Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/244118
Type: Artigo de periódico
Title: Ultrastructure And Ssrrna Sequencing Of Myxidium Amazonense N. Sp A Myxosporean Parasite Of Corydoras Melini From The Rio Negro River, Amazonas State, Brazil
Author: Mathews
Patrick D.; Silva
Marcia R. M.; Maia
Antonio A. M.; Adriano
Edson A.
Abstract: In a survey of myxozoan parasites of ornamental freshwater fish from the Rio Negro river, it was found that seven of 30 (23.3 %) Corydoras melini specimens examined had plasmodia of a new Myxidium species (Myxidium amazonense n. sp.) in the gallbladder. The fish were caught in the Rio Negro river, in the municipality of Santa Isabel do Rio Negro, in the state of Amazonas, Brazil. The plasmodia had a tubular shape, which was organized as a spiral spring with several turns in the gallbladder. The development of the myxospores was asynchronic, with disporic pansporoblasts. Mature myxospores were elongated, with 17.0 +/- 0.9 (16.1-17.9) mu m in length and 3.7 +/- 0.7 (3.0-4.4) mu m in width, and lightly arcuate from the valval view, with their bodies tapering slowly until ending in rounded extremities. The valval surface had nine to ten grooves in each valve. The polar capsules, one at either end of the spore, had a length of 5.4 +/- 0.5 (4.9-5.9) mu m and a width of 3.4 +/- 0.6 (2.8-4.0) mu m. Ultrastructural analysis showed that the wall of the plasmodia had numerous microvilli-like structures, pinocytotic canals, and cytoplasmic bridges connecting the pansporoblasts to each other and to the ectoplasm zone. Phylogenetic analysis, based on a small subunit ribosomal RNA (ssrRNA), identified the new species as a sister species of Myxidiumceccarelli, the unique South American Myxidium species whose ssrRNA sequence is available in the NCBI database. This study is the first description of Myxidium species in ornamental freshwater fish from Amazon.
Subject: Myxozoa
Fish
Gallbladder
Bivalvulida
Teleostei
Morphology
Taxonomy
Butschli
Basin
Coast
Country: NEW YORK
Editor: SPRINGER
Citation: Ultrastructure And Ssrrna Sequencing Of Myxidium Amazonense N. Sp A Myxosporean Parasite Of Corydoras Melini From The Rio Negro River, Amazonas State, Brazil. Springer, v. 114, p. 4675-4683 DEC-2015.
Rights: fechado
Identifier DOI: 10.1007/s00436-015-4715-5
Address: http://link.springer.com/article/10.1007%2Fs00436-015-4715-5
Date Issue: 2015
Appears in Collections:Unicamp - Artigos e Outros Documentos

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