Generic circumscriptions in Geoglossomycetes

V. P. Hustad, A. N. Miller, B. T.M. Dentinger, P. F. Cannon

Research output: Contribution to journalArticlepeer-review


The class Geoglossomycetes is a recently created class of Ascomycota, currently comprised of one family (Geoglossaceae) and five genera (Geoglossum, Nothomitra, Sarcoleotia, Thuemenidium and Trichoglos-sum). These fungi, commonly known as earth tongues, have long been a subject of mycological research. However, the taxonomy within the group has historically been hindered by the lack of reliable morphological characters, uncertain ecological associations, and the inability to grow these fungi in culture. The phylogenetic relationships of Geoglossomycetes were investigated by conducting maximum likelihood and Bayesian analyses using a 4-gene dataset (ITS, LSU, MCM7, RPB1). Five well-supported monophyletic clades were found that did not correspond exactly with the currently recognised genera, necessitating a taxonomic revision of the group. Two new genera are proposed: Glutinoglossum to accommodate G. glutinosum and the newly described species G. heptaseptatum, and Sabuloglossum to accommodate S. arenarium. The type species of Thuemenidium, traditionally included within the Geoglossaceae, is confirmed as belonging to a separate lineage that is only distantly related to Geoglossomycetes.

Original languageEnglish (US)
Pages (from-to)101-111
Number of pages11
JournalPersoonia: Molecular Phylogeny and Evolution of Fungi
StatePublished - Dec 2013


  • Ascomycota
  • Earth tongues
  • Geoglossum
  • Microglossum
  • Phylogenetics
  • Systematics

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics


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