Testing species boundaries in the Antrodiaetus unicolor complex (Araneae: Mygalomorphae: Antrodiaetidae):: "Paraphyly" and cryptic diversity
Testing species boundaries in the Antrodiaetus unicolor complex (Araneae: Mygalomorphae: Antrodiaetidae):: "Paraphyly" and cryptic diversity
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DOI：
10.1016/j.ympev.2005.01.021
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发表时间：
2005-08-01
影响因子：
4.1
通讯作者：
Bond, JE
中科院分区：
文献类型：
--
作者：
Hendrixson, BE;Bond, JE
无法正确识别物种对几乎所有生物学领域都具有深远的影响，但很少有研究调查描绘物种边界的方法。此外，一旦假设了这些边界，就很少考虑如何进一步评估这些结构。我们采用分子系统发育方法，使用核 28S rRNA 和线粒体细胞色素 c 氧化酶亚基 I 基因来测试 Antrodiaetus 单色蜘蛛物种复合体中物种边界的一般功效。我们的分析提供了证据表明 An. unicolor 相对于 An 而言是“并系”。微单色，表明用于划分物种边界的形态标准低估了这组蜘蛛的实际物种水平多样性。这些分析还表明，来自地理上接近的种群的个体有时表现出相当大的分子差异，强烈表明An。单色是一种神秘的物种复合体。最后，这种分子方法提供了系统发育框架，这是根据以前的研究结果解释在这些蜘蛛中观察到的大量形态变异所必需的。我们使用多个基因的方法似乎是一种严格检查物种边界的严格方法，最初基于蜘蛛分类学的传统形态学方法。 (c) 2005 Elsevier Inc. 保留所有权利。
The inability to correctly identify species has far reaching implications in nearly all areas of biology, yet few studies investigate methods for delineating species boundaries. Moreover, once these boundaries have been hypothesized, little thought has been given to how these constructs can be further evaluated. We employ a molecular phylogenetic approach using nuclear 28S rRNA and mitochondrial cytochrome c oxidase subunit I genes to test the general efficacy of species boundaries in the Antrodiaetus unicolor spider species complex. Our analyses provide evidence that An. unicolor is "paraphyletic" with respect to An. microunicolor, indicating that morphological criteria used to delineate species boundaries undersplits actual species-level diversity in this group of spiders. These analyses also demonstrate that individuals from geographically proximate populations sometimes exhibit considerable molecular divergence, strongly suggesting that An. unicolor is a cryptic species complex. Finally, this molecular approach has provided the phylogenetic framework that is necessary to begin interpreting the vast amount of morphological variation observed in these spiders based upon findings from previous studies. Our approach using multiple genes appears to be a rigorous method to critically examine species boundaries originally based on traditional morphological approaches to spider taxonomy. (c) 2005 Elsevier Inc. All rights reserved.