Emerging global novelty in phyllobothriidean tapeworms (Cestoda: Phyllobothriidea) from sharks and skates (Elasmobranchii)
Emerging global novelty in phyllobothriidean tapeworms (Cestoda: Phyllobothriidea) from sharks and skates (Elasmobranchii)
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DOI：
10.1093/zoolinnean/zlaa185
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发表时间：
2021-02-17
影响因子：
2.8
通讯作者：
Jensen, Kirsten
中科院分区：
文献类型：
--
作者：
Caira, Janine N.;Bueno, Veronica;Jensen, Kirsten
为最初使用分子序列数据发现的三个绦虫分支建立了新属。通过光镜和扫描电子显微镜对样品进行观察，确定了它们的形态特征。Rockacestus Gen.11月寄生于溜冰鞋。红曲霉属(Ruhnkeboith)11月寄生于锤头鲨。Yamaguticestus Gen.11月寄生在小型方形鲨鱼和猫鲨身上。这些属的新颖性得到了对28S rDNA基因D1-D3区的分类全面的分子系统发育分析的支持，加上新产生的序列数据，这是第一次包括叶绿体亚纲18个属中的15个属的代表以及3个新属。描述了来自大西洋西部、加利福尼亚州海湾、智利、福克兰群岛和南非的弹鳍动物的五个新种，以帮助划分新属。其中两个属为十种不确定属亲缘关系的猫鲨和溜冰鱼的叶绿藻目的动物提供了合适的属地，从而解决了长期存在的分类问题。鉴于这些属寄生于样本最差的一些棘鳃类群(即锤头鲨、方头鲨、猫鲨和溜冰鲨)，根据观察到的严格的宿主专一性，我们预测，对这些群中其他成员的进一步研究将在全球范围内在这三个属中产生多达200个新物种。这使得毛竹总科的属总数达到21个。
New genera are erected for three clades of tapeworms originally discovered using molecular sequence data. The morphological features of each are characterized after examination of specimens with light and scanning electron microscopy. Rockacestus gen. nov. parasitizes skates. Ruhnkebothrium gen. nov. parasitizes hammerhead sharks. Yamaguticestus gen. nov. parasitizes small squaliform sharks and catsharks. The novelty of these genera is supported by a taxonomically comprehensive molecular phylogenetic analysis of the D1-D3 region of the 28S rDNA gene, which, with the addition of newly generated sequence data, is the first to include representation of 15 of the 18 genera of phyllobothriideans plus the three new genera. Five new species are described from elasmobranchs in the western Atlantic Ocean, the Gulf of California, Chile, the Falkland Islands and South Africa to help circumscribe the new genera. Two of the genera provide appropriate generic homes for ten species of phyllobothriideans from catsharks and skates with uncertain generic affinities and thus resolve longstanding taxonomic issues. Given that these genera parasitize some of the most poorly sampled groups of elasmobranchs (i.e. hammerhead sharks, squaliform sharks, catsharks and skates), based on the strict degree of host specificity observed, we predict that further work on other members of these groups will yield as many as 200 additional species in these three genera of tapeworms globally. This brings the total number of genera in the Phyllobothriidea to 21.