| In aspergillus, the threads are simple and erect, with a globose head, around which are clustered chains of simple spores. |
| These cells are generally globose and larger than epidermal cells, and contain many large globules of oil, a consistent feature of all sections examined. |
| Sporangia globose or ovoid to ellipsoid or oblong, erect or sometimes inclined or even nodding. |
| Usually globose in shape or a little lobed, with black peridium and pyramidal warts with apparent cross stripes. |
| The spores are more or less globose, and rough or echinulate, at least in many species. |
| Frustules globose, ellipsoidal or cylindrical, concatenate, closely joined together. |
