Evolution of the army ant syndrome: The origin and long-term evolutionary stasis of a complex of behavioral and reproductive adaptations
Evolution of the army ant syndrome: The origin and long-term evolutionary stasis of a complex of behavioral and reproductive adaptations
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DOI：
10.1073/pnas.1137809100
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发表时间：
2003-05-27
影响因子：
11.1
通讯作者：
Brady, SG
中科院分区：
文献类型：
--
作者：
Brady, SG
行为和生殖特征的军蚁综合症(专职的集体觅食、游牧和高度专业化的蚁后)使这些生物成为热带地区主要的社会猎人，但我们对这些策略是如何或为什么进化的知之甚少。目前被接受的观点认为，军蚁在不同的大陆上进化了多次。我生成了来自三个核基因、一个线粒体基因和形态的数据，以检验这一假设。结果有力地表明，在世界各地发现的军蚁的行为和生殖适应套件是从一个独特的共同祖先继承的，并不像之前认为的那样在新大陆和东半球一致进化。利用化石和分子信息相结合的新的贝叶斯方法来测定谱系的古代，将行军蚂蚁的起源放在白垩纪中期，与冈德瓦南的起源一致。由于已知的军蚁物种中没有任何一种缺乏军蚁综合症的任何组成部分，这个群体代表了这些适应过程中长期进化停滞的特殊情况。
The army ant syndrome of behavioral and reproductive traits (obligate collective foraging, nomadism, and highly specialized queens) has allowed these organisms to become the premiere social hunters of the tropics, yet we know little about how or why these strategies evolved. The currently accepted view holds that army ants evolved multiple times on separate continents. I generated data from three nuclear genes, a mitochondrial gene, and morphology to test this hypothesis. Results strongly indicate that the suite of behavioral and reproductive adaptations found in army ants throughout the world is inherited from a unique common ancestor, and did not evolve convergently in the New World and Old World as previously thought. New Bayesian methodology for dating the antiquity of lineages by using a combination of fossil and molecular information places the origin of army ants in the mid-Cretaceous, consistent with a Gondwanan origin. Because no known army ant species lacks any component of the army ant syndrome, this group represents an extraordinary case of long-term evolutionary stasis in these adaptations.