Molecular phylogeny of black fungus gnats (Diptera: Sciaroidea: Sciaridae) and the evolution of larval habitats
Molecular phylogeny of black fungus gnats (Diptera: Sciaroidea: Sciaridae) and the evolution of larval habitats
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DOI：
10.1016/j.ympev.2012.11.008
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发表时间：
2013-03-01
影响因子：
4.1
通讯作者：
Lee, Seunghwan
中科院分区：
文献类型：
--
作者：
Shin, Seunggwan;Jung, Sunghoon;Lee, Seunghwan
基于最大似然法、最大简约法以及对 100 个类群（包括外群类群）的两个线粒体（COI 和 16S）和两个核（18S 和 28S）基因的 4809 bp 的贝叶斯分析，重建了 Sciaridae 科的系统发育。根据目前的系统发育分析，Sciaridae包括三个亚科和两个属群：Sciarinae、Chaetosciara组、Cratyninae和Pseudolycoriella组+ Megalosphyinae。我们的分子结果与之前基于属和亚科单系（Sciarinae、Megalosphyinae 和部分假定的“新亚科”）形态学数据的假设之一基本一致；然而，Cratyninae 亚科被证明是多系群，Bradysia、Corynoptera、Leptosciarella、Lycoriella 和 Phytosciara 属也被认为是非单系类群。根据贝叶斯推断，石螈科的祖先幼虫栖息地状态是死植物材料（植物凋落物+腐木），而植物螟虫和迟缓虫的共同祖先则被推断为活植物栖息地。因此，幼虫栖息地从死亡植物材料到活植物的转变可能在锯虫科中至少发生过一次。根据结果，我们讨论了科内的系统发育关系，并提出了幼虫栖息地发展的进化情景。 (C) 2012 Elsevier Inc. 保留所有权利。
The phylogeny of the family Sciaridae is reconstructed, based on maximum likelihood, maximum parsimony, and Bayesian analyses of 4809 bp from two mitochondrial (COI and 16S) and two nuclear (18S and 28S) genes for 100 taxa including the outgroup taxa. According to the present phylogenetic analyses, Sciaridae comprise three subfamilies and two genus groups: Sciarinae, Chaetosciara group, Cratyninae, and Pseudolycoriella group + Megalosphyinae. Our molecular results are largely congruent with one of the former hypotheses based on morphological data with respect to the monophyly of genera and subfamilies (Sciarinae, Megalosphyinae, and part of postulated "new subfamily"); however, the subfamily Cratyninae is shown to be polyphyletic, and the genera Bradysia, Corynoptera, Leptosciarella, Lycoriella, and Phytosciara are also recognized as non-monophyletic groups. While the ancestral larval habitat state of the family Sciaridae, based on Bayesian inference, is dead plant material (plant litter + rotten wood), the common ancestors of Phytosciara and Bradysia are inferred to living plants habitat. Therefore, shifts in larval habitats from dead plant material to living plants may have occurred within the Sciaridae at least once. Based on the results, we discuss phylogenetic relationships within the family, and present an evolutionary scenario of development of larval habitats. (C) 2012 Elsevier Inc. All rights reserved.