Molecular phylogeny and node time estimation of bioluminescent Lantern Sharks (Elasmobranchii: Etmopteridae)
Molecular phylogeny and node time estimation of bioluminescent Lantern Sharks (Elasmobranchii: Etmopteridae)
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DOI：
10.1016/j.ympev.2010.04.042
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发表时间：
2010-09-01
影响因子：
4.1
通讯作者：
Schliewen, Ulrich K.
中科院分区：
文献类型：
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作者：
Straube, Nicolas;Iglesias, Samuel P.;Schliewen, Ulrich K.
深海灯笼鲨（Etmopteridae）是角鲨目（Squaliformes）中最奇特的科。我们编制了广泛的 DNA 数据集，以估计该家族的第一个分子系统发育，并为这个神秘群体的起源和多样化提供节点年龄估计。基于 4685 bp 的核 (RAG1) 和线粒体基因（COI、12S-部分 16S、tRNAVal 和 tRNAPhe），系统发育推断得出了一致且得到充分支持的假设。单系翼科 Etmopteridae 起源于古新世早期 C/T 边界附近，并进一步分裂为四个形态不同的谱系，支持现存四个属中的三个属。例外的是 Etmopterus，它与 Miroscyllium 是并系的。随后在渐新世/中新世早期，Etmopterus 内的快速辐射伴随着生物发光侧翼标记的不同进化，这些标记在形态上表征了四个谱系。无法令人满意地鉴定更高的鳞状相互关系，但支持 Dalatiidae 和 Etmopteridae 中生物发光的趋同进化。 (C) 2010 Elsevier Inc. 保留所有权利。
Deep-sea Lantern Sharks (Etmopteridae) represent the most speciose family within Dogfish Sharks (Squaliformes). We compiled an extensive DNA dataset to estimate the first molecular phylogeny of the family and to provide node age estimates for the origin and diversification for this enigmatic group. Phylogenetic inferences yielded consistent and well supported hypotheses based on 4685 bp of both nuclear (RAG1) and mitochondrial genes (COI, 12S-partial 16S, tRNAVal and tRNAPhe). The monophyletic family Etmopteridae originated in the early Paleocene around the C/T boundary, and split further into four morphologically distinct lineages supporting three of the four extant genera. The exception is Etmopterus which is paraphyletic with respect to Miroscyllium. Subsequent rapid radiation within Etmopterus in the Oligocene/early Miocene was accompanied by divergent evolution of bioluminescent flank markings which morphologically characterize the four lineages. Higher squaliform interrelationships could not be satisfactorily identified, but convergent evolution of bioluminescence in Dalatiidae and Etmopteridae is supported. (C) 2010 Elsevier Inc. All rights reserved.