New species of Anacanthorus (dactylogyridae) and new data for Anacanthorus simpliciphallus parasitizing characiform fishes from Tocantins river, Maranhão State, Brazil

• Autores: B. de Freitas, Alvaro J., de P. Reyes, Amanda P., Nascimento Justo, Marcia Cristina, M. Bezerra, Carine A., Viana, Diego C., Cohen, Simone C.
• Formato: artículo
• Fecha de Publicación: 2025
• Institución: Universidad Nacional Federico Villarreal
• Repositorio: Revistas - Universidad Nacional Federico Villarreal
• Lenguaje: español
• OAI Identifier: oai:ojs2.revistas.unfv.edu.pe:article/1975
• Enlace del recurso: https://revistas.unfv.edu.pe/NH/article/view/1975
• Nivel de acceso: acceso abierto
• Materia: Byrconidae; Monopisthocotyla; Região Neotropical; Platelmintos; Taxonomia; Rio Tocantins; Neotropical Region; Platyhelminthes; Taxonomy; Tocantins River; Región Neotropical; Taxonomía; Río Tocantins

Anacanthorus Mizelle & Price, 1965 is the most diverse genus of Dactylogyridae and is characterized by the absence of anchors and bars in the haptor. Members of Anacanthorus are found parasitizing until now only fishes belonging to order Characiformes. Specimens of Brycon pesu Müller & Troschel, 1845 and Caenotropus labyrinthicus (Kner, 1858) were collected from Tocantins River, Brazil and had their gills removed and individualized in bottles containing water heated to (~65ºC), to relax and release the parasites, and ethanol absolute was increased to reach the concentration of 70%. The parasites found were collected and mounted in Hoyer´s medium. A new species of Anacanthorus, A. itaueirasensis sp. nov., is described from Brycon pesu, presenting the characteristics of Anacanthorus species parasitic on bryconids, as morphology of the copulatory complex, composed of a tubular MCO and membranous accessory piece, hooks with a bulbous proximal part of the hook and a poorly developed thumb. A new record for Anacanthorus simpliciphallus Silva, Cohen, Costa & Justo, 2024 and the comparative measurements are presented, increasing the knowledge of parasite fauna from fishes of Tocantins-Araguaia Basin.