Polystromomyces araneae a fungus on a spider egg sac (BBH 49054) b fertile heads c perithecia d asci e ascus tip f part-spores g, h colonies on OA at 21 days (g obverse, h reverse) i conidium formation from a hypha on OA j microcycle conidiation on OA k, l colonies on PDA at 21 days (k obverse, l reverse) m conidia formation from a hypha on PDA n microcycle conidiation on PDA. Scale bars: 10 mm (a); 3 mm (b); 200 µm (c, d); 10 µm (e, f, i, j, m, n).