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Systematic revision and phylogeny of the Polygordiidae Czerniavsky, 1881 (Annelida: Polychaeta) based on morphological and molecular methods

基于形态学和分子方法的 Polygordiidae Czerniavsky，1881（环节动物：多毛类）的系统修订和系统发育

基本信息

批准号：
172539176
负责人：
Dr. Dieter Fiege
金额：
--
依托单位：
Sektion Marine Evertebraten II
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2010
资助国家：
德国
起止时间：
2009-12-31 至 2013-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/172539176?language=en
关键词：
Systematic revision phylogeny Polygordiidae Czerniavsky

项目摘要

The proposed research aims at a systematic revision and an analysis of the phylogeny of the Polygordiidae, an ecologically and evolutionarily important polychaete group. Species of Polygordius are among the most abundant members of macrofaunal communities in coarse sand habitats and likely have a major impact on sediment chemistry as they occupy the interstices of sandy sediments and are highly motile. Despite this and several observations suggesting that some species may be particularly susceptible to short and long-term environmental changes this group is often missed or left unidentified in environmental surveys due to lack of available identification keys and defining polychaete characters. As morphological characters examined to date have been of limited diagnostic value for the distinction among Polygordius species some of the so-called cosmopolitan species may actually be comprised of several cryptic species and preliminary research suggests that species diversity within this group is largely underestimated. In the proposed project the status of all species currently known in this taxon will be clarified and species new to science will be described thus redefining the diversity of the taxon for the first time since its erection in 1881. For better distinction among species and understanding of the phylogeny, evolution and biogeography of the group we propose an integrative approach using molecular and morphological methods, i.e. DNA-sequencing and LM, SEM, TEM, and cLSM. Our results will be applicable to future research including further phylogenetic and cladistic analyses of polychaete systematics, and to the identification of species collected in environmental impact surveys. An up-to-date identification key to the Polygordiidae and a barcode for those species investigated will be produced. In addition to publications and presentations, data resulting from this research will be submitted to various web-based databases that are linked to major information systems for biodiversity and biogeography. Reference DNA-samples will be deposited in suitable collections for long-term storage and availability. A review of the results of the proposed research will be contributed to the new edition of the “Handbook of Zoology.

拟开展的研究旨在系统地修订和分析Polygordiidae，一个生态和进化上重要的多毛类类群的生殖发育。Polygordius是粗砂生境中大型底栖动物群落中最丰富的成员之一，可能对沉积物化学产生重大影响，因为它们占据桑迪沉积物的间隙，活动性很强。尽管这一点和一些观察表明，一些物种可能特别容易受到短期和长期环境变化的影响，但由于缺乏可用的识别码和定义多毛类特征，这一群体在环境调查中往往被遗漏或未被识别。由于形态特征检查到目前为止已经有限的诊断价值之间的区别Polygordius物种的一些所谓的世界性物种实际上可能是由几个神秘的物种和初步研究表明，在这个组的物种多样性在很大程度上被低估。在拟议的项目中，目前已知的所有物种在这个分类群中的地位将得到澄清，新的科学物种将被描述，从而重新定义分类群的多样性，自1881年成立以来的第一次。为了更好地区分物种和理解的发生，进化和种群的地理，我们提出了一个综合的方法，使用分子和形态学的方法，即DNA测序和LM，SEM，TEM，和cLSM。我们的研究结果将适用于未来的研究，包括进一步的系统发育和分支分析多毛类系统学，并在环境影响调查中收集的物种的识别。将编制一份最新的Polygordiidae识别检索表和一份所调查物种的条形码。除了出版物和介绍之外，这项研究产生的数据将提交给与生物多样性和植物地理学的主要信息系统相连的各种网络数据库。参考DNA样本将存放在适当的收藏品中，以供长期储存和使用。对拟议研究结果的回顾将贡献给新版的《动物学手册》。