A new species, Henneguya lacustris n. sp. (Cnidaria: Myxosporea), infecting the gills of Astyanax lacustris from Brazil.
The present study describes Henneguya lacustris n. sp. parasitizing Astyanax lacustris (Lütken 1875), from the Tietê River, State of São Paulo, Brazil, through morphological and molecular analysis. Myxospores of the parasites were found in the gills of A. lacustris with 13% prevalence of infection. The myxospores were oval and presented as measures (mean ± standard deviation): total length 18.3 ± 2.2 μm, body length 10.4 ± 1.6 μm, body width 4.9 ± 0.9 μm, tail length 7.2 ± 2.5 μm. The polar capsule was 4.8 ± 0.3 μm long and 1.5 ± 0.2 μm wide. The polar tubules, present inside the polar capsules, had 6 to 7 turns. The ultrastructural analysis allowed the observation of the asynchronous development of the myxospores. Phylogenetic analysis showed H. lacustris n. sp. as a sister species of H. chydadea Barassa and Cordeiro 2003 in a subclade formed by species that parasitize the gills of Characiform fish from Brazil. Using molecular and morphological characterization, this parasite was identified as a new species of the genus Henneguya Thélohan 1892.
['Vieira|Diego Henrique Mirandola Dias|DHMD|http://orcid.org/0000-0002-6137-1353', 'Rangel|Luís Filipe|LF|', 'Tagliavini|Vinicius Panciera|VP|', 'Abdallah|Vanessa Doro|VD|', 'Santos|Maria João|MJ|', 'de Azevedo|Rodney Kozlowiski|RK|']
D000818:Animals D001938:Brazil D060126:Characidae D005393:Fish Diseases D005880:Gills D055764:Myxozoa D010273:Parasitic Diseases, Animal D010802:Phylogeny D015995:Prevalence D045483:Rivers
Tietê River Ultrastructural Myxobolidae Phylogeny SSU rDNA