Reese Naesborg Rikke, Ekman Stefan, Tibell Leif
Systematic Botany, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18D, SE-752 36 Uppsala, Sweden.
Mycol Res. 2007 May;111(Pt 5):581-91. doi: 10.1016/j.mycres.2007.03.001. Epub 2007 Mar 12.
The molecular phylogeny of the lichen genus Lecania was investigated using nucleotide sequences from the mt-SSU rRNA, the ITS region of the nu-rDNA, and the RNA polymerase II second largest subunit. Forty-six species representing Lecania and other genera likely to influence the phylogeny were included in the study. Phylogenetic reconstructions were carried out using Bayesian inference, ML, and MP approaches. Lecania, as traditionally circumscribed, is not a monophyletic genus. However, a monophyletic group containing a large number of Lecania species, including the type species L. fuscella, was discovered in the analysis, and recognition of Lecania sensu stricto is suggested. L. baeomma, L. glauca, L. gerlachei, L. brialmontii, L. racovitzae, L. hyalina (alias Biatora globulosa), L. chlorotiza, L. naegelii, and L. furfuracea do not belong in Lecania s. str., although the latter two are closely related to Lecania s. str. Representatives of the genus Bilimbia form a well-supported group, as does the 'Thamnolecania' group containing the Antarctic 'Lecania' species, L. gerlachei, L. brialmontii, and L. racovitzae. An alternative to recognizing these two genera would be a wider circumscription of Bilimbia to include the 'Thamnolecania' group as well as affiliated taxa.
利用线粒体小亚基核糖体RNA（mt-SSU rRNA）、核核糖体DNA（nu-rDNA）的ITS区域以及RNA聚合酶II第二大亚基的核苷酸序列，对地衣类 Lecania 属的分子系统发育进行了研究。该研究纳入了代表 Lecania 以及其他可能影响系统发育的属的46个物种。使用贝叶斯推断、最大似然法（ML）和最大简约法（MP）进行系统发育重建。传统界定的 Lecania 属并非单系类群。然而，在分析中发现了一个包含大量 Lecania 物种的单系类群，其中包括模式种 L. fuscella，并建议认可狭义的 Lecania 属。L. baeomma、L. glauca、L. gerlachei、L. brialmontii、L. racovitzae、L. hyalina（别名 Biatora globulosa）、L. chlorotiza、L. naegelii 和 L. furfuracea 不属于狭义的 Lecania 属，尽管后两者与狭义的 Lecania 属关系密切。Bilimbia 属的代表形成了一个得到充分支持的类群，包含南极“Lecania”物种、L. gerlachei、L. brialmontii 和 L. racovitzae 的“Thamnolecania”类群也是如此。认可这两个属的另一种选择是对 Bilimbia 进行更宽泛的界定，将“Thamnolecania”类群以及相关分类单元包括在内。
