The demise of the genus Scotiellopsis Vinatzer (Chlorophyta)
The genus Scotiellopsis was established in 1975 by Vinatzer for a newly described species Scotiellopsis rubescens, but after revision by Punčochářová & Kalina in 1981 it included five species. The genus comprises coccoid green algae typically with apical thickenings and meridional ribs. Its similarity to another genus, Coelastrella Chodat, was noted, and indeed, two Scotiellopsis species were formally transferred to the genus Coelastrella on the basis of molecular evidence. Here we studied authentic strains of two more Scotiellopsis species, including the type species S. rubescens, to resolve the taxonomic status of the genus. Both 18S rDNA and ITS2 sequences indicate that S. rubescens cannot be separated from Coelastrella species on the generic level. We therefore propose a new combination Coelastrella rubescens, rendering Scotiellopsis a junior synonym of Coelastrella. The second species studied, Scotiellopsis reticulata, is shown to be closely related, if not conspecific, with Scenedesmus rubescens or Scenedesmus dissociatus representing the (sub) genus Acutodesmus. The position of the remaining Scotiellopsis species, Scotiellopsis levicostata, remains uncertain due to a lack of a culture.
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Document Type: Research Article
Publication date: November 1, 2013
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- Nova Hedwigia is an international journal publishing original, peer-reviewed papers on current issues of taxonomy, morphology, ultrastructure and ecology of all groups of cryptogamic plants, including cyanophytes/cyanobacteria and fungi. The half-tone plates in Nova Hedwigia are known for their high quality, which makes them especially suitable for the reproduction of photomicrographs and scanning and transmission electron micrographs.
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