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Molecular Phylogeny of the Genus Lolliguncula Steenstrup, 1881 Based on Nuclear and Mitochondrial DNA Sequences Indicates Genetic Isolation of Populations from North and South Atlantic, and the Possible Presence of Further Cryptic Species

机译:基于核和线粒体DNA序列的1881年棒棒糖属的分子系统发生学研究表明,北大西洋和南大西洋种群的遗传分离以及可能存在的其他隐性物种

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摘要

Squid of the genus Lolliguncula Steenstrup, 1881 are small bodied, coastal species capable of tolerating low salinity. Lolliguncula sp. are found exclusively in the New World, although only one of the four recognized species (Lolliguncula brevis) occurs in the Atlantic Ocean. Preliminary morphological analyses suggest that Lolliguncula brevis populations in the North and South Atlantic may represent distinct species. The principal objective of the present study was to verify the phylogenetic relationships within the genus and test for the presence of possible cryptic species. Both gene and species tree topologies indicated that Lolliguncula brevis specimens from the North and South Atlantic represent distinct phylogenetic clades. In contrast with previous studies, L. panamensis was identified as the basal species of the genus. Our results provide important insights into the phylogenetic relationships among the Lolliguncula specimens analyzed, and confirm the genetic separation of Lolliguncula brevis populations of the North and South Atlantic at the level of sister species.
机译:Lolliguncula Steenstrup属的鱿鱼,1881年,是一种小型体质沿海物种,能够忍受低盐度。棒棒菌尽管四个公认的物种(短小棒菌)中只有一个出现在大西洋中,但它们仅在新大陆发现。初步的形态学分析表明,北大西洋和南大西洋的短棒棒菌种群可能代表不同的物种。本研究的主要目的是验证属内的系统发育关系并测试可能的隐性物种的存在。基因和物种树的拓扑结构均表明,来自北大西洋和南大西洋的短棒棒菌标本代表了不同的系统进化枝。与先前的研究相反,巴拿马乳杆菌被鉴定为该属的基础物种。我们的结果提供了重要的见解,分析之间的棒棒糖标本之间的系统发育关系,并确认了北大西洋和南大西洋的短棒棒糖种群在姐妹物种水平上的遗传分离。

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