Parasitology Research

, Volume 118, Issue 6, pp 1967–1973 | Cite as

New data on Myxobolus imparfinis (Cnidaria, Myxosporea): host, distribution, and ultrastructural morphology

  • Lidiane FranceschiniEmail author
  • Diego Henrique Mirandola Dias Vieira
  • Aline Cristina Zago
  • Rodney Kozlowiski Azevedo
  • Vanessa Doro Abdallah
  • Reinaldo José da Silva
Fish Parasitology - Short Communication


A mass of free myxozoan spores was found in the gill filaments of specimens of Cetopsorhamdia iheringi Schubart and Gomes, 1959, popularly known as “three-barbeled catfishes” (Heptapteridae, Siluriformes) collected in streams of the Middle Paranapanema River, Upper Paraná River basin, in the state of São Paulo, Brazil. Morphological and molecular analysis identified the spores as Myxobolus imparfinis Vieira, Tagliavini, Abdallah and Azevedo, 2018. The ultrastructural morphology of this parasite is described here for the first time. Differences were observed in the number of coils of the polar filament as well as some organelles not previously described for this species. Asynchronous development was also observed, with the presence of both mature and immature spores. This is the first report of a myxozoan parasitizing C. iheringi and the first geographical record of myxozoan parasites in streams of the Middle Paranapanema River. The new data improve the original description of the species and add to the knowledge of host-parasite interactions and distribution.


Brazilian catfish Heptapteridae Streams TEM Myxozoans 



The anonymous reviewers are acknowledged for their suggestions and remarks to improve the manuscript. We are grateful to Virgínia Sanches Uieda, Fernando Portella Rodrigues de Arruda, Sílvio César de Almeida, and Pedro Sartori Manoel for logistical support in the collection of hosts and taxonomic suggestions.

Funding information

The authors would like to thank CAPES (Coordination for the Improvement of Higher Education Personnel) and FAPESP (São Paulo Research Foundation) for financial and scientific support, and the post-graduate scholarships granted to L.F (CAPES/PNPD 17/2016); A.C.Z (FAPESP: 2016/07829–9); D.H.M.D.V. (FAPESP: 2015/24901–2). R.J.S. is supported by the National Council for Scientific and Technological Development (CNPq) (309125/2017–0; PROTAX: 440496/2015–2), and FAPESP (2016/50377–1).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

All applicable guidelines for the care and use of animals were followed.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Lidiane Franceschini
    • 1
    Email author
  • Diego Henrique Mirandola Dias Vieira
    • 1
  • Aline Cristina Zago
    • 1
  • Rodney Kozlowiski Azevedo
    • 2
  • Vanessa Doro Abdallah
    • 2
  • Reinaldo José da Silva
    • 1
  1. 1.Institute of Biosciences, Campus Botucatu, Department of ParasitologySão Paulo State University (Unesp)São PauloBrazil
  2. 2.Centro Universitário CESMACEnvironmental Systems AnalysisAlagoasBrazil

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