Westberg Martin, Arup Ulf, Kärnefelt Ingvar
Department of the Biological Museums, Lund University, Botanical Museum, Ostra Vallgatan 18, SE-223 61 Lund, Sweden.
Mycol Res. 2007 Nov;111(Pt 11):1277-84. doi: 10.1016/j.mycres.2007.08.007. Epub 2007 Aug 19.
The phylogeny of the lichen family Candelariaceae was investigated using nucleotide sequences from the ITS region of the nu-rDNA. Twenty-three species of Candelariella, six species of Candelaria, two species of Candelina and two species of Placomaronea were included in the study. Acarospora cervina and Pleopsidium chlorophanum were used as outgroup species. The phylogenetic analyses were performed using MP and Bayesian MCMC inference. The resulting trees were poorly resolved and strong support was only found for terminal clades. However, the results indicate that polyspored asci have evolved a limited number of times within the family and appear within four clades. One of these clades comprises the core group of Candelariella, including the type species C. vitellina. Placomaronea and Candelina both form strongly supported monophyletic clades, but neither genera are distinctly morphologically separated from Candelariella, and their positions in the tree are uncertain. The genus Candelaria is probably polyphyletic and should possibly be restricted to comprise only polyspored species with a lower cortex.
利用核核糖体DNA ITS区的核苷酸序列对蜡盘衣科的系统发育进行了研究。本研究包括23种小蜡盘衣属、6种蜡盘衣属、2种蜡烛衣属和2种平盘衣属的物种。将鹿角粉盘衣和绿盘藓用作外类群物种。采用最大简约法（MP）和贝叶斯马尔可夫链蒙特卡洛（MCMC）推断进行系统发育分析。所得的系统树分辨率较低，仅在末端分支中发现了有力支持。然而，结果表明多孢孢子囊在该科内仅进化了有限的次数，且出现在四个分支中。其中一个分支包含小蜡盘衣属的核心类群，包括模式种蛋黄小蜡盘衣。平盘衣属和蜡烛衣属均形成了得到有力支持的单系分支，但这两个属在形态上均未与小蜡盘衣属明显区分开，且它们在系统树中的位置尚不确定。蜡盘衣属可能是多系的，或许应限定仅包含具有下皮层的多孢孢子囊物种。
