Cladistic analysis of the calanoid Copepoda
Cladistic analysis of the calanoid Copepoda
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DOI：
10.1071/is10007
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发表时间：
2010-01-01
影响因子：
2.2
通讯作者：
Ohtsuka, Susumu
中科院分区：
文献类型：
--
作者：
Bradford-Grieve, Janet M.;Boxshall, Geoff A.;Ohtsuka, Susumu
哲水蚤桡足类是海洋、半咸水和淡水浮游生物的非常成功的居民。至少有一个范例，通常是一个公认的近形物种。Epacteriscidae是所有其他哲水蚤桡足类的姐妹-这一观察结果对包括Ridgewayiidae在内的Epacteriscoidea的概念提出了质疑。证实了Augaptiloidea、Centropagoidea、Clausocalanoidea和Pseudocyclopoidea的单系性。目前的分析表明，可能有两个主要分支，一个包括Augaptiloidea，Centropagoidea，可能还有Pseudocyclopoidea和Ridgewayiidae，另一个包括Megacalanidae，Calanidae/Paracalanidae，Eucalanoidea，Ryocalanoidea，Spinocalanoidea和Clausocalanoidea。Pseudocyclopidae，Boholinidae和Ridgewayiidae的Centropagoidea/Augaptiloidea分支的关系得到了低节点的支持。提出了一个扩大的总科（包括Fosshageniidae）的单系性。没有检索到单系巨水蚤总科。推断的祖先哲水蚤的性质进行了讨论。新的进化序列被提出用于女性生殖器（包括几次精液贮器的丢失和恢复，以及生殖器盖的独立丢失-一旦丢失就永远不会恢复）和腿1内足。在哲水蚤目的进化过程中，幼形是一个占主导地位的过程。
Calanoid copepods are extremely successful inhabitants of marine, brackish and freshwater plankton. is represented by at least one exemplar, typically a recognised plesiomorphic species. The Epacteriscidae are sister to all other calanoid copepods - an observation that brings into question the concept of an Epacteriscoidea that includes the Ridgewayiidae. The monophyly of the Augaptiloidea, Centropagoidea, Clausocalanoidea and Pseudocyclopoidea is corroborated. The current analysis suggests there may be two major clades, one containing the Augaptiloidea, Centropagoidea and possibly the Pseudocyclopoidea and Ridgewayiidae and the other including the Megacalanidae, Calanidae/Paracalanidae, Bathypontioidea, Eucalanoidea, Ryocalanoidea, Spinocalanoidea and Clausocalanoidea. The relationships of the Pseudocyclopidae, Boholinidae, and Ridgewayiidae to the Centropagoidea/Augaptiloidea clade received low nodal support. Monophyly of an enlarged Bathypontioidea (including the Fosshageniidae) is proposed. Amonophyletic Megacalanoidea is not retrieved. The nature of the inferred ancestral Calanoida is discussed. New evolutionary series are proposed for the female genitalia (including several losses and regaining of seminal receptacles, and independent losses of the genital operculum - once lost it is never regained) and leg 1 endopod. Paedomorphosis appears to be a dominant process in the evolution of the Calanoida.