Three New Species of Jainus (Monogenea: Dactylogyridae) Parasitizing Gills of Brazilian Freshwater Fishes Supported by Morphological and Molecular Data & DAG;

Author(s)

Fadel Yamada, Priscilla de Oliveira ; Mueller, Maria Isabel ; Zago, Aline Cristina ; Yamada, Fabio Hideki ; Ebert, Mariana Bertholdi ; Franceschini, Lidiane ; da Silva, Reinaldo Jose

• Document type: Journal article
• Source: DIVERSITY-BASEL; v. 15, n. 5, p. 19-pg., 2023-05-14.

Abstract

The present study describes three new species of monogeneans parasitizing the gills of anostomid fishes from the Upper Parana River basin, southeastern Brazil: Jainus beccus n. sp. and Jainus radixelongatus n. sp. on Leporinus friderici, Leporinus octofasciatus, Leporinus striatus, and Megaleporinus elongatus; and Jainus ornatus n. sp. on L. friderici. The new species differ from other congeners by the morphology of the accessory piece. There is a semicircular distal portion resembling a "bird's beak" in Jainus beccus n. sp. It composed of two subunits-one ventral and more sclerotized, sickle-shaped, and another dorsal with three projections-in Jainus radixelongatus n. sp. There are two elongated and sclerotized subunits, both of which have a sickle-shaped distal portion, in Jainus ornatus n. sp. Supplementary observations not reported in the original descriptions of the type-species Jainus piava Karling, Bellay, Takemoto & Pavanelli, 2011 are proposed, as follows: the presence of a thin and delicate ventral bar, which can vary greatly in shape; an accessory piece not articulated with the MCO's base. This paper provides the first phylogenetic study based on LSU rDNA and COI mtDNA gene sequences for Jainus, improving and clarifying the understanding of host-parasite relationships in neotropical characiforms. (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: 15/11543-0 - Biodiversity and spacial structure of parasites of Loricariidae fishes (Teleostei: Siluriformes) from Brazil
• Grantee: Lidiane Franceschini
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• FAPESP's process: 16/07829-9 - Biodiversity of parasites of Characiformes fishes (Teleostei) from streams of the Middle Paranapanema River Basin, Southeast Brazil
• Grantee: Aline Cristina Zago
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 14/14298-4 - Host parasite interactions and potential reciprocal effects on the ecosystem
• Grantee: Fábio Hideki Yamada
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• 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: 15/11542-4 - Biodiversity and spatial structure of metazoan parasite communities of fishes from the Sapucaí-Mirim River, Southeastern Brazil
• Grantee: Aline Cristina Zago
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• FAPESP's process: 12/07850-7 - Biodiversity of the helminths of Loricariidae fishes (Teleostei: Siluriformes) from Sapucaí-Mirim River, Brazil
• Grantee: Lidiane Franceschini
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 11/22603-3 - Helminths of fish as environmental bioindicators of the Jurumirim Reservoir (Upper Paranapanema River, SP, Brazil).
• Grantee: Fábio Hideki Yamada
• 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: 11/23588-8 - Biodiversity of helminth parasites of fishes from the Sapucaí-Mirim River, São Paulo State, Brazil
• Grantee: Aline Cristina Zago
• Support Opportunities: Scholarships in Brazil - Doctorate