| Nominal Species (n = 155) | Present allocation (n = 137) | Ref. |
|---|---|---|
| Cucumaria abyssorum Théel, 1886 | Abyssocucumis abyssorum | 108 |
| Cucumaria acuta Massin, 1992 | Cucumaria acuta | 87422 |
| Botryodactyla affinis Ayres, 1851 | Cucumaria frondosa | 485 |
| Pawsonellus africanus Thandar, 1986 | Pawsonellus africanus | 356 |
| Abyssocucumis albatrossi Cherbonnier, 1947 | Abyssocucumis albatrossi | 19 |
| Cucumaria alcocki Koehler & Vaney, 1908 | Cucumaria alcocki | 356 |
| Psolidocnus amokurae Mortensen, 1925 | Psolidocnus amokurae | 485 |
| Loisettea amphictena Rowe & Pawson, 1985 | Loisettea amphictena | 485 |
| Pentacta anceps Selenka, 1867 | Pentacta anceps | 356 |
| Cucumaria anivaensis Levin, 2004 | Cucumaria anivaensis | 356 |
| Cucumaria antarctica Vaney, 1906 | Heterocucumis steineni | 3477 |
| Pentacta arae Boone, 1938 | Pseudocolochirus violaceus | 3477 |
| Cucumaria attenuata Vaney, 1906 | Cucumaria georgiana | 3477 |
| Colochirus axiologus Clark, 1914 | Pseudocolochirus violaceus | 3477 |
| Cucumaria bacilliformis Koehler & Vaney, 1908 | Cucumaria bacilliformis | 356 |
| Trachythyone baja Hernandez, 1987 | Trachythyone baja | 356 |
| Neothyone belli Ludwig, 1887 | Pseudothyone belli | 75097 |
| Pseudocolochirus bicolor Cherbonnier, 1970 | Pseudocolochirus violaceus | 3477 |
| Neocucumella bicolumnata Dendy & Hindle, 1907 | Neocucumella bicolumnata | 485 |
| Panningia bispicula Cherbonnier, 1964 | Panningia bispicula | 485 |
| Psolidium bistriatum Ludwig & Heding, 1935 | Psolicrux coatsi | 3477 |
| Sphaerothuria bitentaculata Ludwig, 1893 | Sphaerothuria bitentaculata | 19 |
| Cucumaria bollonsi Mortensen, 1925 | Psolidiella nigra | 3477 |
| Squamocnus brevidentis Hutton, 1878 | Squamocnus brevidentis | 485 |
| Cucumaria brunnea Forbes | Cucumaria brunnea | 485 |
| Cucumaria californica Semper | Cucumaria californica | 19 |
| Paracucumaria capense Thandar, 1998 | Paracucumaria capense | 485 |
| Actinocucumis chinensis Liao & Pawson, 2001 | Actinocucumis chinensis | 485 |
| Caespitugo citriformis Gutt, 1990 | Caespitugo citriformis | 356 |
| Cucumaria coatsi Vaney, 1908 | Psolicrux coatsi | 3477 |
| Thyonidium commune Forbes, 1853 | Duasmodactyla commune | 75097 |
| Cucumaria conicospermum Levin & Stepanov, 2002 | Cucumaria conicospermum | 485 |
| Cucumaria craceoida Vaney, 1908 | Cladodactyla crocea | 3477 |
| Trachythyone crassipeda Cherbonnier, 1961 | Trachythyone crassipeda | 85 |
| Colochirus crassus Ekman, 1918 | Colochirus crassus | 81020 |
| Cladodactyla crocea Lesson | Cladodactyla crocea | 485 |
| Cucumaria crucifera Semper, 1868 | Trachasina crucifera | 485 |
| Cucumaria curata Cowles, 1907 | Cucumaria curata | 19 |
| Trachythyone cynthiae O'Loughlin, 2009 | Trachythyone cynthiae | 87422 |
| Actinocucumis difficilis Bell, 1884 | Actinocucumis typica | 485 |
| Plesiocolochirus dispar Lampert, 1889 | Plesiocolochirus dispar | 485 |
| Caespitugo diversipes Gutt, 1990 | Cucamba psolidiformis | 3477 |
| Cucumaria djakonovi Baranova, 1980 | Cucumaria djakonovi | 485 |
| Cucumaria dubiosa Semper, 1868 | Pseudocnus dubiosus | 3477 |
| Pseudocnus dubiosus koellikeri Panning, 1962 | Ocnus koellikeri | 3477 |
| Cucumaria dudexa O'Loughlin & Manjón-Cabeza, 2009 | Cucumaria dudexa | 3477 |
| Cucumaria echinata von Marenzeller, 1882 | Pseudocnus echinatus | 3477 |
| Cucumaria elongata Düben & Koren, 1846 | Paraleptopentacta elongata | 3477 |
| Cucumaria fallax Ludwig, 1894 | Cucumaria fallax | 19 |
| Trachythyone fallax Cherbonnier, 1958 | Trachythyone fallax | 485 |
| Cucumaria farquhari Mortensen, 1925 | Psolidocnus farquhari | 3477 |
| Psolidocnus farquhari Mortensen, 1925 | Psolidocnus farquhari | 485 |
| Cucumaria fisheri Wells, 1924 | Cucumaria fisheri | 19 |
| Cucumaria flamma Solis & Laguarda, 1999 | Cucumaria flamma | 485 |
| Cucumaria frauenfeldi Théel, 1882 | Cucumaria frauenfeldi | 485 |
| Holothuria fusiformis Forbes & Goodsir, 1839 | Paraleptopentacta elongata | 3477 |
| Cucumaria georgiana Lampert, 1886 | Cucumaria georgiana | 485 |
| Cucumaria glacialis Ljungman, 1879 | Ocnus glacialis | 3477 |
| Cucumaria godfroyi Vaney, 1914 | Heterocucumis steineni | 3477 |
| Hemioedema goreensis Cherbonnier, 1949 | Hemioedema goreensis | 485 |
| Botryodactyla grandis Ayres, 1851 | Cucumaria frondosa | 485 |
| Leptopentacta grisea Clark, 1938 | Leptopentacta grisea | 3477 |
| Cucumaria grubei von Marenzeller, 1874 | Cucumaria grubei | 356 |
| Pseudocnus grubei Panning, 1949 | Ocnus grubei | 19 |
| Hemioedema gruveli Hérouard, 1929 | Hemioedema gruveli | 485 |
| Psolidiella hickmani O'Loughlin, 2000 | Psolidiella hickmani | 485 |
| Eupyrgus hispidus Barrett, 1857 | Echinocucumis hispida | 3477 |
| Cucumaria hyndmanni Thompson,1840 | Panningia hyndmanni | 485 |
| Paracucumaria hyndmanni Thompson,1840 | Paracucumaria hyndmanni | 485 |
| Plesiocolochirus ignavus Ludwig, 1874 | Plesiocolochirus ignavus | 485 |
| Cucumaria improvisa Ludwig, 1875 | Cucumaria improvisa | 485 |
| Stereoderma incerta Cherbonnier, 1969 | Stereoderma incerta | 356 |
| Neocnus incubans Cherbonnier, 1972 | Neocnus incubans | 356 |
| Cucumella indonesia Massin, 1987 | Cucumella indonesia | 567 |
| Colochirus inornatus von Marenzeller, 1881 | Pentacta inornatus | 85042 |
| Cucumaria insolens Théel, 1886 | Cucumaria insolens | 485 |
| Psolicrux iuvenilesi O'Loughlin & Manjón-Cabeza, 2009 | Psolicrux iuvenilesi | 87422 |
| Cucumaria japonica Semper, 1868 | Cucumaria japonica | 19 |
| Cucumaria kirchsbergii Heller, 1868 | Stereoderma kirchsbergii | 3477 |
| Echinocucumis kirrilyae O'Loughlin, 2009 | Echinocucumis kirrilyae | 87422 |
| Cucumaria koellikeri Semper, 1868 | Ocnus koellikeri | 524 |
| Cucumaria laevigata Verrill | Cucumaria laevigata | 485 |
| Pentactella laevigata Verrill, 1876 | Pseudocnus laevigatus | 3477 |
| Cucumaria lamberti Levin & Gudimova, 1998 | Cucumaria lamberti | 485 |
| Thyone lechleri Lampert, 1885 | Trachythyone lechleri | 3477 |
| Cucumaria leoninoides Mortensen, 1925 | Pseudocnus leoninoides | 88950 |
| Cucumaria levini Stepanov & Pil'ganchuk, 2002 | Cucumaria levini | 485 |
| Cucumaria lubrica Clark, 1901 | Cucumaria lubrica | 19 |
| Pseudocnus lubricus Clark, 1901 | Pseudocnus lubricus | 490 |
| Squamocnus luteus O'Loughlin & Alcock, 2000 | Squamocnus luteus | 485 |
| Trachythyone mackenzieae O'Loughlin, 2009 | Trachythyone mackenzieae | 87422 |
| Trachythyone macphersonae Pawson, 1962 | Trachythyone macphersonae | 87422 |
| Psolidiella maculosa O'Loughlin, 2000 | Psolidiella maculosa | 485 |
| Cucumaria manoelina Tommasi, 1971 | Cucumaria manoelina | 479 |
| Panningia mauritanica Hérouard, 1929 | Panningia mauritanica | 356 |
| Trachythyone mira Ludwig & Heding, 1935 | Trachythyone mira | 485 |
| Amphicyclus mortenseni Heding & Panning, 1954 | Amphicyclus mortenseni | 87422 |
| Trachythyone muricata Studer, 1876 | Trachythyone muricata | 3477 |
| Psolidium navicula Ekman, 1927 | Psolicrux coatsi | 3118 |
| Psolidiella nigra Mortensen, 1925 | Psolidiella nigra | 485 |
| Squamocnus niveus O'Loughlin & Alcock, 2000 | Squamocnus niveus | 485 |
| Cucumaria okhotensis Levin, 2003 | Cucumaria okhotensis | 485 |
| Echinopsolus onekotanensis Panina, Stepanov, Smirnov & Martynov, 2020 | Echinopsolus onekotanensis | 3477 |
| Cucumaria pallida Lambert & Kirkendale, 1995 | Cucumaria pallida | 485 |
| Cucumaria paraglacialis Lambert & Kirkendale, 1995 | Cucumaria paraglacialis | 356 |
| Trachythyone parva Ludwig, 1875 | Trachythyone parva | 485 |
| Pseudocnus pawsoni Won & Rho, 1998 | Pseudocnus pawsoni | 485 |
| Pentacta peterseni Ancona-Lopez, 1965 | Pentacta peterseni | 479 |
| Pseudocnus piperata Stimpson, 1864 | Cucumaria piperata | 75097 |
| Trachycucumis plettenbergi Thandar & Moodley, 2003 | Trachycucumis plettenbergi | 757 |
| Cucumaria pseudocurata Deichmann, 1938 | Cucumaria pseudocurata | 19 |
| Pentamera pulcherrima Ayres, 1854 | Cucumaria pulcherrima | 75097 |
| Leptopentacta punctabipeda Cherbonnier, 1960 | Leptopentacta punctabipeda | 81020 |
| Colochirus pygmaea Théel, 1886 | Pentacta pygmaea | 75097 |
| Colochirus quadrangularis Troschel, 1846 | Colochirus quadrangularis | 485 |
| Pentacta quadrangularis Lesson, 1830 | Pentacta quadrangularis | 567 |
| Thyone recurvata Théel, 1886 | Trachythyone muricata | 3477 |
| Colochirus robustus Oestergren, 1898 | Colochirus robustus | 81020 |
| Staurothyrone rosacea Semper, 1868 | Staurothyrone rosacea | 485 |
| Ocnus sacculus Pawson, 1983 | Ocnus sacculus | 485 |
| Psolidocnus sacculus Pawson, 1983 | Psolidocnus sacculus | 485 |
| Echinopsolus sanamyanorum Panina, Stepanov, Smirnov & Martynov, 2020 | Echinopsolus sanamyanorum | 3477 |
| Cucumaria savelijevae Baranova, 1980 | Cucumaria savelijevae | 485 |
| Cucumaria saxicola Brady & Robertson, 1871 | Cucumaria saxicola | 485 |
| Cladodactyla senegalensis Panning, 1940 | Cladodactyla senegalensis | 485 |
| Pseudocnus sentus O'Loughlin & Alcock, 2000 | Pseudocnus sentus | 485 |
| Cucumaria serrata Hérouard, 1896 | Cucumaria serrata | 485 |
| Cucumaria serrata var. marionensis Théel, 1886 | Pseudocnus marionensis | 3477 |
| Cucumaria sinorbis Cherbonnier, 1952 | Cucumaria sinorbis | 485 |
| Cucumaria sluiteri Ohshima, 1915 | Abyssocucumis abyssorum | 105 |
| Microchoerus splendidus Gutt, 1990 | Microchoerus splendidus | 485 |
| Cucumaria steineni Ludwig, 1898 | Heterocucumis steineni | 3477 |
| Ekmocucumis steineni Ludwig | Ekmocucumis steineni | 485 |
| Cucumaria stephensoni John, 1939 | Roweia stephensoni | 485 |
| Ocnus surinamensis Semper, 1868 | Ocnus surinamensis | 446 |
| Parathyone surinamensis Semper | Parathyone surinamensis | 485 |
| Thyonella surinamensis Semper, 1868 | Thyonella surinamensis | 479 |
| Cucumaria sykion Lampert, 1885 | Cucumaria sykion | 485 |
| Cucumaria syracusana Grube,1840 | Cucumaria syracusana | 485 |
| Ocnus syracusanus Grube, 1840 | Ocnus syracusanus | 356 |
| Echinocucumis tenera Cherbonnier, 1958 | Echinocucumis tenera | 485 |
| Cucumaria tergestina Sars, 1857 | Cucumaria tergestina | 485 |
| Leptopentacta tergestina Sars, 1857 | Leptopentacta tergestina | 356 |
| Pentacta tessellara Cherbonnier, 1970 | Pentacta tessellara | 356 |
| Cucumaria tetracentriophora Heding, 1938 | Cucumaria tetracentriophora | 485 |
| Cucumaria tricolor Sluiter, 1901 | Pseudocolochirus violaceus | 3477 |
| Cucumella triplex Ludwig & Heding, 1935 | Cucumella triplex | 485 |
| Cucumaria turqueti Vaney, 1906 | Staurocucumis turqueti | 87730 |
| Duasmodactyla turriculacava Massin, 1987 | Duasmodactyla turriculacava | 567 |
| Actinocucumis typica Ludwig, 1875 | Actinocucumis typica | 3477 |
| Actinocumis typicus Ludwig, 1875 | Actinocumis typicus | 81020 |
| Cucumaria vaneyi Cherbonnier, 1949 | Cucumaria vaneyi | 3477 |
| Cucumaria vegae Théel, 1886 | Cucumaria vegae | 19 |
| Colochirus violaceus Théel, 1886 | Pseudocolochirus violaceus | 3477 |
| Cucumaria webbi Thandar, 1977 | Cucumaria webbi | 485 |