The ecological origins of snakes as revealed by skull evolution.
The ecological origins of snakes as revealed by skull evolution.
复制标题
颅骨进化所揭示的蛇的生态起源。
DOI：
10.1038/s41467-017-02788-3
复制
发表时间：
2018-01-25
影响因子：
16.6
通讯作者：
Di-Poï N
中科院分区：
文献类型：
--
作者：
Da Silva FO;Fabre AC;Savriama Y;Ollonen J;Mahlow K;Herrel A;Müller J;Di-Poï N
蛇的生态起源仍然是进化中最具争议的话题之一，存在三种相互竞争的假说：穴居；水生；陆生。在这里，我们使用一种几何形态测量方法，整合生态、系统发育、古生物学和发育数据，来构建有鳞目动物头骨形状和大小的进化以及发育速率变化的模型。我们的大规模数据显示，尽管蛇冠类的最近共同祖先头骨较小，其形状无疑适应穴居生活，但所有的蛇及其姐妹群都源自一种具有非穴居行为的地表陆生形态，从而将争论引向一个尚未充分探索的进化场景。我们全面的异时性分析进一步表明，蛇后来通过头骨发育的整体加速进化出了新的颅面特化。这些结果凸显了自然选择和发育过程在蛇的起源和多样化过程中相互作用的重要性，首先导致了对新栖息地的入侵，进而引发了后续的生态辐射。
对于祖先蛇的生态状态，已经提出了三种可能性：穴居（挖掘）、水生或陆生。在这里，作者使用一种综合的几何形态测量方法，该方法表明在现存蛇的最近共同祖先中是从陆生进化到穴居的。
The ecological origin of snakes remains amongst the most controversial topics in evolution, with three competing hypotheses: fossorial; marine; or terrestrial. Here we use a geometric morphometric approach integrating ecological, phylogenetic, paleontological, and developmental data for building models of skull shape and size evolution and developmental rate changes in squamates. Our large-scale data reveal that whereas the most recent common ancestor of crown snakes had a small skull with a shape undeniably adapted for fossoriality, all snakes plus their sister group derive from a surface-terrestrial form with non-fossorial behavior, thus redirecting the debate toward an underexplored evolutionary scenario. Our comprehensive heterochrony analyses further indicate that snakes later evolved novel craniofacial specializations through global acceleration of skull development. These results highlight the importance of the interplay between natural selection and developmental processes in snake origin and diversification, leading first to invasion of a new habitat and then to subsequent ecological radiations. Three alternatives have been proposed for the ecological state of the ancestral snake: fossorial (burrowing), aquatic, or terrestrial. Here, the authors use an integrative geometric morphometric approach that suggests evolution from terrestrial to fossorial in the most recent common ancestor of extant snakes.
登录
查看更多内容
影响因子：
2.7
作者：
ALBERCH, P;GOULD, SJ;WAKE, DB
通讯作者：
WAKE, DB
影响因子：
64.8
作者：
Caldwell, MW;Lee, MSY
通讯作者：
Lee, MSY
影响因子：
3.3
作者：
Esquerre, Damien;Sherratt, Emma;Keogh, J. Scott
通讯作者：
Keogh, J. Scott
影响因子：
2.1
作者：
Barros, F. C.;Herrel, A.;Kohlsdorf, T.
通讯作者：
Kohlsdorf, T.
影响因子：
3.4
作者：
Hsiang AY;Field DJ;Webster TH;Behlke AD;Davis MB;Racicot RA;Gauthier JA
通讯作者：
Gauthier JA