Fungalpedia – Note 706, Actinocymbe

 

Actinocymbe Höhn.

Citation when using this data: D. S. Marasinghe et al. 2023 (in prep.) – Fungalpedia, Ascomycota.

Index Fungorum, Facesoffungi, MycoBank, GenBank.

Classification: Chaetothyriaceae, Chaetothyriales, Chaetothyriomycetidae, Eurotiomycetes, Pezizomycotina, Ascomycota, Fungi 

Epiphytic on leaves. Superficial mycelium greyish brown, branched, septate, appressed to the cuticle. Sexual morph: Ascomata solitary to scattered, superficial, brown to dark brown, subglobose to globose with periphysate ostioles. Ascomatal setae scattered to clustered, dark brown to black, erect, rounded at the base and wider than the apex. Peridium multi-layered, externally comprising pigmented, dark brown, thick-walled cells of textura angularis, with inner layer thinner, composed of irregularly-shaped, lightly pigmented to hyaline, thin-walled cells. Hamathecium of hyaline paraphyses. Asci 8-spored, bitunicate, clavate, long pedicellate, straight to slightly curved, ocular chamber not apparent. Ascospores overlapping multi-seriate, oblong-ellipsoid, tapering at the ends, hyaline, 9-septate, slightly constricted at the septa, smooth and thick-walled. Asexual morph: Undetermined (Tian et al. 2021).

Notes: Höhnel (1911) established Actinocymbe with the type species of Actinocymbe separato-setosa. Species of this genus are characterized by setose ascomata, periphysate ostioles and oblong-ellipsoid ascospores (Höhnel 1911; von Arx and Müller 1975; Verma and Kamal 1987). Tian et al. (2021) placed this genus in Chaetothyriaceae based on the ascomata with setae, periphysate ostioles and oblong-ellipsoid, multi-septate ascospores.

Type species Actinocymbe separato-setosa (Henn.) Höhn., Sber. Akad. Wiss. Wien, Mathnaturw. Kl., Abt. 1 120: 416 (1911)

Other accepted species:  species Fungorum – search Actinocymbe. 

 

References

Tian Q, Chomnunti P, Lumyong S et al 2021 – Phylogenetic relationships and morphological reappraisal of Chaetothyriales. Myco- sphere 12:1157–1261.

Verma RK, Kamal R 1987 – Studies on foliicolous ascomycotina-III. Some interesting bitunicati. Indian Phytopathol 40:410–413.

von Arx JA, Müller E 1975 – A re-evaluation of the bitunicate Asco- mycetes with keys to families and genera. Stud Mycol 9:1–159.

von Höhnel FXR 1911 – Fragmente zur Mykologie XIII (713): Über Leptosphaeria maculans (Desm.) und Sphaeria lingam Tode. Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften in Wien. (Mathematisch–naturwissenschaftliche Klasse (Abteilung I) 120:458–463.

 

Entry by 

Diana Sandamali Marasinghe, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, 57100, Thailand School of Science, 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

 

Published online 29 August 2023

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