ArticleActa parasitologica2025
New Henneguya Species Cause Gill Disease of Commercial Amazonian Fish.
Article in Acta parasitologica, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Morphological and molecular characterisation ofInternational journal for parasitology. Parasites and wildlife · 2026Article
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5 authors.
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Abstract
backgroundFreshwater fish are affected with much parasitic diseases, among the most common are Henneguyosis caused by myxozoans of the genus Henneguya, which exhibit great diversity in fish from South America, particularly in the Brazilian Amazon. PURPOSE: In this present study, we describe the morphological and phylogenetic aspects of the small ribosomal subunit (SSU rDNA) of two new species of Henneguya infecting the gills from Hypophthalmus marginatus, a freshwater catfish from the Amazon.
methodsIn 148 specimens, has been observed cyst formation in different regions of the gills, intrafilamentary and intralamellar. These samples were collected for PCR amplification and phylogenetic analysis.
resultsThe myxospores from each cyst have an elliptical spore body, consisting of two elliptical polar capsules, but differed in taxonomic morphometric measurements, such as total size, caudal length, spore body length and width, and polar capsule length and width. Phylogenetically, the species formed a clade with Henneguya spp. described in Siluriform fish in Brazil.
conclusionThese findings support the description of two species, Henneguya matosi n. sp. and H. marginatus n. sp., which infect different regions of the gills of Hypophthalmus marginatus, a commercially important catfish.
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