Ultrastructure of three species of Surirella (Bacillariophyta) from Lake Qinghai, China, with descriptions of two new species

By

Ma, Ya-Lun
Peng, Qiao-Mu
Rioual, Patrick
Liu, Bing (Aquatic ecologist)
Long, Ji-Yan
Yang, Bin

Type

Article

Date of Publication

2025-9-26

Original Publication

PhytoKeys

Volume

263

Pages

175--194

Subjects

brackish water , canal raphe , Diatoms , fibula , marginal depression , portula

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers [2010]-

Identifiers

DOI: https://doi.org/10.3897/phytokeys.263.162632

 

Abstract

Three Surirella species found at the same locality in Lake Qinghai, northwestern China, are studied using light and scanning electron microscope observations. Two species are proposed as new to science and named S. ectoriisp. nov. and S. qinghainensissp. nov. The third species is identified as S. brightwellii W. Smith. Both S. brightwellii and S. qinghainensis have valves with an ovate outline and a broadly rounded headpole and cuneate footpole, whereas S. ectorii has valves with a nearly elliptical outline and an almost isopolar headpole and footpole. Both S. ectorii and S. qinghainensis produce a marginal row of costae on the wall of the raphe canal, whereas S. brightwellii does not possess this feature. This study provides further insights into the diversity of endemic diatom species inhabiting the ancient Lake Qinghai and illustrates the variability of valve ultrastructure in the genus Surirella.