Molecular insights into the identification and phylogenetics of the cosmopolitan marine fish blood parasite, Haemogregarina bigemina (Adeleorina: Haemogregarinidae)
Molecular insights into the identification and phylogenetics of the cosmopolitan marine fish blood parasite, Haemogregarina bigemina (Adeleorina: Haemogregarinidae)
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DOI：
10.1016/j.ijppaw.2019.01.006
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发表时间：
2019-04-01
影响因子：
1.8
通讯作者：
Smit, Nico J.
中科院分区：
文献类型：
--
作者：
Hayes, Polly M.;Smit, Nico J.
二联血吸虫是海洋鱼类中最常见的血吸虫之一，长期以来一直被认为是一个神秘的和世界性的物种。然而，为了确定H. bigemina是否真正代表一个单一的全球种，或者是否应该划分为几个种或亚种，并确认其在血吸虫属中的分类地位，需要进行分子分析。在这里，我们提供了H的第一个分子特征。在英国，使用18 S rDNA序列，从其模式宿主之一，Lipophrys pholis中分离出二联种。系统发育和p-距离比较新产生的H。bigemina序列与其他haemoglycine类群和相关apicomplexans的序列表明，H. bigemina福尔斯属于“Haemogelina”分支之外，也完全属于Adeleorina，形成一个单独的顶复门海洋分支，并且似乎实际上与其他非haemogelineApicomplexa属更密切相关。进一步的工作包括H. bigemina和H.现在需要进一步研究在其他地方从鱼类中观察到的双孢类寄生虫。
Haemogregarina bigemina is one of the most prevalent haemogregarines of marine fishes and has long been considered an enigmatic and cosmopolitan species. However, to determine whether H. bigemina truly represents a single global species, or whether it should be partitioned into several species or subspecies, and to confirm its taxonomic status among the Haemogregarina, molecular analysis is required. Here, we provide the first molecular characterisation of H. bigemina from one of its type hosts, Lipophrys pholis, in the UK using 18S rDNA sequences. Phylogenetic and p-distance comparisons of the newly generated H. bigemina sequences with those published from other haemogregarine taxa and related apicomplexans suggest that H. bigemina falls outside of the "Haemogregarina" clade as well as the Adeleorina altogether, forming a separate apicomplexan marine clade, and appears to be in fact more closely related to other non-haemogregarine Apicomplexa genera. Further work including sequences of H. bigemina and H. bigemina-like parasites observed from fishes in other localities is now needed to investigate this further.