Hymenosoma (crown crabs) is a genus of crabs, containing the following species:
- Hymenosoma crosnieri <small>Naruse & Guinot, 2023</small>
- Hymenosoma depressum <small>Hombron & Jacquinot, 1846</small>
- Hymenosoma gaudichaudii <small>Guérin, 1831</small>
- Hymenosoma geometricum <small>Stimpson, 1858</small>
- Hymenosoma hodgkini <small>Lucas, 1980</small>
- Hymenosoma longicrure <small>Dawson & Griffiths, 2012</small>
- Hymenosoma lurio <small>Poore, Jaime & Teske, 2025</small>
- Hymenosoma orbiculare <small>Desmarest, 1823</small>
- Hymenosoma projectum <small>Dawson & Griffiths, 2012</small>
- Hymenosoma trilobatum <small>Dawson & Griffiths, 2012</small>
The majority of the species are found around southern Africa; the Australasian species H. depressum, H. gaudichaudii and H. hodgkini may be better placed in other genera.
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