Multi-locus phylogenetic analysis reveals the pattern and tempo of bony fish evolution

Over half of all vertebrates are “fishes”, which exhibit enormous diversity in morphology, physiology, behavior, reproductive biology, and ecology. Investigation of fundamental areas of vertebrate biology depend critically on a robust phylogeny of fishes, yet evolutionary relationships among the major actinopterygian and sarcopterygian lineages have not been conclusively resolved. Although a consensus phylogeny of teleosts has been emerging recently, it has been based on analyses of various subsets of actinopterygian taxa, but not on a full sample of all bony fishes. Here we conducted a comprehensive phylogenetic study on an unprecedented combination of broad taxonomic sampling of actinopterygian and sarcopterygian lineages (with a chondrichthyan outgroup) using a molecular data set of 21 independent loci. These data yielded a resolved phylogenetic hypothesis for extant Osteichthyes, including 1) reciprocally monophyletic Sarcopterygii and Actinopterygii, as currently understood, wi...

脊椎动物中超过半数为“鱼类”，该类群在形态学、生理学、行为学、生殖生物学及生态学领域展现出极为丰富的多样性。脊椎动物生物学基础领域的研究，高度依赖稳健的鱼类系统发育框架，但目前辐鳍鱼纲（Actinopterygii）与肉鳍鱼纲（Sarcopterygii）主要类群间的演化关系尚未得到明确解析。尽管近年来真骨鱼类（Teleostei）的共识系统发育框架逐渐成型，但此类研究多基于辐鳍鱼纲类群的不同子集分析，并未覆盖全部硬骨鱼类的完整样本。本研究以软骨鱼纲（Chondrichthyes）作为外类群，结合辐鳍鱼纲与肉鳍鱼纲类群前所未有的广泛分类采样，利用包含21个独立基因座的分子数据集开展了全面的系统发育研究。本研究为现生硬骨鱼纲（Osteichthyes）构建了明确的系统发育假说，具体包括：1）如当前学界认知的肉鳍鱼纲与辐鳍鱼纲均为相互单系群……