Spirillum

{{Short description|Genus of bacteria}}

{{About|the bacterial genus|spiral-shaped bacteria in general|spiral bacteria}}

{{Italic title}}

{{Automatic taxobox

| image = Spirillen.jpg

| image_caption = Spirillum

| taxon = Spirillum

| authority = Ehrenberg, 1832 emend. Podkopaeva et al., 2009

| subdivision_ranks = Species

| subdivision =

• Spirillum winogradskyi
• Spirillum volutans

}}

Spirillum is a genus

of Gram-negative bacteria in the family Spirillaceae of the Nitrosomonadales of the Betaproteobacteria.Garrity, George M.; Brenner, Don J.; Krieg, Noel R.; Staley, James T. (eds.) (2005). Bergey's Manual of Systematic Bacteriology, Volume Two: The Proteobacteria, Part C: The Alpha-, Beta-, Delta-, and Epsilonproteobacteria. New York, New York: Springer. pp. 354–361. {{ISBN|978-0-387-24145-6}}.{{MeshName|Spirillum}}Podkopaeva (D.), Grabovich (M.), Kuever (J.), Lysenko (A.M.), Tourova (T.P.), Kolganova (T.V.) and Dubinia (G.): Proposal of Spirillum winogradskyi sp. nov., a novel microaerophilic species, an amended description of the genus Spirillum and Request for an Opinion regarding the status of the species Spirillum volutans Ehrenberg 1832. Int. J. Syst. Evol. Microbiol., 2009, 59, 2916-2920. There are two species of Spirillum with validly or effectively published names - Spirillum winogradskyi and Spirillum volutans.{{cite web |url=https://lpsn.dsmz.de/genus/spirillum |title=Spirillum |last1=Jean |first1=Euzeby |publisher=List of Prokaryotic names with Standing in Nomenclature |access-date=November 5, 2014}}

Other "species" classified as Spirillum such as "Spirillum minus", "Spirillum pleomorphum", and "Spirillum pulli" are of uncertain phylogeny and in any case, these are names that have never been validly or effectively published and thus have no standing in nomenclature.{{cite book |last=Krieg |first=Noel |editor1-last=Dworkin |editor1-first=Martin |editor2-last=Falkow |editor2-first=Stanley |editor3-last=Rosenberg |editor3-first=Eugene |editor4-last=Schleifer |editor4-first=Karl-Heinz |editor5-last=Stackebrandt |editor5-first= Erko|date=2006 |title=The Prokaryotes: A Handbook on the Biology of Bacteria, Volume 5 |location=Berlin |publisher=Springer Science & Business Media |chapter=Chapter 3.2.5: The Genus Spirillum |isbn=9780387254951 }}