Fungalpedia – Note 2928, Hydropisphaera
Hydropisphaera Dumort., Comment. bot. (Tournay): 89 (1822).
Citation when using this data: Perera RH et al. 2023 – Fungalpedia.
Index Fungorum, Facesoffungi, MycoBank, GenBank.
Classification Nectriaceae, Hypocreales, Hypocreomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi.
Saprobic on dead herbaceous or well-rotten woody substrates, dead leaves, dung, some are fungicolous. Sexual morph: Ascomata astromatic, superficial, perithecial, globose to subglobose or doliliform, often collapsed and cupulate when dry, yellow, orange to brown, KOH-, lactic acid-, surface smooth or with fasciculate hairs, with a papillate apex, ostiolate. Peridium greater than 110 µm thick, composed of two strata, outer stratum consisting of large, thin-walled cells and inner stratum of flattened hyaline cells. Paraphyses not observed. Asci 8-spored, unitunicate, clavate, apices rounded, with or without a J- apical ring. Ascospores bi-seriate, obliquely uniseriate, fusiform, aseptate or one-septate to multi-septate, rarely slightly constricted, often bi-guttulate, hyaline, generally striate, sometimes verrucose, rarely smooth or spinulose. Asexual morph: Hyphomycetous, mostly acremonium-like, rarely gliomastix-like. Conidiophores occurring on aerial hyphae, macronematous, mononematous, unbranched, elongate, erect, straight to flexuous, hyaline to light brown, surface smooth to very faintly roughened. Conidiogenous cells sparse, integrated, monophialidic, terminal, aseptate, long, narrow, tapering towards the apex, rarely with a minutely flared collarette. Conidia occurring at apex of conidiogenous cells, variable in length, ellipsoidal with rounded ends or obpyriform to fusiform, aseptate, hyaline or becoming dark brown, walls smooth to verrucose, forming small globose heads, rarely solitary or catenulate in short chains (Rossman et al. 1999; Luo and Zhuang 2010; Lechat et al. 2010, Lechat and Fournier 2020).
Known distribution: Cosmopolitan, common in temperate areas
Notes: Dumortier (1822) introduced Hydropisphaera based on Hydropisphaera peziza as the type. However, Hydropisphaera was treated as a synonym of Nectria for decades by subsequent authors (Booth 1959, Samuels 1976a, Rossman 1983). Rossman et al. (1999) resurrected the genus in Bionectriaceae to accommodate taxa that had earlier been recognised in the N. peziza group (Dingley 1951b; Booth 1959, Samuels 1976a; Rossman 1983). Hydropisphaera is distinguishable from other nectria-like taxa as Hydropisphaera has a relatively thick peridium (usually greater than 25 µm), that comprises large thin-walled globose cells (Rossman et al. 1999). Rossman et al. (1999) made 17 species additions to the genus. Thirty species are accommodated in Hydropisphaera (Lechat and Fournier 2020; Lechat et al. 2010).
Type species: Hydropisphaera peziza (Tode) Dumort., Comment. bot. (Tournay): 90 (1822).
= Sphaeria peziza Tode, Fung. mecklenb. sel. (Lüneburg) 2: 46 (1791).
Other accepted species: Species Fungorum – search Hydropisphaera.
References
Booth C 1959 – Studies of Pyrenomycetes. IV. Nectria. Mycological Papers 73:1–115.
Dingley JM 1951b – The Hypocreales of New Zealand. II, Trans Roy Soc New Zealand 79:177–202.
Dumortier BCJ 1822 – Commentationes Botanicae. C. Casterman-Dieu.
Rossman AY 1983 – The phragmosporous species of Nectria and related genera (Calonectria, Ophionectria, Paranectria, Scoleconectria and Trichonectria). Mycol Pap 150:1–164.
Rossman AY, Samuels GJ, Rogerson CT et al. 1999 — Genera of Bionectriaceae, Hypocreaceae and Nectriaceae (Hypocreales, Ascomycetes). Stud Mycol 42:1–248.
Entry by
Perera RH, Guizhou Key Laboratory of Agricultural Biotechnology, Guizhou Academy of Agricultural Sciences, Guiyang, Guizhou 550006, P. R. 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, Mushroom Research Foundation, 128 M.3 Ban Pa Deng T. Pa Pae, A. Mae Taeng, Chiang Mai 50150, Thailand.
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