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Mycological Progress

, Volume 11, Issue 3, pp 725–732 | Cite as

Amyloidity is not diagnostic for species in the Mycena pearsoniana complex (Mycena sectio Calodontes)

  • Christoffer Bugge HarderEmail author
  • D. Jean Lodge
  • Ronald H. Petersen
  • Karen W. Hughes
  • Joaquin Cifuentes Blanco
  • Tobias Guldberg Frøslev
  • Thomas Læssøe
Original Article

Abstract

In Mycena sectio Calodontes with otherwise amyloid spores, the inamyloid spores of Mycena pearsoniana Dennis ex Singer were a distinguishing feature for this species and its subsection Violacella. Although the original concept of this species was European, Singer chose to typify it with material collected in Mexico. The name has since been applied to all European collections with inamyloid spores and decurrent lamellae. Our phylogenetic analysis of 91 ITS sequences from European, North and South American Calodontes collections shows that European collections identified as M. pearsoniana fall into two well-supported sibling clades together with both inamyloid and weakly amyloid North American collections. Since the holotype of M. pearsoniana is in an advanced state of decay, we have selected an epitype from a North American locality with a climate comparable to the Mexican type locality. Our results show weakly and inamyloid spore reactions to be homoplastic in Calodontes, and furthermore that spores of M. pearsoniana can show either amyloid or inamyloid reactions interchangeably. This raises doubt about the taxonomic value of this trait in Mycena systematics.

Keywords

Mycena ITS phylogeny Amyloidity 

Notes

Acknowledgements

We thank the curator of the LILOA herbarium in Argentina for loaning the holotype of M. pearsoniana for study. Collecting in the Great Smoky Mountain National Park was supported by US National Science Foundation grant DBI 6338699 to K.W. Hughes and R.H. Petersen at the University of Tennesse, Knoxville. C.B. Harder was supported by The Danish Council for Strategic Research grant (2104-08-0012, MIRESOWA) at the time of the writing. The authors thank B.A. Perry and the following pre-reviewers for valuable comments on previous versions of the manuscript: K. O’Donnell, J. Geml and D.E. Desjardin.

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Copyright information

© Springer-Verlag (outside the USA) 2011

Authors and Affiliations

  • Christoffer Bugge Harder
    • 1
    Email author
  • D. Jean Lodge
    • 2
  • Ronald H. Petersen
    • 3
  • Karen W. Hughes
    • 3
  • Joaquin Cifuentes Blanco
    • 4
  • Tobias Guldberg Frøslev
    • 5
  • Thomas Læssøe
    • 6
  1. 1.Department of Biology, Terrestrial EcologyUniversity of CopenhagenCopenhagen KDenmark
  2. 2.Center for Forest Mycology Research, USDA-Forest ServiceNorthern Research StationLuquilloUSA
  3. 3.The University of TennesseeKnoxvilleUSA
  4. 4.Facultad de CienciasUNAM, Circuito Exterior, Ciudad UniversitariaMexico, D.F.E0Mexico
  5. 5.Laboratoriet FiladelfiaDianalundDenmark
  6. 6.Department of Biology, Ecology and EvolutionUniversity of CopenhagenCopenhagen ØDenmark

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