Mycological Progress

, Volume 11, Issue 3, pp 699–710 | Cite as

The taxonomic position of the genus Heydenia (Pyronemataceae, Pezizales) based on molecular and morphological data

  • Adrian LeuchtmannEmail author
  • Heinz Clémençon
Original Article


Molecular and morphological data indicate that the genus Heydenia is closely related to the cleistothecial ascomycete Orbicula (Pyronemataceae, Pezizales). Observations on the disposition and the immediate surroundings of immature spores within the spore capsule suggest that the Heydenia fruiting bodies are teleomorphs producing early evanescent asci in stipitate cleistothecia. The once advocated identity of Heydenia with Onygena is refuted on molecular grounds. Onygena arietina E. Fischer is transferred to Heydenia.


Ascomycota Beta tubulin Cleistothecium Histology nuLSU Orbicula Phylogeny 



We thank Beatrice Blattmann for help with the molecular lab work, Reinhard Berndt (curator of ZT) and Bart Buyck (curator of PC) for loans of herbarium specimens; Beatrice Senn-Irlet (WSL Birmensdorf) and H.U. Aeberhard (Biberist, Switzerland) for collecting fresh material of H. alpina; Beatrice Senn-Irlet for locating Fischer's material of « Onygena » arietina at the University of Bern; Sylvie and Roland Stegmann (Zuchwil, Switzerland) for giving us their collection of fresh H. arietina and Erich Zimmermann (Lüterswil, Switzerland) for the macro photography of that collection; and P.A. Moreau (University of Lille, France) for providing a collection of H. alpina.


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Copyright information

© German Mycological Society and Springer 2011

Authors and Affiliations

  1. 1.Ökologische PflanzengenetikInstitut für Integrative Biologie, ETH ZürichZürichSwitzerland
  2. 2.Musée botanique cantonalLausanneSwitzerland

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