Abstract
A new species of parasitic copepod, Colobomatus deborae n. sp., belonging to the cyclopoid family Philichthyidae Vogt, 1877, is proposed based on adult female specimens collected from the interorbital canals of the Caitipa mojarra Diapterus rhombeus (Cuvier) (Gerreidae) from Sepetiba Bay, off the State of Rio de Janeiro, southeastern Brazil. The new species closely resembles six species of Colobomatus Hesse, 1873, but differs from these close congeners based on the combination of the following characters: lateral cephalic processes forked basally with sharp tips, midventral cephalic process representing about one third of the length of the laterals, thoracic processes forked and caudal rami with a pair of unequal processes. Together with the new species described in the present study, the philichthyid fauna of Brazil rises to 10 species reported from 14 Brazilian marine fish species. This is also the third report of Colobomatus in a gerreid fish, but the first species found parasitizing the genus Diapterus.
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Acknowledgments
Fabiano Paschoal was supported by Fundação de Amparo à Pesquisa e ao Desenvolvimento Científico e Tecnológico do Maranhão (FAPEMA, Process no. 84516/2022), Brazil. João V. Couto was supported by a student fellowship from Coordenação de Aperfeiçoamento de Pessoal do Ensino Superior (CAPES), Brazil. Felipe B. Pereira was supported by the Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG, Process no. APQ-01179-21). José L. Luque was supported by a research fellowship from the Conselho Nacional de Desenvolvimento Científico e Tecnologico do Brazil (CNPq).
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FP and JLL performed field collections; FP and JVC analyzed the copepods and prepared the illustrations; FP and FBP prepared the main manuscript document; all authors reviewed the manuscript & approved the final version.
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Paschoal, F., Couto, J.V., Pereira, F.B. et al. A new species of Colobomatus Hesse, 1873 (Copepoda: Philichthyidae) parasitic in the interorbital canals of the Caitipa mojarra Diapterus rhombeus (Cuvier, 1829) (Actinopterygii: Gerreidae) from Sepetiba Bay, southeastern Brazil. Syst Parasitol 100, 111–120 (2023). https://doi.org/10.1007/s11230-022-10074-0
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DOI: https://doi.org/10.1007/s11230-022-10074-0