Nupela major sp. nov., a new diatom species from Maolan Nature Reserve, central-south of China

Abstract

Nupela major sp. nov., a new species of the diatom genus Nupela, is described from Maolan Nature Reserve, Guizhou Province, China. Observations were made using light and scanning electron microscopy documenting the size, shape and ultrastructure of the new species. Valves of the monoraphid frustules are elliptical-lanceolate with more or less cuneate, subtlety protracted ends. The raphe valve has a linear-lanceolate axial area and an irregularly-shaped central area. Striae appear intermittent or disrupted. The rapheless valve has a linear-lanceolate axial area widening in the center to form an asymmetrical central area that can in some specimens reach to the valve margin. The rapheless valve has a contoured valve face, with deep indentations in the axial area. The species is assigned to Nupela by virtue of its external occlusions on the areolae, and compared with similar species in the genus. The new species is found on stones beneath a waterfall and associated with a moss community.

A new species of Achnanthes (Bacillariophyceae) from a freshwater habitat in a karst landform from south‐central China

“…In the sample we studied here, two large species may be found, Nupela major (Yu et al . ) and A. maolanensis (both taxa having cells that are more than 30 μm long, with the largest cells reaching up to 90 μm in length). Most of the other species in this sample are very small, less than 20 μm long, for example Achnanthidium spp., Sellaphora spp., and Navicula spp., among others.…”

“…As a part of our continuing study of the freshwater diatoms of Guizhou Province, China (Kociolek et al 2016a(Kociolek et al , 2016bYou et al 2016You et al , 2017Lowe et al 2017;Yu et al 2017), we encountered a species of Achnanthes for which we can find no previous description. The purpose of the present report is to present light and scanning electron microscope observations of this Achnanthes species from Guizhou, and to offer a formal description of it as a species new to science.…”

“…; Yu et al . ), we encountered a species of Achnanthes for which we can find no previous description. The purpose of the present report is to present light and scanning electron microscope observations of this Achnanthes species from Guizhou, and to offer a formal description of it as a species new to science.…”

Three new freshwater species of the genus Achnanthidium (Bacillariophyta, Achnanthidiaceae) from Taiping Lake, China

“…In the laboratory, diatom samples were cleaned with concentrated nitric acid using the Microwave Accelerated Reaction System (Model MARS, CEM Corporation, Charlotte, USA) (Parr et al 2004), with a pre-programmed digestion scheme (temperature, 180℃) (You et al 2015;Yu et al 2017). Next, samples were alternately centrifuged for 5 min at 3500 rpm (TDZ5-WS, Luyi Corporation, Shanghai, China) and washed six times using distilled water until the pH of the sample was close to neutral.…”

Five new Achnanthidiaceae species (Bacillariophyta) from Jiuzhai Valley, Sichuan Province, Southwestern China

“…Currently, more than 200 Achnanthidium species have been reported in the literature worldwide (Marquardt et al 2017, Yu et al 2019. In China, roughly 60 Achnanthidium species have been reported (Liu et al 2013, Wang & Deng 2017, Yu et al 2017, but only a few have been reported as new species (Yu et al 2018, 2019, Liu et al 2016.…”