Oricymba (Cymbellales, Bacillariophyceae), a new cymbelloid genus and three new species from the Nepalese Himalaya

被引：62

作者：

Juettner, Ingrid ^{[1
]}

Krammer, Kurt

Van de Vijver, Bart ^{[2
]}

Tuji, Akihiro ^{[3
]}

Simkhada, Bishnu

Gurung, Smriti ^{[4
]}

Sharma, Subodh ^{[4
]}

Sharma, Chhatra ^{[4
]}

Cox, Eileen J. ^{[5
]}

机构：

[1] Natl Museum Wales, Dept Biodivers & Systemat Biol, Cardiff CF10 3NP, S Glam, Wales

[2] Natl Bot Garden Belgium, Dept Bryophyta & Thallophyta, B-1860 Meise, Belgium

[3] Natl Museum Nat & Sci, Dept Bot, Tsukuba, Ibaraki 3050005, Japan

[4] Kathmandu Univ, Dept Environm Sci & Engn, Aquat Ecol Ctr, Kathmandu, Nepal

[5] Nat Hist Museum, Dept Bot, London SW7 5BD, England

来源：

PHYCOLOGIA | 2010年 / 49卷 / 05期

关键词：

Asia; Cymbella japonica; Cymbellales; Diatoms; Nepal; New genus; Oricymba; DIATOM BIOGEOGRAPHY; FRESH-WATER; DIVERSITY; PATTERNS; STREAMS;

D O I：

10.2216/09-77.1

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

A new genus Oricymba is described with its type species based on Cymbella japonica Reichelt. In addition, three new species are described from the Nepalese Himalaya: O. subaequalis, O. latirotundata and O. subovalis. The new genus has slightly dorsiventral or almost symmetrical valves with polar raphe endings deflected to the dorsal side. It can be distinguished from other cymbelloid genera by two morphological characters. There is a ridge along the valve face: mantle junction, and areolae are slit-like and partially occluded by dentate projections. To date Oricymba has been found only in often nutrient-poor, freshwater habitats of the Indian subcontinent, Southeast Asia, Korea and Japan.

引用

页码：407 / 423

页数：17

共 38 条

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