Forest refugia in Western and Central Africa as ‘museums’ of Mesozoic biodiversity
Forest refugia in Western and Central Africa as ‘museums’ of Mesozoic biodiversity
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西非和中非的森林保护区是中生代生物多样性的“博物馆”
DOI：
10.1098/rsbl.2012.0932
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发表时间：
2013
期刊：
影响因子：
3.3
通讯作者：
Gonzalo Giribet
中科院分区：
文献类型：
--
作者：
Jérôme Murienne;Ligia R. Benavides;L. Prendini;G. Hormiga;Gonzalo Giribet
避难所物种形成模型，或“物种泵”，被广泛接受的背景下，热带植物地理学，并一直主张作为一个解释目前的物种分布在热带西部和中部非洲。为了验证这一假设，根据四个核和线粒体DNA标记，推测了一个隐蛛目Ricinulei的进化史。这种古老的生活在落叶层中的节肢动物，是西非和中非以及新热带地区原始森林的特有物种，可能会为非洲的进化模式和克里思提供见解。26个非洲ricinuleid标本从8个国家跨越Ricinulei在非洲大陆的分布，并与新热带区样本加上其他蜘蛛类外类群一起分析。系统发育和分子测年的结果表明，蓖麻的多样化与冈瓦纳大陆的分裂。西非和中非蓖麻属植物的早期多样性在88（±33）Ma左右更符合古老的古地理事件，而不是最近的气候波动。与最近的分子研究不同，这些结果与化石证据一致，表明避难所可能是保存古代多样性的“博物馆”，而不是在非洲气候波动的连续事件中产生多样性的引擎。
The refugial speciation model, or ‘species pump’, is widely accepted in the context of tropical biogeography and has been advocated as an explanation for present species distributions in tropical Western and Central Africa. In order to test this hypothesis, a phylogeny of the cryptic arachnid order Ricinulei, based on four nuclear and mitochondrial DNA markers, was inferred. This ancient clade of litter-dwelling arthropods, endemic to the primary forests of Western and Central Africa and the Neotropics, might provide insights into the mode and tempo of evolution in Africa. Twenty-six African ricinuleid specimens were sampled from eight countries spanning the distribution of Ricinulei on the continent, and analysed together with Neotropical samples plus other arachnid outgroups. The phylogenetic and molecular dating results suggest that Ricinulei diversified in association with the fragmentation of Gondwana. The early diversification of Ricinoides in Western and Central Africa around 88 (±33) Ma fits old palaeogeographical events better than recent climatic fluctuations. Unlike most recent molecular studies, these results agree with fossil evidence, suggesting that refugia may have acted as ‘museums’ conserving ancient diversity rather than as engines generating diversity during successive episodes of climatic fluctuation in Africa.
影响因子：
4.1
作者：
Evans, BJ;Kelley, DB;Cannatella, DC
通讯作者：
Cannatella, DC