Cycas chenii (Cycadaceae), a new species from China, and its phylogenetic position

被引：13
|
作者：
Wei, Zhou [1 ,2 ]
Guan, Meng-Meng [1 ,2 ]
Gong, Xun [1 ]
机构：
[1] Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Divers & Biogeog East Asia, Kunming 650201, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
JOURNAL OF SYSTEMATICS AND EVOLUTION | 2015年 / 53卷 / 06期
基金：
中国国家自然科学基金;
关键词：
China; Cycas chenii; new species; phylogenetic position; DNA-SEQUENCES; INFERENCE;
D O I：
10.1111/jse.12153
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
Cycas chenii X. Gong & W. Zhou sp. nov., a new species of Cycas L., is described and illustrated here. The morphological and karyomorphological comparisons are made between C. chenii and the closely related taxa for defining its taxonomical status as a new species. Moreover, the phylogenetic position of C. chenii within 16 Cycas species is determined using DNA sequences of two plastid regions, nuclear ribosomal internal transcribed spacers, and two nuclear regions. Cycas chenii is readily distinguished from the related C. guizhouensis K. M. Lan & R. F. Zou by an acaulescent stem. Phylogenetic evidence indicates that C. chenii is a distinct group related to C. guizhouensis in the Section Stangerioides. The distribution and conservation status of C. chenii are also discussed.
引用
收藏
页码：489 / 498
页数：10
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