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Acta Parasitologica

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Volume 61, Issue 4


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
  • AQUOS - Aquatic Organism Health Laboratory, Aquaculture Department, Federal University of Santa Catarina (UFSC), Rod. Admar Gonzaga 1346, 88040-900, Florianópolis, SC, Brazil
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Natalia C. Marchiori
  • EPAGRI - Company of Agricultural Research and Rural Extension of Santa Catarina, Rua Joaquim Garcia, s/n, 88340-000, Camboriú, SC, Brazil
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Santiago B. Pádua
  • AQUOS - Aquatic Organism Health Laboratory, Aquaculture Department, Federal University of Santa Catarina (UFSC), Rod. Admar Gonzaga 1346, 88040-900, Florianópolis, SC, Brazil
  • Aquivet - Aquatic Health, Rua Antonio Ernesto Célico 359, Sao José do Rio Preto, SP 15061-810, SP, Brazil
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Márcia M. Ishikawa / Juan R.E. Garcia / Maurício L. Martins
  • Corresponding author
  • AQUOS - Aquatic Organism Health Laboratory, Aquaculture Department, Federal University of Santa Catarina (UFSC), Rod. Admar Gonzaga 1346, 88040-900, Florianópolis, SC, Brazil
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  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2016-10-22 | DOI: https://doi.org/10.1515/ap-2016-0099


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.

Keywords: Silurid fish; gymnotid fish; parasitology; Trichodina; description; prevalence


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About the article

Received: 2016-02-23

Revised: 2016-05-31

Accepted: 2016-06-15

Published Online: 2016-10-22

Published in Print: 2016-12-01

Citation Information: Acta Parasitologica, Volume 61, Issue 4, Pages 707–712, ISSN (Online) 1896-1851, ISSN (Print) 1230-2821, DOI: https://doi.org/10.1515/ap-2016-0099.

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