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Type: Article
Published: 2023-07-05
Page range: 81-89
Abstract views: 209
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Orthoseira groenlandica sp. nov., a new aerophilic diatom (Orthoseirales, Bacillariophyta) species from Greenland

Meise Botanic Garden, Research Department, Nieuwelaan 38, 1860 Meise, Belgium ; Ghent University, Protistology & Aquatic Ecology, Campus de Sterre, Gent, Belgium
Department of Ecology and Environmental Protection, University of Rzeszów, Zelwerowicza 4, 35-601 Rzeszów, Poland
Meise Botanic Garden, Research Department, Nieuwelaan 38, 1860 Meise, Belgium; University of Antwerp, Department of Biology – ECOSPHERE, Universiteitsplein 1, B-2610 Wilrijk, Belgium
Orthoseira Greenland new species morphology Algae

Abstract

During the survey of the moss-inhabiting diatoms in samples from Greenland, an unknown Orthoseira taxon was observed that was originally identified as O. roeseana but differed from the recently published lectotype population of the latter. Comparison with all known Orthoseira taxa worldwide showed that the unknown taxon represented a new species that is described as O. groenlandica, sp. nov. based on detailed light and scanning electron microscopy. The combination of the unique, rather chaotic valve face and mantle surface ornamentation, the absence of caverns and marginal pore fields, the presence of robust, short spines, and the absence of chain-like colonies has not been observed so far in any known Orthoseira species. The morphology of the new species is discussed comparing it with the morphology of all other Orthoseira species worldwide by carefully analysing the different morphological features observed so far in members of the genus Orthoseira. Brief notes on the ecology of the sample where the new species was found are added.

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