Oomyces Berk. & Broome, Ann. Mag. nat. Hist., Ser. 2 7: 185 (1851).
MycoBank number: MB 3578; Index Fungorum number: IF 3578; Facesoffungi number: FoF 06488; 7 morphological species (Species Fungorum 2020), molecular data unavailable.
Type species: Oomyces carneoalbus (Lib.) Berk. & Broome, Ann. Mag. Nat. Hist., Ser. 2 7: 185 (1851).
≡ Sphaeria carneoalba Lib., Pl. crypt. Arduenna, fasc. (Liège) 3(nos 201–300): no. 241 (1834).
Notes: Oomyces (= Coscinaria Ellis & Everh. 1886 fide Species Fungorum 2017) was introduced by Berk and Broome (1851), with O. carneoalbus as the type species. The genus is characterized by conoid, yellowish white, multi-locular stromata and lacks pseudoparaphyses (Eriksson 1981). Oomyces was described as similar to the egg of some insects, such as Crioceris, because its perithecia are visible as little dimples in the truncate apex of the fruiting body.