Zygosporium
Zygosporium Mont., Annls Sci. Nat., Bot., sér. 2 17: 120 (1842)
Xylariomycetidae, Xylariales, Zygosporiaceae, Zygosporium
Index Fungorum number: IF 10473; Facesoffungi number: FoF 06496; 21 morphological species (Species Fungorum 2020); 8 species with sequence data.
Mainly saprobic on plant substrates. Asexual morph: hyphomycetous. Colonies effuse, white to pale pink. Mycelium immersed or partly superficial, made up of smooth, thin-walled, white or light pink hyphae. Setae/setiform conidiophores with a sphaerical apex. Conidiophores pale brown, macronematous, mononematous, thin-walled, unbranched, septate, smooth, solitary or in small groups, bearing swollen dark brown, thick-walled vesicles on the base. Conidiogenous cells usually on the base of conidiophores, originating on the apex of thick-walled dark vesicles, holoblastic, smooth, thin-walled, discrete, sphaerical to ellipsoid, borne in groups of 2–4 on the vesicular cell. Conidia solitary, globose or ellipsoid, hyaline or pale brown, aseptate, smooth to minutely verruculose or verruculose, thin- or thick-walled. Sexual morph: undetermined (adapted from Li et al., 2017).
Type species: Zygosporium oscheoides Mont., Annls Sci. Nat., Bot., sér. 2 17: 121 (1842)
Notes: Zygosporium was introduced by Montagne (1842) with Z. oscheoides as the type species. Species are usually saprobes in temperate to tropical regions (Photita et al. 2001, Whitton et al. 2003, Manoharachary et al. 2006, McKenzie et al. 2007, Abbas et al. 2011, Pratibha et al. 2012, Taheriyan et al. 2014). Taxa are hyphomycetous (asexual morphs) with darkly pigmented colonies, incurved vesicular cells and globose or ellipsoid and smooth-walled or variously ornamented conidia (Mason 1941, Hughes 1951). Sequence data are available only for Z. chartarum, Z. echinosporum, Z. gibbum, Z. masonii, Z. minus, Z. mycophilum, Z. oscheoides and Z. pseudogibbum. In this entry a new collection of Z. masonii from Dracaena is illustrated (notes from Hyde et al. 2020).
Species illustrated in this entry:
Zygosporium masonii S. Hughes
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