Ascomycota, genera » Ascomycota, incertae sedis

Chaetosticta

Chaetosticta Petr. & Syd., Annls mycol. 23(3/6): 270 (1925)

= Pyrenochaeta subgen. Trichocicinnus Sacc., Annls mycol. 3(6): 512 (1906) [1905]

= Trichocicinnus (Sacc.) Höhn., in Weese, Ber. dt.bot. Ges. 37: 159 (1919)

Index Fungorum, Facesoffungi number FoF 09041, MycoBank, GenBank

Classification: incertae sedis, Dothideomycetes, Ascomycota, Fungi

 

Chaetosticta species are endophytic or pathogenic on leaves. The sexual morph is undetermined. The asexual morph is characterised by superficial conidiomata, which are pale brown, pycnidial, scattered, unilocular, setose and ostiolate. The ostiole is papillate, circular and located in the center. The conidiomatal wall is comprised of brown cells of textura angularis. The conidiomatal setae are pale brown and obtuse with septate. Conidiogenous cells are hyaline, phialidic, doliiform to ampulliform and smooth-walled. Conidia are hyaline, oblong to oblong-elliptical, aseptate to several septate, constricted at septa, thick and smooth-walled, with guttulate (Sutton 1980, Pem et al. 2019, Li et al. 2020).

 

Type species: Chaetosticta perforata (Ellis & Everh.) Petr. & Syd. 1925

 

Notes: Chaetosticta was revised by Petrak and Sydow (1925) based on C. perforata. Crane (1971) redescribed Chaetosticta and designated C. perforata as a lectotype. Sutton (1980) and Morgan-Jones et al. (1972) re-described and re-illustrated this genus. Pem et al. (2019) re-examined the type specimen of C. perforata from rom the fungal herbarium collections of Swedish Museum of Natural History, and regarded Chaetomella perforata and Pyrenochaeta erysiphoides as synonymys of C. perforata based on morphological characters. Currently, there are three species are listed in Chaetosticta in Species Fungorum (May, 2024). However, no sequence data are available for these species in GenBank (May, 2024). Molecular studies are necessary to determine the classification status of this genus. The updated taxonomic treatment of this genus is genera incertae sedis, in Dothideomycetes (Wijayawardene et al. 2022).

For all accepted species: search in Species Fungorum Chaetosticta

 

 

Chaetosticta perforata (a, c, e, f redrawn from Sutton 1980, b, d, g from Morgan-Jones et al. 1972e) a Surface view of a conidioma. b Vertical section of conidioma. c, d Conidiogenous cells and developing conidia. e Conidiomatal seta. f, g Conidia. Scale bars a–b = 100 μm, c–d, f–g = 10 μm, e = 20 μm. (Originally published in Li et al. (2020) and republished with authority)

 

References:

 

Crane JL. 1971 – Illinois fungi. 1. Chaetosticta. Canadian Journal of Botany 49, 31–34

Li WJ, McKenzie EH, Liu JK, Bhat DJ et al. 2020 – Taxonomy and phylogeny of hyaline-spored coelomycetes. Fungal Diversity 100, 279–801.

Morgan-Jones G, Nag Raj TR, Kendrick B 1972 – Icones generum coelomycetum IV. university of waterloo biology series 6, 35–36.

Pem D, Jeewon R, Bhat DJ, Doilom M et al. 2019 – Mycosphere notes 275–324: A morpho-taxonomic revision and typification of obscure Dothideomycetes genera (incertae sedis). Mycosphere 10(1), 1115–1246.

Petrak F, Sydow H. 1925 – Kritisch-systematische Originaluntersuchungen über Pyrenomyzeten, Sphaeropsideen und Melanconieen. Annales Mycologici. 23, 209–294.

Sutton BC. 1980 – The Coelomycetes. Fungi imperfecti with pycnidia, acervuli and stromata.Commonwealth Mycological Institute, Kew.

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, Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China, Ministry of Agriculture and Rural Affairs, Zhongkai University of Agriculture and Engineering, Guangzhou, People’s Republic of 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-May 30.

 

 

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