Abstract:
The tapeworms of fishes (Chondrichthyes and Actinopterygii) account one-third (1670 from around 5000) of the total tapeworm (Platyhelminthes: Cestoda) species diversity. In total 1186 species from 9 orders occur as adults in elasmobranchs (sharks, rays and chimaeras), and 484 species from 8 orders mature in ray-finned fishes (referred to here as teleosts). Teleost tapeworms are dominated by freshwater species (78%), but only 3% of elasmobranch tapeworms are known from freshwater rays of South America and Asia (Borneo). In the last 2 decades, vast progress has been made in understanding species diversity, host associations and interrelationships among fish tapeworms. In total, 172 new species have been described since 2017 (149 from elasmobranchs and 23 from teleosts; invalidly described taxa are not included, especially those from the Oriental region). Molecular data, however, largely limited to a few molecular markers (mainly 28S rDNA, but also 18S and cox1), are available for about 40% of fish tapeworm species. They allowed us to significantly improve our understanding of their interrelationships, including proposals of a new, more natural classification at the higher-taxonomy level (orders and families) as well as at the lower-taxonomy level (genera). In this review, we summarize the main advances and provide perspectives for future research.
摘要:
鱼类的tape虫(Chondrichthyes和Actinopterygii)占tape虫(Platyhelminthes:Cestoda)物种多样性的三分之一(约5000的1670)。在9个目中,总共有1186个物种以成虫的形式出现(鲨鱼,射线和嵌合体),和8个订单中的484种在鱼翅鱼类(此处称为硬骨鱼)中成熟。硬骨虫主要由淡水物种(78%),但是从南美和亚洲(婆罗洲)的淡水射线中只知道3%的弹性分支tape虫。在过去的20年里,在理解物种多样性方面取得了巨大的进步,宿主协会和鱼之间的相互关系。总的来说,自2017年以来,已经描述了172个新物种(149个来自弹性分支,23个来自硬骨鱼;不包括无效描述的分类单元,尤其是来自东方地区的人)。分子数据,然而,主要限于几个分子标记(主要是28SrDNA,还有18S和cox1),可用于约40%的鱼tape虫物种。它们让我们大大提高了对它们相互关系的理解,包括新的提案,在较高的分类学级别(订单和家庭)以及在较低的分类学级别(属)更自然的分类。在这次审查中,我们总结了主要进展,并为未来的研究提供了展望。