Umbilicaria phaea var. coccinea: conservation status, variety rank, and secondary chemistry

Originally described from a single collection in northern California, Umbilicaria phaea var. coccinea has since been reported from additional sites in California, Oregon, and Washington. Although relatively rare in all three states, there is currently no conservation status for U. phaea var. coccinea in California. Developing conservation strategies and status ranks requires a sound understanding of distribution, frequency, habitat requirements, and taxonomic placement. Therefore, we evaluated distributions and constructed climate envelope models for both varieties of U. phaea. Umbilicaria phaea var. coccinea appears to be restricted to relatively small habitats within the range of U. phaea var. phaea and is only locally common in portions of the Klamath River watershed. To assess evolutionary relationships between the varieties, we evaluated four molecular loci: ITS2, LSU, Mcm7, and mtSSU. A combined phylogeny using maximum-likelihood and Bayesian inference indicated that U. phaea is m...

该类群最初依据加利福尼亚北部的单份采集记录被描述，红脐衣绯红变种（Umbilicaria phaea var. coccinea）后续在加利福尼亚、俄勒冈州与华盛顿州的多个样点被再度报道。尽管在这三个州内该变种均相对稀有，但目前加利福尼亚州尚未为其划定保护等级。制定保护策略与保护等级评估，需要对其分布范围、发生频率、生境需求以及分类学定位具备充分的认知基础。因此，我们针对石脐衣（Umbilicaria phaea）的两个变种开展了分布调查，并构建了气候包模型。红脐衣绯红变种似乎仅局限于石脐石原变种（Umbilicaria phaea var. phaea）分布范围内的小型生境中，且仅在克拉马斯河流域的部分区域呈现局地常见的分布格局。为评估这两个变种间的演化关系，我们对四个分子位点进行了分析：ITS2、LSU、Mcm7以及mtSSU。基于最大似然法与贝叶斯推断构建的联合系统发育分析表明，石脐衣（Umbilicaria phaea）……