First record of Procamallanus (Spirocamallanus) inopinatus travassos, Artigas & Pereira, 1928 and contracaecum sp. For Auchenipterus nuchalis (Spix & Agassiz 1829) (Siluriformes: Auchenipteridae) in the Amazon

• Autores: Ferreira-Cordeiro, Jéssica Yelle, Silva-Jtineant, Amanda Karen, de Oliveira-Malta, José Celso, Rapp-Py-Daniel, Lúcia Helena
• Formato: artículo
• Fecha de Publicación: 2023
• Institución: Universidad Nacional Federico Villarreal
• Repositorio: Revistas - Universidad Nacional Federico Villarreal
• Lenguaje: español
• OAI Identifier: oai:ojs2.revistas.unfv.edu.pe:article/1689
• Enlace del recurso: https://revistas.unfv.edu.pe/NH/article/view/1689
• Nivel de acceso: acceso abierto
• Materia: Amazon; freshwater; endoparasites; nematodes; siluriformes; várzea; Amazonía; agua dulce; endoparásitos; llanura aluvial; nematodos; Amazônia; água doce; endoparasitos; nematoides

Auchenipterus nuchalis (Spix & Agassiz 1829) or Peruvian mandi is a small catfish that occurs in South America, has crepuscular habits and feeds basically on aquatic insects and microcrustaceans. Thirty-eight A. nuchalis were captured in four expeditions during the ebb and dry periods of 2016, in the Catalão lake complex, in the municipality of Iranduba, in the interior of the state of Amazonas, Brazil. Fish averaged 11.8 - 18 (15.1 ± 1.35) cm in standard length and weighed 30.1 - 71.0 (47 ± 10.66) g. The individuals' digestive tract was conserved in 70% ethanol until the analyzes were carried out. Of the total number of fish collected and examined, 21 were parasitized. Temporary and permanent slides were mounted for the identification of parasitic specimens. The measurements of the individuals were made with the aid of a micrometric eyepiece, coupled to an optical microscope. We collected 53 individuals of Procamallanus (S.) inopinatus Travassos, Artigas & Pereira, 1928 with an infection prevalence rate of 52.6% and 17 individuals in the larval stage of Contracaecum sp., with a prevalence of 2.63%. Thus, the species were classified as secondary and satellite species, respectively. Furthermore, this is an unprecedented record of these parasites for A. nuchalis in the Amazon region, Brazil.