| Cosmarium margaritiferum MENG. |  | | |
| | Cosmarium meneghinii BREB. ex RALFS |  | | |
| | Cosmarium microsphinctum NORDSTEDT |  | | |
|
| Cosmarium moniliforme (TURP.) ex RALFS |  | | |
| | Cosmarium nasutum NORDST. |  | | |
| | Cosmarium norimbergense REINSCH |  | | |
|
| Cosmarium norimbergense var. depressum (W. & G.S. WEST) KRIEG. & GERLOFF |  | | |
| | Cosmarium notabile BREB. var. transiens INSAM & KRIEGER |  | | |
| | Cosmarium novae-semliae WILLE |  | | |
|
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