Thysanus may refer to:
- Thysanus, a genus of wasps in the family Signiphoridae described in 1840
- Thysanus, a genus of flowering plants in the family Connaraceae; synonym of Cnestis
- Thysanus, a genus of cnidarians in the family Faviidae; unknown status, described in 1863 by Duncan, a junior homonym
This disambiguation page lists articles about distinct genera with the same name.
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