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Related Experiment Videos

Family Spirosomaceae: gram-negative ring-forming aerobic bacteria.

H D Raj1, S R Maloy

  • 1Department of Microbiology, California State University, Long Beach.

Critical Reviews in Microbiology
|January 1, 1990
PubMed
Summary

This study redefines the classification of Gram-negative, ring-forming bacteria, previously known as Microcyclus. The research establishes five distinct genera within this group, revising their taxonomic placement and family affiliations.

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Area of Science:

  • Microbiology
  • Bacteriology
  • Taxonomy

Background:

  • The classification of ring-forming bacteria, initially Spirosoma and later Microcyclus, has been historically complex due to incomplete descriptions and lost cultures.
  • Previous taxonomic efforts relied heavily on characteristic morphology, leading to potential misclassifications.

Purpose of the Study:

  • To re-examine and redefine the systematics of Gram-negative, ring-forming aerobic bacteria.
  • To establish a revised taxonomic framework for these bacteria based on recent studies.

Main Methods:

  • Review of historical taxonomic data and recent scientific literature.
  • Analysis of ecological, morphogenetic, metabolic, and physiological studies.

Main Results:

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  • The heterogeneous group of ring-forming bacteria has been redefined into five distinct genera: Ancylobacter, Cyclobacterium, Flectobacillus, Runella, and Spirosoma.
  • Four genera (Cyclobacterium, Flectobacillus, Runella, and Spirosoma) have been grouped into the family Spirosomaceae.
  • The genus Ancylobacter remains unassigned to a family.

Conclusions:

  • The reclassification provides a more accurate taxonomic structure for these unique bacteria.
  • This revised system clarifies the evolutionary and systematic relationships within this group.
  • Further research into the ecology, morphogenesis, metabolism, and physiology of these bacteria is ongoing.