Basidioradulum mayi and B. tasmanicum spp. nov. (Hymenochaetales, Basidiomycota) from both sides of Bass Strait, Australia
Basidioradulum mayi and B. tasmanicum spp. nov. (Hymenochaetales, Basidiomycota) from both sides of Bass Strait, Australia
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Basidioradulum mayi 和 B. tasmanicum spp.
DOI：
10.1038/s41598-019-57061-y
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发表时间：
2020-01-09
影响因子：
4.6
通讯作者：
Zhou, Li-Wei
中科院分区：
文献类型：
--
作者：
Wang, Xue-Wei;Jiang, Ji-Hang;Zhou, Li-Wei
在形态学上，Basidioradulum被认为是Xylodon的异名。在这里，它的独立性内Hymenochaetales确认从系统发育的角度来看。齿舌担子菌属广泛分布于北方半球。两个南半球物种接近B。齿舌新描述为B。mayi和B. tasmanicum，分别来自澳大利亚的维多利亚和塔斯马尼亚。马伊担子霉与B不同。由于缺乏囊状体而具齿舌。此外，B的子实层表面也有明显的凹凸不平。齿舌通常比B的齿舌更强。mayi。Basidioradulum tasmanicum与B不同。齿舌和B. mayi具有头状囊状孢子，担孢子椭圆形到近球形，菌丝被晶体覆盖。虽然形态上不同，巴斯海峡分离出的两个新种有一个几乎相同的ITS区，并不能区分nLSU和ITS为基础的系统发育分析。这种情况提醒我们，简单地将ITS作为条形码区域来建立真菌遗传学可能会低估真菌物种的多样性。
Basidioradulum was morphologically considered to be a synonym of Xylodon. Here, its independence within Hymenochaetales is confirmed from a phylogenetic perspective. Basidioradulum radula, the generic type, is widely distributed in Northern Hemisphere. Two Southern Hemisphere species close to B. radula are newly described as B. mayi and B. tasmanicum, respectively, from Victoria and Tasmania, Australia. Basidioradulum mayi differs from B. radula by lack of cystidia. Moreover, the hymenial surface of B. radula is normally much more strongly hydnoid than that of B. mayi. Basidioradulum tasmanicum is distinct from B. radula and B. mayi by having capitate cystidia, ellipsoid to subglobose basidiospores, and crystal-covered hyphae. Although morphologically distinct, the two new species isolated by Bass Strait have an almost identical ITS region, and could not be differentiated by nLSU- and ITS-based phylogenetic analyses. This case reminds us that basing phylogeny simply on the ITS as a barcode region may underestimate fungal species diversity.