A new Southern Ocean species in the remarkable and rare amphipod family Podosiridae (Crustacea: Amphipoda) questions existing systematic hypotheses

A new Southern Ocean species in the remarkable and rare amphipod family Podosiridae (Crustacea: Amphipoda) questions existing systematic hypotheses
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南大洋罕见的片足类新物种 Podosiridae(甲壳纲:片足纲)对现有的系统假说提出了质疑

DOI:
10.1093/zoolinnean/zlz145
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发表时间:
2020
影响因子:
2.8
通讯作者:
Ashford O
Ashford O
中科院分区:
生物学2区
文献类型:
--
作者:
Ashford O

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双足动物Podosiridae家族的不同寻常之处在于,它结合了Podoceridae和Eusiridae两个不同家族的形态元素。在此,我们描述了从南奥克尼群岛和南设得兰群岛附近的南大洋采集的标本中的该科一新种。我们给出了这个物种和一个同属物种的线粒体(COI和16S)和核(18S)的核酸序列,并利用这些序列来研究Podosiridae在端足目中的系统发育位置。我们的研究结果并不能证明该科与该科或该科之间的亲缘关系密切,这表明这些科之间的表面相似性是形态趋同的结果。相反,Podosiridae可能与AmPhilochidira内的科关系更密切,如Stenothoidae。Podosiridae在端足目中的确切位置有待进一步的标本收集、更多的核苷酸数据(包括Hyperiopsidae和Vitjazianidae的序列)以及对这部分端足类系统发育关系的更直接分析。
The amphipod family Podosiridae is unusual in that it combines morphological elements of the disparate families Podoceridae and Eusiridae. Here, we describe a new species in the family from specimens collected from the Southern Ocean in the vicinity of the South Orkney Islands and South Shetland Islands. We present mitochondrial (COIand 16S) and nuclear (18S) nucleic acid sequences for this and a congeneric species and use these to investigate the phylogenetic placement of Podosiridae within the Amphipoda. Our results do not provide evidence for a close relationship between Podosiridae and Podoceridae or Eusiridae, suggesting that the superficial similarity between these families is the result of morphological convergence. Instead, it is likely that Podosiridae are more closely related to families within Amphilochidira, such as Stenothoidae. Definitive placement of Podosiridae in the Amphipoda awaits further specimen collection, additional nucleotide data (including sequences from the Hyperiopsidae and the Vitjazianidae) and a more directed analysis of relationships within this portion of the amphipod phylogeny.
来自澳大利亚新南威尔士州杰克逊港的新 Ampithoid 片脚类动物(甲壳纲:Ampithoid :Ampithoidae)
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发表时间: 1992
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DOI: 10.1093/molbev/msx281
发表时间: 2018-02-01
影响因子: 10.7
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DOI: 10.1093/molbev/mst010
发表时间: 2013-04
影响因子: 10.7
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Katoh K;Standley DM
通讯作者: Standley DM