Caloneis nanyiensis sp. nov. (Bacillariophyta) from Nanyi Lake of Anhui Province, China

By

Fang, Yong
Yu, Pan
You, Qingmin
Kociolek, John Patrick
Cao, Yue
Wang, Quan-Xi
Qian, Zhiping

Type

Article

Date of Publication

2025

Original Publication

PhytoKeys

Volume

255

Pages

113--122

Subjects

Axial area , Caloneis , girdle , raphe , rhombic valve

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers [2010]-

Identifiers

DOI: https://doi.org/10.3897/phytokeys.255.145664

 

Abstract

A new species, Caloneis nanyiensissp. nov., is described from Nanyi Lake, the largest lake in southern Anhui Province, China. Observations were made using a light and scanning electron microscope documenting the size, shape and ultrastructure of the new species. Caloneis nanyiensissp. nov. has rhombic valves with acutely rounded apices. The raphe is narrow and arched. An internal axial plate covers the alveoli, leaving small marginal openings bordered by costa, thickened and raised from the valve face. The striae are slightly radiate to parallel in the central area, becoming radiate towards the apices. By comparing the new species with similar Caloneis species, C. nanyiensissp. nov. was confirmed to be sufficiently different with respect to valve size and striae density to be recognised as new to science. The new species lives in freshwater habitats and epiphytic on Cladophora. The discovery enhances our knowledge of the diversity of freshwater diatoms in China.