title: Umbelopsis longicollis comb. nov. and the synonymy of U. roseonana and U. versiformis with U. nana.
abstract: Based on maximum growth temperatures, morphological characteristics and multilocus phylogenies (partial 18S and 28S, internal transcribed spacer regions of nuc rDNA and a fragment of an actin gene), Umbelopsis roseonana and U. versiformis are treated as heterotypic synonyms of U. nana, while the phylogenetically closely related U. dimorpha is retained as a separate species. Mortierella longicollis is reclassified as a new combination, U. longicollis. In addition, lectotypes and epitypes for the basionyms of U. longicollis and U. nana are designated here.
authors.affiliation: State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China, and University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
authors.forename: Ya-Ning
authors.initials: YN
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China liuxiaoyong@im.ac.cn zhengry@im.ac.cn.
authors.forename: Xiao-Yong
authors.initials: XY
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China liuxiaoyong@im.ac.cn zhengry@im.ac.cn.
authors.forename: Ru-Yong
authors.initials: RY
authors.lastname: Zheng
mesh_terms: D001483:Base Sequence; D004271:DNA, Fungal / Q000235:genetics; D009090:Mucorales / Q000145:classification* / Q000235:genetics*; D010802:Phylogeny; D016415:Sequence Alignment; D013045:Species Specificity
chemical_list: D004271:DNA, Fungal
keywords: Mucoromycotina; molecular phylogeny; morphology; taxonomy; typification