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Issue: Vol. 328 No. 2: 17 November 2017
Type: Article
Published: 2017-11-17
DOI: 10.11646/phytotaxa.328.2.5
Page range: 149–158
Abstract views: 17
PDF downloaded: 1

Aulacoseira glubokoyensis sp. nov. (Bacillariophyceae), a new centric diatom from the Maritime Antarctic region

Universidade Federal Fluminense, UFF, Post-Graduation Program on Environmental Geochemestry, Chemical Institute, Campus Valonguinho, Niterói, RJ, Brazil.
Universidade do Estado do Rio de Janeiro, UERJ, Departamento de Oceanografia Biológica DOB, Faculdade de Oceanografia, R. São Francisco Xavier, 524, Maracanã, Rio de Janeiro, RJ, Brazil
Universidade do Estado do Rio de Janeiro, UERJ, Departamento Instituto de Biologia Roberto Alcantara Gomes- IBRAG, R. São Francisco Xavier, 524, Maracanã, Rio de Janeiro, RJ, Brazil
Universidade Federal do Espírito Santo, UFES, Departamento de Ciências Fisiológicas, Centro de Ciências da Saúde-CCS, Avenida Marechal Rocha Campos, 1468, Maruipe, Vitória, ES, Brazil
Botanic Garden Meise, Research Department, Domein van Bouchout, B-1860 Meise, Belgium University of Antwerp, Department of Biology, ECOBE, Universiteitsplein 1, B-2610 Wilrijk, Belgium
Maritime Antarctic Region morphology sediment core ultrastructure Algae

Abstract

A new centric diatom, Aulacoseira glubokoyensis sp. nov., is described from the Maritime Antarctic region. The morphology of the species is illustrated using detailed light and scanning electron microscopy observations. Its main discriminating features include the presence of typical irregularly shaped dendritic spines, at least two rimoportulae, marginal striae on the discus and a very large Ringleiste. The new species is compared to similar species worldwide. Aulacoseira glubokoyensis has only been observed in a sediment core taken from Profound Lake on the Fildes Peninsula (King George Island, South Shetland Islands).