| Nominal Species (n = 537) | Present allocation (n = 536) | Ref. |
|---|---|---|
| Cymodoce acanthiger Barnard, 1914 | Cymodoce acanthiger | 19 |
| Cymodoce aculeata Haswell, 1881 | Cymodoce aculeata | 19 |
| Cymodoce acuta Richardson, 1904 | Cymodoce acuta | 19 |
| Dynamenella acuticauda Menzies, 1962 | Dynamenella acuticauda | 19 |
| Cassidinopsis admirabilis Hurley & Jansen, 1977 | Cassidinopsis admirabilis | 19 |
| Syncassidina aestuaria Baker, 1928 | Syncassidina aestuaria | 19 |
| Cassidias africana Barnard, 1920 | Cassidias africana | 19 |
| Cymodoce africana Barnard, 1914 | Cymodoce africana | 19 |
| Exosphaeroma agmokara Bruce, 2003 | Exosphaeroma agmokara | 3113 |
| Gnorimosphaeroma akanense Nunomura, 1998 | Gnorimosphaeroma akanense | 3113 |
| Cassidinella akania Bruce, 1994 | Cassidinella akania | 19 |
| Exosphaeroma alba Menzies & Glynn, 1968 | Exosphaeroma alba | 19 |
| Cymodopsis albaniensis Baker, 1926 | Cymodopsis albaniensis | 19 |
| Gnorimosphaeroma albicauda Nunomura, 2005 | Gnorimosphaeroma albicauda | 3113 |
| Cymodoce alia Kensley, 1975 | Cymodoce alia | 19 |
| Exosphaeroma alii Baker, 1926 | Exosphaeroma alii | 19 |
| Cymodoce alis Barnard, 1955 | Cymodoce alis | 19 |
| Cymodoce allegra Hurley & Jansen, 1977 | Cymodoce allegra | 19 |
| Exosphaeroma alveola Bruce, 2003 | Exosphaeroma alveola | 3113 |
| Dynamenella alveolata Schotte & Kensley, 2005 | Dynamenella alveolata | 3781 |
| Sphaeromopsis amathitis Holdich & Jones, 1973 | Sphaeromopsis amathitis | 19 |
| Dynoides amblysinus Pillai, 1954 | Dynoides amblysinus | 8381 |
| Cymodocella ambonata Bruce, 1995 | Cymodocella ambonata | 3113 |
| Makarasphaera amnicosa Bruce, 2005 | Makarasphaera amnicosa | 3113 |
| Paracassidina anasilla Bruce, 1994 | Paracassidina anasilla | 19 |
| Gnorimosphaeroma anchialos Jang & Kwon, 1993 | Gnorimosphaeroma anchialos | 19 |
| Dynamenopsis angolensis Kensley, 1971 | Dynamenopsis angolensis | 19 |
| Dynamene angulata Richardson, 1901 | Dynamene angulata | 19 |
| Amphoroidea angustata Baker, 1908 | Amphoroidea angustata | 19 |
| Cilicaea angustispinata Hurley & Jansen, 1977 | Cilicaea angustispinata | 19 |
| Cymodocella ankylosauria Bruce, 1995 | Cymodocella ankylosauria | 3113 |
| Sphaeroma annandalei Stebbing, 1911 | Sphaeroma annandalei | 19 |
| Exosphaeroma antarctica Richardson, 1908 | Exosphaeroma antarctica | 19 |
| Cilicaea antennalis Miers, 1884 | Cilicaea antennalis | 19 |
| Exosphaeroma antikraussi Barnard, 1940 | Exosphaeroma antikraussi | 19 |
| Exosphaeroma antillense Richardson, 1912 | Exosphaeroma antillense | 19 |
| Exosphaeroma aphrodita Boone, 1923 | Exosphaeroma aphrodita | 19 |
| Cassidias argentinea Richardson, 1906 | Cassidias argentinea | 19 |
| Benthosphaera arkoola Bruce, 1994 | Benthosphaera arkoola | 3113 |
| Cymodoce armata Milne-Edwards, 1840 | Cymodoce armata | 19 |
| Isocladus armatus Milne-Edwards, 1840 | Isocladus armatus | 19 |
| Dynoides artocanalis Nunomura, 1997 | Dynoides artocanalis | 8381 |
| Paracilicaea asiatica Kussakin, Malyutina & Rostomov, 1990 | Paracilicaea asiatica | 19 |
| Paracilicaea aspera Harrison & Holdich, 1984 | Paracilicaea aspera | 19 |
| Cerceis aspericaudata Miers, 1884 | Cerceis aspericaudata | 19 |
| Amphoroidea australiensis Dana, 1853 | Amphoroidea australiensis | 19 |
| Cassidias australiensis Bruce, 2003 | Cassidias australiensis | 3113 |
| Haswellia australiensis Haswell, 1880 | Haswellia australiensis | 8324 |
| Cymodoce australis Hodgson, 1902 | Cymodoce australis | 19 |
| Oxinasphaera aylostera Bruce, 1997 | Oxinasphaera aylostera | 3113 |
| Isocladus bahamondei Carvacho, 1997 | Isocladus bahamondei | 3113 |
| Paracassidina bakeri Bruce, 1994 | Paracassidina bakeri | 19 |
| Striella balani Glynn, 1968 | Striella balani | 19 |
| Paracassidina bamarook Bruce, 1994 | Paracassidina bamarook | 19 |
| Discidina banawarra Bruce, 1994 | Discidina banawarra | 19 |
| Geocerceis barbarae Menzies & Glynn, 1968 | Geocerceis barbarae | 19 |
| Dynamenella barnardi Menzies & Glynn, 1868 | Dynamenella barnardi | 19 |
| Pseudosphaeroma barnardi Monod, 1931 | Pseudosphaeroma barnardi | 19 |
| Dynoides barnardii Baker, 1928 | Dynoides barnardii | 19 |
| Cymodopsis beageli Brandt, 1998 | Cymodopsis beageli | 3477 |
| Cilicaea beddardi Stebbing, 1905 | Cilicaea beddardi | 19 |
| Paradynamene benjamensis Richardson, 1905 | Paradynamene benjamensis | 19 |
| Cymodoce bentonica Loyola e Silva, 1962 | Cymodoce bentonica | 19 |
| Austrasphaera berentsae Bruce, 2003 | Austrasphaera berentsae | 3113 |
| Cerceis bicarinata Barnard, 1936 | Cerceis bicarinata | 19 |
| Cymodoce bicarinata Stebbing, 1904 | Cymodoce bicarinata | 19 |
| Ischyromene bicarinata Harrison, 1981 | Ischyromene bicarinata | 19 |
| Exosphaeroma bicolor Baker, 1926 | Exosphaeroma bicolor | 19 |
| Pistorius bidens Harrison & Holdich, 1982 | Pistorius bidens | 19 |
| Cerceis bidentata Milne-Edwards, 1840 | Cerceis bidentata | 19 |
| Cymodoce bidentata Haswell, 1882 | Cymodoce bidentata | 19 |
| Cymodoce bifida Leach, 1818 | Cymodoce bifida | 19 |
| Dynamene bifida Torelli, 1930 | Dynamene bifida | 19 |
| Cerceis biforamina Javed & Yousuf, 1996 | Cerceis biforamina | 3113 |
| Sphaeroma bigranulatum Budde-Lund, 1908 | Sphaeroma bigranulatum | 19 |
| Paracassidina bilbie Bruce, 1994 | Paracassidina bilbie | 19 |
| Cymodoce bipapilla Harrison & Holdich, 1984 | Cymodoce bipapilla | 19 |
| Oxinasphaera bisubula Bruce, 1997 | Oxinasphaera bisubula | 3113 |
| Monolistra boldorii Brian, 1931 | Monolistra boldorii | 19 |
| Monolistra bolei Sket, 1960 | Monolistra bolei | 19 |
| Gnorimosphaeroma boninense Nunomura & Satake, 2006 | Gnorimosphaeroma boninense | 3113 |
| Sphaeroma boryi Guerin-Meneville, 1832 | Sphaeroma boryi | 19 |
| Monolistra bosnica Sket, 1970 | Monolistra bosnica | 19 |
| Chitonopsis boyoolie Bruce, 1994 | Chitonopsis boyoolie | 19 |
| Cymodoce brasiliensis Richardson, 1906 | Cymodoce brasiliensis | 19 |
| Dynoides brevicornis Kussakin & Malyutina, 1987 | Dynoides brevicornis | 19 |
| Dynoides brevispina Bruce, 1980 | Dynoides brevispina | 19 |
| Exosphaeroma brevitelson Barnard, 1914 | Exosphaeroma brevitelson | 19 |
| Clianella brucei Harrison & Holdich, 1984 | Clianella brucei | 19 |
| Maricoccus brucei Poore, 1994 | Maricoccus brucei | 19 |
| Oxinasphaera brucei Schotte & Kensley, 2005 | Oxinasphaera brucei | 3781 |
| Paraleptosphaeroma brucei Kussakin & Malyutina, 1993 | Paraleptosphaeroma brucei | 19 |
| Exosphaeroma bruscai Espinoza-Pérez & Hendrickx, 2001 | Exosphaeroma bruscai | 3113 |
| Diclidocellla bullata Bruce, 1995 | Diclidocellla bullata | 3113 |
| Dynamenella bullejiensis Javed & Ahmed, 1988 | Dynamenella bullejiensis | 19 |
| Caecosphaeroma burgundum Dollfus, 1898 | Caecosphaeroma burgundum | 19 |
| Monolistra caeca Gerstaeker, 1856 | Monolistra caeca | 19 |
| Cilicaea calcarifera Harrison & Holdich, 1984 | Cilicaea calcarifera | 19 |
| Pseudosphaeroma callidum Hurley & Jansen, 1977 | Pseudosphaeroma callidum | 19 |
| Monolistra calopyge Sket, 1982 | Monolistra calopyge | 19 |
| Pseudosphaeroma campbellensis Chilton, 1909 | Pseudosphaeroma campbellensis | 19 |
| Dynoides canadensis Khalaji-Pirbalouty & Gagnon, 2021 | Dynoides canadensis | 3477 |
| Cymodocella cancellata Barnard, 1920 | Cymodocella cancellata | 19 |
| Artopoles capensis Barnard, 1955 | Artopoles capensis | 19 |
| Cymodocella capra Hurley & Jansen, 1977 | Cymodocella capra | 19 |
| Cerceis carinata Glynn, 1970 | Cerceis carinata | 19 |
| Dynoides castroi Loyola e Silva, 1960 | Dynoides castroi | 3113 |
| Bilistra cavernicola Sket & Bruce, 2004 | Bilistra cavernicola | 3113 |
| Thermosphaeroma cavicauda Bowman, 1985 | Thermosphaeroma cavicauda | 19 |
| Cymodoce cavicola Barnard, 1920 | Cymodoce cavicola | 19 |
| Paracassidina cervina Bruce, 1994 | Paracassidina cervina | 19 |
| Paraimene charlesae Kensley & Schotte, 1994 | Paraimene charlesae | 19 |
| Haswellia cilicoides Baker, 1908 | Haswellia cilicoides | 3113 |
| Cassidinidea clarkae Schotte & Kensley, 2005 | Cassidinidea clarkae | 3781 |
| Paracilicaea clavus Barnard, 1955 | Paracilicaea clavus | 19 |
| Paracerceis cohenae Kensley, 1984 | Paracerceis cohenae | 19 |
| Xynosphaera colemani Bruce, 1994 | Xynosphaera colemani | 3113 |
| Koremasphaera colonus Bruce, 2003 | Koremasphaera colonus | 3113 |
| Cercosphaera coloura Bruce, 1994 | Cercosphaera coloura | 3113 |
| Cymodoce comans Barnard, 1914 | Cymodoce comans | 19 |
| Dynamenella condita Hurley & Jansen, 1977 | Dynamenella condita | 19 |
| Dynamenella conica Boone, 1923 | Dynamenella conica | 19 |
| Cymodoce convexa Miers, 1876 | Cymodoce convexa | 19 |
| Oxinasphaera copiapoa Bruce, 1997 | Oxinasphaera copiapoa | 3113 |
| Paracilicaea cordylina Kensley, 1984 | Paracilicaea cordylina | 19 |
| Calcipila cornuta Harrison & Holdich, 1984 | Calcipila cornuta | 19 |
| Cymodoce coronata Haswell, 1882 | Cymodoce coronata | 19 |
| Stathmos coronatus Barnard, 1940 | Stathmos coronatus | 19 |
| Cilicaeopsis corpulentis Baker, 1926 | Cilicaeopsis corpulentis | 19 |
| Oxinasphaera corypantha Bruce, 1997 | Oxinasphaera corypantha | 3113 |
| Cilicaea crassa Haswell, 1882 | Cilicaea crassa | 19 |
| Cymodopsis crassa Baker, 1926 | Cymodopsis crassa | 19 |
| Cilicaea crassicaudata Haswell, 1881 | Cilicaea crassicaudata | 19 |
| Dynoides crenulatus Carvacho & Haasmann, 1984 | Dynoides crenulatus | 19 |
| Cymodoce cryptodoma Barnard, 1920 | Cymodoce cryptodoma | 19 |
| Dynamene curalii Holdich & Harrison, 1980 | Dynamene curalii | 19 |
| Cilicaea curtispina Haswell, 1882 | Cilicaea curtispina | 19 |
| Zuzara curtispina Harrison & Holdich, 1984 | Zuzara curtispina | 19 |
| Dynoides daguilarensis Li, 2000 | Dynoides daguilarensis | 3113 |
| Ancinus daltonae Menzies & Barnard, 1959 | Bathycopea daltonae | 75097 |
| Paracassidina dama Bruce, 1994 | Paracassidina dama | 19 |
| Cymodocea darwinii Cunningham, 1871 | Moruloidea darwinii | 3477 |
| Cymodoce davieae Kensley & Buxton, 1984 | Cymodoce davieae | 19 |
| Dynamenoides decima Hurley & Jansen, 1977 | Dynamenoides decima | 19 |
| Holotelson decoratus Nunomura & Ikehara, 1985 | Holotelson decoratus | 19 |
| Oxinasphaera denmoza Bruce, 1997 | Oxinasphaera denmoza | 3113 |
| Dynoides dentisinus Shen, 1929 | Dynoides dentisinus | 19 |
| Sphaeroma destructor Richardson | Sphaeroma destructor | 19 |
| Cymodocella diateichos Barnard, 1959 | Cymodocella diateichos | 19 |
| Zuzara digitata Harrison & Holdich, 1984 | Zuzara digitata | 19 |
| Dynamene dilatata Richardson, 1899 | Dynamene dilatata | 19 |
| Cercosphaera dilkera Bruce, 1994 | Cercosphaera dilkera | 3113 |
| Exosphaeroma diminutum Menzies & Frankenberg, 1966 | Exosphaeroma diminutum | 19 |
| Dynamenella dioxus Barnard, 1914 | Dynamenella dioxus | 19 |
| Paracerceis dollfusi Lombardo, 1985 | Paracerceis dollfusi | 19 |
| Cilicaea dolorosa Hurley & Jansen, 1977 | Cilicaea dolorosa | 19 |
| Isocladus dulciculus Hurley & Jansen, 1977 | Isocladus dulciculus | 19 |
| Sphaeroma dumerilii Leach, 1818 | Sphaeroma dumerilii | 19 |
| Cymodocella eatoni Miers, 1875 | Ischyromene eatoni | 3477 |
| Dynamene eatoni Miers, 1875 | Ischyromene eatoni | 88980 |
| Exosphaeroma echinensis Hurley & Jansen, 1977 | Exosphaeroma echinensis | 19 |
| Paracerceis edithae Boone, 1930 | Paracerceis edithae | 19 |
| Amphoroidea elegans Baker, 1911 | Amphoroidea elegans | 19 |
| Clianella elegans Boone, 1923 | Dynoides elegans | 75097 |
| Amphoroidella elliptica Baker, 1908 | Amphoroidella elliptica | 19 |
| Cassidina emarginata Guerin-Meneville, 1843 | Cassidinopsis emarginata | 3477 |
| Cymodoce emarginata Leach, 1818 | Cymodoce emarginata | 19 |
| Sphaeroma emarginatum Grube, 1864 | Sphaeroma emarginatum | 19 |
| Oxinasphaera epostoa Bruce, 1997 | Oxinasphaera epostoa | 3113 |
| Cymodoce erythraea Nobili, 1906 | Cymodoce erythraea | 19 |
| Exosphaeroma estuarium Barnard, 1951 | Exosphaeroma estuarium | 19 |
| Cymodocella eutylos Barnard, 1954 | Cymodocella eutylos | 19 |
| Cymodoce excavans Barnard, 1920 | Cymodoce excavans | 19 |
| Sphaeroma exosphaeroma Boone, 1918 | Lekanesphaera exosphaeroma | 81176 |
| Cassidina extenda Joshi & Bal, 1962 | Cassidina extenda | 3113 |
| Cymodoce falcata Barnard, 1920 | Cymodoce falcata | 19 |
| Paracilicaea falcata Benvenuti & Messana, 2000 | Paracilicaea falcata | 3113 |
| Exosphaeroma falcatum Tattersall, 1921 | Exosphaeroma falcatum | 19 |
| Amphoroidea falcifer Thomson, 1879 | Amphoroidea falcifer | 19 |
| Sphaeroma felix Lanchester, 1902 | Sphaeroma felix | 19 |
| Juletta fika Bruce, 1993 | Juletta fika | 19 |
| Paracilicaea fimbriata Kussakin, Malyutina, & Rostomov, 1990 | Paracilicaea fimbriata | 19 |
| Sphaeramene flausinae Loyola e Silva, 1966 | Sphaeramene flausinae | 19 |
| Paracilicaea flexilis Baker, 1928 | Paracilicaea flexilis | 19 |
| Pedinura flindersia Bruce, 2003 | Pedinura flindersia | 3113 |
| Cilicaeopsis floccosa Seed, 1973 | Cilicaeopsis floccosa | 19 |
| Exosphaeroides fluvialis Holdich & Harrison, 1983 | Exosphaeroides fluvialis | 19 |
| Cymodocella foveolata Menzies, 1962 | Cymodocella foveolata | 19 |
| Oxinasphaera frailea Bruce, 1997 | Oxinasphaera frailea | 3113 |
| Botryias fructiger Richardson, 1910 | Botryias fructiger | 19 |
| Oxinasphaera furcata Schotte & Kensley, 2005 | Oxinasphaera furcata | 3781 |
| Zuzara furcifer Barnard, 1920 | Zuzara furcifer | 19 |
| Cilicaeopsis furculata Harrison & Holdich, 1984 | Cilicaeopsis furculata | 19 |
| Pseudocerceis furculata Harrison & Holdich, 1982 | Pseudocerceis furculata | 19 |
| Cymodoce fuscina Schotte & Kensley, 2005 | Cymodoce fuscina | 3781 |
| Paracassidina fuscina Bruce, 1994 | Paracassidina fuscina | 19 |
| Cymodoce gaimardii Milne-Edwards, 1840 | Cymodoce gaimardii | 19 |
| Cymodetta gambosa Bowman & Kuhne, 1974 | Cymodetta gambosa | 19 |
| Sphaeroma gayi Nicolet, 1849 | Sphaeroma gayi | 19 |
| Cymodocella georgiana Walker, 1901 | Cymodocella georgiana | 3477 |
| Waiteolana gibbera Harrison, 1984 | Waiteolana gibbera | 19 |
| Paracilicaea gigas Baker, 1928 | Paracilicaea gigas | 19 |
| Sphaeroma gigas Leach, 1818 | Exosphaeroma gigas | 3477 |
| Cymodocella glabella Bruce, 1995 | Cymodocella glabella | 3113 |
| Lekanesphaera glabella Jacobs, 1987 | Lekanesphaera glabella | 19 |
| Dynamene glabra Richardson, 1899 | Dynamene glabra | 19 |
| Haswellia glauerti Baker, 1928 | Haswellia glauerti | 19 |
| Cilicaeopsis glebosa Harrison & Holdich, 1984 | Cilicaeopsis glebosa | 19 |
| Sphaeroma globicauda Dana, 1853 | Sphaeroma globicauda | 19 |
| Paracerceis glynni Kensley, 1984 | Paracerceis glynni | 19 |
| Paraleptosphaeroma glynni Buss & Iverson, 1981 | Paraleptosphaeroma glynni | 19 |
| Cymodopsis gorgoniae Baker, 1926 | Cymodopsis gorgoniae | 19 |
| Leptosphaeroma gottschei Hilgendorf, 1885 | Leptosphaeroma gottschei | 19 |
| Cymodetta gracilipes Holdich & Harrison, 1983 | Cymodetta gracilipes | 19 |
| Sphaeroma granti Walker & Scott, 1903 | Sphaeroma granti | 19 |
| Cerceis granulata Pillai, 1954 | Cerceis granulata | 19 |
| Cymodoce granulata Miers, 1876 | Cymodoce granulata | 19 |
| Dynamenella granulata Javed & Ahmed, 1988 | Dynamenella granulata | 19 |
| Cilicaea granulosa Richardson, 1899 | Cilicaea granulosa | 19 |
| Ceratocephalus grayanus Woodward, 1877 | Ceratocephalus grayanus | 19 |
| Cymodocella guarapariensis Silva, 1965 | Cymodocella guarapariensis | 8085 |
| Benthosphaera guaware Bruce, 1994 | Benthosphaera guaware | 3113 |
| Cilicaeopsis halei Baker, 1926 | Cilicaeopsis halei | 19 |
| Cilicaea hamata Stephenson, 1927 | Cilicaea hamata | 19 |
| Anoplocopea hanseni Racovitza, 1908 | Anoplocopea hanseni | 19 |
| Chitonopsis hanseni Nierstrasz, 1931 | Chitonopsis hanseni | 19 |
| Cymodoce hanseni Dumay, 1972 | Cymodoce hanseni | 19 |
| Paracilicaea hanseni Stebbing, 1910 | Paracilicaea hanseni | 19 |
| Kranosphaera haptomela Bruce, 1992 | Kranosphaera haptomela | 19 |
| Dynoides harrisoni Kussakin & Malyutina, 1993 | Dynoides harrisoni | 19 |
| Paradella harrisoni Müller, 1995 | Paradella harrisoni | 3113 |
| Cymodoce haswelli Harrison & Holdich, 1984 | Cymodoce haswelli | 19 |
| Cymodocella hawaiiensis Bruce, 1994 | Cymodocella hawaiiensis | 19 |
| Sphaeromopsis heardi Kensley & Schotte, 1994 | Sphaeromopsis heardi | 19 |
| Paradella heptaphymata Shoukr, Mona & Rizk, 1987 | Paradella heptaphymata | 3113 |
| Monolistra hercegoviniensis Absolon,1916 | Monolistra hercegoviniensis | 19 |
| Dynamenella hirsuta Hurley & Jansen, 1971 | Dynamenella hirsuta | 19 |
| Cymodoce hodgsoni Tattersall, 1921 | Cymodoce hodgsoni | 19 |
| Gnorimosphaeroma hoestandtli Kim & Kwon, 1985 | Gnorimosphaeroma hoestandtli | 19 |
| Gnorimosphaeroma hokurikuense Nunomura, 1998 | Gnorimosphaeroma hokurikuense | 3113 |
| Paracerceis holdichi Kussakin & Malyutina, 1993 | Paracerceis holdichi | 19 |
| Paravireia holdichi Brökeland, Wägele, & Bruce, 2001 | Paravireia holdichi | 3113 |
| Sphaeroma hookeri Leach, 1814 | Sphaeroma hookeri | 19 |
| Dynoides hoonsooi Kwon, 1990 | Dynoides hoonsooi | 19 |
| Isocladus howensis Baker, 1926 | Isocladus howensis | 19 |
| Platycerceis hyalina Baker, 1926 | Platycerceis hyalina | 19 |
| Exosphaeroma hylecoetes Barnard, 1940 | Exosphaeroma hylecoetes | 19 |
| Cilicaea hystrix Haswell, 1882 | Cilicaea hystrix | 19 |
| Paraimene ibarzabalae Kensley, Ortiz & Schotte, 1997 | Paraimene ibarzabalae | 3113 |
| Cymodopsis impudica Hurley & Jansen, 1977 | Cymodopsis impudica | 19 |
| Isocladus inaccuratus Hurley & Jansen, 1977 | Isocladus inaccuratus | 19 |
| Cassidinella incisa Whitelegge, 1901 | Cassidinella incisa | 19 |
| Paracassidina incompta Bruce, 1994 | Paracassidina incompta | 19 |
| Paraleptosphaeroma indica Müller, 1990 | Paraleptosphaeroma indica | 19 |
| Dynoides indicus Müller, 1991 | Dynoides indicus | 8381 |
| Isocladus indicus Nierstrasz, 1930 | Isocladus indicus | 19 |
| Cymodoce inornata Whitelegge, 1902 | Cymodoce inornata | 19 |
| Exosphaeroma inornata Dow, 1958 | Exosphaeroma inornata | 19 |
| Dynamenella insulsa Hurley & Jansen, 1977 | Dynamenella insulsa | 19 |
| Haswellia intermedia Baker, 1926 | Haswellia intermedia | 19 |
| Cymodoce iocosa Hurley & Jansen, 1977 | Cymodoce iocosa | 19 |
| Oxinasphaera islaya Bruce, 1997 | Oxinasphaera islaya | 3113 |
| Bathycopea ivanoi Birstein, 1963 | Bathycopea ivanoi | 19 |
| Pseudosphaeroma jakobii Loyola e Silva, 1959 | Pseudosphaeroma jakobii | 19 |
| Cymodoce japonica Richardson, 1906 | Cymodoce japonica | 19 |
| Dynamenella josephi Glynn, 1968 | Dynamenella josephi | 19 |
| Haswellia juxtacarnea Baker, 1926 | Haswellia juxtacarnea | 3113 |
| Paracilicaea keijii Javed, 1990 | Paracilicaea keijii | 19 |
| Discerceis kensleyi Schotte, 2005 | Discerceis kensleyi | 3113 |
| Oxinasphaera kensleyi Bruce, 1997 | Oxinasphaera kensleyi | 3113 |
| Afrocerceis kenyensis Müller, 1995 | Afrocerceis kenyensis | 3113 |
| Sphaeroma khalijfarsi Khalaji-Pirbalouty & Wägele, 2010 | Sphaeroma khalijfarsi | 3477 |
| Ischyromene kokotahi Bruce, 2006 | Ischyromene kokotahi | 3113 |
| Cassidinidea korpie Bruce, 1994 | Cassidinidea korpie | 19 |
| Exosphaeroma kraussi Tattersall, 1913 | Exosphaeroma kraussi | 19 |
| Gnorimosphaeroma kurilense Kussakin, 1974 | Gnorimosphaeroma kurilense | 3113 |
| Scutuloidea kutu Stephenson & Riley, 1996 | Scutuloidea kutu | 3113 |
| Paracassidina kutyo Bruce, 1994 | Paracassidina kutyo | 19 |
| Ischyromene lacazei Racovitza, 1908 | Ischyromene lacazei | 19 |
| Moruloidea lacertosa Baker, 1908 | Moruloidea lacertosa | 19 |
| Sphaeroma laevigatum Philippi, | Sphaeroma laevigatum | 3113 |
| Cilicaeopsis laevis Nierstrasz, 1931 | Cilicaeopsis laevis | 19 |
| Cassidina laticauda Whitelegge, 1901 | Cassidina laticauda | 19 |
| Pseudocerceis latistylis Kensley & Schotte, 1994 | Pseudocerceis latistylis | 3113 |
| Cilicaea latreillei Leach, 1818 | Cilicaea latreillei | 19 |
| Sphaeroma laurensi Hurley & Jansen, 1977 | Sphaeroma laurensi | 19 |
| Monolistra lavalensis Stoch, 1984 | Monolistra lavalensis | 19 |
| Cilicaeopsis lepida Kussakin & Malyutina, 1992 | Cilicaeopsis lepida | 19 |
| Dynamenella liochroea Harrison & Holdich, 1982 | Dynamenella liochroea | 19 |
| Cymodoce lirella Schotte & Kensley, 2005 | Cymodoce lirella | 3781 |
| Cymodoce lis Barnard, 1955 | Cymodoce lis | 19 |
| Oxinasphaera lobivia Bruce, 1997 | Oxinasphaera lobivia | 3113 |
| Holotelson longicauda Nunomura, 2004 | Holotelson longicauda | 3113 |
| Haswellia longicollis Canu & Bassler, 1929 | Haswellia longicollis | 8324 |
| Amphoroidea longipes Hurley & Jansen, 1977 | Amphoroidea longipes | 19 |
| Dynoides longisinus Kwon, 1990 | Dynoides longisinus | 19 |
| Cilicaea longispina Miers, 1884 | Cilicaea longispina | 19 |
| Cymodoce longistylis Miers, 1884 | Cymodoce longistylis | 19 |
| Oxinasphaera lowryi Bruce, 1997 | Oxinasphaera lowryi | 3113 |
| Thermosphaeroma macrura Bowman, 1985 | Thermosphaeroma macrura | 19 |
| Cassidina maculata Studer, 1884 | Cassidinopsis maculata | 3477 |
| Scutuloidea maculata Chilton, 1883 | Scutuloidea maculata | 19 |
| Isocladus magellanensis Richardson, 1906 | Isocladus magellanensis | 19 |
| Cymodocella magna Barnard, 1954 | Cymodocella magna | 19 |
| Dynamene magnitorata Holdich, 1968 | Dynamene magnitorata | 19 |
| Cymodoce mammifera Haswell, 1881 | Cymodoce mammifera | 19 |
| Lekanesphaera marginata Milne-Edwards, 1840 | Lekanesphaera marginata | 19 |
| Monolistra matjasici Sket, 1965 | Monolistra matjasici | 19 |
| Oxinasphaera matucana Bruce, 1997 | Oxinasphaera matucana | 3113 |
| Heterodina mccaini Schotte & Kensley, 2005 | Heterodina mccaini | 3781 |
| Amphoroidea media Hurley & Jansen, 1971 | Amphoroidea media | 19 |
| Exosphaeroma media George & Stromberg, 1968 | Exosphaeroma media | 19 |
| Platysphaera membranata Holdich & Harrison, 1981 | Platysphaera membranata | 19 |
| Thermosphaeroma mendozai Schotte, 2000 | Thermosphaeroma mendozai | 3113 |
| Cymodoce meridionalis Richardson, 1906 | Cymodoce meridionalis | 19 |
| Sphaeromopsis merohirsutus Ortiz, Lalana & Varela, 2004 | Sphaeromopsis merohirsutus | 3113 |
| Cassidinidea mexicana Hendrickx & Espinoza-Perez, 1998 | Cassidinidea mexicana | 3113 |
| Sphaeramene microtylotos Barnard, 1955 | Sphaeramene microtylotos | 19 |
| Bilistra millari Sket & Bruce, 2004 | Bilistra millari | 3113 |
| Thermosphaeroma milleri Bowman, 1981 | Thermosphaeroma milleri | 19 |
| Isocladus mimetes Barnard, 1955 | Isocladus mimetes | 19 |
| Sphaeromopsis minutus Javed & Yousuf, 1995 | Sphaeromopsis minutus | 19 |
| Juletta mirandae Bruce, 1993 | Juletta mirandae | 19 |
| Pedinura mokari Bruce, 2003 | Pedinura mokari | 3113 |
| Bilistra mollicopulans Sket & Bruce, 2004 | Bilistra mollicopulans | 3113 |
| Sphaeroma monodi Bocquet, Hoestlandt, Levi, 1954 | Sphaeroma monodi | 19 |
| Monolistra monstruosa Sket, 1970 | Monolistra monstruosa | 19 |
| Cymodopsis montis Hurley & Jansen, 1977 | Cymodopsis montis | 19 |
| Dynamenella mortenseni Hurley & Jansen, 1977 | Dynamenella mortenseni | 19 |
| Cassidinidea mosaica Kensley & Schotte, 1987 | Cassidinidea mosaica | 19 |
| Paracilicaea mossambica Barnard, 1914 | Paracilicaea mossambica | 3113 |
| Dynamenella mossambicus Ortiz, Berze-Freire & Wasikete, 1990 | Dynamenella mossambicus | 19 |
| Paracilicaea mossambicus Barnard, 1914 | Paracilicaea mossambicus | 19 |
| Sphaeroma mukaii Nunomura, 2006 | Sphaeroma mukaii | 3113 |
| Cymodoce multidens Richardson, 1910 | Cymodoce multidens | 19 |
| Paracassidina munna Bruce, 1994 | Paracassidina munna | 19 |
| Agostodina munta Bruce, 1994 | Agostodina munta | 19 |
| Gnorimosphaeroma naktongense Kwon & Kim, 1987 | Gnorimosphaeroma naktongense | 19 |
| Apemosphaera naranagi Bruce, 1994 | Apemosphaera naranagi | 19 |
| Cymodoce natalensis Barnard, 1920 | Cymodoce natalensis | 19 |
| Artopoles natalis Barnard, 1920 | Artopoles natalis | 19 |
| Dynamenella navicula Barnard, 1940 | Dynamenella navicula | 19 |
| Diclidocellla ngake Bruce, 1995 | Diclidocellla ngake | 3113 |
| Gnorimosphaeroma noblei Menzies, 1954 | Gnorimosphaeroma noblei | 19 |
| Paracilicaea nodosa Benvenuti & Messana, 2000 | Paracilicaea nodosa | 3113 |
| Dynamenella nuevitas Kensley, Ortiz & Schotte, 1997 | Dynamenella nuevitas | 3113 |
| Cilicaeopsis obesa Baker, 1926 | Cilicaeopsis obesa | 19 |
| Oxinasphaera obregonia Bruce, 1997 | Oxinasphaera obregonia | 3113 |
| Cerceis obtusa Baker, 1908 | Cerceis obtusa | 19 |
| Dynamenopsis obtusa Baker, 1908 | Dynamenopsis obtusa | 19 |
| Tholozodium ocellatum Eleftheriou, Holdich, & Harrison, 1980 | Tholozodium ocellatum | 19 |
| Paradella octaphymata Harrison & Holdich, 1982 | Paradella octaphymata | 19 |
| Cymodoce ornata Richardson, 1906 | Cymodoce ornata | 19 |
| Isocladus otion Barnard, 1955 | Isocladus otion | 19 |
| Cerceis ovata Baker, 1926 | Cerceis ovata | 19 |
| Exosphaeroma pallidum Barnard, 1940 | Exosphaeroma pallidum | 3113 |
| Exosphaeroma papillae Bayliff, 1938 | Exosphaeroma papillae | 19 |
| Bathycopea parallela Birstein, 1963 | Bathycopea parallela | 19 |
| Oxinasphaera parodia Bruce, 1997 | Oxinasphaera parodia | 3113 |
| Dynamenella parva Baker, 1928 | Dynamenella parva | 19 |
| Exosphaeroma parva Chilton, 1924 | Exosphaeroma parva | 19 |
| Caecocassidias patagonica Kussakin, 1967 | Caecocassidias patagonica | 19 |
| Monolistra pavani Arcangeli, 1941 | Monolistra pavani | 19 |
| Bregmotypta pavicula Bruce, 1994 | Bregmotypta pavicula | 3113 |
| Paracassidina pectinata Baker, 1911 | Paracassidina pectinata | 19 |
| Cymodoce pelsarti Tattersall, 1922 | Cymodoce pelsarti | 19 |
| Paracilicaea peniculata Benvenuti & Messana, 2000 | Paracilicaea peniculata | 3113 |
| Cymodoce penserosa Hurley & Jansen, 1977 | Cymodoce penserosa | 19 |
| Neosphaeroma pentaspina Baker, 1926 | Neosphaeroma pentaspina | 19 |
| Oxinasphaera penteumbonata Benvenuti, Messana & Schotte, 2000 | Oxinasphaera penteumbonata | 3113 |
| Sphaeroma pentodon Richardson, 1904 | Sphaeroma pentodon | 19 |
| Parisocladus perforatus Milne-Edwards, 1840 | Parisocladus perforatus | 19 |
| Moruloidea perionasus Bruce, 2003 | Moruloidea perionasus | 3113 |
| Sphaeroma peruvianum Richardson, 1910 | Sphaeroma peruvianum | 19 |
| Paracassidina petala Bruce, 1994 | Paracassidina petala | 19 |
| Sphaeromopsis petita Javed & Yousuf, 1997 | Sphaeromopsis petita | 3113 |
| Cerceis picta Nierstrasz, 1931 | Cerceis picta | 19 |
| Cymodoce picta Brocchi, 1875 | Cymodoce picta | 19 |
| Cymodoce pilosa Milne-Edwards, 1840 | Cymodoce pilosa | 19 |
| Exosphaeroma planulum Hurley & Jansen, 1971 | Exosphaeroma planulum | 19 |
| Exosphaeroma planum Barnard, 1914 | Exosphaeroma planum | 19 |
| Dynamenella platura Nobili, 1906 | Dynamenella platura | 19 |
| Sphaeroma plumosa Whitelegge, 1902 | Sphaeroma plumosa | 3113 |
| Sphaeroma podicipitis Monod, 1931 | Sphaeroma podicipitis | 19 |
| Ischyromene polytyla Harrison & Holdich, 1982 | Ischyromene polytyla | 19 |
| Sphaeramene polytylotos Barnard, 1914 | Sphaeramene polytylotos | 19 |
| Oxinasphaera poorei Bruce, 1997 | Oxinasphaera poorei | 3113 |
| Exosphaeroma porrectum Barnard, 1914 | Exosphaeroma porrectum | 19 |
| Cerceis pravipalma Harrison & Holdich, 1982 | Cerceis pravipalma | 19 |
| Monolistra pretneri Sket, 1964 | Monolistra pretneri | 19 |
| Sphaeroma prideauxianum Leach, 1818 | Sphaeroma prideauxianum | 19 |
| Exosphaeroma productatelson Menzies & Glynn, 1968 | Exosphaeroma productatelson | 19 |
| Paracassidina prolata Bruce, 1994 | Paracassidina prolata | 19 |
| Parasphaeroma prominens Stebbing, 1902 | Parasphaeroma prominens | 19 |
| Sphaeroma propinqua Nicolet, 1849 | Sphaeroma propinqua | 19 |
| Dynamenella ptychura Harrison & Holdich, 1982 | Dynamenella ptychura | 19 |
| Paracilicaea pubescens Milne-Edwards, 1840 | Paracilicaea pubescens | 19 |
| Exosphaeroma pulchellum Colosi, 1921 | Exosphaeroma pulchellum | 19 |
| Cassidina pulchra Chilton, 1924 | Cassidina pulchra | 19 |
| Hemisphaeroma pulchrum Hansen, 1905 | Hemisphaeroma pulchrum | 19 |
| Cymodocella pustulata Barnard, 1914 | Cymodocella pustulata | 19 |
| Cerceis pustulosa Harrison & Holdich, 1982 | Cerceis pustulosa | 81176 |
| Cassidinidea quadricarinata Pillai, 1954 | Cassidinidea quadricarinata | 19 |
| Exosphaeroides quadricosta Kensley, 2003 | Exosphaeroides quadricosta | 3113 |
| Sphaeroma quadridentatum Say, 1818 | Sphaeroma quadridentatum | 19 |
| Dynamenella quadrilirata Kensley, 1984 | Dynamenella quadrilirata | 19 |
| Dynamenella quilonensis Pillai, 1954 | Dynamenella quilonensis | 19 |
| Sphaeroma quoyanum Milne-Edwards, 1840 | Sphaeroma quoyanum | 19 |
| Monolistra racovitzai Strouhal, 1928 | Monolistra racovitzai | 19 |
| Cymodoce radiata Barnard, 1957 | Cymodoce radiata | 19 |
| Dynamene ramuscula Baker, 1908 | Dynamene ramuscula | 19 |
| Gnorimosphaeroma rayi Hoestlandt, 1969 | Gnorimosphaeroma rayi | 19 |
| Gnorimosphaeroma rebunense Nunomura, 1998 | Gnorimosphaeroma rebunense | 3113 |
| Benthosphaera reburra Bruce, 1994 | Benthosphaera reburra | 3113 |
| Oxinasphaera rebutia Bruce, 1997 | Oxinasphaera rebutia | 3113 |
| Isocladus reconditus Hurley & Jansen, 1977 | Isocladus reconditus | 19 |
| Dynamenella remex Schotte & Kensley, 2005 | Dynamenella remex | 3781 |
| Sphaeroma retrolaeve Richardson, 1904 | Sphaeroma retrolaeve | 19 |
| Paracerceis richardsonae Lombardo, 1988 | Paracerceis richardsonae | 3113 |
| Cymodoce richardsoniae Nobili, 1906 | Cymodoce richardsoniae | 3113 |
| Cymodoce robusta Nierstrasz, 1918 | Cymodoce robusta | 19 |
| Cymodoce ruetzleri Kensley, 1984 | Cymodoce ruetzleri | 19 |
| Sphaeroma rugicauda Leach, 1914 | Sphaeroma rugicauda | 19 |
| Neonaesa rugosa Harrison & Holdich, 1982 | Neonaesa rugosa | 19 |
| Waiteolana rugosa Baker, 1926 | Waiteolana rugosa | 19 |
| Beatricesphaera ruthae Wetzer & Bruce, 1999 | Beatricesphaera ruthae | 3113 |
| Dynoides saldani Carvacho & Haasmann, 1984 | Dynoides saldani | 19 |
| Sphaeromopsis sanctaluciae Kensley & Schotte, 1999 | Sphaeromopsis sanctaluciae | 3113 |
| Margueritta sandyi Bruce, 2003 | Margueritta sandyi | 3113 |
| Pistorius sasyamai Nunomura, 1990 | Pistorius sasyamai | 19 |
| Dynamenella savignii Milne-Edwards, 1840 | Dynamenella savignii | 19 |
| Dynamenella scaptocephala Messana, 1990 | Dynamenella scaptocephala | 19 |
| Monolistra schottlaenderi Stammer, 1930 | Monolistra schottlaenderi | 19 |
| Cilicaeopsis sculpta Baker, 1928 | Cilicaeopsis sculpta | 19 |
| Paracassidinopsis sculpta Nobili, 1906 | Paracassidinopsis sculpta | 19 |
| Sphaeromopsis sei Storey, 2002 | Sphaeromopsis sei | 3113 |
| Pseudocerceis seleneides Messana, 1988 | Pseudocerceis seleneides | 19 |
| Zuzara semipunctata Leach, 1818 | Zuzara semipunctata | 19 |
| Dynoides serratisinus Barnard, 1914 | Dynoides serratisinus | 19 |
| Sphaeromopsis serriguberna Holdich & Harrison, 1981 | Sphaeromopsis serriguberna | 19 |
| Exosphaeroma serventii Baker, 1928 | Exosphaeroma serventii | 19 |
| Paracilicaea setosa Müller, 1995 | Paracilicaea setosa | 3113 |
| Agostodina shara Bruce, 1994 | Agostodina shara | 19 |
| Sphaeroma shimantoensis Nunomura, 2003 | Sphaeroma shimantoensis | 3113 |
| Sphaeroma sieboldii Dollfus, 1889 | Sphaeroma sieboldii | 19 |
| Sphaeromopsis sikata Anil & Jayaraj 2021 | Sphaeromopsis sikata | 3477 |
| Cerceis sinensis Kussakin & Malyutina, 1993 | Cerceis sinensis | 19 |
| Sphaeroma sinensis Yu & Li, 2002 | Sphaeroma sinensis | 3113 |
| Thermosphaeroma smithi Bowman, 1981 | Thermosphaeroma smithi | 19 |
| Eterocerceis somala Messana, 1990 | Eterocerceis somala | 19 |
| Chitonopsis spatulifrons Whitelegge, 1902 | Chitonopsis spatulifrons | 19 |
| Cymodopsis sphyracephalata Hurley & Jansen, 1977 | Cymodopsis sphyracephalata | 19 |
| Isocladus spiculatus Hurley & Jansen, 1977 | Isocladus spiculatus | 19 |
| Dynoides spinipodus Kwon & Kim, 1986 | Dynoides spinipodus | 19 |
| Cymodoce spinula Yousuf & Javed, 2001 | Cymodoce spinula | 3113 |
| Cilicaea spinulosa Haswell, 1882 | Cilicaea spinulosa | 19 |
| Paracerceis spinulosa Espinoza-Perez & Hendrickx, 2002 | Paracerceis spinulosa | 3113 |
| Austrasphaera springthorpei Bruce, 2003 | Austrasphaera springthorpei | 3113 |
| Paracilicaea stauros Schotte & Kensley, 2005 | Paracilicaea stauros | 3781 |
| Paracilicaea stebbingi Baker, 1926 | Paracilicaea stebbingi | 19 |
| Exosphaeroma studeri Vanhoeffen, 1914 | Exosphaeroma studeri | 19 |
| Cilicaeopsis stylifera Whitelegge, 1902 | Cilicaeopsis stylifera | 19 |
| Thermosphaeroma subequalum Cole & Bane, 1978 | Thermosphaeroma subequalum | 19 |
| Cymodocella sublevis Barnard, 1914 | Cymodocella sublevis | 19 |
| Cassidina sulcata Thielemann, 1910 | Cassidina sulcata | 19 |
| Sphaeromopsis sulcifera Schotte & Kensley, 2005 | Sphaeromopsis sulcifera | 3781 |
| Margueritta sylviae Bruce, 1993 | Margueritta sylviae | 19 |
| Cilicaea tasmanensis Hurley & Jansen, 1977 | Cilicaea tasmanensis | 19 |
| Cymodoce tattersalli Torelli, 1929 | Cymodoce tattersalli | 19 |
| Dynamenella taurus Barnard, 1940 | Dynamenella taurus | 19 |
| Cilicaea tenuicaudata Haswell, 1881 | Cilicaea tenuicaudata | 19 |
| Lekanesphaera terceirae Jacobs, 1987 | Lekanesphaera terceirae | 19 |
| Sphaeroma terebrans Bate, 1866 | Sphaeroma terebrans | 19 |
| Paracilicaea teretron Barnard, 1955 | Paracilicaea teretron | 19 |
| Cymodoce tetrahele Barnard, 1920 | Cymodoce tetrahele | 19 |
| Oxinasphaera tetrodon Schotte & Kensley, 2005 | Oxinasphaera tetrodon | 3781 |
| Oxinasphaera thetisae Bruce, 1997 | Oxinasphaera thetisae | 3113 |
| Paradella tiffany Bruce & Wetzer, 2004 | Paradella tiffany | 3113 |
| Paracerceis tomentosa Schultz & McCloskey, 1967 | Paracerceis tomentosa | 19 |
| Sphaeroma tomentosum Guerin-Meneville, 1844 | Sphaeroma tomentosum | 19 |
| Paradella tomleklek Storey, 2002 | Paradella tomleklek | 3113 |
| Gnorimosphaeroma tondaense Nunomura, 1999 | Gnorimosphaeroma tondaense | 3113 |
| Dynamene torelliae Holdich, 1968 | Dynamene torelliae | 19 |
| Cymodopsis torminosa Hurley & Jansen, 1977 | Cymodopsis torminosa | 19 |
| Dynamenella trachydermata Harrison & Holdich,1982 | Dynamenella trachydermata | 19 |
| Cymodoce tribullis Harrison & Holdich, 1984 | Cymodoce tribullis | 19 |
| Cerceis tridentata Milne-Edwards, 1840 | Cerceis tridentata | 19 |
| Cymodoce trilobata Miers, 1905 | Cymodoce trilobata | 19 |
| Cymodoce tripartita Richardson, 1910 | Cymodoce tripartita | 19 |
| Sphaeroma triste Heller, 1865 | Sphaeroma triste | 19 |
| Cassidias trituberculata Thielemann, 1910 | Cassidias trituberculata | 19 |
| Dynamenella tropica Loyola e Silva, 1960 | Dynamenella tropica | 19 |
| Cymodoce truncata Leach, 1814 | Cymodoce truncata | 19 |
| Exosphaeroma truncatitelson Barnard, 1940 | Exosphaeroma truncatitelson | 3113 |
| Oxinasphaera tual Bruce, 1997 | Oxinasphaera tual | 3113 |
| Cassidinidea tuberculata Richardson, 1912 | Cassidinidea tuberculata | 19 |
| Cerceis tuberculata Müller, 1991 | Cerceis tuberculata | 19 |
| Cilicaeopsis tuberculata Kussakin & Malyutina, 1992 | Cilicaeopsis tuberculata | 19 |
| Cymodoce tuberculata Costa, 1851 | Cymodoce tuberculata | 19 |
| Paradella tuberculata Müller, 1991 | Paradella tuberculata | 19 |
| Paraimene tuberculata Javed & Ahmed, 1988 | Paraimene tuberculata | 19 |
| Waiteolana tuberculata Kussakin, 1967 | Waiteolana tuberculata | 19 |
| Sphaeroma tuberculatum Purusotham & Rao, 1971 | Sphaeroma tuberculatum | 19 |
| Holotelson tuberculatus Richardson, 1909 | Holotelson tuberculatus | 19 |
| Cymodoce tuberculosa Stebbing, 1873 | Cymodoce tuberculosa | 19 |
| Dynamene tuberculosa Richardson, 1899 | Dynamene tuberculosa | 19 |
| Cymodocella tubicauda Pfeffer, 1887 | Cymodocella tubicauda | 19 |
| Dynamene tubicauda Holdich, 1968 | Dynamene tubicauda | 19 |
| Moruloidea tumida Harrison, 1984 | Moruloidea tumida | 19 |
| Paraimene tumulus Kensley, Ortiz & Schotte, 1997 | Paraimene tumulus | 3113 |
| Amphoroidea typa Milne-Edwards, 1840 | Amphoroidea typa | 19 |
| Cassidina typa Milne-Edwards, 1840 | Cassidina typa | 19 |
| Bathycopea typhlops Tattersall, 1905 | Bathycopea typhlops | 19 |
| Paravireia typicus Chilton, 1925 | Paravireia typicus | 19 |
| Cymodoce umbonata Barnard, 1914 | Cymodoce umbonata | 19 |
| Cymodoce uncinata Stebbing, 1902 | Cymodoce uncinata | 19 |
| Paracilicaea uncinata Benvenuti & Messana, 2000 | Paracilicaea uncinata | 3113 |
| Cymodoce unguiculata Barnard, 1914 | Cymodoce unguiculata | 19 |
| Dynamenopsis varicolor Hurley & Jansen, 1971 | Dynamenopsis varicolor | 19 |
| Exosphaeroma varicolor Barnard, 1914 | Exosphaeroma varicolor | 19 |
| Monolistra velkovrhi Sket, 1960 | Monolistra velkovrhi | 19 |
| Cymodoce velutina Kensley, 1975 | Cymodoce velutina | 19 |
| Sphaeroma venustissimum Monod, 1931 | Sphaeroma venustissimum | 19 |
| Caecosphaeroma virei Dollfus, 1896 | Caecosphaeroma virei | 19 |
| Dynoides viridis Bruce, 1982 | Dynoides viridis | 19 |
| Dynamenoides vulcanata Hurley & Jansen, 1977 | Dynamenoides vulcanata | 19 |
| Sphaeroma wadai Nunomura, 1994 | Sphaeroma wadai | 3113 |
| Exosphaeroma waitemata Bruce, 2005 | Exosphaeroma waitemata | 3113 |
| Sphaeroma walkeri Stebbing, 1905 | Sphaeroma walkeri | 19 |
| Paracilicaea watamuae Müller, 1995 | Paracilicaea watamuae | 3113 |
| Sphaeroma weilli Elkaim, 1967 | Sphaeroma weilli | 19 |
| Cilicaea whiteleggei Stebbing, 1905 | Cilicaeopsis whiteleggei | 81565 |
| Cercosphaera wirritin Bruce, 1994 | Cercosphaera wirritin | 3113 |
| Paracassidina wurrook Bruce, 1994 | Paracassidina wurrook | 19 |
| Diclidocellla yackatoon Bruce, 1995 | Diclidocellla yackatoon | 3113 |
| Dynamenella yomsii Storey, 2002 | Dynamenella yomsii | 3113 |
| Cymodoce zanzibarensis Stebbing, 1910 | Cymodoce zanzibarensis | 19 |