Reassessment of the generic limits for Hydnellum and Sarcodon (Thelephorales, Basidiomycota)
Reassessment of the generic limits for Hydnellum and Sarcodon (Thelephorales, Basidiomycota)
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DOI：
10.3897/mycokeys.54.35386
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发表时间：
2019-06-10
期刊：
影响因子：
3.3
通讯作者：
Larsson, Ellen
中科院分区：
文献类型：
--
作者：
Larsson, Karl-Henrik;Svantesson, Sten;Larsson, Ellen
从核LSU和ITS区的DNA序列被用于Thelephorales的系统发育分析，重点是具柄的Hydnellum和Sarcodon属。分析表明，Hydnellum和Sarcodon是不同的属，但目前的划分，基于担子组织，使Sarcodon与Hydnellum并系。为了使属成为单系，将几个种从肉齿菌属移到了Hydnellum属，并产生了以下新组合：Hydnellum amygdaliolens、H. fennicum，H. fuligenopsis violaceum，H. fuscoindicum，H. glaucopus、灰蝶H. joeides，H. lepidum，H. lundellii，H. marticulum，H. scabrosum，H. underwoodii和H. versipelle。在大多数情况下，担子孢子的大小似乎可以区分属。Hydnellum物种的担孢子长度范围为4.45-6.95 μ m，而Sarcodon的相应范围为7.4-9 μ m。S. quercinofibulatus偏离这种模式，平均孢子长度约为6 μ m。新热带区的肉齿菌属物种代表了一个独立的进化谱系。
DNA sequences from the nuclear LSU and ITS regions were used for phylogenetic analyses of Thelephorales with a focus on the stipitate hydnoid genera Hydnellum and Sarcodon. Analyses showed that Hydnellum and Sarcodon are distinct genera but that the current division, based on basidioma texture, makes Sarcodon paraphyletic with respect to Hydnellum. In order to make genera monophyletic several species are moved from Sarcodon to Hydnellum and the following new combinations are made: Hydnellum amygdaliolens, H. fennicum, H. fuligineoviolaceum, H. fuscoindicum, H. glaucopus, H. joeides, H. lepidum, H. lundellii, H. martioflavum, H. scabrosum, H. underwoodii, and H. versipelle. Basidiospore size seems to separate the genera in most cases. Hydnellum species have basidiospore lengths in the range 4.45-6.95 mu m while the corresponding range for Sarcodon is 7.4-9 mu m. S. quercinofibulatus deviates from this pattern with an average spore length around 6 mu m. Neotropical Sarcodon species represent a separate evolutionary lineage.