Rapid radiation and cryptic speciation in Mediterranean triplefin blennies (Pisces:Tripterygiidae) combining multiple genes
Rapid radiation and cryptic speciation in Mediterranean triplefin blennies (Pisces:Tripterygiidae) combining multiple genes
复制标题
DOI：
10.1016/j.ympev.2005.04.021
复制
发表时间：
2005-12-01
影响因子：
4.1
通讯作者：
Pascual, M
中科院分区：
文献类型：
--
作者：
Carreras-Carbonell, J;Macpherson, E;Pascual, M
Triplephon属是地中海和大西洋东北部海岸的Triplephidae科的独特属。描述了三种四亚种：Tripterontripteronotus和Tripteronmelanurus（T. M. melanurus和T. M. minor）为地中海特有种，T delaisi（T. D. delaisi和T. D.黄体病）在这两个地区都有发现。我们使用了5个不同的基因（12 S，16 S，tRNA-val，COI和18 S）来阐明它们的分类地位和它们的系统发育关系。我们采用了不同的系统发育重建，产生不同的树拓扑结构。这种差异可能是由于物种形成过程使得重建高度支持的树变得困难。这三个物种之间的所有对比较显示出相同的遗传趋异，表明物种形成过程可能已经解决了快速辐射事件后，墨西拿盐度危机（5.2百万年），导致一个catenotomy。我们的分子数据显示，两个明确支持的分支T tripteronotus，其分歧大大超过了其他鱼类之间的发现，因此这两个群体应被视为两个神秘的物种之间的分歧2.75-3.32 Mya沿着上新世冰川。相反，没有一个研究的基因支持存在两个亚种的T melanurus。最后，Delaisi的两个亚种可能起源于第四纪气候波动时期（1.10-1.23 Mya），但其分布范围应重新界定。(c)2005年爱思唯尔公司All rights reserved.
The genus Tripterygion is the unique genus of the family Tripterygiidae in the Mediterranean Sea and in the northeastern Atlantic coast. Three species and four subspecies had been described: Tripterygion tripteronotus and Tripterygion melanurus (T. m. melanurus and T. m. minor) are endemic of the Mediterranean, and T delaisi (T. d. delaisi and T. d. xanthosoma) is found in both areas. We used five different genes (12S, 16S, tRNA-val, COI, and 18S) to elucidate their taxonomy status and their phylogenetic relationships. We employed different phylogenetic reconstructions that yielded different tree topologies. This discrepancy may be caused by the speciation process making difficult the reconstruction of a highly supported tree. All pair comparisons between these three species showed the same genetic divergence indicating that the speciation process could have been resolved by a rapid radiation event after the Messinian Salinity Crisis (5.2 Mya) leading to a trichotomy. Our molecular data revealed two clearly supported clades within T tripteronotus, whose divergence largely exceeded that found between other fish species, consequently these two groups should be considered two cryptic species diverging 2.75-3.32 Mya along the Pliocene glaciations. On the contrary, none of the genes Studied Supported the existence of two subspecies of T melanurus. Finally, the two Subspecies of T delaisi were validated and probably originated during the Quaternary climatic fluctuations (1.10-1.23 Mya), however their distribution ranges should be redefined. (c) 2005 Elsevier Inc. All rights reserved.