A new genus and a new species of microcotylids (Polyopisthocotyla, Platyhelminthes), gill parasite of the pink dentex Dentex gibbosus (Teleostei, Sparidae) off Tunisia and notes on Polyopisthocotyla and Monopisthocotyla from Dentex spp.
Ilhem Hamdi , Bouchra Benmansour , Mohammed Ahmed , Mehreen Gulsher , Chahinez Bouguerche
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引用次数: 0
Abstract
The study of the polyopisthocotylan parasites of marine fishes in the western Mediterranean is carried on using an integrative approach combining morphology and DNA barcodes. Ktarius patrickbrueli n. gen. n. sp (Polyopisthocotyla, Microcotylidae), from the gills of the pink dentex Dentex gibbosus (Teleostei, Sparidae) from the western Mediterranean Sea off Tunisia, is described. Anatomical and morphological features of the new genus are described, and the molecular barcodes for nuclear and mitochondrial markers (28S rRNA and cox1) are generated. The new genus is closely related to Microcotyle by sharing a symmetrical haptor, inverted question mark-shaped ovary and unarmed vagina. However, Ktarius n. gen. can be distinguished from Microcotyle and other Microcotylinae taxa by an unarmed male copulatory organ, formed by a long muscular cirrus, a basal layer of concentric muscles, and an elongated thick-walled ejaculatory bulb. A partial 28S rDNA sequence of K. patrickbrueli n. gen. n. sp. was obtained and found to be distinct from all known microcotylid sequences, with a p-distance of 5–13%. A phylogenetic tree constructed from available microcotylid sequences revealed that K. patrickbrueli n. gen. n. sp. clustered in a strongly supported clade of Microcotylinae, containing species of Omanicotyle, Bivagina, and Microcotyle confirming its belonging to the Microcotylinae subfamily. The cox1 sequences of K. patrickbrueli n. gen. n. sp. were highly divergent from the closely related genus Pauciconfibula and confirmed its distinction. This new genus is the third polyopisthocotylan genus to be described from sparids of Dentex.
采用形态学和 DNA 条形码相结合的综合方法，对地中海西部海洋鱼类的多肉孢子虫寄生虫进行了研究。本文描述了来自突尼斯附近地中海西部的粉红裸鲤 Dentex gibbosus（远洋鱼类，Sparidae）鳃中的 Ktarius patrickbrueli n. gen.描述了新属的解剖和形态特征，并生成了核和线粒体标记（28S rRNA 和 cox1）的分子条形码。该新属与 Microcotyle 亲缘关系密切，具有对称的触角、倒问号形子房和无臂阴道。然而，Ktarius n. gen. 与 Microcotyle 和其他 Microcotylinae 类群的区别在于其雄性交配器官无刺，由一个长的肌肉圈、一层同心的基底肌肉和一个拉长的厚壁射精管组成。获得了 K. patrickbrueli n. gen. n. sp.的部分 28S rDNA 序列，发现其与所有已知的微子囊虫序列不同，p-距离为 5-13%。根据现有的微子叶序列构建的系统发生树显示，K. patrickbrueli n. gen. n. sp.K. patrickbrueli n. gen. n. sp.的 cox1 序列与密切相关的 Pauciconfibula 属差异很大，证实了其与 Pauciconfibula 属的区别。这一新属是在 Dentex 的麻雀属中描述的第三个多裂藻属。
期刊介绍：
The International Journal for Parasitology: Parasites and Wildlife (IJP-PAW) publishes the results of original research on parasites of all wildlife, invertebrate and vertebrate. This includes free-ranging, wild populations, as well as captive wildlife, semi-domesticated species (e.g. reindeer) and farmed populations of recently domesticated or wild-captured species (e.g. cultured fishes). Articles on all aspects of wildlife parasitology are welcomed including taxonomy, biodiversity and distribution, ecology and epidemiology, population biology and host-parasite relationships. The impact of parasites on the health and conservation of wildlife is seen as an important area covered by the journal especially the potential role of environmental factors, for example climate. Also important to the journal is ''one health'' and the nature of interactions between wildlife, people and domestic animals, including disease emergence and zoonoses.
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