Type species: Didymia simplex Busk, 1852
This genus includes the species:
| Didymozoum simplex | (Busk, 1852) | Recent | Australia, New Zealand |
| Didymozoum marginatum | Harmer, 1927) | Recent | Indo-Pacific |
| Didymozoum triseriale | (Philipps, 1899) | Recent | Indo-Pacific |
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Didymozoum simplex |
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