Phylogeny of the family Aglajidae (Pilsbry, 1895) (Heterobranchia: Cephalaspidea) inferred from mtDNA and nDNA
Phylogeny of the family Aglajidae (Pilsbry, 1895) (Heterobranchia: Cephalaspidea) inferred from mtDNA and nDNA
复制标题
DOI：
10.1016/j.ympev.2013.11.010
复制
发表时间：
2014-02-01
影响因子：
4.1
通讯作者：
Valdes, Angel
中科院分区：
文献类型：
--
作者：
Camacho-Garcia, Yolanda E.;Ornelas-Gatdula, Elysse;Valdes, Angel
海蛞蝓科包括几种底栖、肉食性的头盾目海蛞蝓，它们通常没有齿舌，有一个内壳，一个后盾，有短到中等的尾叶，头部有感觉纤毛。本研究报告的系统发育分析的基础上，线粒体基因16S和CO1和核基因H3，包括160标本的54种，证实了单系的Aglajidae以及大多数分类学建立的属，除了一些例外。虽然支持值是低的一些分支，分析恢复了以下分支内的Aglajidae：Odontoglaja，Nakamigawaia，和Melanochlamys。白屈菜属似乎是并系的，并且在贝叶斯分析中强烈支持白屈菜属Navanax Aglaja分支的单系性，加上四个单独的基因树中的三个（COI，没有第三密码子位置的COI，16S和H3）。然而，在最大似然分析的支持相对较低的水平，使我们无法提出的同步Navanax和Aglaja与Chelidonura。Melanochlamys是Chelidonura + Aglaja + Navanax的姐妹分支。Odontoglaja是基的其余的Aglajidae，证实了先前的假设，在Aglajidae的齿舌的损失。Nakamigawaia和Melanochlamys是单系的，应该保持有效。在贝叶斯分析和四个个体基因树中的三个中，Philinopsis的单系性得到了有力的支持。对这一类群的进一步研究，对于进一步肯定白屈菜属+阿格拉加属+纳瓦那属和拟扁尾藻属的单系性是必要的。根据系统发育分析的结果，可能有必要重新分类的Agrajidae的分类。额外的基因应该提供更多的信息，并可能完全解决这种情况。目前的分子研究（包括ABGD物种划分分析）表明，存在以前未发现的物种复合体，需要进一步研究，以确定无证生物多样性的程度。(C)2013 Elsevier Inc. All rights reserved.
The family Aglajidae includes several species of benthic, carnivorous cephalaspidean sea slugs, which generally lack a radula, have an internal shell, a posterior shield with short to moderate caudal lobes, and sensory cilia present on the head. The present study reports a phylogenetic analysis of the Aglajidae based on the mitochondrial genes 16S and CO1 and the nuclear gene H3, including 160 specimens of 54 species, that confirms the monophyly of Aglajidae as well as most taxonomically established genera, with some exceptions. Although support values are low for some clades, the analysis recovered the following clades within the Aglajidae: Odontoglaja, Nakamigawaia, and Melanochlamys. Chelidonura appears to be paraphyletic and the monophyly of a Chelidonura Navanax Aglaja clade is strongly supported in the Bayesian analysis, plus three of the four individual gene trees (COI, COI without 3rd codon positions, 16S and H3). However, the relatively low levels of support in the maximum likelihood analyses prevent us from proposing the synonymization of Navanax and Aglaja with Chelidonura. Melanochlamys is the sister clade of Chelidonura + Aglaja + Navanax. Odontoglaja is basal to the rest of the Aglajidae, confirming previous hypotheses on the loss of the radula in Aglajidae. Nakamigawaia and Melanochlamys are monophyletic, and should be maintained as valid. The monophyly of Philinopsis is strongly supported in the Bayesian analysis and in three of the four individual gene trees. Further research on this group is necessary to further affirm the monophyly of Chelidonura + Aglaja + Navanax and Philinopsis. Based on the results of this phylogenetic analysis, a reclassification of the taxonomy of Aglajidae is probably necessary. Additional genes should provide more information and probably fully resolve this situation. The present molecular study (including ABGD species delineation analyses) suggests the existence of previously undetected species complexes that require additional study to determine the extent of undocumented biodiversity. (C) 2013 Elsevier Inc. All rights reserved.