Pinnularia subcatenaborealis sp. nov. (Bacillariophyta) a new chain-forming diatom species from King George Island (Maritime Antarctica)

NATALIA KOCHMAN-KĘDZIORA; EVELINE PINSEEL; MATEUSZ RYBAK; TERESA NOGA; MARIA OLECH; BART VAN DE VIJVER

doi:10.11646/phytotaxa.364.3.5

Issue: Vol. 364 No. 3: 14 August 2018

Type: Article

Published: 2018-08-14

DOI: 10.11646/phytotaxa.364.3.5

Page range: 259–266

Abstract views: 33

PDF downloaded: 1

Pinnularia subcatenaborealis sp. nov. (Bacillariophyta) a new chain-forming diatom species from King George Island (Maritime Antarctica)

NATALIA KOCHMAN-KĘDZIORA⁺⁻
EVELINE PINSEEL⁺⁻
MATEUSZ RYBAK⁺⁻
TERESA NOGA⁺⁻
MARIA OLECH⁺⁻
BART VAN DE VIJVER⁺⁻

University of Rzeszow, Faculty of Biology and Agriculture, Podkarpackie Innovative Research Center of Environment, Zelwerowicza 8B, 35-601 Rzeszów, Poland

Ghent University, Faculty of Science, Department of Biology, Laboratory of Protistology & Aquatic Ecology (PAE), Krijgslaan 281-S8, B-9000 Ghent, Belgium Botanic Garden Meise, Research Department, Nieuwelaan 38, B-1860 Meise, Belgium University of Antwerp, Department of Biology, ECOBE, Universiteitsplein 1, B-2610 Wilrijk, Antwerpen, Belgium

University of Rzeszow, Faculty of Biology and Agriculture, Department of Agroecology, Ćwiklińskiej 1a, 35-601 Rzeszów, Poland

University of Rzeszow, Faculty of Biology and Agriculture, Department of Soil Studies, Environmental, Chemistry and Hydrology, Zelwerowicza 8B, 35-601 Rzeszów, Poland

Jagiellonian University, Department of Polar Research and Documentation, Institute of Botany, Kopernika 27, 31-501 Kraków, Poland

Botanic Garden Meise, Research Department, Nieuwelaan 38, B-1860 Meise, Belgium University of Antwerp, Department of Biology, ECOBE, Universiteitsplein 1, B-2610 Wilrijk, Antwerpen, Belgium

Algae new species Pinnularia colony formation freshwater diatoms

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Abstract

During a survey conducted on the freshwater diatom flora of small shallow pools on the Ecology Glacier forefield (King George Island, Maritime Antarctic Region), an unknown spine-bearing chain-forming Pinnularia species, belonging to the Pinnularia borealis species complex, was found. Although it closely resembles the recently described Pinnularia catenaborealis from James Ross Island and Vega Island (Antarctic Peninsula), a unique set of morphological characteristics revealed in both light and scanning electron microscopy clearly discriminates the specimens of King George Island as a new species. Pinnularia subcatenaborealis Kochman-Kędziora, Pinseel & Van de Vijver sp. nov. can be distinguished from P. catenaborealis by an overall smaller valve size, the presence of irregularly formed silica outgrowths on the mantle and small, irregular plates located near the apices. The new taxon is so far only recorded from a small pool with circumneutral pH and very low conductivity.

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