Fungalpedia – Note 1478, Chaetosticta

 

Chaetosticta. Petr. & Syd.

Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig 1

Classification: Pseudoperisporiaceae, Incertae sedis, Dothideomycetidae, Dothideomycetes, Pezizomycotina, 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).

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

 

Type species: Chaetosticta perforata (Ellis & Everh.) Petr. & Syd., Annls mycol. 23(3/6): 270 (1925).

 

image

 

Figure 1 – 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.

Back to Glossary Index Page