''Intrasporangium calvum'' is a species of

Gram positive In bacteriology, gram-positive bacteria are bacteria that give a positive result in the Gram stain test, which is traditionally used to quickly classify bacteria into two broad categories according to their type of cell wall. Gram-positive bact ...

, aerobic,

endospore An endospore is a dormant, tough, and non-reproductive structure produced by some bacteria in the phylum Bacillota. The name "endospore" is suggestive of a spore or seed-like form (''endo'' means 'within'), but it is not a true spore (i.e., no ...

-forming

bacteria Bacteria (; singular: bacterium) are ubiquitous, mostly free-living organisms often consisting of one biological cell. They constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria were among ...

. The species was initially isolated from air in a school dining room in the

Soviet Union The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, it was nominally a federal union of fifteen national ...

. The species was first described in 1967, and was the first and only species in the genus ''

Intrasporangium ''Intrasporangium'' is a genus of Gram positive, nonmotile, endospore-forming bacteria. The genus name refers to the ability to form sporangia intercalary in the mycelial hyphae. The family Intrasporangiaceae is named after the genus, and ''Intr ...

'' until 2012. ''I. calvum'' can grow in the 20-40 °C range, and can grow in pH 6.0-8.0.

References

{{Taxonbar, from=Q21277220 Intrasporangiaceae Bacteria described in 1967