Cocconeis crisscrossis sp. nov., a new monoraphid diatom (Bacillariophyta) from southern China

By

Zhou, Huiwen
Yu, Pan
Guo, Luyi
Kociolek, John Patrick
Wang, Quan-Xi
You, Qingmin

Type

Article

Date of Publication

2024

Original Publication

PhytoKeys

Volume

242

Pages

39--50

Subjects

Diatoms , monoraphid , Morphology , new taxa , taxonomy

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers [2010]-

Identifiers

DOI: https://doi.org/10.3897/phytokeys.242.123316

 

Abstract

A novel monoraphid diatom species, Cocconeis crisscrossis You, Yu, Kociolek & Wang, sp. nov. is examined and described from the Qingyi River and Maolan Nature Reserve of southern China. The morphological description is based on light microscopy and scanning electron microscopy observations and the new species is compared with similar taxa in this genus. The characteristics unique to Cocconeis crisscrossissp. nov. include its central area extending irregularly to both sides, it having closed valvocopulae with heavily silicified fimbriate margins and poles of the valvocopulae have ‘sword-shaped’ siliceous extensions. These features differentiate this new species from others in the genus. This new species was found in alkaline waterbodies, including streams, waterfall and ponds. It was usually found as an epiphyte on the stones; however, it was present on other substrates such as mosses.