Readerielliopsis

Fungalpedia – Note 1629, Readerielliopsis

 

Readerielliopsis Crous & Decock

Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig 1 

Classification: Readerielliopsidaceae, Capnodiales, Dothideomycetidae, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi

Endophytic or saprobic on angiosperms and Basidiomycota (Fuscoporia). The sexual morph is undetermined. The asexual morph is characterised by pycnidial conidiomata, which are brown, subglobose to pyriform, aggregated, somewhat papillate, unilocular and exuding a brown conidial mass. The ostiole is mostly single, rarely 1–2 lateral and located in the center. Conidiophores are reduced to conidiogenous cells which are lining the inner cavity. Conidiogenous cells are phialidic, pale brown, subglobose and with visible minute collarette at the apex. Conidia are brown, smooth-walled, solitary, globose to clavate or obdeltoid, mostly straight and rarely curved, and with three bluntly rounded ends (Crous et al. 2015, Wijayawardene et al. 2016).

Notes: Readerielliopsis was introduced by Crous et al. (2015) based on R. fuscoporiae as the type species. Readerielliopsis guyanensis was first introduced to Readeriella by Decock (2005) based on pycnidial conidiomata and the peculiar conidial shape. However, previous studies have shown that R. guyanensis is not related to Readeriella (Crous et al. 2009a,b). Therefore, Crous et al. (2015) introduced a new genus Readeriellopsis to accommodate R. fuscoporiae and R. guyanensis. Based on phylogeny, Readerielliopsis resides in Readerielliopsidaceae, while Readeriella resides in Teratosphaeriaceae (Abdollahzadeh et al. 2020). There are two species (R. fuscoporiae and R. guyanensis) listed under Readerielliopsis in Species Fungorum (May 2024) and15 sequence data available for these species in GenBank (May 2024). The updated taxonomic treatment of this genus is Readerielliopsidaceae, in Capnodiales (Dothideomycetes) (Wijayawardene et al. 2022, Hyde et al. 2024).

Type species: Readerielliopsis fuscoporiae Crous & Decock, Persoonia 34: 195 (2015)

Other accepted species: Species Fungorum – search Readerielliopsis.

 

 

Figure 1 – Readerielliopsis fuscoporiae (redrawn from Crous et al. 2015) a Squashed conidioma. b Conidiogenous cells and developing conidioma. c Conidia. Scale bars: a–c = 10 μm. (Originally published in Wijayawardene et al. (2016) and republished with authority)

 

References

Abdollahzadeh J, Groenewald JZ, Coetzee MPA, Wingfield MJ et al. 2020 – Evolution of lifestyles in Capnodiales. Studies in mycology 95(1), 381–414.

Crous PW, Schoch CL, Hyde KD, et al. 2009a. Phylogenetic lineages in the Capnodiales. Studies in Mycology 64, 17–47.

Crous PW, Summerell BA, Carnegie AJ et al. 2009b. Unravelling Mycosphaerella: do you believe in genera? Persoonia 23, 99–118.

Crous PW, Wingfield MJ, Guarro J, Hernandez-Restrepo M et al. 2015 – Fungal Planet description sheets: 320–370. Persoonia 34, 167–266.

Decock C. 2005 – Readeriella guyanensis sp. nov., a new coelomycetous fungus from French Guyana. Cryptogamie, Mycologie, 26(2).

Hyde KD, Noordeloos MT, Thiyagaraja V, He MQ et al. 2024 – The 2024 Outline of Fungi and fungus-like taxa. Mycosphere 15(1), 5146–6239.

Wijayawardene, NN, Hyde, KD, Wanasinghe, DN, Papizadeh, M et al. 2016 – Taxonomy and phylogeny of dematiaceous coelomycetes. Fungal diversity 77, 1–316.

Wijayawardene NN, Hyde KD, Dai DQ, Sánchez-García ML et al. 2022 – Outline of Fungi and fungus-like taxa–2021. Mycosphere 13(1), 53–453.

 

Entry by Chao Chen^1,2,3

Edited by Kevin D. Hyde^1,3 & Ishara S. Manawasinghe¹

 

¹Innovative Institute for Plant Health, College of Agriculture and Biology, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, Guangdong, P.R. China.

²Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand.

³Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, Thailand; School of Science, Mae Fah Luang University, Chiang Rai, Thailand.

 

Published online 2024-December 30.

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