Fungalpedia – Note 1961, Requienellaceae

 

Requienellaceae Boise

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

Index Fungorum, Facesoffungi, MycoBank, GenBank.

Classification: Pyrenulales, Chaetothyriomycetidae, Eurotiomycetes, Pezizomycotina, Ascomycota, Fungi

Saprobic on dead wood or pathogenic on plants. Sexual morph: Ascomata immersed or erumpent, globose to subglobose base with prominent apex, solitary or aggregated, perithecioid, sometimes whitish, greyish to black at the margin. Ostiole inconspicuous or strongly erumpent, flattened or papillate to conical, black. Peridium comprising thick-walled angular cells, thickened in upper regions. Paraphyses numerous, apically free, aseptate, curved, scarcely branched. Asci 8- spored, unitunicate, cylindrical, subfusiform to narrowly clavate, with thick-walled apex, wide ocular chamber comprising a slightly refractive, inversely funnel-shaped dome, turning slightly reddish in Congo Red. Ascospores uni – to biseriate, olivaceous or brown, ellipsoid to oblong, with round or acute ends, with one or several transverse distosepta and large lumina. Asexual morph: Undetermined (adapted from Jaklitsch et al. 2016b).

Notes: Requienellaceae has historically been treated in Melanommatales (Barr 1990a) based on its trabeculate-like paraphyses (Liew et al. 2000). Aptroot (1991) followed this and added more lichenised taxa to the non-lichenised Requienella. Jaklitsch et al. (2016b) determined Requienellaceae as a distinct family in Xylariales based on the DNA based sequence analyses of its generic type. Phylogenetically this family is a strongly supported monophyletic lineage sister to the taxa in Cainiaceae (Jaklitsch et al. 2016b). Currently the family comprises four genera viz. Acrocordiella (Jaklitsch et al. 2016b), Lacrymospora, Parapyrenis and Requienella (Wijayawardene et al. 2018a).

Type genus: Requienella Fabre.

 

References

Aptroot A. 1991 – A monograph of the Pyrenulaceae (excluding Anthracothecium and Pyrenula) and the Requienellaceae, with notes on the Pleomassariaceae, the Trypetheliaceae, and Mycomicrothelia (lichenized and non-lichenized ascomycetes). Bibliotheca Lichenologica 44, 1–178.

Barr ME. 1990a – Melanommatales (Loculoascomycetes). North American Flora, Series 2, part 13. New York Botanical Garden, New York.

Liew ECY, Aptroot A, Hyde KD. 2000 – Phylogenetic significance of the pseudoparaphyses in Loculoascomycete taxonomy. Molecular Phylogeny & Evolution 16: 392–402.

Jaklitsch WM, Gardiennet A, Voglmayr H. 2016b – Resolution of morphology-based taxonomic delusions: Acrocordiella, Basiseptospora, Blogiascospora, Clypeosphaeria, Hymenopleella, Lepteutypa, Pseudapiospora, Requienella, Seiridium and Strickeria. Persoonia 37, 82–105.

Wijayawardene NN, Hyde KD, Lumbsch HT, Liu JK et al. 2018a – Outline of Ascomycota: 2017. Fungal Diversity 88, 167–263.

 

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 6 March 2026

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