 2005
Bacteria → Proteobacteria → Gammaproteobacteria → Alteromonadales → Alteromonadaceae , Saccharopolyspora , Saccharospirillaceae , Saccharospirillum , Saccharothrix , Sagittula , Salana , Salegentibacter , Salicola , Salinibacillus , Salinibacter , Salinibacterium , Salinicoccus , Salinimonas , Salinisphaera , Salinisphaeraceae , Salinisphaerales , Salinispora
Salinivibrio Mellado, Moore, Nieto & Ventosa, 1996
- Salinivibrio costicola
- Salinivibrio costicola subsp. alcaliphilus Romano et al. 2005
- Salinivibrio costicola subsp. costicola (Smith 1938) Mellado et al. 1996
- Salinivibrio costicola subsp. vallismortis Huang et al. 2000
Bacteria → Proteobacteria → Gammaproteobacteria → Vibrionales → Vibrionaceae , Salipiger , Salmonella , Samsonia , Sandaracinobacter , Sandarakinorhabdus , Sandarakinotalea , Sanguibacter , Sanguibacteraceae , Saprospira , Saprospiraceae , Sarcina
Sc
, Scardovia , Schineria , Schlegelella , Schwartzia
Se
, Sebaldella , Sedimentibacter , Sediminicola , Segniliparaceae , Segniliparus , Seinonella , Sejongia , Selenihalanaerobacter , Selenomonas , Seliberia , Serinicoccus , Serpens , Serpulina , Serpulinaceae , Serratia
Sh
, Shewanella , Shewanellaceae , Shigella , Shimia , Shinella , Shuttleworthia
Si
, Silanimonas , Silicibacter , Silvimonas , Simkania , Simkaniaceae , Simonsiella , Simplicispira , Sinococcus , Sinorhizobium
Sk
, Skermanella , Skermania
Sl
Slackia Wade et al., 1999
- Slackia equolifaciens Jin et al., 2010
- Slackia exigua (Poco et al., 1996) Wade et al., 1999
- Slackia faecicanis Lawson et al., 2005
- Slackia heliotrinireducens (Lanigan, 1983) Wade et al., 1999
- Slackia isoflavoniconvertens Matthies et al., 2009
- Slackia piriformis Nagai et al., 2010
Bacteria → Actinobacteria → Coriobacteriales → Coriobacteriaceae
Sm
, Smithella
Sn
Sneathia Collins et al., 2002
- Sneathia sanguinegens Collins, Hoyles, Tornqvist, von Essen & Falsen, 2002
Bacteria → Fusobacteria → Fusobacteria → Fusobacteriales → Leptotrichiaceae
Snowella Elenkin, 1938
- Snowella arachnoidea Komárek & Hindák
- Snowella atomus Komárek & Hindák
- Snowella fennica J. Komárek & J. Komárková-Legnerová
- Snowella lacustris (Chodat) Komárek & Hindák
- Snowella litoralis (Häyrén) Komárek & Hindák
- Snowella rosea (Snow) Elenkin
- Snowella septentrionalis Komárek & Hindák
Bacteria → Cyanobacteria → Cyanophyceae → Synechococcales → Merismopediaceae → Gomphosphaerioideae
So
, Sodalis , Soehngenia , Solirubrobacter , Solobacterium , Sorangium
Sp
, Sphaerobacter , Sphaerobacteraceae , Sphaerobacterales , Sphaerotilus , Sphingobacteria , Sphingobacteriaceae , Sphingobacteriales , Sphingobacterium , Sphingobium , Sphingomonadaceae , Sphingomonadales , Sphingomonas , Sphingopyxis , Sphingosinicella , Spirillaceae , Spirilliplanes , Spirillospora , Spirillum , Spirochaeta , Spirochaetaceae , Spirochaetales , Spirochaetes , Spirochaetes , Spiroplasma , Spiroplasmataceae , Spirosoma , Sporacetigenium , Sporanaerobacter , Sporichthya , Sporichthyaceae , Sporobacter , Sporobacterium , Sporocytophaga , Sporohalobacter , Sporolactobacillaceae , Sporolactobacillus , Sporomusa , Sporosarcina , Sporotomaculum
St
, Stackebrandtia , Staleya , Stanierella , Staphylococcaceae , Staphylococcus , Stappia , Starkeya , Stella , Stenothermobacter , Stenotrophomonas , Sterolibacterium , Stigmatella , Streptacidiphilus , Streptoalloteichus , Streptobacillus , Streptococcaceae , Streptococcus , Streptomonospora , Streptomyces , Streptomycetaceae , Streptosporangiaceae , Streptosporangium , Streptoverticillium
Su
, Subdoligranulum , Subsaxibacter , Subsaximicrobium , Subtercola , Succiniclasticum , Succinimonas , Succinispira , Succinivibrio , Succinivibrionaceae , Sulfitobacter , Sulfobacillus , Sulfuricurvum , Sulfurihydrogenibium , Sulfurimonas , Sulfurivirga , Sulfurospirillum , Sulfurovum , Sutterella , Suttonella
Sw
, Swaminathania
Sy
, Symbiobacterium , Symbiotes
Porodica Symphyonemataceae Hoffman, Komárek & Kastovsky
- Adrianema De Toni f., 1936
- Brachytrichia Zanardini ex Bornet & Thuret, 1886
- Herpyzonema Weber-van Bosse, 1913
- Iphinoë V.Lamprinou & A.Pantazidou, 2011
- Iyengariella Desikachary, 1953
- Loriellopsis Hernández-Mariné & Canals, 2011
- Mastigocladopsis Iyengar & Desikachary, 1946
- Parechymorpha Tseng & Hua, 1984
- Parenchymorpha C.K.Tseng & M.Hua, 1984
- Symphyonema C.-C.Jao, 1944
- Symphyonemopsis G.L.Tiwari & A.K.Mitra, 1969
- Voukiella Ercegovic, 1925
Bacteria → Cyanobacteria → Cyanophyceae → Nostocales , Synergistes , Syntrophaceae , Syntrophobacter , Syntrophobacteraceae , Syntrophobacterales , Syntrophobotulus , Syntrophococcus , Syntrophomonadaceae , Syntrophomonas , Syntrophospora , Syntrophothermus , Syntrophus