Acta Parasitologica

, Volume 53, Issue 3, pp 284–288 | Cite as

Gamidactylus piranhus sp. nov. (Copepoda, Vaigamidae) from the nasal fossae of serrasalmid fishes from the Três Marias Reservoir, Upper São Francisco River, Minas Gerais State, Brazil

  • Vernon E. Thatcher
  • Michelle D. Santos
  • Marilia C. Brasil-Sato
Original Paper

Abstract

Gamidactylus piranhus sp. nov. (Copepoda, Vaigamidae) from the nasal fossae of “San Francisco piranha”, Pygocentrus piraya (Cuvier, 1819) and.White piranha. Serrasalmus brandtii (Lütken, 1875) is described. The new species is similar to the type species of the genus, Gamidactylus jaraquensis Thatcher et Boeger, 1984, but differs from it in the following respects: the cephalothorax is shorter, the free thoracic segments are usually longer, leg 5 is reduced to a simple seta and a spine on the second antennal segment is lacking. Gamidactylus bryconis Varella, 1995 and Gamidactylus hoplius Varella et Malta, 1996, do not closely resemble the new species because they are much larger and both present leg 5 reduced to a double seta.

Keywords

Gamidactylus piranhus Pygocentrus Serrasalmus Três Marias Reservoir São Francisco River Brazil 

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Copyright information

© © Versita Warsaw and Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • Vernon E. Thatcher
    • 1
  • Michelle D. Santos
    • 2
  • Marilia C. Brasil-Sato
    • 3
  1. 1.Departamento de ZoologiaUniversidade Federal do ParanáCuritibaBrazil
  2. 2.Curso de Pós-Graduação em Ciências VeterináriasUniversidade Federal Rural do Rio de JaneiroSão PaulBrazil
  3. 3.Departamento de Biologia AnimalUFRRJSeropédicaBrazil

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