Mitochondrial genomes to the rescue - Diurodrilidae in the myzostomid trap
Mitochondrial genomes to the rescue - Diurodrilidae in the myzostomid trap
复制标题
DOI：
10.1016/j.ympev.2013.03.026
复制
发表时间：
2013-08-01
影响因子：
4.1
通讯作者：
Struck, Torsten H.
中科院分区：
文献类型：
--
作者：
Golombek, Anja;Tobergte, Sarah;Struck, Torsten H.
Diurodrilidae 是 Lophotrochozoa 的一个分类群，由大约 6 个纯间质物种组成，长度可达 500 pm，背腹扁平。传统上，Diurodrilidae 被认为是环节动物科。然而，最近，根据形态学和核 rRNA 数据，双尾兽科已被排除在环节动物门之外，并被置于与扁形动物类群更密切的关系中。由于双尾兽科和扁形动物类群在分子分析中都表现出长分支，因此密切的关系可能是由于长分支吸引伪影。使用核 rRNA 数据，环节动物类群 Myzostomida 被困在与扁动物类群类似的长分支吸引伪影中，但对 Myzostomids 几乎完整的线粒体基因组的测定揭示了它们的环节动物亲和力。因此，我们确定了 Diurodrilus subterraneus 几乎完整的线粒体基因组，以及 Diurodrilus subterraneus 和一些扁平动物类群的新核 rRNA 数据。我们对本文提出的核 rRNA 和线粒体序列以及基因顺序数据的所有分析都清楚地将 Diurodrilidae 置于环节动物内，并且在一些分析中具有强大的节点支持值。因此，先前提出的将双尾兽科排除在环节动物门之外及其与扁形动物类群的密切关系可归因于长分支伪影。形态学数据并不能明确支持双尾兽科的扁形动物亲和力，但也与环节动物内双尾兽科的后代起源一致。 (C) 2013 Elsevier Inc. 保留所有权利。
Diurodrilidae is a taxon of Lophotrochozoa comprising about six, exclusively interstitial species, which are up to 500 pm long and dorsoventrally flattened. Traditionally, Diurodrilidae had been regarded as an annelid family. However, recently Diurodrilidae had been excluded from Annelida and been placed in closer relationship to platyzoan taxa based on both morphological and nuclear rRNA data. Since both, Diurodrilidae and platyzoan taxa, exhibit long branches in the molecular analyses, the close relationship might be due to a long branch attraction artifact. The annelid taxon Myzostomida had been trapped in a similar long branch attraction artifact with platyzoan taxa using nuclear rRNA data, but determination of the nearly complete mitochondrial genome of myzostomids revealed their annelid affinity. Therefore, we determined the nearly complete mitochondrial genome of Diurodrilus subterraneus as well as new nuclear rRNA data for D. subterraneus and some platyzoan taxa. All our analyses of nuclear rRNA and mitochondrial sequence and gene order data presented herein clearly place Diurodrilidae within Annelida and with strong nodal support values in some analyses. Therefore, the previously suggested exclusion of Diurodrilidae from Annelida and its close relationship with platyzoan taxa can be attributed to a long branch artifact. Morphological data do not unambiguously support a platyzoan affinity of Diurodrilidae, but instead would also be in line with a progenetic origin of Diurodrilidae within Annelida. (C) 2013 Elsevier Inc. All rights reserved.