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.

中文翻译：

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Caligus madeirensis sp. 十一月 （桡足类：Caligidae）寄生在 Pompano，Trachinotus ovatus（Linnaeus，1758 年），来自东大西洋水域，葡萄牙马德拉群岛周围

介绍

根据从马德拉群岛附近的大西洋东部水域捕获的鲳鲳 ( Trachinotus ovatus (Linnaeus))采集的标本，描述了一种新的Caligus属物种。

方法

Pompano ( n  = 21) 是从当地鱼市场购买的，并检查了寄生桡足类动物。使用配备绘图管的 Olympus BX51 检查和绘制桡足类的形态特征。使用共聚焦激光扫描显微镜和扫描电子显微镜扫描关键诊断特征。

结果

Caligus madeirensis sp. nov.，可以通过以下特征的组合与所有同类（270 spp.）区分开来：（i）位于腿 1 远端外足节的 3 个外部末端棘上的附属突起，（ii）下颌骨14 颗牙齿，(iii) 一个胸骨分叉，带有平行的匙形尖齿，(iv) 一个上颌足，在爪基部有 2 个简单的刚毛，(v) 一个腿 3，第二个内足节，有 5 个羽状刚毛，(vi) 一个 2 -带有 I 的分段腿 4 外足类；III 脊柱公式，(vii) 一个雄性天线，在远端部分有 4 个重叠的板，(viii) 一个雄性上颌体，带有一个突出的粘液突，内缘饰有密集的波纹。

结论

与Caligus madeirensis sp。11 月，葡萄牙的Caligus动物群包括来自 17 种葡萄牙海洋鱼类的 13 种。考虑到目前在葡萄牙水域记录的大量海洋鱼类物种（510 种），似乎只有 3.3% 的葡萄牙海洋鱼类被发现感染了1758 年的Caligus OF Müller 属物种，其结果是，但是，可能是由于抽样有限。