A new species, Henneguya lacustris n. sp. (Cnidaria: Myxosporea), infecting the gills of Astyanax lacustris from Brazil
- PDF / 1,451,833 Bytes
- 7 Pages / 595.276 x 790.866 pts Page_size
- 74 Downloads / 182 Views
FISH PARASITOLOGY - SHORT COMMUNICATION
A new species, Henneguya lacustris n. sp. (Cnidaria: Myxosporea), infecting the gills of Astyanax lacustris from Brazil Diego Henrique Mirandola Dias Vieira 1 & Luís Filipe Rangel 2 & Vinicius Panciera Tagliavini 1 & Vanessa Doro Abdallah 3 & Maria João Santos 2 & Rodney Kozlowiski de Azevedo 3 Received: 22 May 2020 / Accepted: 30 August 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract 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. Keywords Myxobolidae . Phylogeny . SSU rDNA . Tietê River . Ultrastructural
Introduction Myxozoans are cnidarian parasites mainly of fish, with a life cycle that alternates between a vertebrate host and an invertebrate (Lom and Dykova 2006). The genus Henneguya Thélohan 1892 is one of the most specious genera within the Myxozoa subphylum, including more than 200 described species (Eiras and Adriano 2012). Some species are known to be pathogenic to their hosts, causing diseases as such as cardiac Section Editor: Astrid Holzer * Diego Henrique Mirandola Dias Vieira [email protected] 1
Departament of Parasitology, Universidade Estadual Paulista “Júlio de Mesquita Filho” – Unesp, R. Prof. Dr. Antônio Celso Wagner Zanin, 250 - Distrito de Rubião Junior, Botucatu, São Paulo CEP: 18618-689, Brazil
2
Faculdade de Ciências e CIIMAR – Porto, Universidade do Porto, Porto, Portugal
3
Programa de Pós-graduação em Análise de Sistemas Ambientais, Centro Universitário CESMAC, Maceió, Alagoas, Brazil
henneguyosis and gill lamellar deformation, leading in some cases to large economic losses (Pote et al. 2000; Yokoyama et al. 2005). Astyanax Baird & Girard, 1854 is one of the most biodiverse fish genera among characids, with approximately 142 species described and widely distributed in the Neotropical region (Nelson et al. 2016). Astyanax spp. are popular in the international ornamental fish trade, aquaculture, and recreational fishing (de Lima et al. 2003). Although of commercial and ecological importance, only three species of m
Data Loading...
