| Nominal Species (n = 15) | Present allocation (n = 7) | Ref. |
|---|---|---|
| Iotrochota acanthostylifera Stephens, 1916 | Iotrochota acanthostylifera | 19 |
| Iotrochota acerata Dendy, 1896 | Iotrochota acerata | 3477 |
| Iotrochota arenosa Rützler, Maldonado, Piantoni & Riesgo, 2007 | Iotrochota arenosa | 81807 |
| Iotrochota baculifera Ridley, 1884 | Iotrochota baculifera | 81807 |
| Iotrochota baculifera var. flabellata Dendy, 1887 | Iotrochota baculifera | 81807 |
| Iotrochota baculifera var. minor Hentschel, 1911 | Iotrochota baculifera | 81807 |
| Iotrochota baculifera var. tumescens Kirkpatrick, 1900 | Iotrochota baculifera | 81807 |
| Halichondria birotulata Higgin, 1876 | Iotrochota birotulata | 81807 |
| Iotrochota bistylata Boury-Esnault, 1973 | Iotrochota birotulata | 75097 |
| Hiattrochota ditrochota de Laubenfels, 1954 | Iotrochota baculifera | 81807 |
| Hiattrochota hiatti de Laubenfels, 1954 | Iotrochota baculifera | 81807 |
| Iotrochota intermedia Lundbeck, 1905 | Iotrochota intermedia | 3477 |
| Hyrtios musciformis Duchassaing & Michelotti, 1864 | Iotrochota birotulata | 81807 |
| Hiattrochota mystile de Laubenfels, 1954 | Iotrochota baculifera | 81807 |
| Hiattrochota protea de Laubenfels, 1950 | Iotrochota protea | 3477 |