• Media type: E-Article
  • Title: Splitting of Micrasterias fimbriata (Desmidiales, Viridiplantae) into two monophyletic species and description of Micrasterias compereana sp. nov
  • Contributor: Neustupa, Jiří; Št'astný, Jan; Škaloud, Pavel
  • Published: Royal Botanical Society of Belgium and the National Botanic Garden Meise, 2014
  • Published in: Plant Ecology and Evolution, 147 (2014) 3, Seite 405-411
  • Language: English
  • ISSN: 2032-3913; 2032-3921
  • Origination:
  • Footnote:
  • Description: Background - Micrasterias fimbriata, a conspicuous desmid species, has recently been shown to be composed of two clearly delimited monophyletic clades within the genus Micrasterias, closely related to several other well-defined Micrasterias species (M. brachyptera, M. rotata, M. torreyi). The members of both clades can also be unambiguously recognized by careful morphological analysis. In addition, their distribution areas in Europe and North America are largely vicariant. Interestingly, morphological features of one of the clades do not correspond with any of the previously described infraspecific taxa of M. fimbriata. Materials and Methods - The study was based on a combination of morphological and molecular phylogenetic analyses of the clonal strains and natural populations. Key results and Conclusion - In this study, we present formal taxonomic description of Micrasterias compereana for specimens formerly included within traditional M. fimbriata, but differring in their phylogenetic position and discriminative morphological characteristics. Phylogenetic analysis was based on the nuclear 18S rDNA and the plastid-encoded trnG ucc intron sequence data. Morphological differences between species were illustrated by light and scanning electron microscopy. The analysis of natural samples, strains and published records showed that M. compereana occurs in North America and western Europe. Conversely, M. fimbriata sensu stricto probably only occurs in temperate and boreal regions of Europe and Asia.
  • Access State: Open Access