Evolutionary processes in ant-plant mutualisms are mediated by intrinsic features of the association and by change through time in abiotic components of the system (e.g. geography and climate). Incorporating both biotic and abiotic components and the phylogenies of the taxa involved is central to understanding their respective roles in mutualism evolution. We used a comparative phylogeographic approach to assess the effects of the Andean uplift on the mutualism between Azteca ants and an ant plant, Tococa guianensis, and to ask whether plant and ant diversification were promoted by geography or by the association. We used a combination of nuclear and organellar sequence data to resolve relationships between populations of ants and plants at sites spanning the northern Andes Cordillera in Colombia. To test for phylogenetic and chronological congruence between taxa and major uplift events, we used fossil calibrations and estimated the timing of diversification. We found phylogeographic structure in both Azteca and T. guianensis that coincides spatially and temporally with peaks of activity during the Andean uplift. However, lineage divergence occurs earlier in Azteca than in T. guianensis. We suggest that the Andean uplift had a greater impact on lineage diversification than did the mutualism.

蚂蚁-植物共生的进化过程是由关联的内在特征和系统的非生物组成部分（例如地理和气候）随时间的变化介导的。结合生物和非生物成分以及所涉及的分类群的系统发育对于理解它们在共生进化中的各自作用至关重要。我们使用比较系统地理学方法来评估安第斯隆起对阿兹台克蚂蚁和蚂蚁植物Tococa guianensis之间的共生关系的影响，并询问植物和蚂蚁的多样化是由地理还是由协会推动。我们使用核和细胞器序列数据的组合来解决跨越哥伦比亚安第斯山脉北部的地点的蚂蚁和植物种群之间的关系。为了测试分类群和主要抬升事件之间的系统发育和时间序列一致性，我们使用了化石校准并估计了多样化的时间。我们发现Azteca和T. guianensis 的系统地理学结构在空间和时间上与安第斯隆起期间的活动峰值一致。然而，Azteca比T. guianensis更早发生谱系分化. 我们认为安第斯隆起对谱系多样化的影响大于共生。