Micropolyspora is a now defunct genus of bacteria from family Nocardiaceae

Nocardiaceae

The Nocardiaceae are a family of aerobic, non-fastidious, high G+C, Gram-positive actinomycetes that are commonly found in soil and water. Members of this family have been isolated from Antarctic soils...

. Members of this genus were transferred to new genera in families Nocardiaceae

Nocardiaceae

The Nocardiaceae are a family of aerobic, non-fastidious, high G+C, Gram-positive actinomycetes that are commonly found in soil and water. Members of this family have been isolated from Antarctic soils...

, Streptosporangiaceae and Pseudonocardiaceae

Pseudonocardiaceae

Pseudonocardiaceae is a family of bacteria in the order Actinomycetales.-Genera:* Type genus: Pseudonocardia, Henssen 1957 * Actinoalloteichus* Actinobispora* Actinomycetospora* Allokutzneria* Amycolata...

. These changes effectively ended the official status of this genus, but the name persists in older research articles, and is occasionally used in contemporary settings.

Family Streptosporangiaceae

• Micropolyspora angiospora became Microtetraspora angiospora, which became Nonomuraea angiospora.

Family Pseudonocardiaceae

• Micropolyspora faeni became Micropolyspora rectivirgula, which became Faenia rectivirgula, which became Saccharopolyspora rectivirgula
  Saccharopolyspora rectivirgula
  Saccharopolyspora rectivirgula is a species of bacteria. It is a Gram-positive rod. It was formerly known as Micropolyspora faeni.Inhalation of the bacteria can cause the disease farmer's lung, a type of hypersensitivity pneumonitis. Handling hay bales increases exposure to the bacteria and...
  
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• Micropolyspora internatus became Saccharomonospora internatus, but this change has not yet been officially accepted.