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Scientific classification
Domain: Eukaryota
(unranked): Excavata
Phylum: Metamonada
Order: Diplomonadida
Family: Hexamitidae
Genus: Spironucleus

Spironucleus barkhanus
Spironucleus meleagridis
Spironucleus muris
Spironucleus salmonicida
Spironucleus salmonis
Spironucleus torosa
Spironucleus vortens

Spironucleus is a genus of Diplomonad flagellates that inhabit the digestive tract of a variety of animal hosts. Some are pathogens and others are commensals. Spironucleus parasites are often found in fish, but can be found in mice and birds.[1]


  1. ^ Andersson, J. O., Sjogren, A. M., Horner, D. S., Murphy, C. A., Dyal, P. L., Svard, S. G., & Ragan, M. A. (2007, February 14). A genomic survey of the fish parasite Spironucleus salmonicida indicates genomic plasticity among diplomonads and significant lateral gene transfer in eukaryote genome evolution. BMC Genomics, 8(51). doi:10.1186/1471-2164-8-51

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