Molecular phylogeny of two Rhinoxenus species (Monogenea: Dactylogyridae) from the nasal cavities of serrasalmids (Characiformes: Serrasalmidae) from Brazil

Author(s)

Osaki-Pereira, Melissa Miyuki ; Narciso, Rodrigo Bravin ; Mirandola Dias Vieira, Diego Henrique ; Mueller, Maria Isabel ; Ebert, Mariana Bertholdi ; da Silva, Reinaldo Jose

• Document type: Journal article
• Source: Systematic Parasitology; v. 100, n. 5, p. 10-pg., 2023-06-20.

Abstract

The dactylogyrid genus Rhinoxenus (Monogenea: Dactylogyridae) is composed of specialized monogeneans infecting the nasal cavities of freshwater fishes from the Neotropical region. This taxon currently comprises 11 species and is easily distinguished from other monogeneans by the absence of the dorsal bar, ventral anchor with inconspicuous roots covered by a sclerotized cap, dorsal anchor greatly modified into a needle-like shape, and hook pair 2 located into bilateral lobes of the trunk. Specimens of Rhinoxenus euryxenus and Rhinoxenus paranaensis were found infecting the nasal cavities of Serrasalmus marginatus and Serrasalmus maculatus, respectively, from the Parana River basin in Brazil. For the first time, molecular data of Rhinoxenus spp. were obtained and used as a basis for phylogenetic analyses of the genus. Furthermore, our findings represent the first record of R. paranaensis in Brazil. (AU)

• FAPESP's process: 21/12779-9 - Diversity, taxonomy and systematic of fish parasites from Pardo River, Middle Paranapanema River, São Paulo State
• Grantee: Mariana Bertholdi Ebert
• Support Opportunities: Scholarships in Brazil - Technical Training Program - Technical Training
• FAPESP's process: 17/16546-3 - Systematic and distribution of myxosporeans of Potamotrygonidae (Elasmobranchii, Myliobatiformes) in Amazon, Platina and Parnaíba river basins.
• Grantee: Maria Isabel Muller Formico
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 19/19060-0 - Systematic and distribution of myxozoans collected in fish from Pardo River, middle Paranapanema River, State of São Paulo
• Grantee: Diego Henrique Mirandola Dias Vieira
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 20/05412-9 - Diversity, taxonomy and systematic of fish parasites from Pardo River, Middle Paranapanema River, São Paulo State
• Grantee: Reinaldo José da Silva
• Support Opportunities: BIOTA-FAPESP Program - Regular Research Grants
• FAPESP's process: 19/26831-2 - Diversity and systematics of ergasilids parasites of fishes from Pardo River, Middle Paranapanema, São Paulo State
• Grantee: Rodrigo Bravin Narciso
• Support Opportunities: Scholarships in Brazil - Doctorate