Caligus madeirensis sp. nov. (Copepoda: Caligidae) Parasitic on Pompano, Trachinotus ovatus (Linnaeus, 1758), from Easte
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ORIGINAL PAPER
Caligus madeirensis sp. nov. (Copepoda: Caligidae) Parasitic on Pompano, Trachinotus ovatus (Linnaeus, 1758), from Eastern Atlantic Waters, Surrounding the Madeira Archipelago, Portugal Ilhem Hamdi1 · Margarida Hermida2 · Seyit Ali Kamanli3 · Bouchra Benmansour1 · Argun Akif Özak4 · Geoffrey Allan Boxshall5 Received: 28 April 2020 / Accepted: 22 September 2020 © Witold Stefański Institute of Parasitology, Polish Academy of Sciences 2020
Abstract Introduction A new species of the genus Caligus is described based on specimens collected from pompano, Trachinotus ovatus (Linnaeus), caught in eastern Atlantic waters, near the Madeira archipelago. Methods Pompano (n = 21) were purchased from the local fish market and examined for parasitic copepods. Morphological features of the copepods were examined and drawn using an Olympus BX51 equipped with a drawing tube. Key diagnostic characters were scanned using a confocal laser scanning microscope and a scanning electron microscope. Results Caligus madeirensis sp. nov., can be distinguished from all congeners (270 spp.) by the combination of the following characters: (i) an accessory process on the 3 outer terminal spines located on the distal exopodal segment of leg 1, (ii) a mandible with 14 teeth, (iii) a sternal furca with parallel, spatulate tines, (iv) a maxilliped with 2 simple setae at base of a claw, (v) a leg 3 with second endopodal segment with 5 pinnate setae, (vi) a 2-segmented leg 4 exopod with I; III spine formula, (vii) a male antenna with 4 overlapping plates on the distal segment, (viii) a male maxilliped corpus bearing a prominent myxal process ornamented with dense corrugations along inner margin. Conclusion Together with Caligus madeirensis sp. nov., the Caligus fauna of Portugal consists of 13 species reported from 17 Portuguese marine fishes. Considering the large number of marine fish species (510 spp.) currently recorded from Portuguese waters it seems that only 3.3% of the Portuguese marine fishes have been found to be infested with species of the genus Caligus O.F. Müller, 1758, the result of which, however, might be due to limited sampling. Keywords Parasite · Copepod · Caligus · Portugal · Marine fish
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11686-020-00290-3) contains supplementary material, which is available to authorized users. * Argun Akif Özak [email protected]; [email protected] Ilhem Hamdi [email protected] Margarida Hermida margarida.hermida@mare‑centre.pt Seyit Ali Kamanli [email protected] Bouchra Benmansour [email protected] Geoffrey Allan Boxshall [email protected]
1
Laboratory of Biodiversity, Parasitology and Ecology of Aquatic Ecosystems, Faculty of Sciences of Tunis, University of Tunis El Manar, 2092 Tunis, Tunisia
2
Oceanic Observatory of Madeira, Agência Regional Para O Desenvolvimento da Investigação Tecnologia E Inovação. Edifício Madeira Tecnopolo, Funchal, Portugal
3
Department of Biology, Faculty
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