Dimerium
Dimerium (Sacc. & P. Syd.) McAlpine, Proc. Linn. Soc. N.S.W. 28: 98 (1903).
≡ Dimerosporium subgen. Dimerium Sacc. & P. Syd., Syll. fung. (Abellini) 16: 410 (1902).
Index Fungorum number: IF 25887; Facesoffungi number: FoF 06391, 72 morphological species (Species Fungorum 2022), no molecular data available.
Parasitic on living leaves, colonies dark brown, mycelium superficial, dark brown, amphigenous. Sexual morph: Ascomata superficial, subglobose, with hyphal appendages, flexuous, cylindrical, septate, dark brown, roughened. Asci 8-spored, bitunicate, fissitunicate, saccate-oblong to ellipsoidal, apically thickened. Ascospores conglobate, ellipsoid-fusiform to subclavate, ends rounded, uniseptate, constricted at the septa and dark pigmented, upper cell wider than lower cell, septum supramedian, olivaceous brown to brown. Asexual morph: hyphomycetous, Heterosporiopsis sp. Colonies large, superficial, epiphyllous, dark brown, with numerous mycelia, brown to darkly brown hyphae, scattered, with brown to dark brown hyphopodia-like structures. Conidia formed on superficial hyphae, irregular, subglobose to elongate ellipsoidal, basal cell wider, multi-septate, dark brown, rough-walled (adapted from Boonmee et al. 2017).
Type species: Dimerium olivaceum Syd. & P. Syd.
Notes: Dimerium was introduced by Saccardo and Sydow (1902) as a subgenus of Dimerosporium. Dimerium olivaceum was assigned as the type species by Boonmee et al. (2017). Its members are characterised by solitary, superficial ascomata with hyphal appendages anduniseptate ellipsoidal, dark brown ascospores darkly pigmented at the septum. Molecular data is lacking. Fresh collections with DNA sequence data are needed to confirm the systematic position of Dimerium.
Recent News
Recent paper to be publishedRecent Genus
NothocladosporiumPhillipsiella
Curreya
Recent Species
Nothocladosporium syzygiiPhillipsiella atra
Curreya conorum
