• Aeolosoma aurigena (Eichwald, 1847) (uncertain > taxon inquirendum)
• Aeolosoma fiedleri Bretscher, 1896 (uncertain > taxon inquirendum)
• Aeolosoma flavum Štolc, 1903
• Aeolosoma gracile Štolc, 1903 (uncertain > taxon inquirendum)
• Aeolosoma hemprichii Ehrenberg, 1828
• Aeolosoma josephi Štolc, 1903 (uncertain > taxon inquirendum)
• Aeolosoma leidyi Cragin, 1887
• Aeolosoma macrogaster Schmarda, 1861 (uncertain > taxon inquirendum)
• Aeolosoma markewitschi Boshko & Pashkevichute, 1975 accepted as Hystricosoma chappuisi markewitschi (Boshko & Pashkevichute, 1975)
• Aeolosoma neizvestnovi Lastochkin, 1935 accepted as Rheomorpha neizvestnovae (Lastochkin, 1935)
• Aeolosoma pictum Schmarda, 1861 accepted as Hystricosoma pictum (Schmarda, 1861)
• Aeolosoma stokesii Cragin, 1887 (uncertain > taxon inquirendum)
• Aeolosoma tenuidorsum Baskin, 1928
• Aeolosoma ternarium Schmarda, 1861 (uncertain > taxon inquirendum)
• Aeolosoma venustum Leidy, 1850 (uncertain > taxon inquirendum)
• Asteriomyzostomum asteriae (Marenzeller, 1895)
• Asteriomyzostomum fisheri (Wheeler, 1905)
• Asteriomyzostomum hercules Jimi, Moritaki & Kajihara, 2017
• Asteriomyzostomum jinshou Jimi, Moritaki & Kajihara, 2017
• Asteriomyzostomum monroeae Jimi, Moritaki & Kajihara, 2017
• Asteromyzostomum grygieri Summers & Rouse, 2014
• Contramyzostoma sphaera Eeckhaut, Grygier & Deheyn, 1998
• Cyclocirra thompsonii Müller, 1841
• Cystimyzostomum cysticolum (Graff, 1883) accepted as Myzostoma cysticolum Graff, 1883
• Diplotis hyalina Montagu, 1816 (uncertain > taxon inquirendum)
• Diurodrilus ankeli Ax, 1967
• Diurodrilus benazzii Gerlach, 1952
• Diurodrilus dohrni Gerlach, 1953
• Diurodrilus kunii Kajihara, Ikoma, Yamasaki & Hiruta, 2019
• Diurodrilus minimus Remane, 1925
• Diurodrilus subterraneus Remane, 1934
• Diurodrilus westheidei Kristensen & Niilonen, 1982
• Eenymeenymyzostoma cirripedium (Graff, 1885)
• Eenymeenymyzostoma nigrocorallium Terrana & Eeckhaut, 2017
• Endomyzostoma neridae Summers & Rouse, 2014
• Endomyzostoma scotia Summers & Rouse, 2014
• Hypomyzostoma crosslandi (Boulenger, 1913)
• Hypomyzostoma folium (Graff, 1884)
• Hypomyzostoma jasoni Summers & Rouse, in Summers Al-Hakim & Rouse, 2014
• Hypomyzostoma jonathoni Summers & Rouse, in Summers Al-Hakim & Rouse, 2014
• Hypomyzostoma membranaceum (Graff, 1887)
• Hystricosoma chappuisi Michaelsen, 1926
• Hystricosoma chappuisi markewitschi (Boshko & Pashkevichute, 1975)
• Hystricosoma pictum (Schmarda, 1861)
• Lobatocerebrum psammicola Rieger, 1980
• Lobatocerebrum riegeri Kerbl, Bekkouche, Sterrer & Worsaae, 2015
• Mesomyzostoma botulus Rouse, Lanterbecq, Summers & Eeckhaut, 2016
• Mesomyzostoma katoi Okada, 1933
• Mesomyzostoma lanterbecqae Summers & Rouse, in Summers Al-Hakim & Rouse, 2014
• Mesomyzostoma leukos Rouse, Lanterbecq, Summers & Eeckhaut, 2016
• Mesomyzostoma okadai Rouse, Lanterbecq, Summers & Eeckhaut, 2016
• Mesomyzostoma reichenspergeri Remscheid, 1918
• Millepeda marina Seba, 1734 (uncertain > nomen dubium)
• Millepeda marina amboinensis Seba, 1734 accepted as Hermodice carunculata (Pallas, 1766)
• Millepeda marina belgica Seba, 1734 (uncertain > nomen dubium)
• Mycomyzostoma calcidicola Eeckhaut, 1998
• Myzostoma abundans Graff, 1883
• Myzostoma adhaerens Remscheid, 1918
• Myzostoma agassizii Graff, 1883
• Myzostoma alatum Graff, 1884
• Myzostoma ambiguum Graff, 1887
• Myzostoma antarcticum Stummer-Traunfels, 1908
• Myzostoma antennatum Graff, 1884
• Myzostoma areolatum Graff, 1883
• Myzostoma armatae Grygier, 1989
• Myzostoma aruense Remscheid, 1918
• Myzostoma asteriae Marenzeller, 1895 accepted as Asteriomyzostomum asteriae (Marenzeller, 1895)
• Myzostoma asymmetricum Graff, 1884
• Myzostoma atrum Atkins, 1927
• Myzostoma attenuatum Grygier, 1989
• Myzostoma australe Rouse, 2003
• Myzostoma beardi Graff, 1887
• Myzostoma belli Wheeler, 1897
• Myzostoma bicaudatum Greeff, 1883
• Myzostoma bicorne Remscheid, 1918
• Myzostoma bocki Jägersten, 1937
• Myzostoma brachiatum Graff, 1877
• Myzostoma brevicirrum Graff, 1884
• Myzostoma brevilobatum Jägersten, 1937
• Myzostoma brevipes Graff, 1883
• Myzostoma bucchichii Wagner, 1887
• Myzostoma calycotyle Graff, 1884
• Myzostoma caribbeanum Graff, 1883
• Myzostoma carinatum Graff, 1883
• Myzostoma carpenteri Graff, 1884
• Myzostoma cerriferoidum McClendon, 1907
• Myzostoma chelonium McClendon, 1906
• Myzostoma chelonoidium McClendon, 1906
• Myzostoma chinesicum Graff, 1884
• Myzostoma circinatum Wheeler, 1897
• Myzostoma cirricostatum Jägersten, 1937
• Myzostoma cirriferum Leuckart, 1836
• Myzostoma cirripedium Graff, 1885 accepted as Eenymeenymyzostoma cirripedium (Graff, 1885)
• Myzostoma clarki McClendon, 1906
• Myzostoma compressum Graff, 1884
• Myzostoma coriaceum Graff, 1884
• Myzostoma cornutum Graff, 1877
• Myzostoma coronatum Graff, 1884
• Myzostoma costatum Leuckart, 1830 (unaccepted > nomen nudum)
• Myzostoma crenatum Graff, 1883