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Type: Article
Published: 2015-05-19
Page range: 135-146
Abstract views: 12
PDF downloaded: 1

Three new species of Navicula (Bacillariophyta) from lakes in Yunnan Plateau (China)

tate Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China
Am Stegskreuz 3b, D–65719 Hofheim, Germany
State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China
St. Croix Watershed Research Station, Science Museum of Minnesota, 16910-152nd St N, Marine on St. Croix, MN 55047 USA
China diatom new species Navicula ancient lakes Algae

Abstract

Three new freshwater diatoms are described from China’s Yunnan Plateau region in sediments from Lakes Fuxian, Erhai, and Lugu. Navicula craticuloides, nov. sp., N. gongii, nov. sp. and N. yunnanensis, nov. sp. were identified from light and scanning electron micrographs. The main features of N. craticuloides are its valve outline with rounded ends, a narrow-lateral raphe, hooked terminal fissures, a linear axial area, a rectangular central area, and wavy striae towards the margins. The main features of N. gongii are narrowly lanceolate valves with long-protracted ends, a lateral raphe, a slightly curved axial area, and a rhombic or transversely expanded central area. The main features of N. yunnanensis are lanceolate valves with triundulate margins and cuneate ends and a lateral raphe. The new species have so far been found mainly in surficial sediment.