Ulnaria shun-biseriata sp. nov. (Bacillariophyta) from the Shun River in Hunan Province, China

By

Zheng, Yan
Liu, Bing (Aquatic ecologist)
Rioual, Patrick
Long, Ji-Yan
Zhou, Min

Type

Article

Date of Publication

2024

Original Publication

PhytoKeys

Volume

246

Pages

315--327

Subjects

abnormal valve , biseriate striae , pre-normal valve , Ulnaria , valvocopula

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers [2010]-

Identifiers

DOI: https://doi.org/10.3897/phytokeys.246.130942

 

Abstract

A new species, Ulnaria shun-biseriatasp. nov., was found in the Shun River of Hunan Province, southern China, and its morphology was described based on light and scannning electron microscope obervations. Ulnaria shun-biseriata is characterized by its lanceolate valve outline, apiculate valve apices, slightly undulate valve margins, mostly biseriate striae, variable central area, and closed valvocopula. Many abnormal valves of U. shun-biseriata were observed in the samples investigated and the most frequent morphological abnormalities consisted of a lack of symmetry relative to the apical axis caused by a unilateral expansion in the middle part of the valve.