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首页> 外文期刊>Journal of Molluscan Studies >PHYLOGEOGRAPHY OF THE LAND SNAIL ABIDA SECALE (DRAPARNAUD, 1801) (CHONDRINIDAE)
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PHYLOGEOGRAPHY OF THE LAND SNAIL ABIDA SECALE (DRAPARNAUD, 1801) (CHONDRINIDAE)

机译：陆上脊柱阿比达·塞科（DRAPARNAUD，1801年）的照相术

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摘要

Extreme morphological variation in the land snail Abida secale has been categorized in 17 currently recognized subspecies. Fourteen of these occur in a relatively small area of the species' range. Within this subspecies complex, based on shell morphological analyses, a 'ring-species' scenario has been postulated. To evaluate this scenario and to define (sub) species boundaries within the complex, the mitochondrial marker cytochrome oxidase I was analysed. The phylogeny reconstruction reveals two clades in Abida secale. These clades do not correspond to subspecies definitions based on shell morphological analyses. One clade of A. secale has A. attenuata, a morphologically well-defined species, as its sister taxon. These results could be explained by either incomplete lineage-sorting of the mitochondrial genome and/or by introgression of the A. attenuata mitochondrial genome into A. secale. Circumstantial evidence favours the second scenario. Whichever scenario has caused the observed pattern, the results of the mitochondrial DNA analyses do not show evidence of reduced gene flow between A. s. cadiensis and A. s. cadica. Since these two subspecies are the postulated 'ends' of the ring, there was no support for a ring-species scenario in Abida secale.
机译：蜗牛Abida secale的极端形态变化已归类为17个目前公认的亚种。其中有十四种发生在该物种范围的相对较小区域。在这种亚种复合物中，基于壳的形态学分析，已经提出了一种“环种”方案。为了评估这种情况并定义复合物中的（亚）物种边界，分析了线粒体标记细胞色素氧化酶I。系统发育重建揭示了Abida secale的两个进化枝。这些进化枝不符合基于壳形态分析的亚种定义。曲草的一个进化枝具有一种形态学上明确定义的物种-弱毒曲霉，作为其姊妹分类群。这些结果可以通过线粒体基因组的不完全谱系排序和/或通过将线粒体线粒体基因组渗入到第二种拟南芥中来解释。间接证据支持第二种情况。无论哪种情况导致了观察到的模式，线粒体DNA分析的结果均未显示出A. s。之间的基因流减少的证据。卡迪斯和A.卡迪卡。由于这两个亚种是环的假定“末端”，因此在Abida secale中不支持环种方案。

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