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Further study on Procamallanus (Spirocamallanus) pintoi (Kohn et Fernandes, 1988) (Nematoda: Camallanidae) in Corydoras paleatus and Corydoras micracanthus (Siluriformes: Callichthyidae) from Salta, Argentina, with a key to congeneric species from Neotropical Realm

Lorena G. Ailán-Choke, Geraldine Ramallo and Dora Davies
From the journal Acta Parasitologica

Abstract

This study describes the morphology of Procamallanus (Spirocamallanus) pintoi (Kohn et Fernandes, 1988), isolated from the intestine of Corydoras micracanthus Regan, 1912 and C. paleatus (Jenyns, 1842) (both Callichthyidae, Siluriformes) from Bermejo and Juramento River basins, respectively, province of Salta, Argentina. This is the first record of P. (S.) pintoi in C. micracanthus from Northwestern Argentina. The light and scanning electron microscopy observations of P. (S.) pintoi, revealed a few previously unreported morphological details of the cephalic region, vulva and caudal region of males. In addition, morphometric variability was observed in, mainly body size, glandular oesophagus length and position of the vulva between present specimens and those described in previous studies. A key to the species of Procamallanus (Spirocamallanus) from the Neotropical Realm is proposed.

Acknowledgments

The authors wish to thanks to the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET, Argentina) and the Consejo de Investigación de la Universidad Nacional de Salta (CIUNSa, Argentina) for providing financial support; and the Secretaría de Medio Ambiente del Gobierno de la Provincia de Salta for allowing us to make the collection of ichthyologic materials. We are grateful to Daniel Paredes, Florencia Liquín, José Saravia and Federico Soria, for their assistance in the capture of hosts; Fabiana Cancino and Roberto Sánchez for their help with the identification of fishes, Pablo Pereira and José Saravia for help with the digitalization of figures and Nathalia Arredondo for her useful suggestions. We would also like to thank Luciano Martinez and Hernán Esquivel with the staff of the Laboratory of Scanning Electron Microscopy (CIME) (Tucumán, Argentina), for their technical assistance and to the anonymous reviewers for their valuable comments and suggestions.

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Received: 2018-02-13
Revised: 2018-05-02
Accepted: 2018-05-04
Published Online: 2018-07-04
Published in Print: 2018-09-25

© 2018 W. Stefański Institute of Parasitology, PAS