Molecular systematics and phylogeography of the cryptic species complex Baetis rhodani (Ephemeroptera, Baetidae).
Molecular systematics and phylogeography of the cryptic species complex Baetis rhodani (Ephemeroptera, Baetidae).
复制标题
神秘物种复合体 Baetis rhodani（蜉蝣目，Baetidae）的分子系统学和系统发育地理学。
DOI：
10.1016/j.ympev.2006.03.004
复制
发表时间：
2006
影响因子：
4.1
通讯作者：
M. W. Bruford
中科院分区：
文献类型：
--
作者：
Helen Ceridwen Williams;S. J. Ormerod;M. W. Bruford
遗传学研究突出了包括水生昆虫在内的许多众所周知的分类群中隐秘的多样性，总体上意味着有比目前认识到的更多的物种。罗丹尼小蜂是一种分布最广、数量最多、具有重要生态意义的欧洲小蜂，被广泛用作溪流水质的生物学指标。传统的分类学和系统学从来没有完全解决罗丹尼群中可疑的神秘物种之间的差异，因为单凭形态特征不能进行可靠的区分。在幼虫中尤其如此，幼虫是监测中使用最广泛的生活期。在这里，我们评估了这个复合体的分子多样性，这是迄今为止对闪翅目神秘物种进行的最大规模的研究之一。利用线粒体细胞色素氧化酶亚基I(COI)基因的数据构建了系统发育图。恢复了两个单系群，包括一个主要单倍群和第二个由6个较小但不同的单倍群组成的分支。单倍群的差异在0.2-3%(范围内)到8-19%(其中)，后者的值超过了通常报道的其他昆虫的最大值，并为B.RODANI复合体中的隐蔽物种提供了强有力的证据。这七个单倍群的分类地位仍未确定。它们在西欧的分布没有显示出明显的地理模式，这表明自上一次冰川盛期以来遗传谱系的广泛扩散。考虑到现在似乎是几个分类群的生态和生物指示意义，这些发现的影响是深远的。
Genetic studies have highlighted cryptic diversity in many well-known taxa including aquatic insects, with the general implication that there are more species than are currently recognised. Baetis rhodani Pictet are among the most widespread, abundant and ecologically important of all European mayflies (Ephemeroptera), and used widely as biological indicators of stream quality. Traditional taxonomy and systematics have never fully resolved differences among suspected cryptic species in the B. rhodani complex because morphological characters alone do not allow reliable distinction. This is particularly true among larvae, the life-stage used most widely in monitoring. Here, we assess the molecular diversity of this complex in one of the largest such studies of cryptic species in the order Ephemeroptera to date. Phylogenies were constructed using data from the mitochondrial cytochrome oxidase subunit I (COI) gene. Two monophyletic groups were recovered consisting of one major haplogroup and a second clade of 6 smaller but distinct haplogroups. Haplogroup divergence ranged from 0.2–3% (within) to 8–19% (among) with the latter values surpassing maxima typically reported for other insects, and provides strong evidence for cryptic species in the B. rhodani complex. The taxonomic status of these seven haplogroups remains undefined. Their distributions across Western Europe reveal no obvious geographic pattern, suggesting widespread diffusion of genetic lineages since the last glacial maximum. The implications of these findings are far-reaching given the ecological and bioindicator significance of what now appears to be several taxa.
影响因子：
3.3
作者：
M. Slatkin;R. Hudson
通讯作者：
M. Slatkin;R. Hudson
非洲疟疾媒介冈比亚按蚊的遗传分化和分类地位问题。
影响因子：
3.3
作者：
Gentile,Gabriele;DellaTorre,Alessandra;Maegga,Bertha;Powell,JeffreyR;Caccone,Adalgisa
通讯作者：
Caccone,Adalgisa