Fungalpedia – Note 1951, Pseudoplagiostomataceae

 

Pseudoplagiostomataceae Cheew., M.J. Wingf. & Crous

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

Index Fungorum, Facesoffungi, MycoBank, GenBank.

Classification: Diaporthales, Diaporthomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi

Pathogen on leaves, forming spots. Sexual morph: Ascomata solitary, immersed, scattered, slanted to horizontal on host tissue, globose or ellipsoidal, black, coriaceous, papillate, ostiolate. Papilla short, internally covered with hyaline, periphyses. Peridium composed of few layers of brown, thick-walled cells of textura angularis. Paraphyses lacking. Asci 8-spored, unitunicate, apedicellate, cylindrical, with J-, subapical ring. Ascospores overlapping uniseriate to biseriate, hyaline, fusiform to ellipsoid, 1-septate, with terminal, elongate, hyaline appendages. Asexual morph: Coelomycetous. Conidiomata brown, acervular or pycnidial. Peridium comprising small, brown cells of textura angularis. Conidiophores reduced to conidiogenous cells. Conidiogenous cells enteroblastic, cylindrical to ampulliform, percurrently proliferating with periclinal thickening and collarette. Conidia unicellular, ellipsoid, hyaline to brown, subglobose to broadlyallantoid, with obtuse apex and a flat protruding scar at the base (adapted from Cheewangkoon et al. 2010).

Notes: Pseudoplagiostomataceae is distinct from other related families due to its unique morphology with ascomata slanted horizontally to the host with an aparaphysate hamathecium and ascospores with terminal, elongate, hyaline appendages. It has a distinct placement in Diaporthales based on the maximum parsimony analysis of LSU sequence data (Cheewangkoon et al. 2010). This placement was confirmed by the studies of Suwannarach et al. (2016), Du et al. (2017) and Phookamsak et al. (2019).

Type genus: Pseudoplagiostoma Cheew. Cheew., M.J. Wingf. & Crous.

Other accepted species: Species Fungorum – search Pseudoplagiostomataceae.

 

References

Cheewangkoon R, Groenewald JZ, Verkley GJM, Hyde KD et al. 2010 – Re-evaluation of Cryptosporiopsis eucalypti and Cryptosporiopsis-like species occurring on Eucalyptus leaves. Fungal Diversity 44, 89–105.

Du Z, Hyde KD, Yang Q, Liang YM et al. 2017 – Melansporellaceae: a novel family of Diaporthales (Ascomycota). Phytotaxa 305, 191–200.

Phookamsak R, Hyde KD, Jeewon R, Bhat DJ et al. 2019 – Fungal diversity notes 929–1035: taxonomic and phylogenetic contributions on genera and species of fungi. Fungal Diversity 95, 1–273.

Suwannarach N, Kumla J, Lumyong S. 2016 – Pseudoplagiostoma dipterocarpi sp. nov., a new endophytic fungus from Thailand. Mycoscience 57, 2.

 

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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