Myxidium ceccarellii n. sp (Myxosporea) from the gallbladder of Leporinus elongatus (Anastomidae) from the Sao Francisco River, Brazil

Myxidium ceccarellii n. sp (Myxosporea) from the gallbladder of Leporinus elongatus (Anastomidae) from the Sao Francisco River, Brazil

Author Adriano, Edson Aparecido Autor UNIFESP Google Scholar
Silva, Marcia Ramos Monteiro da Google Scholar
Atkinson, Stephen D. Google Scholar
Bartholomew, Jerri L. Google Scholar
Maia, Antonio Augusto Mendes Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Universidade Estadual de Campinas (UNICAMP)
Universidade de São Paulo (USP)
Oregon State Univ
Abstract During a survey of myxozoan parasites of freshwater fish from the Sao Francisco River in Minas Gerais State, Brazil, plasmodia of Myxidium ceccarellii n. sp. were found in gallbladders of two out of six specimens (22 %) of Leporinus elongatus (Anastomidae). Parasite plasmodia were translucent and greenish, with disporic sporoblasts that develop asynchronously. Mature myxospores were ellipsoidal in frontal and lateral views, with slightly pointed ends. the surfaces of each valve had four to six longitudinal grooves. Spores dimensions were as follows: length 17.7 +/- 0.5 mu m (17.1-18.1), width 10.4 +/- 0.47 m (9.8-11.3), and thickness 10.1 +/- 0.27 mu m (9.6-10.4). Two polar capsules, one at either end of the spore, had the length of 6.3 +/- 0.5 mu m (5.7-7.0) and width of 6.4 +/- 0.44 m (5.7-6.9), with four to five polar filament turns. Some aberrant spores had one or three polar capsules. Partial sequencing of M. ceccarellii n. sp. small subunit ribosomal RNA (ssrRNA) gene resulted in 1,845 bp. This is the first molecular study of a Myxidium species that parasitizes a South American freshwater fish. Phylogenetic reconstruction using ssrRNA gene sequences showed that M. ceccarellii n. sp. was positioned basally in a recognized clade of myxozoans that infect the biliary systems of nonfish vertebrates.
Keywords Myxozoa
Parasite
Freshwater fish
Myxidium
Leporinus
Taxonomy
Phylogeny
Brazil
Language English
Sponsor Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Grant number CNPq: 472747/2012-6
Date 2014-07-01
Published in Parasitology Research. New York: Springer, v. 113, n. 7, p. 2665-2670, 2014.
ISSN 0932-0113 (Sherpa/Romeo, impact factor)
Publisher Springer
Extent 2665-2670
Origin http://dx.doi.org/10.1007/s00436-014-3921-x
Access rights Closed access
Type Article
Web of Science ID WOS:000339965000028
URI http://repositorio.unifesp.br/handle/11600/37926

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