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.

本研究依托传统形态学性状、化学特征、生态学、生物地理学及ITS1、5.8S与ITS2序列数据，对墨西哥以北北美地区产歧缝酸的鳞叶衣属（Lepraria）居群开展分类修订。本次研究共确认3个分类群：嗜冷鳞叶衣（L. cryophila）、霍氏鳞叶衣（L. hodkinsoniana sp. nov.）以及太平洋鳞叶衣（L. pacifica sp. nov.）。粗厚鳞叶衣（Lepraria crassissima）与灰鳞叶衣（L. incana）未被纳入本研究的覆盖区域。本文还探讨了鳞叶衣属内非隐存种、半隐存种及完全隐存种的物种概念，并着重探讨如何将分子性状切实整合至基于非分子性状构建的分类框架中。