Prolonged morphological expansion of spiny-rayed fishes following the end-Cretaceous
Prolonged morphological expansion of spiny-rayed fishes following the end-Cretaceous
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DOI：
10.1038/s41559-022-01801-3
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发表时间：
2022-07-14
影响因子：
16.8
通讯作者：
Near, Thomas J.
中科院分区：
文献类型：
--
作者：
Ghezelayagh, Ava;Harrington, Richard C.;Near, Thomas J.
作者构建了一个时间校准的跨越>90%的棘鳍鱼的发育，以探索棘形内的体型差异模式。他们发现，新生代的谱系有稳定积累的趋势，随着古近纪事件之后形态差异的增加，促进了不同形态类型的辐射，这些形态类型是今天棘形动物广泛生态成功的特征。棘形鱼（棘形目）主宰着现代海洋栖息地，占所有现存脊椎动物物种的四分之一以上。以前的时间校准的化石记录的模式和模式解释了这种优势，相关的起源主要的棘形谱系与灭绝的古近纪大规模灭绝。在这里，我们推断一个时间校准的adhergeny使用ultraconserved元素，样本91.4%的所有acanthomorph家庭和调查模式的体型差异。我们的研究结果表明，棘形谱系稳步积累整个新生代，并经历了显着的扩张后，白垩纪末数百万年的分支形态差异。这些acanthomorph谱系辐射到不同的区域内的形态空间的特征标志性的谱系，包括快速游泳的远洋捕食者，横向压缩的珊瑚鱼，底栖比目鱼，海马和河豚多样化。棘鳍鱼的进化成功是多个物种丰富和表型不同的谱系在广泛的生态条件下独立地在地球仪上多样化的结果。
The authors construct a time-calibrated phylogeny spanning >90% of spiny-rayed fishes to explore patterns of body shape disparity within acanthomorphs. They find a trend of steady accumulation of lineages from the Cenozoic, with an increase in morphological disparity following the Cretaceous-Palaeogene event, facilitating the radiation of diverse morphotypes that characterize acanthomorphs' widespread ecological success today.Spiny-rayed fishes (Acanthomorpha) dominate modern marine habitats and account for more than a quarter of all living vertebrate species. Previous time-calibrated phylogenies and patterns from the fossil record explain this dominance by correlating the origin of major acanthomorph lineages with the Cretaceous-Palaeogene mass extinction. Here we infer a time-calibrated phylogeny using ultraconserved elements that samples 91.4% of all acanthomorph families and investigate patterns of body shape disparity. Our results show that acanthomorph lineages steadily accumulated throughout the Cenozoic and underwent a significant expansion of among-clade morphological disparity several million years after the end-Cretaceous. These acanthomorph lineages radiated into and diversified within distinct regions of morphospace that characterize iconic lineages, including fast-swimming open-ocean predators, laterally compressed reef fishes, bottom-dwelling flatfishes, seahorses and pufferfishes. The evolutionary success of spiny-rayed fishes is the culmination of multiple species-rich and phenotypically disparate lineages independently diversifying across the globe under a wide range of ecological conditions.