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Exogone Ørsted, 1845 (Annelida: Syllidae: Exogoninae) from Brazilian oceanic islands, with description of a new species and notes on possible hidden diversity in the genus

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Abstract

Valuable efforts have been made to describe the diversity of Syllidae Grube, 1850 in Brazilian waters, but only recently, taxonomic accounts of the family from oceanic islands began to be published. Here we reported five species of Exogone Ørsted, 1845 from Rocas Atoll, Fernando de Noronha and Trindade Islands. Exogone rocassp. nov. is described and Exogone simplex Hartmann-Schröder, 1960 (described and illustrated), Exogone africana Hartmann-Schröder, 1974, Exogone breviantennata Hartmann-Schröder, 1959, and Exogone naidinoides Westheide, 1974 are reported for the first time from Brazilian oceanic islands. Finally, we make considerations about the use of only morphology to identify these species, the doubts on the species records and the possible presence of sibling species under their currently reported distribution range.

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Acknowledgements

We are grateful to Marcos Tavares (MZUSP), coordinator of the ProTrindade Project (CNPq 403940/2012-5 and FAPESP 2016/50373-6), who made the specimens of [E. breviantennata and E. naidinoides] available for study and to Joel Braga de Mendonça Jr. for conducting the field work at the Trindade Island. This is the contribution number 5 of the ProTrindade Project. Thanks are due to Angelika Brandt (then at ZMH), Jávier Sánchez Almazán (MNCN), Karen Osborn and Geoff Keel (USNM) and the staff of the respective museums for all the support during visits of MVF to the institutions. We are thankful to SISBIO—Brazilian Ministry of Environment (MMA) which provided a license/permit (under the number: 53344) to the sampling organisms in the field. This paper is part of the Ph.D. requirements of Rodolfo Leandro Nascimento Silva at the Biodiversity and Evolutionary Biology Graduate Program of the Federal University of Rio de Janeiro.

Funding

A PhD fellowship was provided by Coordenadoria de Aperfeiçoamento de Pessoal de Nível Superior (CAPES procs. 1541399) to RLN. FAPESP provided support to MVF (procs. 2010/19424-7 and 2014/11549-6), and a grant was provided by Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq, Brazil) to PCP (grants numbers: 443900/2014-0 and 303939/2014-1).

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Authors and Affiliations

  1. Laboratório de Polychaeta, Departamento de Zoologia, Instituto de Biologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil

    Rodolfo Leandro Nascimento & Paulo Cesar De Paiva

  2. Programa de Pós – graduação em Biodiversidade e Biologia Evolutiva, Instituto de Biologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil

    Rodolfo Leandro Nascimento & Paulo Cesar De Paiva

  3. Museu de Zoologia, Universidade de São Paulo, São Paulo, Brazil

    Marcelo Veronesi Fukuda

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  1. Rodolfo Leandro Nascimento
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Correspondence to Rodolfo Leandro Nascimento.

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All applicable international, national, and/or institutional guidelines for the care and use of animals were followed by the authors.

Sampling and field studies

All necessary permits for sampling and observational field studies have been obtained by the authors from the competent authorities and are mentioned in the acknowledgements, if applicable.

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All authors conceived and designed the research. RLN collected some specimens and PCP and MVF made other specimens available. RLN analyzed the data and did the illustrations. MVF and PCP supervised the research and analyses. RLN and MVF wrote the manuscript. All authors contributed critically to the drafts and gave final approval for publication.

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Nascimento, R.L., Fukuda, M.V. & Paiva, P.C.D. Exogone Ørsted, 1845 (Annelida: Syllidae: Exogoninae) from Brazilian oceanic islands, with description of a new species and notes on possible hidden diversity in the genus. Mar. Biodivers. 50, 32 (2020). https://doi.org/10.1007/s12526-020-01055-x

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