Acta Parasitologica

, Volume 61, Issue 4, pp 707–712 | Cite as

A new species of Trichodina Ehrenberg, 1830 (Ciliophora: Trichodinidae) from Rhamdia quelen(Siluriformes: Heptapteridae) and Gymnotus sp. (Teleostei: Gymnotidae) in Brazil

  • Gabriela S. O. Hashimoto
  • Natalia C. Marchiori
  • Santiago B. Pádua
  • Márcia M. Ishikawa
  • Juan R. E. Garcia
  • Maurício L. MartinsEmail author


The present study describes a new species of Trichodina found in the mucus of the body surface of 137 farmed and wild silver catfish (Rhamdia quelen) located in southern Brazil and in the gills of 99 banded knife fish (Gymnotus sp.) captured in the basin of Pantanal. Smears of the body surface mucus and gills were air dried at room temperature and impregnated with silver nitrate and stained with Giemsa for analysis of the adhesive disc, denticles and macronucleus. Characterized as a medium trichodinid, Trichodina quelenii n. sp. resembles T heterodentata and T acuta. It differs from T heterodentata by the shape of the blade and from T acuta by the lack of central circle. Furthermore, the distinct shape of the blade of T quelenii n. sp. differs from all previously described species for the genus, leaving no doubt it is a new species.


Silurid fish gymnotid fish parasitology Trichodina description prevalence 


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Copyright information

© Witold Stefański Institute of Parasitology, Polish Academy of Sciences 2016

Authors and Affiliations

  • Gabriela S. O. Hashimoto
    • 1
  • Natalia C. Marchiori
    • 2
  • Santiago B. Pádua
    • 1
    • 3
  • Márcia M. Ishikawa
    • 4
  • Juan R. E. Garcia
    • 5
  • Maurício L. Martins
    • 1
    Email author
  1. 1.AQUOS — Aquatic Organism Health Laboratory, Aquaculture DepartmentFederal University of Santa Catarina (UFSC)FlorianópolisBrazil
  2. 2.EPAGRI — Company of Agricultural Research and Rural Extension of Santa CatarinaRua Joaquim Garcia, s/nCamboriúBrazil
  3. 3.Aquivet — Aquatic HealthSão José do Rio Preto, SPBrazil
  4. 4.Embrapa EnvironmentTanquinhoJaguariúnaBrazil
  5. 5.Panamá Fish Farming Ltda.Paulo LopesBrazil

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