Two new freshwater species of Surirella (Bacillariophyta) from the Wuling Mountains, China

By

Long, Ji-Yan
Kociolek, John Patrick
Williams, David
Liu, Bing (Aquatic ecologist)
Mo, Wen-hui
Chen, Jin-Hua

Type

Article

Date of Publication

2022

Original Publication

PhytoKeys

Volume

201

Pages

35--49

Subjects

Helictoglossa-like process , new species , Surirella , twisted frustule , ultrastructure

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers [2010]-

Identifiers

DOI: https://doi.org/10.3897/phytokeys.201.79626

 

Abstract

Two sympatric Surirella species found at the same specific locality in the Wuling Mountains of China are documented with light and scanning electron microscope. Both species are new to science and named S. wufluminensissp. nov. and S. suiningensissp. nov.Surirella wufluminensis has large frustules that are either clockwise or counterclockwise twisted when viewed with the light microscope, and possesses distinctive fibulae, mound-like outgrowths on the valve surface throughout, raised longitudinal ridges on both sides of the raphe, and two helictoglossa-like processes at one apex internally. Surirella suiningensis has narrowly ovate valve outline, distinctive fibulae, troughs alternating with crests from pole to pole, and two helictoglossa-like processes at one apex internally. These two species do not produce costae on the valve surface in contrast to many species in Surirella. This study provides a further two examples of the wide range of morphological diversity in the genus Surirella.