Aquaspirillum

Aquaspirillum (ak'wă-spī-ril'ŭm) is a genus of aerobic bacteria in the family Neisseriaceae that lives in freshwater.

Aquaspirillum
Scientific classification
Kingdom:
Bacteria
Phylum:
Proteobacteria
Class:
Beta Proteobacteria
Order:
Neisseriales
Family:
Neisseriaceae
Genus:
Aquaspirillum

Description

The species have cells that are 0.2–1.5 mcm in diameter. Their motile cells have a fascicle of flagella on one or both ends, with the exception of one species.[1] They are rigid and generally helical, and are 0.2–1.4 um in diameter. They also have a special polar membrane near the flagella.[2]

Growth Requirements

Growth is optimal in 30–32° Celsius.[3]

Species

The following are species of Aquaspirillum.[4]

Phylogenetic Analysis

A phylogenetic analysis by NCBI showed data that suggested all species of Aquaspirillum, besides the type species, should be moved into their own respective genera as Aquaspirillum is phylogenetically heterogeneous.[6] However, no new genus for the misclassified species has been proposed, so they technically remain in Aquaspirillum.[7]

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References
  1. Medilexicon Dictionary Retrieved March 18, 2016
  2. Web2 Resources
  3. Hylelmon,P.B., J.S. Wells, N.R.Krieg and H.W. Jannasch (1973) The genus Spirillum: a taxonomic study
  4. Springer Link Article by Bruno Pot, Monique Gillis, Jozef De Ley
  5. lpsn.dsmz.de
  6. Ding, L; Yokota, A (2002). "Phylogenetic analysis of the genus Aquaspirillum based on 16S rRNA gene sequences". FEMS Microbiol Lett. 212 (2): 165–9. doi:10.1016/s0378-1097(02)00747-4. PMID 12113929.
  7. Pot, B. and Gillis, M. 2015. Aquaspirillum. Bergey's Manual of Systematics of Archaea and Bacteria. 1–39.
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