Clarification of the taxonomic confusion between Ilex formosana and I. tetramera (Aquifoliaceae), with the description of a new species I. shukunii

Clarification of the taxonomic confusion between Ilex formosana and I. tetramera (Aquifoliaceae), with the description of a new species I. shukunii
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澄清台湾冬青 (Ilex formosana) 和 I. tetramera (Aquifoliaceae) 之间的分类学混淆,并描述一个新种 I. shukunii

DOI:
10.11646/phytotaxa.382.2.3
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发表时间:
2018-12
期刊:
影响因子:
1.1
通讯作者:
Hua Peng
Hua Peng
中科院分区:
生物学4区
文献类型:
--
作者:
Yi Yang;Li Chen;Hua Peng

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台湾冬青和台湾冬青均产于中国的亚热带森林中,在形态和分布上容易混淆。为了揭示它们的同源性,本研究利用两个核DNA基因座(ITS和ETS)对这两个种的多个种质及其可能的近缘进行了系统发育分析。我们的研究结果表明,台湾盾叶蜂(来源于模式地)与松材线虫(I.matanoana)和梅尔滕西亚种(I.mertensii)关系最近,而四聚体(I.Tetmera)(来源于模式地)与核心蜂(I.nuculicava)是姊妹种,而其余的标本则与灰霉菌(I.cinerea)形成了一个支序较强的姐妹种,代表了一个新种,命名为I.shukunii。尽管在形态上是同质的,但台湾金龟子、台湾金龟子和四分生金龟子在分布上的差异也支持我们的系统发育结果。由于受到台湾海峡的隔绝,重新定义的台湾一号仅限于台湾岛。在中国-喜马拉雅和中国-日本植物区系的主要地理分界线田中-开永线的隔开,四分体分布于云南东南部至中国大陆的东南部,而重新定义的四分体分布于云南西南部。
Ilex formosana and I. tetramera, both occurring in subtropical forests of China, are easily confused in morphology and distribution. To unravel their identities, phylogenetic analyses of multiple accessions of the two species and their possible relatives using two nuclear DNA loci (ITS and ETS) are conducted in present study. Our results show that I. formosana (sampled from type locality) is closest to I. matanoana and I. mertensii, and I. tetramera (sampled from type locality) is sister to I. nuculicava, while the remaining samples, which were originally identified as I. formosana and I. tetramera, form a strongly supported clade sister to I. cinerea, representing a cryptic new species, which is named here as I. shukunii. Despite the homogeneity in morphology, the divergence in the distribution of I. formosana, I. shukunii, and I. tetramera also supports our phylogenetic results. Insulated by the Taiwan Strait, the re-defined I. formosana is restricted to Taiwan Island. Separated by the Tanaka-Kaiyong Line, a major phytogeographic boundary of Sino-Himalayan and Sino-Japanese Floras, I. shukunii occurs from southeast Yunnan to southeast mainland of China, whereas the re-defined I. tetramera is endemic to southwest Yunnan.
Ilex Dabieshanensis(Aquifoliaceae)杂种起源的分子证据。
DOI: 10.1371/journal.pone.0147825
发表时间: 2016
期刊: PloS one
影响因子: 3.7
作者:
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影响因子: 4.1
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影响因子: 1.9
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