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First record of the hydromedusa Aequorea macrodactyla (Leptothecata: Aequoreidae) in Brazilian waters

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Abstract

Three Aequorea macrodactyla (Brandt 1835) medusae were found along the São Paulo and Rio de Janeiro coasts. The specimens clearly match the diagnosis of the species, as they have tentacular bulbs with a large abaxial keel and a prominent excretory pore and papilla. The number of tentacles is approximately three times smaller than the number of radial canals. In the southwestern Atlantic, this species was previously known from Patagonian waters and this is the first record from the non-temperate southwestern Atlantic. Additionally, a thorough review of meristic data is provided for this hydrozoan species.

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Acknowledgments

Drs. Maria Luisa Flaquer (Isa), Monica Petti, and Márcio (Bur) Hidekazu Ohkawara, and all the staff of the Biological Collection Prof. E.F. Nonato (Oceanographic Institute, São Paulo University) are acknowledged for allowing the first author to analyze their historical samples and to use their laboratory and photographic facilities. Thanks also go to Vitor Nardino and the Taxonline Program (Departamento de Zoologia-UFPR) for their photographic facilities, and to the two anonymous reviewers for the good suggestions provided for the improvement of this study. MNJ was supported by Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq, grant no. 140945/2007-5) and by Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP, grant no. 2011/09880-8). This investigation was partially supported by FAPESP (project no. 2011/21290-1).

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Authors and Affiliations

  1. Departamento de Sistemática e Ecologia, Universidade Federal da Paraíba, Cidade Universitária, João Pessoa, Paraíba, 58051-900, Brazil

    Miodeli Nogueira Júnior

  2. Instituto Oceanográfico, Universidade de São Paulo, Cidade Universitária, São Paulo, Brazil

    Frederico Pereira Brandini

  3. Departamento de Zoologia, Universidade Federal do Paraná, Curitiba, Paraná, Brazil

    Maria Angélica Haddad

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  1. Miodeli Nogueira Júnior
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  2. Frederico Pereira Brandini
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  3. Maria Angélica Haddad
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Correspondence to Miodeli Nogueira Júnior.

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Communicated by B. W. Hoeksema

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Nogueira Júnior, M., Brandini, F.P. & Haddad, M.A. First record of the hydromedusa Aequorea macrodactyla (Leptothecata: Aequoreidae) in Brazilian waters. Mar Biodiv 46, 737–742 (2016). https://doi.org/10.1007/s12526-015-0421-x

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