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Fragilaria irregularis sp. nov. a new araphid species (Fragilariaceae, Bacillariophyta) from the River Adegoy, Krasnodar Territory, Russia

Fragilaria irregularis sp. nov. a new araphid species (Fragilariaceae, Bacillariophyta) from the River Adegoy, Krasnodar Territory, Russia

Authors :
Dmitry Chudaev
Ingrid Jüttner
Bart Van de Vijver
Source :
Phytotaxa
Publication Year :
2021
Publisher :
Magnolia Press, 2021.

Abstract

During a survey of the diatom flora of the Adegoy River (Krasnodar Territory, Russia), an unknown Fragilaria species (Bacillariophyta) was found that could not be identified using the currently available literature and here we describe it as a new species. The morphology of Fragilaria irregularis sp. nov. was studied using light and scanning electron microscopy and compared to similar species including Fragilaria deformis, F. rinoi, F. septentrionalis and Fragilariforma bicapitata. It differed from these taxa in several characters. Most observed valves showed an irregular striation pattern, a feature not observed in other species. Other important differences include valve outline (linear with parallel margins) and stria density (7–14 in 10 µm, lower compared to all other species). The new taxon has a linear valve outline with parallel to weakly convex margins, subcapitate apices and a very irregular, coarse striation pattern.

Details

ISSN :
11793163 and 11793155
Volume :
508
Database :
OpenAIRE
Journal :
Phytotaxa
Accession number :
edsair.doi.dedup.....457b805b0be7ed9c1655ccfee9d6bb9b
Full Text :
https://doi.org/10.11646/phytotaxa.508.2.11