Early fossils illuminate character evolution and interrelationships of Lampridiformes (Teleostei, Acanthomorpha)
Early fossils illuminate character evolution and interrelationships of Lampridiformes (Teleostei, Acanthomorpha)
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早期化石阐明了灯形目（Teleostei、棘形目）的特征进化和相互关系
DOI：
10.1111/zoj.12166
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发表时间：
2014
影响因子：
2.8
通讯作者：
O. Otero
中科院分区：
文献类型：
--
作者：
Donald Davesne;M. Friedman;V. Barriel;G. Lecointre;P. Janvier;C. Gallut;O. Otero
Lampridiformes是远洋海洋棘形硬骨鱼的一个特殊分支。它的系统发育位置仍然不明确，并根据用于推断相互关系的数据类型（形态或分子）而变化。由于lampridiform的极端形态特化可能已经覆盖了该群体的祖先特征，从而影响了它们之间的关系，因此，将表现出整个群体原始特征状态组合的化石纳入研究，对于确定其系统发育地位至关重要。因此，我们收集了现存的（10个分类群）和化石的（14个分类群）棘形动物的骨学数据，包括晚白垩世早期与现存的Lampridiformes有密切关系的分类群：†Aipichthyoidea，†Pharmacichthyidae和†Pycnosteroididae。我们发现这三个类群加上Lampridiformes形成了一个分支，我们称之为Lampridomorpha。在这一假说下，†Aipichthyoidea是附身的。在分析中包含化石改变了拓扑结构，突出了它们在形态特征的系统发育研究中的关键重要性。当包括化石时，Lampridomorpha是Euacanthomorpha（所有其他现存的acanthomorpha）的姐妹，与大多数先前的解剖学研究一致，但与大多数分子结果相冲突。Lampridomorpha作为一个整体是最早的棘形动物群的主要组成部分，特别是在Cenomanian。©2014伦敦林奈学会
Lampridiformes is a peculiar clade of pelagic marine acanthomorph (spiny-rayed) teleosts. Its phylogenetic position remains ambiguous, and varies depending on the type of data (morphological or molecular) used to infer interrelationships. Because the extreme morphological specializations of lampridiforms may have overwritten the ancestral features of the group with a bearing on its relationships, the inclusion of fossils that exhibit primitive character state combinations for the group as a whole is vital in establishing its phylogenetic position. Therefore, we present an osteological data set of extant (ten taxa) and fossil (14 taxa) acanthomorphs, including early Late Cretaceous taxa for which a close relationship with extant Lampridiformes has been suggested: †Aipichthyoidea, †Pharmacichthyidae, and †Pycnosteroididae. We find that all three taxa plus Lampridiformes form a clade that we call Lampridomorpha. Under this hypothesis, †Aipichthyoidea is paraphyletic. The inclusion of fossils in the analysis changes the topology, highlighting their critical importance in phylogenetic studies of morphological characters. When fossils are included, Lampridomorpha is sister to Euacanthomorpha (all other extant acanthomorphs), concurring with most previous anatomical studies, but conflicting with most molecular results. Lampridomorpha as a whole was a major component of the earliest acanthomorph faunas, notably in the Cenomanian. © 2014 The Linnean Society of London