Haslea crucigeroides var. australis, var. nov. (Bacillariophyta), a new marine diatom from southern South America and Antarctica

A new variety of the marine diatom Haslea crucigeroides, H. crucigeroides var. australis, var. nov., is described here based on phytoplankton samples collected in sub-Antarctic coastal waters of the southern South America and Antarctica. The new taxon was characterized by using light and electron mi...

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Bibliographic Details
Published in:Phytotaxa
Main Authors: CEFARELLI, ADRIÁN O., MASCIONI, MARTINA, SIMONATO, JULIÁN, ALMANDOZ, GASTÓN O., VERNET, MARIA
Format: Article in Journal/Newspaper
Language:English
Published: Phytotaxa 2018
Subjects:
Diatom
Haslea crucigeroides
Beagle Channel
Antarctica
Algae
Antarctic
Antarc*
Online Access:http://www.mapress.com/j/pt/article/view/phytotaxa.357.3.2
https://doi.org/10.11646/phytotaxa.357.3.2
Description
Summary:A new variety of the marine diatom Haslea crucigeroides, H. crucigeroides var. australis, var. nov., is described here based on phytoplankton samples collected in sub-Antarctic coastal waters of the southern South America and Antarctica. The new taxon was characterized by using light and electron microscopy, and the holotype of H. crucigeroides, the only existing material type, was analyzed with light microscopy. Haslea crucigeroides var. australis differs from the nominal variety by having acute valve apices instead of acute rostrate; furthermore, it has a different geographical distribution. The species is being recorded in the Southern Hemisphere for the first time. Cell abundance and a brief discussion on the species habitat are also presented.

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