IRMNG Taxon list
- Orchistoma agariciforme Keller, 1884
- Orchistoma collapsa Mayer, 1900
- Orchistoma collapsum (Mayer, 1900)
- Orchistoma manam Bouillon, 1984
- Orchistoma mauropoda Gershwin, Zeidler & Davie, 2010
- Orchistoma nubiae Bouillon, 1984
- Orchistoma pileus (Lesson, 1843)
- Orchistoma steenstrupii Haeckel, 1879 accepted as Orchistoma pileus (Lesson, 1843)
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