Description of two new species of Zosime (Copepoda: Harpacticoida: Zosimeidae), including remarks on its phylogeny and distribution on the Great Meteor Seamount plateau (North-east Atlantic Ocean)
Description of two new species of Zosime (Copepoda: Harpacticoida: Zosimeidae), including remarks on its phylogeny and distribution on the Great Meteor Seamount plateau (North-east Atlantic Ocean)
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DOI：
10.1080/00222933.2017.1355493
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发表时间：
2017-10
影响因子：
0.8
通讯作者：
Karin Pointner
中科院分区：
文献类型：
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作者：
Karin Pointner
摘要2010年POS397格罗梅特探险期间的定量采样使我们能够分析大流星海山(GMS)高原结缕虫科的群落结构。共鉴定出Zosime Boeck，1873年12种，中部11种，北部9种，南部10种。相似性和多样性分析表明，这些地区的群落结构没有差异。群落似乎不受地理特征的影响，区域间的相似性反映了均匀的泥沙结构和复杂的水流系统。Zosime可以被描述为单系进化，这是由于下颌的无形性的一节内足类，最多有四个刚毛。描述了两个新种。卡氏结缕草11月(Incrassata Group)是由周足类2-4的外足类1-3的外棘上的钝刺和周足类1-4的内足类3的最内侧远端分子的刺状本质来定义的。11月(典型类群)是由上足内足上的一个柔软的外部刚毛来定义的。由于这两个种都有一个八节的触角(目前已知的最具半形性的情况)，所以最近建立的羽化类群被归入模式类群。给出了物种水平上Zosime的最新检索表。Www.zoobank.org/urn:lsid:zoobank.org:pub:0BA28922-C575-4AAD-AD64-FDDBA22C34CC
ABSTRACT Quantitative sampling during the POS397 GroMet expedition in 2010 allowed analysis of the community structure of Zosimeidae on the Great Meteor Seamount (GMS) plateau. Twelve species of Zosime Boeck, 1873 were identified; 11 were recorded in the middle, nine in the northern, and 10 in the southern region. Similarity and diversity analyses showed no differences in community structure between these regions. The community seemed unaffected by geographical features; similarities between regions could reflect the uniform sediment structure and the complex water current system. Zosime can be characterised as monophyletic, due to the apomorphic one-segmented endopod of the mandible, armed with at most four setae. Two new species are described. Zosime carsteni sp. nov. (incrassata group) is defined by blunt spinules on the outer spines of exopods 1–3 of pereiopods 2–4 and the spinose nature of the innermost distal element of endopod 3 of pereiopods 1–4. Zosime eliasi sp. nov. (typica group) is defined by a flexible outer seta on the maxillipedal endopod. As both species bear an eight-segmented antennule (most plesiomorphic condition known so far), the recently erected anneae group is included into the typica group. An updated key of Zosime at the species level is given. www.zoobank.org/urn:lsid:zoobank.org:pub:0BA28922-C575-4AAD-AD64-FDDBA22C34CC