Hypomyces (Fr.) Tul.&C. Tul.,Annls Sci. Nat., Bot., sér. 4 13: 11 (1860)

MycoBank number: MB 2446; Index Fungorum number: IF 2446; Facesoffungi number: FoF 10847; 115 morphological species (Species Fungorum 2020), 54 species with sequence data.

Type speciesHypomyces lactifluorum (Schwein.) Tul. & C. Tul.

NotesHypomyces species are fungicolous, mostly on mushrooms (Agaricales, Boletales), bracket fungi (Poriales) and discomycetes (Helotiales, Pezizales) (Rossman et al. 1999, Põldmaa 2011, Zeng & Zhuang 2016, Wei & Kirschner 2017). Arnold (1970) introduced the fungicolous genus Sibirina based on S. fungicola. Sibirina was synonymyzed under Cladobotryum by Rogerson & Samuels (1993), and was followd by Põldmaa (2003). However the name Hypomyces was protected against Cladobotryum by Rossman et al. (2013). Hence here we consider Sibrina as a synonym of Hypomyces by following Gams (2017) and Vu et al. (2019). The genus is characterized by brightly or lightly coloured, perithecial ascomata in a concolorous subiculum, cylindrical asci with a thickened apex and, fusiform, aseptate or 1-septate, usually warted ascospores with well- developed apiculus at both ends (Põldmaa et al. 2000, Rossman & Seifert 2011). Asexual morphs are mainly cladobotryum-like, while several other asexual morphs are reported for the genus (i.e. acremonium-, dactylaria-, mycogone-, papulaspora-, sepedonium-, stephanoma-, trichothecium- and verticillium-like) (Rogerson & Samuels 1993, 1994, Rossman et al. 1999, 2013, Rossman 2000, Wijayawardene et al. 2017b).