Data from: A taxonomic revision of the North American species of Lepraria s.l. that produce divaricatic acid, with notes on the type species of the genus L. incana.

The divaricatic acid-producing populations of Lepraria in North America north of Mexico are revised using traditional morphological characters, chemistry, ecology, biogeography, and ITS1, 5.8S, and ITS2 sequence data. Three taxa are accepted: L. cryophila, L. hodkinsoniana sp. nov., and L. pacifica sp. nov. Both Lepraria crassissima and L. incana are excluded from the study area. Non-cryptic, semi-cryptic, and fully-cryptic species concepts in Lepraria are discussed with a special emphasis on the practical integration of molecular characters into taxonomic frameworks based on non-molecular characters.本研究基于传统形态学特征、化学特征、生态学特征、生物地理学特征以及ITS1、5.8S和ITS2序列数据，对墨西哥以北北美地区产歧枝酸（divaricatic acid）的粒鳞地衣属（Lepraria）类群开展分类学修订。本次研究共确认3个有效分类群：雪生粒鳞地衣（L. cryophila）、霍金森粒鳞地衣（L. hodkinsoniana sp. nov.，新种）以及太平洋粒鳞地衣（L. pacifica sp. nov.，新种）。厚粒鳞地衣（L. crassissima）与灰粒鳞地衣（L. incana）被排除出本次研究的分布区范围。此外，本研究还探讨了粒鳞地衣属中非隐存种、半隐存种及完全隐存种的物种概念，并重点阐述了如何将分子特征与基于非分子特征建立的分类学框架进行实践整合。