Fungalpedia – Note 2792, Ruzenia
Ruzenia. O. Hilber.
Citation when using this data: Huang SK et al. 2021 – Fungalpedia.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig 1
Classification: Helminthosphaeriaceae, Sordariales, Sordariomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi
Saprobic on wood. Sexual morph: Ascomata perithecial, scattered to gregarious, superficial, subglobose to obovoid, dark brown to black, rough, ostiolate, with papilla, periphysate. Peridium membranaceous, composed of brown to hyaline cells of textura angularis to textura prismatica. Asci 8-spored, unitunicate, cylindrical, pedicellate, apex rounded, with J- apical ring. Ascospores allantoid, 0–1-septate, hyaline, smooth-walled, guttulate. Asexual morph: Undetermined (adapted from Hilber and Hilber 2002).
Notes: The monotypic genus Ruzenia was introduced as similar to Lasiosphaeria (Hilber and Hilber 2002). Subsequently, its generic type, Ruzenia spermoides, was clarified as member of Helminthosphaeriaceae based on phylogenetic analyses (Miller and Huhndorf 2004a; Miller et al. 2014). In this study, Ruzenia is similar to Hilberina, but differs in having less ascomata setae, lacking basal spines on the ascospores and being hyaline. It is basal to Helminthosphaeria plumbea and Hilberina munkii in Helminthosphaeriaceae (90%ML/0.93PP).
Type species: Ruzenia spermoides (Hoffm.: Fr.) O. Hilber ex A. N. Mill. & Huhndorf, Mycological Research 108 (1): 31 (2004).
Other accepted species: Species Fungorum – search Ruzenia.
Figure 1 – Ruzenia spermoides: a–c, e, f, j, k (S-F242341); d, g–i, m, n (S-F242342). a Gregarious ascomata. b Ascomata on host. c, d Ascoma in cross section. e Peridium. f Asci with paraphyses. g–i. Asci. j–n Ascospores. Scale bars: b = 500 µm, c. d = 200 µm, e. g–i = 50 µm, f = 100 µm, j–n = 10 µm.
References
Hilber R, Hilber O 2002 – The Genus Lasiosphaeria and allied taxa, pp 1–9.
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 18 June 2026