Available ecological information, an extensive distributional range, conflicting osteological data, and a proposed early Miocene origin provide the impetus for the present study which investigates genetic structuring, biogeographic, and phylogenetic relationships within the Aplocheilichthys spilauchen lineage. Through the analysis of the mitochondrial gene COI, species delimitation methods (ABGD, GB, GMYC, bPTP) were applied, recognizing 6–7 OTUs with absolute pairwise genetic distances ranging between 8 and 22%. The onset of diversification is estimated to be within the middle Miocene and both dispersal and vicariance-shaped A. spilauchen diversity and distribution, as suggested by time-calibrated and ancestral range reconstruction (S-DIVA) analyses. We report for the first time, a pattern of diversification within a lineage of brackish water fish that is concordant with the historical distribution of coastal mangroves forests, shaped by a series of historical events that likely affected forest cover since the middle Miocene (e.g. major climate shifts and sea-level fluctuations, onset of the modern Congo River outlet, increased volcanism in the Cameroon Volcanic Line). Supplementary information The online version of this article (doi:10.1007/s10750-020-04497-3) contains supplementary material, which is available to authorized users.

中文翻译：

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跟随红树林：非洲大西洋沿岸带状灯眼 Aplocheilichthys spilauchen (Duméril, 1861) (Cyprinodontiformes: Procatopodidae) 的多样化

现有的生态学信息、广泛的分布范围、相互矛盾的骨学数据以及提出的中新世早期起源为本研究提供了动力，该研究调查了 Aplocheilichthys spilauchen 谱系内的遗传结构、生物地理学和系统发育关系。通过对线粒体基因 COI 的分析，应用了物种划分方法（ABGD、GB、GMYC、bPTP），识别了 6-7 个 OTU，绝对成对遗传距离在 8% 到 22% 之间。正如时间校准和祖先范围重建 (S-DIVA) 分析所表明的那样，多样化的开始估计在中新世中期以及分散和变异形的 A. spilauchen 多样性和分布。我们第一次报道，咸水鱼类谱系中的一种多样化模式，与沿海红树林的历史分布一致，由中新世中期以来可能影响森林覆盖的一系列历史事件（例如主要气候变化和海平面波动，现代刚果河出口的开始，喀麦隆火山线的火山活动增加）。补充信息 本文的在线版本（doi:10.1007/s10750-020-04497-3）包含补充材料，授权用户可以使用。喀麦隆火山线的火山活动增加）。补充信息 本文的在线版本（doi:10.1007/s10750-020-04497-3）包含补充材料，授权用户可以使用。喀麦隆火山线的火山活动增加）。补充信息 本文的在线版本（doi:10.1007/s10750-020-04497-3）包含补充材料，授权用户可以使用。