精确的物种分类是系统学、生态学和保护生物学等学科的重要基础。传统的形态学分类是分类学的基础，但形态分类往往会丢失物种多样性。整合形态学、新的分子系统学、生态生物地理学等多学科数据和方法对物种进行分类是现代分类学发展的趋势。齿蟾属是我国西南山区特有的两栖动物类群，其物种分类尚存诸多问题、系统发育关系未得到解决。因此，本项目以该属为研究对象，对其进行广泛的种群采样，整合多学科数据和方法对该属物种进行界定与分类厘定，构建新的自然分类系统。以溯祖原理为主导的新的分子系统学方法构建齿蟾属系统发育关系，并进行分子分类；根据形态量度统计分析、定性性状比较和形态特征演化的分析结果进行物种形态分类厘定；通过生态位建模检测不同物种或支系间的生态差异水平，为物种分类提供生态证据。本项研究的开展将丰富中国两栖动物分类学的研究内容，为齿蟾属的生物地理学和保护生物学的研究奠定基础。

Exact species delimitation is fundamental for systematics, ecology and conservation biology. Morphological taxonomy is the base, but it often loses species diversity. Integrating multiple data and new methods of morphological taxonomy, molecular phylogenetics and ecological biogeography become popular on species delimitation. The genus oreolalax is endemic to the mountains of the southewestern China,but species taxonomy within it is still unclear and phylogenetic relationships within it was also unresolved. Therefore, our group will collect all known populations of this genus and study species taxonomy within it. We will use new phylogenetic methods based on coalescent rules to reconstruct the phylogenetic relationships among species of Oreolalax and conduct molecular species delimitation; further, we will conduct morphometric statistical analyses, comparing qualitative morphology among species and reconstruct evolutionary patterns of main morphological characters,and based on these results,we test taxonomy of this genus; finally, using ecological niche modeling we investigate ecological difference among species or lineages and provide ecological evidence for species delimitation. This work will provide new content on species taxonomy and delimitation of Chinese amphibians, and is in favour of researches on biogeography and conservation biology of this genus.