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  4. 中国科学院新生代地质与环境重点实验室
Two new species of Oricymba (Bacillariophyta) from China, described with reference to the structure of the apical pore field

文献类型：期刊论文

作者Yuan, Li2; Liu, Bing2; Rioual, Patrick1,3; Yi, Man-Qi2; Zheng, Yan2
刊名PHYTOTAXA
出版日期2023-04-05
卷号591期号:3页码:181-195
ISSN号1179-3155
关键词Fanjing Mountain headwater stream marginal ridge surface ridge Xiao River
DOI10.11646/phytotaxa.591.3.1
英文摘要Epilithic diatoms form an important component of the benthos in freshwater rivers. As part of a study on the epilithic diatoms in rivers from Hunan and Guizhou Provinces, central China, two new Oricymba species, O. sinensis sp. nov. and O. fanjin-gensis sp. nov., were observed using light and scanning electron microscopy. Oricymba sinensis possesses a conspicuous dorsiventrality, which differs from other Oricymba species. Moreover, O. sinensis has very shallow grooves along either side of each marginal ridge and higher areola density than other Oricymba species. Oricymba fanjingensis has a unique combina-tion of characters that includes apiculate apices of the valve, distinct grooves along either side of the marginal ridge, and a valve surface ridge parallel to its adjacent marginal ridge. This surface ridge is observed for the first time in Oricymba. The valve external and internal ultrastructure is clearly established for these two new species. In particular, their apical pore fields possess internal apertures of each pervalvar row of foramina that are covered by an undulate flap-like silica strip, which does not completely occlude the internal apertures. Some species of the genera Cymbella and Delicatophycus have a similar internal structure in the apical pore field. Thus, the ultrastructure of the apical pore fields should be considered an important distinguishing feature for Cymbelloid diatoms and is worth investigating systematically.
WOS关键词XIANJU NATIONAL-PARK ; ZHEJIANG PROVINCE ; DIATOM BACILLARIOPHYCEAE ; SP-NOV. ; GENUS
资助项目Postgraduate Scientific Research Innovation Project of Hunan Province[CX20221125] ; Scientific Research Project of the Education Department of Hunan Province[22A0376]
WOS研究方向Plant Sciences
语种英语
出版者MAGNOLIA PRESS
WOS记录号WOS:000975068200001
资助机构Postgraduate Scientific Research Innovation Project of Hunan Province ; Postgraduate Scientific Research Innovation Project of Hunan Province ; Scientific Research Project of the Education Department of Hunan Province ; Scientific Research Project of the Education Department of Hunan Province ; Postgraduate Scientific Research Innovation Project of Hunan Province ; Postgraduate Scientific Research Innovation Project of Hunan Province ; Scientific Research Project of the Education Department of Hunan Province ; Scientific Research Project of the Education Department of Hunan Province ; Postgraduate Scientific Research Innovation Project of Hunan Province ; Postgraduate Scientific Research Innovation Project of Hunan Province ; Scientific Research Project of the Education Department of Hunan Province ; Scientific Research Project of the Education Department of Hunan Province ; Postgraduate Scientific Research Innovation Project of Hunan Province ; Postgraduate Scientific Research Innovation Project of Hunan Province ; Scientific Research Project of the Education Department of Hunan Province ; Scientific Research Project of the Education Department of Hunan Province
源URL[http://ir.iggcas.ac.cn/handle/132A11/110893]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Liu, Bing
作者单位1.CAS Ctr Excellence Life & Paleoenvironm, Beijing 100044, Peoples R China
2.Jishou Univ, Coll Biol & Environm Sci, Jishou 416000, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, POB 9825, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Yuan, Li,Liu, Bing,Rioual, Patrick,et al. Two new species of Oricymba (Bacillariophyta) from China, described with reference to the structure of the apical pore field[J]. PHYTOTAXA,2023,591(3):181-195.
APA Yuan, Li,Liu, Bing,Rioual, Patrick,Yi, Man-Qi,&Zheng, Yan.(2023).Two new species of Oricymba (Bacillariophyta) from China, described with reference to the structure of the apical pore field.PHYTOTAXA,591(3),181-195.
MLA Yuan, Li,et al."Two new species of Oricymba (Bacillariophyta) from China, described with reference to the structure of the apical pore field".PHYTOTAXA 591.3(2023):181-195.

入库方式： OAI收割

来源：地质与地球物理研究所

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