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Taxonomy and molecular phylogeny of Myxobolus bilobus n.sp. (Myxozoa) parasitizing Notemigonus crysoleucas (Cyprinidae) in Algonquin Park, Ontario, Canada

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.3354/dao066227
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Affiliation
  1. National Research Council of Canada. NRC Institute for Marine Biosciences
FormatText, Article
Subjectmyxozoan; Myxobolus bilobus n. sp.; Notemigonus crysoleucas
Abstract
Myxobolus bilobus n. sp. (Myxozoa) is described from golden shiner Notemigonus crysoleucas in Algonquin Park, Ontario, Canada. Plasmodia develop at the distal end of gill filaments, where they form a novel-shaped plasmodium made up of 2 side-by-side hemispheres joined at a central pore. Surrounding gill tissue is vacuolated, necrotic, and hemorrhagic. Spores of M. bilobus n. sp. resemble those of M. aureatus Ward, 1919, M. angustus Kudo, 1934, M. spalli Landsberg & Lom, 1991, and M. pseudokoi Li & Desser, 1985 in parasitizing cyprinids and in their pyriform shape. Spores of M. bilobus n. sp., however, are much larger (20 to 22.1 µm long, 7.5 to 9.3 µm wide, and 6 µm thick) than those of these other species, and the plasmodium is bi-lobed rather than the typical hollow sphere. A phylogenetic analysis of the 18S rDNA (2014 bp) reveals that M. bilobus n. sp. is a member of a clade that includes 11 species of Myxobolus, all of which are parasites of cyprinid fishes in North America or Eurasia. The study concludes that M. bilobus n. sp. is a member of a clade that has undergone radiation within cyprinid fishes of the 2 continents and that this evolution has involved both host and site switching.
Publication date
Terms of use
  • Copyright © 2005 Inter-Research
In
  • Diseases of Aquatic Organisms 66, no. 3 (23 September 2005): 227–232.
LanguageEnglish
Peer reviewedYes
NRC numberNRCC 42454
1394
NPARC number3538374
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Record identifiera9f37dfb-304a-4f2e-bdb0-9b83edf62035
Record created2009-03-01
Record modified2021-09-17
Date modified: