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Species delimitation analyses of NE Atlantic Chaetozone (Annelida, Cirratulidae) reveals hidden diversity among a common and abundant marine annelid.
Molecular Phylogenetics and Evolution ( IF 3.6 ) Pub Date : 2020-05-14 , DOI: 10.1016/j.ympev.2020.106852 Maël Grosse 1 , Torkild Bakken 2 , Arne Nygren 3 , Jon A Kongsrud 4 , María Capa 5
Molecular Phylogenetics and Evolution ( IF 3.6 ) Pub Date : 2020-05-14 , DOI: 10.1016/j.ympev.2020.106852 Maël Grosse 1 , Torkild Bakken 2 , Arne Nygren 3 , Jon A Kongsrud 4 , María Capa 5
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The polychaetes of the family Cirratulidae (Annelida) are common inhabitants in continental shelf benthic environments and considered an important group of organisms in environmental monitoring surveys. The family represents a taxonomic and systematic challenge, as monophyly of genera and evolutionary relationships within the family remain to be explored in a proper phylogenetic framework. Bitentaculate cirratulids, especially the genus Chaetozone, form one of the most species-diverse group of polychaetes worldwide. In this study, we aimed at evaluating the species diversity of the genus Chaetozonein benthic environments in the North East Atlantic by molecular means. We tested whether traditional morphological diagnostic characters are able to discriminate between the species hypothesis after species delimitation analyses, and assessed monophyly of the genera involved. Two DNA markers were sequenced from about 200 specimens belonging to Chaetozone, Aphelochaeta, Dodecaceria, Cirriformia and Cirratulus - the universal mitochondrial barcoding region COI, and the D1-D2 regions of the nuclear 28S rRNA - and analyzed with Bayesian inference, Maximum Likelihood and the species delimitation methods mPTP and GMYC. The first phylogeny of the family Cirratulidae is inferred and the genera Chaetozone, Dodecaceria and Cirratulus are recovered monophyletic. A total of 14 clusters of sequences - corresponding to species of Chaetozone - were found in the study area, and only one of them is here referred to a nominal species, Chaetozone setosa. Our results reveal several species complexes in the genus Chaetozone, that some of these independent lineages are unnamed and undescribed, and that morphological diagnostic features are in most cases unable to discriminate between the most similar species.
中文翻译：
NE Atlantic Chaetozone（Annelida，Cirratulidae）的物种划界分析揭示了一个常见而丰富的海洋象鼻虫之间隐藏的多样性。
Cirratulidae（Annelida）家族的多毛cha是大陆架底栖环境中的常见居民，在环境监测调查中被视为重要的生物群。该家族代表着分类学和系统的挑战，因为该家族的属型和进化关系的单方面性尚待在适当的系统发育框架中进行探讨。齿状卷毛，尤其是Chaetozone属，是世界上种类最多的多毛类动物之一。在这项研究中，我们旨在通过分子手段评估东北大西洋底栖环境中Chaetozone属的物种多样性。我们测试了传统的形态学诊断特征是否能够在进行物种划界分析之后区分物种假设，并评估所涉属的单性。从属于Chaetozone，Aphelochaeta，Dodecaceria，Cirriformia和Cirratulus的大约200个样本中测序了两个DNA标记-通用线粒体条形码区域COI和28S rRNA核的D1-D2区域-并用贝叶斯推断，最大似然和物种定界方法mPTP和GMYC。推断出Cirratulidae科的第一个系统发育，并恢复了Chaetozone，Dodecaceria和Cirratulus属。在研究区域中发现了总共14个序列簇-对应于Chaetozone的物种，在此仅将其中一个称为名义物种Chaetozone setosa。我们的结果揭示了Chaetozone属中的几种物种复合体，其中一些独立的谱系未命名且未描述，
更新日期：2020-05-15
中文翻译：
NE Atlantic Chaetozone（Annelida，Cirratulidae）的物种划界分析揭示了一个常见而丰富的海洋象鼻虫之间隐藏的多样性。
Cirratulidae（Annelida）家族的多毛cha是大陆架底栖环境中的常见居民，在环境监测调查中被视为重要的生物群。该家族代表着分类学和系统的挑战，因为该家族的属型和进化关系的单方面性尚待在适当的系统发育框架中进行探讨。齿状卷毛，尤其是Chaetozone属，是世界上种类最多的多毛类动物之一。在这项研究中，我们旨在通过分子手段评估东北大西洋底栖环境中Chaetozone属的物种多样性。我们测试了传统的形态学诊断特征是否能够在进行物种划界分析之后区分物种假设，并评估所涉属的单性。从属于Chaetozone，Aphelochaeta，Dodecaceria，Cirriformia和Cirratulus的大约200个样本中测序了两个DNA标记-通用线粒体条形码区域COI和28S rRNA核的D1-D2区域-并用贝叶斯推断，最大似然和物种定界方法mPTP和GMYC。推断出Cirratulidae科的第一个系统发育，并恢复了Chaetozone，Dodecaceria和Cirratulus属。在研究区域中发现了总共14个序列簇-对应于Chaetozone的物种，在此仅将其中一个称为名义物种Chaetozone setosa。我们的结果揭示了Chaetozone属中的几种物种复合体，其中一些独立的谱系未命名且未描述，
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