Kulenkampff Kyle, Van Zyl Francois, Klaus Sebastian, Daniels Savel R
Department of Botany and Zoology, Private Bag X1, Stellenbosch University, Matieland, 7602, South Africa Stellenbosch University Stellenbosch South Africa.
Department of Ecology and Evolution, J. W. Goethe-University, Biologicum, Frankfurt am Main, Germany J. W. Goethe-University Frankfurt Germany.
Zookeys. 2019 Apr 15;838:133-154. doi: 10.3897/zookeys.838.32022. eCollection 2019.
We examined the impact of climatic fluctuations on the phylogeographic structure of the common slug eating snake () throughout its distribution in South Africa. The evolutionary history within the taxon was examined using partial DNA sequence data for two mitochondrial genes (ND4 + cyt ) in combination with a nuclear locus (SPTBN1). Phylogenetic relationships were investigated for both the combined mtDNA and total evidence DNA sequence data. In addition, population and demographic analyses together with divergence time estimations were conducted on the combined mtDNA data. Topologies derived from the combined mtDNA analyses and the total evidence analyses were congruent and retrieved five statistically well-supported clades, suggesting that represents a species complex. The five clades were generally allopatric, separated by altitudinal barriers and characterised by the absence of shared mtDNA haplotypes suggesting long term isolation. Divergence time estimations indicate that the diversification within the species complex occurred during the Plio/Pleistocene as a result of climatic fluctuations and habitat shifts for the species. A taxonomic revision of the species complex may be required to delineate possible species boundaries.
我们研究了气候波动对南非普通食蛞蝓蛇（）整个分布范围内系统地理结构的影响。利用两个线粒体基因（ND4 + cyt ）的部分DNA序列数据结合一个核基因座（SPTBN1），研究了该分类单元内的进化历史。对合并的线粒体DNA和总证据DNA序列数据进行了系统发育关系研究。此外，对合并的线粒体DNA数据进行了种群和人口统计学分析以及分歧时间估计。来自合并线粒体DNA分析和总证据分析的拓扑结构是一致的，并检索到五个统计学上得到充分支持的分支，这表明 代表一个物种复合体。这五个分支通常是异域分布的，被海拔障碍隔开，其特征是没有共享的线粒体DNA单倍型，表明长期隔离。分歧时间估计表明，该物种复合体的多样化发生在上新世/更新世期间，是该物种气候波动和栖息地变化的结果。可能需要对该物种复合体进行分类修订，以划定可能的物种界限。
