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Monogeneans of the catfish Pimelodus blochii Valenciennes (Siluriformes: Pimelodidae) from the Brazilian Amazon, with a description of a new species of Ameloblastella Kritsky, Mendoza-Franco & Scholz, 2000 (Monogenea: Dactylogyridae)

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Abstract

Ameloblastella amazonica n. sp. (Monogenea: Dactylogyridae) collected on the gills of Pimelodus blochii Valenciennes (Siluriformes: Pimelodidae) from Rivers Acre and Iaco, State of Acre (Brazil) is described. The new species differs from the congeners mainly by the morphology of the dorsal bar, i.e. slightly U-shaped bearing a posteriorly directed flap, arising from the anterior edge of its middle third. The most morphologically similar congeners, A. paranaensis (França, Isaac, Pavanelli & Takemoto, 2003) and A. satoi Monteiro, Kritsky & Brasil-Sato, 2010, resemble A. amazonica n. sp. regarding the general structure of the copulatory complex; however, besides other features, they also differ from the new species because their hooks are similar in size (vs hooks with three different sizes). In addition to the dorsal bar lacking a flap, A. amazonica n. sp. can be differentiated from all congeners based on the combination of the following features: size of hooks (one or two different sizes), shape of the dorsal bar (other than slightly U-shaped), anchor points largely passing the level of superficial root (vs not or slightly passing it), number of MCO rings (other than 3–4) and structure of the articulation between the MCO base and the accessory piece (other than thick, medium-sized, smooth and tubular). Demidospermus leptosynophallus Kritsky & Gutierrez, 1998 and Scleroductus yuncensi Jara & Cone, 1989 were also found infesting P. blochii, both representing new host and locality records.

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Acknowledgements

The authors would like to thank Drs Marcelo Knoff and Daniela A. Lopes, Coleção Helmintológica do Instituto Oswaldo Cruz (CHIOC), for the loan of specimens and André Mota for preparing the line drawings. Thanks are also due to Dr Marcus Vinícius Domingues, Universidade Federal do Pará (Brazil), for the critical comments regarding some aspects of the study.

Funding

This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior-Brasil (CAPES)-Finance code 001. FBP was supported by a Post-doctoral fellowship PNPD-CAPES (Programa Nacional de Pós-Doutorado-Coordenação de Aperfeiçoamento de Pessoal de Nível Superior-CAPES, Brazil). Marcos Tavares-Dias was granted (# 303013/2015-0) a Research Fellowship from the National Council for Scientific and Technological Development (CNPq, Brazil).

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Authors and Affiliations

  1. Programa de Pós-Graduação em Biodiversidade e Biotecnologia (PPG-BIONORTE), Universidade Federal do Amapá Campus Universitário, Macapá, AP, 68903–419, Brazil

    Luciano P. Negreiros

  2. Embrapa Amapá, Macapá, AP, 68903–419, Brazil

    Marcos Tavares-Dias

  3. Programa de Pós-Graduação em Biologia Animal, Instituto de Biociências (INBIO), Universidade Federal de Mato Grosso do Sul (UFMS), Campo Grande, MS, 79070–900, Brazil

    Felipe B. Pereira

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  1. Luciano P. Negreiros
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  2. Marcos Tavares-Dias
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  3. Felipe B. Pereira
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Correspondence to Felipe B. Pereira.

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All procedures involving animals were permitted and were strictly according to the rules of the Sistema de Autorização e Informação em Biodiversidade (acronym SISBIO, No. 60899–1) and the Committee on Ethics of Animal Experiments of the Embrapa Amapá (Protocol No. 002- CEUA-CPAFAP).

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This article was registered in the Official Register of Zoological Nomenclature (ZooBank) as F2D721FF-84A7-4459-9CA3-AD03B85E5EB5. This article was published as an Online First article on the online publication date shown on this page. The article should be cited by using the doi number. This is the Version of Record.

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Negreiros, L.P., Tavares-Dias, M. & Pereira, F.B. Monogeneans of the catfish Pimelodus blochii Valenciennes (Siluriformes: Pimelodidae) from the Brazilian Amazon, with a description of a new species of Ameloblastella Kritsky, Mendoza-Franco & Scholz, 2000 (Monogenea: Dactylogyridae). Syst Parasitol 96, 399–406 (2019). https://doi.org/10.1007/s11230-019-09862-y

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