Morphologically similar but not closely related: the long-spored species of Subulicystidium (Trechisporales, Basidiomycota)

Alessandro Saitta, Alexander Ordynets, Sergey Volobuev, Ewald Langer, Ludmila Lysenko, David Scherf, Robert Liebisch, Sergey Bolshakov, Bart Buyck, Eugene Yurchenko, Karl-Henrik Larsson

Risultato della ricerca: Articlepeer review

Abstract

Species boundaries and geographic distribution of corticioid fungi (resupinate Basidiomycota) are often poorly known. Our recent study on Subulicystidium showed that species diversity in this genus is at least twice as high as previously recognized. This re-estimation of the species diversity was based on a study of only a part of the genus. The present study sheds light on molecular and morphological diversity of three more species. We generated 27 ITS and 24 28S nuclear ribosomal DNA sequences from 49 specimens labelled as Subulicystidium cochleum, S. longisporum and S. perlongisporum and collected in distant geographic localities. We assessed pairwise dissimilarities and phylogenetic relationships of DNA sequences with Bayesian and maximum likelihood methods. We correlated phylogenetic information with morphological data on spores and cystidia. We found that the three species are not closely related, despite their similarity in spore shape and size. In one of the species, S. perlongisporum, we detected the presence of two sympatric lineages. These lineages are not morphologically distinct, except for a small difference in the mean length of cystidia. Our study provides a further example of transoceanic species distribution in Agaricomycetes.
Lingua originaleEnglish
pagine (da-a)691-703
Numero di pagine13
RivistaMycological Progress
Volume19
Stato di pubblicazionePublished - 2020

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Agricultural and Biological Sciences (miscellaneous)

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