Rhagadostoma

Fungalpedia – Note 829, Rhagadostoma

 

Rhagadostoma Körb.

Citation when using this data: Huang SK et al. 2021 (in prep.) – Fungalpedia, Ascomycota.

Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig. 1

Classification: Nitschkiaceae, Coronophorales, Hypocreomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi

Saprobic or parasitic on lichen. Sexual morph: Subiculum absent or composed of brown to dark brown, septate, branched, sinuous hyphae. Ascomata perithecial, gregarious, superficial, sitting on or in a subiculum, carbonaceous, black, globose to subglobose, tuberculate, the apex collapsing when dry, with periphyses inside of the inconspicuous ostioles. Peridium composed of membranaceous, brown to hyaline cells of textura angularis to textura prismatica, Munk pores present. Paraphyses absent or unbranched or branched, septate. Asci 2- to 8-spored, unitunicate, clavate, apex rounded and thickening, apical ring inconspicuous, pedicellate, evanescent. Ascospores bi-seriate to overlapping, hyaline to brown, 1-septate, rarely multi-septate, ellipsoidal, broadly fusiform to cylindrical, sometimes slightly curved, smooth-walled, mostly with guttules. Asexual morph: Undetermined (adapted from Navarro-Rosinés & Hladun 1994, Navarro-Rosinés et al. 1999).

Notes – Körber (1865) established Rhagadostoma based on R. corrugatum. Subsequently, Saccardo (1882a) stated that R. corrugatum is a synonym of Bertia lichenicola, and Keissler (1930) introduced R. lichenicola as the current name of B. lichenicola and R. corrugatum. However, the first identified R. corrugatum is regarded as the name of the type species of Rhagadostoma (Maharachchikumbura et al. 2016, Hyde et al. 2020e). This lichenicolous genus was initially placed in Sordariales (Navarro-Rosinés & Hladun 1994, Navarro-Rosinés et al. 1999). Huhndorf et al. (2004b) proposed that Rhagadostoma is morphologically related to Bertia but its phylogenetic position remains unknown. However, subsequently, this genus was assigned to Nitschkiaceae (Lumbsch & Huhndorf 2010, Hyde et al. 2020e, Index Fungorum 2021).

Type species: Rhagadostoma corrugatum Körb., Parerga lichenol. (Breslau) 5: 472 (1865).

Other accepted species: Species Fungorum – search Rhagadostoma

 

 

Figure 1 – Rhagadostoma corrugatum: (NY-03380689). a Material. b–d Ascomata on the host. e Ascoma cross section. f Munk pores (arrow). g Subiculum composed of brown hyphae. h Peridium. i Ascus. j–q Ascospores. Scale bars: b = 1 mm, c–d = 500 µm, e = 200 µm, h = 100 µm, g, i = 50 µm, f, j–q = 20 µm.

 

References

Huhndorf SM, Miller AN, Fernández FA. 2004b – Molecular systematics of the Coronophorales and new species of Bertia, Lasiobertia and Nitschkia. Mycological Research 108(12), 1384–1398.

Hyde KD, Norphanphoun C, Maharachchikumbura SSN, Bhat DJ et al. 2020e – Refined families of Sordariomycetes. Mycosphere, 11(1), 305–1059.

Keissler Kv. 1930 – Rabenhorst’s Kryptogamen-Flora, Pilze – Die Flechtenparasiten. 2(8), 1–712.

Körber GW. 1865 – Parerga lichenologica. Ergänzungen zum Systema lichenum Germaniae, 385-501.

Lumbsch HT, Huhndorf SM. 2010 – Myconet Volume 14. Part One. Outline of Ascomycota – 2009. Part Two. Notes on Ascomycete Systematics. Nos. 4751–5113. Fieldiana Life and Earth Sciences 2010(1), 1–64.

Maharachchikumbura SSN, Hyde KD, Jones EBG, McKenzie EHC et al. 2016 – Families of sordariomycetes. Fungal Diversity 79, 1–317.

Navarro-Rosinés P, Hladun N. 1994 – Datos sobre el género Rhagadostoma (ascomicetes liquenícolas, Sordariales). Bull Soc linn Provence 45, 431–442.

Navarro-Rosinés P, Etayo J, Calatayud V. 1999 – Rhagadostoma collematum sp. nov.(ascomicetes liquenícolas, Sordariales) y nuevos datos para otras especies del género. Bull Soc linn Provence 50, 233–241.

Saccardo PA. 1882a – Sylloge Pyrenomycetum, Vol. I. Sylloge Fungorum 1, 1–768.

 

Entry by

Shi-Ke Huang, State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, China, The Engineering Research Center of Southwest Bio-Pharmaceutical Resources, Ministry of Education, Guizhou University, Guiyang 550025, Guizhou Province, China, 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, The Mushroom Research Centre, Guizhou University, Guiyang 550025, China

 

Published online 14 September 2021

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