Fungalpedia – Note 2227, Chaetothyrina

 

Chaetothyrina Theiss.

Citation when using this data: Hongsanan S et al. 2020 – Fungalpedia, Ascomycota.

Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig 1

Classification: Micropeltidaceae, Microthyriales, Incertae sedis, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi

This genus causes flyspeck disease on various plants and fruits. Chaetothyrina was placed in Micropeltidaceae based on its flattened thyriothecium, with interwoven cells (Wu et al. 2011, Hongsanan et al. 2017). Chaetothyrina however, differs from other genera in Micropeltidaceae in having inconspicuous superficial hyphae (sometimes this may be absent), dark brown thyriothecia with setae, and 1-septate ascospores (Reynolds & Gilbert 2005, Singtripop et al. 2016, Hongsanan et al. 2017); Micropeltidaceae species have bluish or greenish to black thyriothecia, with multi-septate ascospores (Wu et al. 2011, Hongsanan et al. 2015a). Phylogenetically, Chaetothyrina clusters within the new family Phaeothecoidiellaceae, Capnodiales (Hongsanan et al. 2017).

Type species: Chaetothyrina musarum (Speg.) Theiss., Annls mycol. 11(6): 495 (1913). 

≡ Chaetothyrium musarum Speg., Anal. Mus. nac. Hist. nat. B. Aires 6: 297 (1898).

Other accepted species: Species Fungorum – search Chaetothyrina.

 

image

 

Figure 1 – Chaetothyrina musarum (BPI 646468). a, b Herbarium specimens. c Thyriothecium on host surface. d Thyriothecia when viewed in squash mount. e Section through thyriothecium. f Seta arising from the surface of thyriothecium. g Upper wall of thyriothecium when viewed in squash mount. h, i Asci. j, k Ascospores. Scale bars: d = 100 μm, e, f = 50 μm, g–i = 10 μm, j, k = 5 μm.

 

References

Hongsanan S, Hyde KD, Bahkali AH, Camporesi E et al. 2015a – Fungal biodiversity profiles 11–20. Cryptogamie Mycologie 36, 355–380.

Hongsanan S, Zhao RL, Hyde KD. 2017 – A new species of Chaetothyrina on branches of mango, and introducing Phaeothecoidiellaceae fam. nov. Mycosphere 8, 137–146.

Reynolds DR, Gilbert GS. 2005 – Epifoliar fungi from Queensland, Australia. Australian Systematic Botany 18, 265–289.

Singtripop C, Hongsanan S, Li JF, de Silva NI et al. 2016 – Chaetothyrina mangiferae sp. nov., a new species of Chaetothyrina. Phytotaxa 255, 21–33.

Wu HX, Schoch CL, Boonmee S, Bahkali AH. 2011 – A reappraisal of Microthyriaceae. Fungal Diversity 51, 189–248.

 

Entry by

Sinang Hongsanan, Guangdong Provincial Key Laboratory for Plant Epigenetics, Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Science and Oceanography, Shenzhen University, Shenzhen 518060, People’s Republic of China, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand, Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50002, Thailand 

 

Published online 25 March 2026

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