Sperm whale phylogeny revisited: Analysis of the morphological evidence
Sperm whale phylogeny revisited: Analysis of the morphological evidence
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DOI：
10.1111/j.1748-7692.1997.tb00086.x
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发表时间：
1997-10-01
影响因子：
2.3
通讯作者：
Heyning, JE
中科院分区：
文献类型：
--
作者：
Heyning, JE
最近对三个线粒体 DNA 区域的一些分析表明，抹香鲸是须鲸的姐妹类群，因此，齿鲸亚目构成了一个并系群。我对现存鲸类所有科的现有形态学数据（包括来自相关化石类群的数据）进行了分类分析，以检验这一假设。这项分析的结果明确支持了包括抹香鲸在内的单系类鲸鱼属。所有支持齿鲸节的共性都是决定性的，与高度相关性状的进化无关，并且无论使用哪种哺乳动物目作为外类群，都提供相同的结果。这些数量众多、解剖学上多样化且明确的特征使这个分支成为哺乳动物中得到最充分支持的高级群体之一。此外，化石证据反驳了抹香鲸/须鲸进化枝。分子和形态数据都产生相同的无根树。分子树的不当扎根似乎产生了这些看似不一致的系统发育。
Some recent analyses of three mitochondrial DNA regions suggest that sperm whales are the sister group to baleen whales and, therefore, the suborder Odontoceti (toothed whales) constitutes a paraphyletic group. I cladistically analyzed the available morphological data, including that from relevant fossil taxa, for all families of extant cetaceans to test this hypothesis. The results of this analysis unambiguously support a monophyletic Odoneoceti including the sperm whales. All synapomorphies that support the Odontoceti node are decisive, not related to the evolution of highly correlated characters, and provide the same result regardless of what order of mammals is used as an outgroup. These numerous, anatomically diverse, and unambiguous characters make this clade one of the best-supported higher-level groupings among mammals. In addition, the fossil evidence refutes a sperm whale/baleen whale clade. Both the molecular and morphological data produce the same unrooted tree. The improper rooting of the molecular tree appears to be producing these seemingly incongruent phylogenies.