Mitochondrial genomics of ostariophysan fishes: Perspectives on phylogeny and biogeography
Mitochondrial genomics of ostariophysan fishes: Perspectives on phylogeny and biogeography
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DOI：
10.1007/s00239-002-2417-y
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发表时间：
2003-04-01
影响因子：
3.9
通讯作者：
Nishida, M
中科院分区：
文献类型：
--
作者：
Saitoh, K;Miya, M;Nishida, M
Ostariophysi是Teleostei中的第二大超目。它包括五个目：淋病形目、鲤形目、特征目、丝光形目和裸子形目。解决鱼类之间的高级关系有助于解决基本的硬骨分化问题，并为主要淡水鱼类群的历史生物地理分析提供依据。在这项研究中，我们报告了11种硬骨鱼的完整线粒体（mt） DNA序列，以及包括这些鱼和其他4种硬骨鱼和9种非硬骨鱼在内的系统发育分析结果。极大似然分析和极大简约分析再次证实了俱乐部形式是动物的近亲。然而，淋病虫更接近于棍棒虫而不是耳虫（除淋病虫外的器官物理学类群），因此对器官物理学的当前定义提出了一个问题。耳头类动物的基础关系缺乏明确，这意味着这种分化发生在很短的时间内。可以想象，这里研究的鲤形、特征形（特征形、丝光形和裸子形）和目或超目之外的目或超目的单一性被重建了。系统发育假说认为耳兽起源于泛古宙。在特征体中，裸子形和智慧形具有独立的进化起源和与特征体相当或更古老的进化历史。这有助于解释目前特征的地理分布。
Ostariophysi is the second largest superorder within Teleostei. It contains five orders: Gonorynchiformes, Cypriniformes, Characiformes, Siluriformes, and Gymnotiformes. Resolving the higher-level relationships among ostariophysan and related fishes will aid in resolving basal teleostean divergence and provide basis to historical biogeographic analysis of major freshwater fish groups. In this study, we report the complete mitochondrial (mt) DNA sequences for eleven ostariophysan fishes and the results of phylogenetic analyses including these species plus four other ostariophysan and nine nonostariophysan teleostean fishes. Maximum likelihood and maximum parsimony analyses reconfirmed clupeiforms as the closest relatives of ostariophysans. However, gonorynchiforms were closer to clupeiforms than to otophysans (ostariophysan groups excluding gonorynchiforms), thus raising a question over the current definition of Ostariophysi. The lack of clarity in otocephalan (ostariophysans, + clupeiforms) basal relationships implies that such divergence took place over a short period of time. The monophyly of cypriniforms, characiphysans (characiforms, siluriforms, and gymnotiforms), and orders or superorders outside the ostariophysans examined here were conceivably reconstructed. The phylogenetic hypothesis suggests a Pangean origin of otophysans. Within characiphysans, gymnotiforms and siluriforms have independent evolutionary origins and evolutionary histories comparable to or older than that of characiforms. This helps to explain the present geographic distribution of characiphysans.