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Ceratocolax tavaresi n. sp. (Copepoda: Bomolochidae) parasitic in the Tomtate Grunt Haemulon aurolineatum Cuvier, 1830 (Actinopterygii: Haemulidae) off Rio de Janeiro, southeastern Brazil

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Abstract

Purpose

A new species of the genus Ceratocolax Vervoort, 1965 is described based on specimens collected from the Tomtate grunt Haemulon aurolineatum Cuvier, caught in the coast of Angra dos Reis, off the State of Rio de Janeiro, Brazil.

Methods

One hundred specimens of H. aurolineatum were purchased from the local fish market and examined for parasitic copepods. Parasites were fixed and preserved in 80% ethanol. Morphological features of the copepods were examined and drawn using an Olympus BX51 equipped with a drawing tube.

Results

Ceratocolax tavaresi n. sp. can be distinguished from all congeners by the following combination of characters in the adult female: (1) second endopodal segment of leg 3 with one seta, (2) lack of stout spinules along outer margins on rami of legs 2–4, (3) genital somite without flaplike structures, (4) terminal exopodal segment of leg 4 with seven elements; and in the adult male: (1) legs 1 to 4 with 3-segmented rami (except endopod of leg 4), (2) presence of a pair of blunt processes on dorsal surface of the third pedigerous somite, (3) second endopodal segment of leg 3 with one seta.

Conclusion

The number of species of Ceratocolax reported in the Atlantic Ocean was increased to three, including the new species. This is the forty-second species of copepod found parasitizing haemulid fish in marine waters from the Americas; however, the diversity of parasitic copepods off this continent is still underestimated.

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Acknowledgements

Fabiano Paschoal was supported by Fundação de Amparo à Pesquisa e ao Desenvolvimento Científico e Tecnológico do Maranhão (FAPEMA, Process no. 84516/2022), Brazil. José L. Luque was supported by a research fellowship from the Conselho Nacional de Desenvolvimento Científico e Tecnologico do Brazil (CNPq).

Funding

No funding was received for conducting this study.

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Authors and Affiliations

  1. Programa de Pós-Graduação em Ciências Veterinárias da Universidade Federal Rural do Rio de Janeiro, BR 465, Km 7, Seropédica, Rio de Janeiro, CEP, 23890-000, Brazil

    Taíssa Casanova

  2. Programa de Pós-Graduação em Biodiversidade e Conservação, Departamento de Oceanografia e Limnologia, Universidade Federal do Maranhão, Av. dos Portugueses, 1996, Bacanga, São Luís, MA, 65080-805, Brazil

    Fabiano Paschoal

  3. Departamento de Parasitologia Animal, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ, 23897-000, Brazil

    José Luis Luque

Authors
  1. Taíssa Casanova
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Contributions

FP and JLL performed field collections; FP and TC analyzed the copepods and prepared the illustrations; TC and FP prepared the main manuscript document; all authors reviewed the manuscript & approved the final version.

Corresponding author

Correspondence to José Luis Luque.

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Casanova, T., Paschoal, F. & Luque, J.L. Ceratocolax tavaresi n. sp. (Copepoda: Bomolochidae) parasitic in the Tomtate Grunt Haemulon aurolineatum Cuvier, 1830 (Actinopterygii: Haemulidae) off Rio de Janeiro, southeastern Brazil. Acta Parasit. 68, 903–912 (2023). https://doi.org/10.1007/s11686-023-00733-7

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