A time-calibrated phylogeny of southern hemisphere stoneflies: Testing for Gondwanan origins
A time-calibrated phylogeny of southern hemisphere stoneflies: Testing for Gondwanan origins
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DOI：
10.1016/j.ympev.2015.10.028
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发表时间：
2016-03-01
影响因子：
4.1
通讯作者：
Waters, Jonathan M.
中科院分区：
文献类型：
--
作者：
McCulloch, Graham A.;Wallis, Graham P.;Waters, Jonathan M.
两个多世纪以来，生物地理学家一直试图解释为什么陆地或淡水谱系的地理分布被海洋打破，这些分离的分布要么归因于与冈德瓦南碎片化有关的替代，要么归因于跨大洋的扩散。石蝇(Plecoptera)是一种分布广泛的淡水昆虫目，其较差的扩散能力和对海水的不耐受性使它们成为冈德瓦群岛残余类群的理想候选者-其分布可以用冈瓦那群岛分裂导致的替代隔离来解释。在这里，我们用2864bp的线粒体(COI)(COI)和核(18S，H3)DNA重建了南半球石蝇(5科86属)之间的系统发育关系，并用一个校准的松弛分子钟来估计多样性的年代学。我们的分析表明，主要的热带石蝇亚目Arctperlaria(北半球)和South ctperlaria(南半球)大约形成于121 Ma(95%的先验概率分布107-143 Ma)，这可能反映了超大陆联合古陆的交代裂谷作用。随后，我们推断一个Arctoplaria谱系已经扩散到南半球76 Ma(95%的范围是65-98 Ma)。南美和澳大利亚石蝇血统的大部分分歧似乎与40 Ma左右Drake Passage的开放重合，这表明这些陆块的替代隔离可能是造成这些生物地理分离的原因。相比之下，新西兰谱系和它们的姐妹分类群之间的差异似乎晚于替代的时间框架，这意味着更新的扩散事件。(C)2015 Elsevier Inc.保留所有权利。
For more than two centuries biogeographers have attempted to explain why terrestrial or freshwater lineages have geographic distributions broken by oceans, with these disjunct distributions either attributed to vicariance associated with Gondwanan fragmentation or trans-oceanic dispersal. Stoneflies (order: Plecoptera) are a widespread order of freshwater insects whose poor dispersal ability and intolerance for salt water make them ideal candidates for Gondwanan relicts - taxa whose distribution can be explained by vicariant isolation driven by the breakup of Gondwana. Here we reconstruct the phylogenetic relationships among southern hemisphere stoneflies (5 families; 86 genera) using 2864 bp of mitochondria) (COI) and nuclear (18S, H3) DNA, with a calibrated relaxed molecular clock used to estimate the chronology of diversification. Our analysis suggests that largely antitropical stonefly sub-orders, Arctoperlaria (northern hemisphere) and Antarctoperlaria (southern hemisphere), were formed approximately 121 Ma (95% prior probability distribution 107-143 Ma), which may reflect the vicariant rifting of the supercontinent Pangaea. Subsequently, we infer that a single Arctoperlaria lineage has dispersed into southern hemisphere 76 Ma (95% range 65-98 Ma). The majority of divergences between South American and Australian stonefly lineages appear to coincide with the opening of Drake Passage around 40 Ma, suggesting vicariant isolation of these landmasses may be responsible for these biogeographic disjunctions. In contrast, divergences between New Zealand lineages and their sister taxa appear to postdate vicariant timeframes, implying more recent dispersal events. (C) 2015 Elsevier Inc. All rights reserved.