Fungalpedia – Note 1392 , Pyrenomyxa

 

Pyrenomyxa. Morgan.

Citation when using this data: Hyde KD et al. 2020 (in prep.) – Fungalpedia, Ascomycota.

Index Fungorum, Facesoffungi, MycoBank, GenBank

Classification: Hypoxylaceae, Xylariales, Xylariomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi

Notes – Stromata of Pyrenomyxa are similar too species of the H. rubiginosum complex when collected in the field, but their ascal morphology is different, since they feature subglobose asci in which phaseoliform, laterally compressed ascospores are arranged in a similar manner to the slices of an orange fruit. The ascospores are not forcibly discharged as in most other Hypoxylaceae genera aside from Phylacia, Rhopalostroma and Thamnomyces, but they are released from the mature stromata in powdery masses. 

A comparison of morphological features and secondary metabolite profiles of Pyrenomyxa invocans, Hypoxylon piceum and Pulveria porrecta were evaluated by Stadler et al. (2005) and it was concluded that they are congeneric with Pyrenomyxa which is the older name and takes preference. The molecular data and the secondary metabolite profiles (rubginosins and hypomiltins as prevailing stromatal metabolites) clearly suggest that this genus has affinities with Hypoxylon. 

Type species: Pyrenomyxa invocans Morgan, J. Cincinnati Soc. Nat. Hist. 18: 42 (1895)

Other accepted species: Species Fungorum – search Pyrenomyxa.

 

References

Stadler M, Hellwig V. 2005 – Chemotaxonomy of the Xylariaceae and remarkable bioactive compounds from Xylariales and their associated asexual stages. Recent Research Developments in Phytochemistry 9, 41–93.

 

Entry by

Kevin David Hyde, Institute of Plant Health, Zhongkai University of Agriculture and Engineering, Haizhu District, Guangzhou 510225, P.R. China, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand, Mushroom Research Foundation, 128 M.3 Ban Pa Deng T. Pa Pae, A. Mae Taeng, Chiang Mai 50150, Thailand, Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand, Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Science, Kunming 650201, Yunnan, P.R. China, School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand, World Agroforestry Centre, East and Central Asia, Kunming 650201, Yunnan, P.R. China

 

Published online 28 February 2020

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