Oomyces Berk. & Broome, Ann. Mag. nat. Hist., Ser. 2 7: 185 (1851).
Index Fungorum number: IF 3578; Facesoffungi number: FoF 06488, 7 morphological species (Species Fungorum 2022), no molecular data available.
Saprobic on host. Sexual morph: Scattered, shining, pale flesh-colored, conical, truncate above, and marked with ostiole. Perithecia vertical, closely packed in common tough receptacle. Asci elongated, cylindrical. Ascospores filiform, extremely long, flexuous. Asexual morph: Unknown (adapted from Berkley and Broome 1851).
Type species: Oomyces carneoalbus (Lib.) Berk. & Broome
Notes: Oomyces is characterised by scattered, shining conical perithecia, elongated asci and filiform ascospores. Oomyces resembles Acrospermum but differs in the structure and is easily mistaken for the egg of an insect such as Crioceris. The structure of Oomyces is not easily noticeable until a section is made as the perithecia appear as dimple in a truncate apex. Oomyces is a distinct genus in Acrospermaceae but molecular data is lacking. Fresh collections and DNA sequence data are needed to confirm the taxonomic placement of Oomyces.
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