Morphological transformations can be generated by evolutionary changes in the sequence of developmental events. In this study, we examined the evolutionary dynamics of the developmental sequence on a macroevolutionary scale in teleosts. Using the information from previous reports describing the development of 31 species, we extracted the developmental sequences of 19 landmark events involving the formation of phylogenetically conserved body parts; we then inferred ancestral developmental sequences by two different parsimony‐based methods—event‐pairing and continuous analysis. The phylogenetic comparisons of these sequences revealed event‐dependent heterogeneity in the frequency of sequence changes. Most of the sequence changes occurred as exchanges of temporally neighboring events. These heterochronic changes in developmental sequences accumulated along evolutionary time, but the precise distribution of the changes over the teleostean phylogeny remains unclear due to technical limitations.

中文翻译：

---

在硬骨鱼类进化多样化过程中，发展标志性事件的时间序列上的频繁非随机移位。

形态变化可以通过发育事件序列中的进化变化来产生。在这项研究中，我们检查了硬骨鱼的宏观进化尺度上发育序列的进化动力学。利用先前报道中描述31种物种发展的信息，我们提取了19种标志性事件的发展序列，这些事件涉及系统发育上保守的身体部位的形成。然后，我们通过两种不同的基于简约的方法（事件配对和连续分析）来推断祖先的发育序列。这些序列的系统发育比较揭示了序列变化频率中事件相关的异质性。大多数序列变化发生在时间相邻事件的交换上。