Ophiostoma Syd. & P. Syd., Annls mycol. 17(1): 43 (1919)

Index Fungorum number: IF3614; 134 morphological species (de Beer et al. 2013), 62 species with sequence data.

Type species Ophiostoma piliferum (Fr.) Sydow & P. Sydow

Notes de Beer et al. (2013a) accepted 134 species in Ophiostoma and some species are important tree pathogens, such as O. ulmi and O. novoulmi, the causal agents of Dutch elm disease, transmitted by elm bark beetles (Webber & Gibbs 1989, Brasier 1991). The sexual morph is characterized by globose to subglobose ascomata, surrounded by external hairs, with ostiolar necks and some species containing divergent, ostiolar hyphae. The asexual morph has sporothrixlike or pesotumlike conidiogenous cells with ellipsoidal to cylindrical obovate, globose and aseptate conidia.


  • Ophiostoma piliferum