Mode of miniaturisation influences body shape evolution in New World anchovies (Engraulidae)
Mode of miniaturisation influences body shape evolution in New World anchovies (Engraulidae)
复制标题
DOI：
10.1111/jfb.14205
复制
发表时间：
2019-12-02
影响因子：
2
通讯作者：
Watrous, Helen
中科院分区：
文献类型：
--
作者：
Bloom, Devin D.;Kolmann, Matthew;Watrous, Helen
通过整合时间校准的系统发育、几何形态计量学和系统发育比较方法，我们探索了新大陆凤尾鱼小型化的宏观进化动力学。我们发现，步态物种Amazonsprattus scintilla占据了一个新的形状空间区域，而矮小物种Anchoviella manamensis的整体形状与其他凤尾鱼一致。我们发现，小型化没有增加整体分支的大小或形状差异，超出了布朗运动的预期，也没有在分支之间的大小或形状演化速率上的差异。总体而言，我们的研究表明，虽然小型化模式影响形状进化，但小型化进化产生的表型新颖性似乎并没有改变宏观进化动力学。
We explored the macroevolutionary dynamics of miniaturisation in New World anchovies by integrating a time-calibrated phylogeny, geometric morphometrics and phylogenetic comparative methods. We found that the paedomorphic species Amazonsprattus scintilla occupies a novel region of shape space, while the dwarf species Anchoviella manamensis has an overall shape consistent with other anchovies. We found that miniaturisation did not increase overall clade disparity in size or shape beyond the expectations of Brownian motion, nor were there differences in rates of size or shape evolution among clades. Overall, our study shows that while the mode of miniaturisation influences shape evolution, the phenotypic novelty produced by the evolution of miniaturisation did not seem to alter macroevolutionary dynamics.