Systematic Parasitology

, Volume 94, Issue 6, pp 649–656 | Cite as

Spinitectus aguapeiensis n. sp. (Nematoda: Cystidicolidae) from Pimelodella avanhandavae Eigenmann (Siluriformes: Heptapteridae) in the River Aguapeí, Upper Paraná River Basin, Brazil

  • Aline Angelina Acosta
  • David González-Solís
  • Reinaldo José da Silva
Article

Abstract

Nematodes belonging to Spinitectus Fourment, 1883 (Nematoda: Cystidicolidae) were found in the intestine of Pimelodella avanhandavae Eigenmann (Siluriformes: Heptapteridae) from the Aguapeí River, Brazil. They represent a new species, Spinitectus aguapeiensis n. sp., which differs morphologically from its congeners in the body length, the number of spinose rings, the location of the excretory pore, the number of precloacal papillae and the length of the spicules. The new species is the first South American species within the genus with a remarkably spirally coiled posterior extremity in males and the largest spicules. It is also the second species with the highest number of precloacal papillae and has unique shape of the small spicule. Spinitectus aguapeiensis n. sp. is the first helminth species found in P. avanhandavae, the fourth species of this genus recorded in the River Paraná Basin and the sixth species of Spinitectus in South America.

Keywords

Excretory Pore Posterior Extremity Anterior Extremity Helminth Species Helminthological Collection 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The authors thank the Companhia Elétrica de São Paulo (CESP) for the logistical support during sampling. Thanks are also due to Tomáš Scholz for hosting AAA, František Moravec for help with nematode identification and the staff of the Laboratory of Electron Microscopy, all from the Institute of Parasitology, Biology Centre of the Czech Academy of Sciences in České Budějovice, as well as to Janneth Padilla Saldívar from El Colegio de la Frontera Sur for her help with illustrations.

Funding

This study was funded by Fundação de Amparo à Pesquisa do Estado de São Paulo – FAPESP (2012/22895–7, 2015/22382–8: AAA); Institute of Parasitology (RVO: 60077344: AAA); Czech Science Foundation (Project No. P505/12/G112: DGS; AAA); CNPq (PQ-2 – 307808/2014-9: RJS) and CNPq-PROTAX (440496/2015-2)/FAPESP 2016/50377-1: RJS).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

All applicable institutional, national and international guidelines for the care and use of animals were followed.

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Copyright information

© Springer Science+Business Media Dordrecht 2017

Authors and Affiliations

  1. 1.Departamento de Parasitologia, Instituto de BiociênciasUniversidade Estadual Paulista (UNESP)BotucatuBrazil
  2. 2.El Colegio de la Frontera Sur (ECOSUR)ChetumalMexico
  3. 3.Institute of ParasitologyBiology Centre of the Czech Academy of SciencesČeské BudějoviceCzech Republic

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