Systematics, Biodiversity and Biogeography of Southern Ocean Uristidae (Amphipoda: Lysianassoidea): An integrative approach

南大洋Lysianassoidea（片足纲：甲壳纲）是底栖生物群落中种类最丰富的分类群之一，在南极食物网中起着重要的作用。尽管这些有利的特征可能使这些底栖育雏鱼成为南大洋底栖生物进化和生态研究的理想模式分类群，但它们在这方面的作用受到它们有问题的系统地位的阻碍。这是由于在lysianasso总科中，特别是在Uristidae科中，只有很少的了解和信息丰富的表型特征。拟议的合作项目有两个主要目标。第一个目标是修改南大洋Uristidae的系统分类。一个特别的目标将是用遗传方法检测目前被忽视的物种，用现代形态计量学方法搜索信息特征，并基于这两种方法修改尿路系统发育系统。我们将创建开放获取的确定密钥，并积极参与正在进行的南极海洋生物条形码工作。该项目的第二个目标是在南极洲地质和气候历史的背景下解决有关南大洋Uristidae的起源和辐射的进化问题。具体地说，我们将统计地检验起源和辐射的竞争情景以及选定物种的生物地理分布，并制定新的假设。

Southern Ocean Lysianassoidea (Amphipoda: Crustacea) belong to one of the most diverse and abundant taxa in benthic communities and play an important role in Antarctic food webs. Despite these advantageous features that would potentially make these benthic brooders an ideal model taxon for evolutionary and ecological studies in Southern Ocean benthic organisms, their usefulness in such is hampered by their problematic systematic status. This is due to only few understood and informative phenotypic characters in the Lysianassoidea and in particular in the family Uristidae. The proposed collaborative project has two major objectives. The first objective is to revise the systematics of the Southern Ocean Uristidae. A particular aim will be to detect presently overlooked species with genetic methods, search for informative characters using modern morphometric methods and to revise the uristid phylogenetic system based on both approaches. We will create open access determination keys and actively contribute to on-going barcoding efforts of Antarctic marine life. The second objective of the project is to address evolutionary questions regarding the origin and radiation of Southern Ocean Uristidae in the context of the geological and climatic history of Antarctica. Specifically, we will statistically test competing scenarios of origin and radiation as well as of biogeographic distribution for selected species and formulate new hypotheses.