Systematics, taxonomy and biogeography of three new Asian genera of Brassicaceae tribe Arabideae: An ancient distribution circle around the Asian high mountains
Systematics, taxonomy and biogeography of three new Asian genera of Brassicaceae tribe Arabideae: An ancient distribution circle around the Asian high mountains
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DOI：
10.1002/tax.615003
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发表时间：
2012-10-01
期刊：
影响因子：
3.4
通讯作者：
Al-Shehbaz, Ihsan A.
中科院分区：
文献类型：
--
作者：
Koch, Marcus A.;Karl, Robert;Al-Shehbaz, Ihsan A.
基于广泛的分子研究和对形态的严格评估，Arabideae部落最近被分成两个部落，新引入的Stevenieae部落与A rabideae部落的其余成员是姐妹。Stevenieae包括假透气性肠炎(1种)、Macropodittin(2种)和Stevenia(8种)等2个种。Arabideae族包括17属488种，其分类学受Arabis的准系统和多系统划分的影响很大。在这里，我们分离了三个形态相似但系统发育不同的新属，Scapiarabis，Borodiniopsis和Sinoarabis，并提供了目前所划分的Arabideae属和Scapiarabis的四种检索表。文中提出了四个新组合(S.Ariana，S.Karategina，S.opolovii，S.saxicola)，一个是Borodiniopsis(B.alaschanica)，一个是Sinoarabis(S.setosifolia)。Arabis kamelinii和A.kokanika分别被归结为Scapiarabis Ariana和S.saxicola的异名。结果表明，Scapiarabis与非模式属Botschantzevia、Arcyosperma、Parryodes和Borodiniopsis形成一个支系。在生物地理上，整个分支围绕着亚洲高山系统形成一个圆圈，被姐妹分支的不同遗传成员打断和分隔，姐妹分支包括白马珊瑚、伪德拉巴和中国阿拉比斯。整个生物地理场景早于更新世，而这些属来自上新世。
Based on extensive molecular studies and critical evaluation of morphology, tribe Arabideae has recently been split into two tribes with the newly introduced tribe Stevenieae sister to the remaining members of tribe A rabideae. Tribe Stevenieae includes II species belonging to Pseudoturritis (1 sp.), Macropodittin (2 spp.), and Stevenia (8 spp.). Tribe A rabideae includes about 488 species in 17 genera, and its taxonomy is highly affected by the previous para- and polyphyletic circumscription of Arabis. Here we segregate three morphologically similar but phylogenetically distinct new genera, Scapiarabis, Borodiniopsis, and Sinoarabis from Arabis (tribe Arabideae) and provide keys to the genera of Arabideae as currently delimited and to the four species of Scapiarabis. Four new combinations in Scapiarabis (S. ariana, S. karategina, S. popovii, S. saxicola), one in Borodiniopsis (B. alaschanica), and one in Sinoarabis (S. setosifolia) are proposed. Arabis kamelinii and A. kokanika are reduced to synonymy of Scapiarabis ariana and S. saxicola, respectively. It is shown that Scapiarabis forms a clade with the rnonotypic genera Botschantzevia, Arcyosperma, Parryodes, and Borodiniopsis. Biogeographically the whole clade forms a circle around the Asian high mountain system, which is interrupted and separated by genetically distinct members of the sister clade that includes Baimashania, Pseudodraba and Sinoarabis. The whole biogeographic scenario predates the Pleistocene, and the genera are of Pliocene origin.