Two new species of Chaetomidium (Sordariales)

Two new species of Chaetomidium, C. galaicum isolated from a granite rock sample collected in Galicia (Spain), and C. triangulare isolated from a soil sample collected on Salta province (Argentina), are described and illustrated. The former species has a cephalothecoid ascomatal wall with flexuous hairs, subglobose to broadly fusiform asci, and large fusiform ascospores, with a terminal germ pore. Chaetomidium triangulare is characterised by non-cephalothecoid, glabrous ascomata, clavate asci and triangular ascospores in upper view, with a terminal germ pore surrounded by a dark area. A key for the accepted species of Chaetomidium is provided.