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

Par Conseil national de recherches du Canada

DOITrouver le DOI : https://doi.org/10.3354/dao066227
AuteurRechercher : ; Rechercher : ; Rechercher : ; Rechercher : 1
Affiliation
  1. Conseil national de recherches du Canada. Institut des biosciences marines du CNRC
FormatTexte, Article
Sujetmyxozoan; Myxobolus bilobus n. sp.; Notemigonus crysoleucas
Résumé
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.
Date de publication
Conditions d’utilisation
  • Copyright © 2005 Inter-Research
Dans
  • Diseases of Aquatic Organisms 66, nº 3 (23 septembre 2005) : 227–232.
Langueanglais
Publications évaluées par des pairsOui
Numéro du CNRCNRCC 42454
1394
Numéro NPARC3538374
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Identificateur de l’enregistrementa9f37dfb-304a-4f2e-bdb0-9b83edf62035
Enregistrement créé2009-03-01
Enregistrement modifié2021-09-17
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