A new monster from southwest Oregon forests: Cryptomaster behemoth sp. n. (Opiliones, Laniatores, Travunioidea)

The monotypic genus Cryptomaster Briggs, 1969 was described based on individuals from a single locality in southwestern Oregon. The described species C. leviathan Briggs, 1969 was named for its large body size compared to most travunioid Laniatores. However, as the generic name suggests, Cryptomaster are notoriously difficult to find, and few subsequent collections have been recorded for this genus. Here, we increase sampling of Cryptomaster to 15 localities, extending their known range from the Coast Range northeast to the western Cascade Mountains of southern Oregon. Phylogenetic analyses of mitochondrial and nuclear DNA sequence data reveal deep phylogenetic breaks consistent with independently evolving lineages. We use discovery and validation species delimitation approaches to generate and test species hypotheses, including a coalescent species delimitation method to test multi-species hypotheses. For delimited species, we use light microscopy and SEM to discover diagnostic morphol...

单型属隐盲蛛属（Cryptomaster Briggs, 1969）由Briggs于1969年基于采自俄勒冈州西南部单一采集点的标本描述建立。已描述的该属唯一物种C. leviathan Briggs, 1969（利维坦隐盲蛛）的种名源自其相较于多数travunioid猎盲蛛亚目（Laniatores）类群更大的体型。然而正如该属名所暗示的，隐盲蛛属（Cryptomaster）物种以极难采集而闻名，后续仅记录到极少量该属的采集标本。本研究将隐盲蛛属（Cryptomaster）的采样点拓展至15个，将其已知分布范围从俄勒冈州南部的海岸山脉向东北延伸至喀斯喀特山脉西段。基于线粒体DNA与核DNA序列数据的系统发育分析显示，存在深度的系统发育分化，符合独立演化支系的特征。本研究采用发现与验证型物种界定方法，构建并检验物种假说，其中包含用于检验多物种假说的溯合物种界定方法。针对界定得到的物种，本研究采用光学显微镜与扫描电子显微镜（SEM）开展分类诊断形态特征的探索……