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Henneguya melini n. sp. (Myxosporea: Myxobolidae), a parasite of Corydoras melini (Teleostei: Siluriformes) in the Amazon region: morphological and ultrastructural aspects

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Abstract

A new species of myxozoan, Henneguya melini sp. n. (Myxosporea: Myxobolidae), was described based on morphologic and ultrastructural features. This is a parasite of the ornamental freshwater fish C. melini from the Rio Negro, and it was found in five of 30 (16.7 %) C. melini examined. The parasite was found in the gill filaments, and the plasmodia had form of round to ellipsoid, with mature and immature spores inside them. The average spore body was 15.5 ± 0.2 μm in length, 4.7 ± 0.1 μm in width, and the tail measured 25.3 ± 0.1 μm in length. The spores showed typical features of the genus Henneguya, with two valves of equal size and two symmetrical polar capsules of 4.8 ± 0.7 μm in length and 1.7 ± 0.3 μm in width. Each polar capsule had a polar filament with five to six turns. Based on morphology (morphologic and ultrastructural data) of the plasmodia and spores and the fact that this is the first report of a Henneguya species in a fish species of the genus Corydoras, it was considered a new myxozoan species.

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Acknowledgments

This study was supported by the Fundação de Amparo à Pesquisa do Estado de São Paulo - FAPESP (Proc. No. 2013/21374-6-Adriano E. A.). Mathews P.D. was supported by a doctoral scholarship from FAPESP (Proc. No. 2013/14656-5). Adriano E.A. received a research productivity grant from the Brazilian Fostering Agency CNPq (Proc. No. 305630/2013-0). CAPES (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior) provides support to the Doctoral Program in Animal Biology of UNICAMP. The authors thank Dr. Geraldo Bernardino, secretary of Fishing of the Amazonas State, for help in the logistic of the field works and Dr. Christopher Berger for reviewing the language of the text.

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Authors and Affiliations

  1. Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), Caixa Postal 6109, CEP 13083-970, Campinas, SP, Brazil

    Patrick D. Mathews & Edson A. Adriano

  2. Departamento de Ciências Básicas, Faculdade de Zootecnia e Engenharia de Alimentos, Universidade de São Paulo (USP), Rua Duque de Caxias Norte, 225, CEP 13635-900, Pirassununga, SP, Brazil

    Antônio A.M. Maia

  3. Departmento de Ciências Biológicas, Universidade Federal de São Paulo, Rua Professor Arthur Riedel, 275, Jardim Eldorado, 09972-270, Diadema, SP, Brazil

    Edson A. Adriano

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  1. Patrick D. Mathews
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Correspondence to Edson A. Adriano.

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Mathews, P.D., Maia, A.A. & Adriano, E.A. Henneguya melini n. sp. (Myxosporea: Myxobolidae), a parasite of Corydoras melini (Teleostei: Siluriformes) in the Amazon region: morphological and ultrastructural aspects. Parasitol Res 115, 3599–3604 (2016). https://doi.org/10.1007/s00436-016-5125-z

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