Mitosporic fungus. Hyphomycetes. Teleomorph (sexual state): Apiospora (Ascomycete).
Approx. 20 species.
Soil, decomposing plant material.
Arthrinium is cellulolytic, but it is rarely reported.
One species, Arthrinium sphaerospermum, reported as an allergen.
Grows well on general fungal media. White, floccose, spreading. Develops brown to black spore clusters with time.
Small, round brown spores. An equatorial germ slit may be seen with skill. Because spores land in "face" view on spore trap slides this slit is not as obvious as when spores are viewed from a culture.
Distinctive and identifiable on tape lift samples.