Olympio Oliveira Ribeiro da Fonseca

Piedraia hortae is a superficial fungus that exists in the soils of tropical and subtropical environments and affects both sexes of all ages. The fungus grows very slowly, forming dark hyphae, which contain chlamydoconidia cells and black colonies when grown on agar. Piedraia hortae is a dermatophyte and causes a superficial fungal infection known as black piedra, which causes the formation of black nodules on the hair shaft and leads to progressive weakening of the hair. The infection usually infects hairs on the scalp and beard, but other varieties tend to grow on pubic hairs. The infection

Piedraia is a genus of fungus within the Piedraiaceae family in the Capnodiales order. There are 2 known species (according to Species Fungorum); Piedraia hortae Fonseca & Leão (1928) Piedraia quintanilhae Uden, Barros-Mach. & Cast.-Branco (1963) Former species; P. hortae var. paraguayensis Fonseca & Leão (2014) = Piedraia hortae P. javanica Boedijn & Verbunt (1938) = Piedraia hortae P. malayi R. Green & Mankikar (1950) = Piedraia hortae P. sarmentoi M.J. Pereira (1930) = Piedraia hortae P. surinamensis C.W. Dodge (1935) = Piedraia hortae P. venezuelensis Brumpt & Langeron (1934) = Piedraia

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