Fungalpedia – Note 812, Chaetosphaerellaceae

 

Chaetosphaerellaceae Huhndorf, A.N. Mill. & F.A. Fernández

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

Index Fungorum, Facesoffungi, MycoBank, GenBank.

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

Saprobic on wood. Sexual morph: Subiculum absent or extensive, composed of densely clustered, abundant, dark brown to black, septate, rigid, branched, spinulose hyphae with dichotomously branched, tapering ends. Ascomata perithecial or without an external opening, scattered or densely gregarious, superficial or sitting on or in a subiculum, turbinate, globose to subglobose, carbonaceous or coriaceous, tuberculate, black, glabrous or with brown, cylindrical, spinous setae or black tooth-like spines, ostiolate with papilla or lacking ostioles with Quellkörper, collabent or not. Peridium carbonaceous to coriaceous to membranaceous, composed of brown to hyaline cells of textura angularis to textura prismatica, sometimes Munk pore present. Paraphyses numerous, filiform or broadly cylindrical, septate, inflated, sometimes present only in young ascomata. Asci 8-spored, unitunicate, clavate to cylindrical, with long or short pedicel, apical ring or inconspicuous, evanescent. Ascospores uni- or bi-seriate or overlapping, hyaline, becoming brown or brown median cells and hyaline end cells, ellipsoidal to cylindrical, 1–3-septate, smooth-walled, mostly with guttules. Asexual morph: Hyphomycetous. Conidiophores macronematous, mononematous, brown to dark brown, pale brown towards the apex, occasionally pale towards the base, branched, septate. Conidiogenous cells terminal and intercalary, polyblastic, holoblastic, brown, swollen, globose to subglobose. Conidia solitary, multiple conidia are produced serially from a retrogressive locus, usually central cell dark brown and end cell subhyaline to hyaline, 1–3-septate, oval to ellipsoidal (adapted from Müller & Booth 1972, Sivanesan 1974, Réblová 1999a, b).

Notes – Chaetosphaerellaceae was established by Huhndorf et al. (2004b) and initially accommodated Chaetosphaerella and Crassochaeta based on phylogenetic results. Subsequently, Mugambi & Huhndorf (2010) found that Spinulosphaeria exists independently in Coronophorales based on LSU sequence data analysis. These three genera were accepted in Chaetosphaerellaceae, because they have similar characteristics of turbinate, tuberculate, black ascomata sitting on hyphal subiculum, clavate asci and ellipsoidal ascospores, and they clustered based on multi-gene analyses (Maharachchikumbura et al. 2015, 2016, Hyde et al. 2017). In this study, Chaetosphaerellaceae clade, which accommodates Chaetosphaerella, Crassochaeta and Spinulosphaeria, nests in Coronophorales (99%ML/1.00BY).

Type genus: Chaetosphaerella E. Müll. & C. Booth

 

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, Maharachchikumbura SSN, Hongsanan S, Samarakoon MC et al. 2017 – The ranking of fungi: a tribute to David L. Hawksworth on his 70th birthday. Fungal Diversity 84(1), 1–23.

Maharachchikumbura SSN, Hyde KD, Jones EBG, McKenzie EHC et al. 2015 – Towards a natural classification and backbone tree for Sordariomycetes. Fungal Diversity 72, 199–301.

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

Mugambi GK, Huhndorf SM. 2010 – Multigene phylogeny of the Coronophorales: morphology and new species in the order. Mycologia 102(1), 185–210.

Müller E, Booth C. 1972 – Generic position of Sphaeria phaeostroma. Transactions of the British Mycological Society 58(1), 73–77.

Réblová M. 1999a – Studies in Chaetosphaeria sensu lato I. The genera Chaetosphaerella and Tengiomyces gen. nov. of the Helminthosphaeriaceae. Mycotaxon 70, 387–420.

Réblová M. 1999b – Studies in Chaetosphaeria sensu lato IV. Crassochaeta gen. nov., a new lignicolous genus of the Trichosphaeriaceae. Mycotaxon 71, 45–67.

Sivanesan A. 1974 – Two new genera of Coronophorales with descriptions and key. Transactions of the British Mycological Society 62(1), 35–43.

 

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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