Abstract
The myxozoan Henneguya friderici is a parasite of the gills, intestine, kidney and liver of Leporinus friderici, a characiform fish belonging to the family Anostomidae. Forty-two specimens of L. friderici that had been caught in the Mogi Guaçú River, state of São Paulo, were studied. Elongated white plasmodia were found in the gill filaments of 10 host specimens (24%). The mature spores had an ellipsoidal body with polar capsules of equal size and caudal length greater than body length. This study also described 18S rDNA sequencing of H. friderici infecting the gill filaments. This produced a sequence of 1050 bp that demonstrated significant genetic differences with previously described species of Henneguya. Similarity analysis using sequences from species that clustered closest to those produced by this study showed that the species with greatest genetic similarity to H. friderici was H. leporinicola, with 94% similarity.
Highlights
The diversity of known myxozoans has grown greatly since the early work of Kudo (1919)
The myxozoan Henneguya friderici is a parasite of the gills, intestine, kidney and liver of Leporinus friderici, a characiform fish belonging to the family Anostomidae
This study described 18S rDNA sequencing of H. friderici infecting the gill filaments
Summary
The diversity of known myxozoans has grown greatly since the early work of Kudo (1919). Around 2.200 species have been described (LOM & DYKOVÁ, 2006) and these represent around 18% of cnidarian species diversity, as far as is currently known (OKAMURA et al, 2015). Henneguya Thélohan, 1892, Currently, more than 44 species of Henneguya are known to infect South America fish (EIRAS, 2002; EIRAS & ADRIANO, 2012; CARRIERO et al, 2013; NALDONI et al, 2014)
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