| Nominal Species (n = 56) | Present allocation (n = 50) | Ref. |
|---|---|---|
| Echinopsolus acanthocola Gutt, 1990 | Echinopsolus acanthocola | 356 |
| Psolus antarcticus Philippi, 1857 | Psolus antarcticus | 356 |
| Lissothuria antillensis Pawson, 1967 | Lissothuria antillensis | 485 |
| Psolus arnaudi Cherbonnier, 1974 | Psolus arnaudi | 3477 |
| Thyonepsolus beebei Deichman, 1937 | Lissothuria ornata | 3477 |
| Psolidium bidiscum Lampert, 1896 | Psolidium bidiscum | 523 |
| Psolus boholensis Semper, 1868 | Psolus boholensis | 81020 |
| Psolus braziliensis Théel, 1886 | Lissothuria braziliensis | 75097 |
| Psolidium bullatum Oshima, 1915 | Psolidium bullatum | 19 |
| Psolus californicus Fisher, 1905 | Psolus chitinoides | 75097 |
| Psolus charcoti Vaney, 1906 | Psolus charcoti | 3118 |
| Psolus cherbonnieri Carriol & Féral, 1985 | Psolus cherbonnieri | 87422 |
| Psolus chitinoides Clark, 1901 | Psolus chitinoides | 19 |
| Psolidium complanatum Cherbonnier, 1969 | Psolidium complanatum | 356 |
| Psolus complanatus Semper, 1868 | Psolus complanatus | 81020 |
| Psolus diomedeae Ludwig, 1893 | Psolus diomedeae | 3477 |
| Psolus disciformis Théel, 1886 | Psolidium disciformis | 3477 |
| Psolidium dorsipes Ludwig | Psolidium dorsipes | 19 |
| Psolus dubiosus Ludwig & Heding, 1935 | Psolus dubiosus | 356 |
| Cucumaria ekmani Ludwig & Heding, 1935 | Neopsolidium kerguelensis | 3477 |
| Psolidium ekmani Deichmann, 1941 | Psolidium ekmani | 485 |
| Psolus ephippifer Thompson, 1876 | Psolus ephippifer | 485 |
| Psolidium eubullatum Deichmann, 1941 | Psolidium eubullatum | 485 |
| Psolus fabricii Düben & Koren, 1846 | Psolus fabricii | 19 |
| Psolidium gaini Vaney, 1914 | Psolidium gaini | 3118 |
| Psolidium gracile Ludwig, 1894 | Psolidium gracile | 356 |
| Psolus hypsinotus Heding, 1942 | Psolus hypsinotus | 356 |
| Psolus incertus Théel, 1886 | Psolidium poriferum | 3477 |
| Psolus japonicus Östergren, 1898 | Psolus japonicus | 19 |
| Cucumaria kerguelensis Théel, 1886 | Neopsolidium kerguelensis | 485 |
| Psolidium kharlamenkoi Panina, Stepanov & Martynov, 2021 | Psolidium kharlamenkoi | 3477 |
| Psolus koehleri Vaney, 1914 | Psolus koehleri | 87422 |
| Pseudopsolus macquariensis Dendy | Pseudopsolus macquariensis | 356 |
| Psolus macrolepis Fisher, 1907 | Psolus macrolepis | 473 |
| Psolus marcusi Tommasi, 1971 | Psolus marcusi | 479 |
| Psolus neozolanicus Mortensen, 1925 | Psolus neozolanicus | 88950 |
| Psolidium normani O'Loughlin & Ahearn, 2008 | Psolidium normani | 87422 |
| Lissothuria ornata Verrill, 1867 | Lissothuria ornata | 3477 |
| Psolidium ornatum Perrier, 1893 | Psolidium ornatum | 485 |
| Psolidium panamense Ludwig, 1894 | Psolidium panamense | 356 |
| Psolus paradubiosus Carriol & Féral, 1985 | Psolus paradubiosus | 485 |
| Psolus parvulus Cherbonnier, 1974 | Psolus parvulus | 3477 |
| Psolus pauper Ludwig, 1894 | Psolus squamatus | 75097 |
| Psolidium pawsoni O'Loughlin & Ahearn, 2008 | Psolidium pawsoni | 87422 |
| Psolus peronii Bell, 1883 | Psolus peronii | 3477 |
| Psolidium planum Deichmann, 1941 | Psolidium planum | 356 |
| Cuvieria porifera Studer, 1876 | Psolidium poriferum | 3477 |
| Psolus pourtalesii Théel, 1886 | Psolus pourtalesii | 356 |
| Psolidium schnabelae O'Loughlin & Ahearn, 2008 | Psolidium schnabelae | 87422 |
| Psolus segregatus Perrier, 1905 | Psolus segregatus | 3477 |
| Psolus solidus Massin, 1987 | Psolus solidus | 356 |
| Psolus squamatus segregatus Perrier, 1905 | Psolus squamatus | 87801 |
| Psolus squamatus var. segregatus Perrier, 1905 | Psolus squamatus | 3477 |
| Psolidium tenue Mortensen, 1925 | Psolidium tenue | 87422 |
| Psolus tessellatus Koehler, 1896 | Psolus tessellatus | 3477 |
| Psolus vitoriae Tommasi, 1971 | Psolus vitoriae | 479 |