| Nominal Species (n = 339) | Present allocation (n = 328) | Ref. |
|---|---|---|
| Ascorhynchus abyssi Sars, 1877 | Ascorhynchus abyssi | 19 |
| Eurycyde acanthopus Stock, 1979 | Eurycyde acanthopus | 19 |
| Cilunculus acanthus Fry & Hedgpeth, 1969 | Cilunculus acanthus | 19 |
| Dromedopycnon acanthus Child, 1982 | Dromedopycnon acanthus | 19 |
| Ammothea acheliata Child, 1998 | Ammothea acheliata | 9 |
| Cilunculus achelioides Stock, 1991 | Cilunculus achelioides | 19 |
| Nymphopsis acinacispinatus Williams, 1933 | Nymphopsis acinacispinatus | 19 |
| Tanystylum acuminatum Stock, 1954 | Tanystylum acuminatum | 19 |
| Achelia adelpha Child, 1970 | Achelia adelpha | 19 |
| Ammothea adunca Child, 1994 | Ammothea adunca | 9 |
| Ascorhynchus agassizi Schimkewitsch, 1893 | Ascorhynchus agassizi | 19 |
| Ammothea alaskensis Cole, 1904 | Achelia alaskensis | 2153 |
| Ammothella alcalai Child, 1988 | Ammothella alcalai | 19 |
| Cilunculus alcicornis Stock, 1978 | Cilunculus alcicornis | 19 |
| Ammothea allopodes Fry & Hedgpeth, 1969 | Ammothea allopodes | 19 |
| Heterofragilia amica Stock, 1954 | Heterofragilia amica | 19 |
| Prototrygaeus ammothelloides Stock, 1975 | Prototrygaeus ammothelloides | 19 |
| Nymphopsis anarthra Loman, 1928 | Nymphopsis anarthra | 19 |
| Achelia anomala Arnaud, 1974 | Achelia anomala | 19 |
| Eurycyde antarctica Child, 1987 | Eurycyde antarctica | 19 |
| Tanystylum anthomasti Hedgpeth, 1949 | Tanystylum grossifemora | 19 |
| Cilunculus antillensis Stock, 1955 | Cilunculus antillensis | 19 |
| Ammothea antipodensis Clark, 1972 | Ammothea antipodensis | 19 |
| Tanystylum antipodum Clark, 1977 | Tanystylum antipodum | 19 |
| Ascorhynchus antipodus Child, 1987 | Ascorhynchus antipodus | 19 |
| Eurycyde arctica Child, 1995 | Eurycyde arctica | 19 |
| Achelia armata Bouvier, 1916 | Achelia armata | 3477 |
| Nymphopsis armatus Haswell, 1884 | Nymphopsis armatus | 19 |
| Ammothea armentis Child, 1994 | Ammothea armentis | 19 |
| Dromedopycnon arthritis Bamber, 2004 | Dromedopycnon arthritis | 1852 |
| Ammothea assimilis Haswell, 1884 | Achelia assimilis | 6 |
| Cilunculus ateuchus Bamber, 2004 | Cilunculus ateuchus | 1852 |
| Ascorhynchus athernum Child, 1982 | Ascorhynchus athernum | 19 |
| Oorhynchus aucklandiae Hoek, 1881 | Oorhynchus aucklandiae | 19 |
| Achelia australiensis Stock, 1954 | Achelia australiensis | 19 |
| Ammothea australiensis Flynn, 1919 | Ammothea australiensis | 19 |
| Cilunculus australiensis Clark, 1963 | Cilunculus australiensis | 19 |
| Ascorhynchus bacescui Stock, 1975 | Ascorhynchus bacescui | 19 |
| Achelia barnardi Stock, 1959 | Achelia barnardi | 19 |
| Nymphopsis bathursti Williams, 1940 | Nymphopsis bathursti | 19 |
| Cilunculus battenae Bamber & Thurston, 1993 | Cilunculus battenae | 19 |
| Ammothea bentartica Munilla-Leon, 2001 | Ammothea bentartica | 19 |
| Achelia besnardi Sawaya, 1951 | Achelia besnardi | 19 |
| Tanystylum beuroisi Arnaud, 1974 | Tanystylum beuroisi | 19 |
| Ammothea bicorniculata Stiboy-Risch, 1992 | Ammothea bicorniculata | 19 |
| Sericosura bifurcata Stock, 1991 | Sericosura bifurcata | 19 |
| Ammothea bigibbosa Munilla & Ramos, 2005 | Ammothea bigibbosa | 1837 |
| Tanystylum bigibbosum Fage & Stock, 1966 | Tanystylum bigibbosum | 19 |
| Tanystylum birkelandi Child, 1979 | Tanystylum birkelandi | 19 |
| Ascorhynchus birsteini Turpaeva, 1971 | Ascorhynchus birsteini | 19 |
| Achelia bituberculata Hedgpeth, 1949 | Achelia bituberculata | 19 |
| Ammothea borealis Schimkewitsch, 1895 | Achelia borealis | 2153 |
| Achelia boschi Stock, 1992 | Achelia boschi | 19 |
| Tanystylum bredini Child, 1970 | Tanystylum bredini | 19 |
| Heterofragilia brevicauda Stock, 1991 | Heterofragilia brevicauda | 19 |
| Tanystylum brevicaudatum Fage & Stock, 1966 | Tanystylum brevicaudatum | 19 |
| Biammothea brevipalpa Pushkin, 1993 | Biammothea brevipalpa | 19 |
| Achelia brevirostris Losina-Losinsky, 1961 | Achelia brevirostris | 19 |
| Ascorhynchus breviscapus Stock, 1968 | Ascorhynchus breviscapus | 19 |
| Ascorhynchus bucerus Turpaeva, 1971 | Ascorhynchus bucerus | 19 |
| Achelia bullosa Child, 1996 | Achelia bullosa | 19 |
| Ascorhynchus cactoides Stock, 1954 | Ascorhynchus cactoides | 19 |
| Cilunculus cactoides Fry & Hedgpeth, 1969 | Cilunculus cactoides | 19 |
| Austroraptus calcaratus Gordon, 1944 | Austroraptus calcaratus | 19 |
| Tanystylum calcirostrum Schimkewitsch, 1887 | Tanystylum calcirostrum | 19 |
| Tanystylum californicum Hilton, 1939 | Tanystylum californicum | 19 |
| Ammothea calmani Gordon, 1932 | Ammothea calmani | 19 |
| Ammothea carolinensis Leach, 1814 | Ammothea carolinensis | 19 |
| Ascorhynchus castellioides Stock, 1957 | Ascorhynchus castellioides | 19 |
| Tanystylum cavidorsum Stock, 1957 | Tanystylum cavidorsum | 19 |
| Tanystylum chierchiai Schimkewitsch, 1887 | Tanystylum chierchiai | 19 |
| Ammothea childi Cano & López-González, 2013 | Ammothea childi | 3477 |
| Tanystylum cinctum Child, 1992 | Tanystylum cinctum | 19 |
| Ephyrogymna circularis Hedgpeth, 1943 | Ephyrogymna circularis | 19 |
| Ammothea clausi Pfeffer, 1889 | Ammothea clausi | 19 |
| Eurycyde clitellaria Stock, 1955 | Eurycyde clitellaria | 19 |
| Sericosura cochleifovea Child, 1989 | Sericosura cochleifovea | 19 |
| Ascorhynchus colei Hedgpeth, 1943 | Ascorhynchus colei | 19 |
| Achelia columnaris Stock, 1992 | Achelia columnaris | 19 |
| Ascorhynchus comatus Child, 1992 | Ascorhynchus comatus | 19 |
| Trygaeus communis Dohrn, 1881 | Trygaeus communis | 19 |
| Ascorhynchus compactus Clark, 1963 | Ascorhynchus compactus | 19 |
| Cilunculus compactus Stock, 1991 | Cilunculus compactus | 19 |
| Ascorhynchus constrictus Stock, 1991 | Ascorhynchus constrictus | 1852 |
| Prototrygaeus contrarius Child, 1992 | Prototrygaeus contrarius | 19 |
| Ascorhynchus cooki Child, 1987 | Ascorhynchus cooki | 19 |
| Ascorhynchus corderoi du Bois-Reymond Marcus, 1952 | Ascorhynchus corderoi | 19 |
| Ascorhynchus crenatus Child, 1992 | Ascorhynchus crenatus | 19 |
| Cilunculus crinitus Stock, 1991 | Cilunculus crinitus | 19 |
| Achelia crurispinifera Kim & Kim, 1985 | Achelia crurispinifera | 19 |
| Ascorhynchus cryptopygius Ortmann, 1890 | Ascorhynchus cryptopygius | 19 |
| Ascorhynchus cuculus Fry & Hedgpeth, 1969 | Ascorhynchus cuculus | 19 |
| Nymphopsis curtiscapus Stock, 1974 | Nymphopsis curtiscapus | 19 |
| Eurycyde curvata Child, 1979 | Eurycyde curvata | 19 |
| Cilunculus cymobostrychos Bamber, 2004 | Cilunculus cymobostrychos | 1852 |
| Ammothella cymosa Nakamura & Child, 1983 | Ammothella cymosa | 19 |
| Sericosura cyrtoma Child & Ségonzac, 1996 | Sericosura cyrtoma | 19 |
| Ammothella dawsoni Child & Hedgpeth, 1971 | Ammothella dawsoni | 19 |
| Achelia deodata Müller, 1990 | Achelia deodata | 19 |
| Ammothea depolaris Stock, 1966 | Ammothea depolaris | 19 |
| Eurycyde depressa Child, 1995 | Eurycyde depressa | 19 |
| Eurycyde diacantha Stock, 1990 | Eurycyde diacantha | 19 |
| Ascorhynchus dietheus Child, 2002 | Ascorhynchus dietheus | 19 |
| Ascorhynchus discrepans Stock, 1955 | Ascorhynchus discrepans | 19 |
| Tanystylum distinctum Child & Hedgpeth, 1971 | Tanystylum distinctum | 19 |
| Tanystylum dohrni Schimkewitsch, 1889 | Tanystylum dohrni | 19 |
| Tanystylum dowi Child, 1979 | Tanystylum dowi | 19 |
| Nymphopsis dromedaria McCloskey, 1967 | Nymphopsis dromedaria | 19 |
| Boehmia dubia Hedgpeth, 1950 | Boehmia dubia | 19 |
| Nymphopsis duodorsospinosa Hilton, 1942 | Nymphopsis duodorsospinosa | 19 |
| Tanystylum duospinum Hilton, 1939 | Tanystylum duospinum | 19 |
| Achelia echinata Hodge, 1864 | Achelia echinata | 19 |
| Ammothella elegantula Stock, 1968 | Ammothella elegantula | 19 |
| Ammothella encantada Child & Hedgpeth, 1971 | Eurycyde longisetosa | 19 |
| Eurycyde encantada Child & Hedgpeth, 1971 | Eurycyde longisetosa | 75097 |
| Ascorhynchus endoparasiticus Arnaud, 1978 | Ascorhynchus endoparasiticus | 19 |
| Cilunculus europaeus Stock, 1978 | Cilunculus europaeus | 19 |
| Tanystylum evelinae Marcus, 1940 | Tanystylum evelinae | 19 |
| Tanystylum excuratum Stock, 1954 | Tanystylum excuratum | 19 |
| Ammothella exornata Stock, 1975 | Ammothella exornata | 19 |
| Eurycyde extenuata Calman, 1938 | Bathyzetes extenuata | 19 |
| Paranymphon filarium Stock, 1986 | Paranymphon filarium | 19 |
| Heterofragilia fimbriata Hedgpeth, 1943 | Heterofragilia fimbriata | 19 |
| Eurycyde flagella Nakamura & Chullasorn, 2000 | Eurycyde flagella | 19 |
| Ascorhynchus foresti Stock, 1991 | Ascorhynchus foresti | 19 |
| Ascorhynchus fragilis Stock, 1991 | Ascorhynchus fragilis | 19 |
| Cilunculus frontosus Loman, 1908 | Cilunculus frontosus | 19 |
| Ascorhynchus fusticulus Nakamura & Child, 1983 | Ascorhynchus fusticulus | 19 |
| Cilunculus galeritus Nakamura & Child, 1991 | Cilunculus galeritus | 19 |
| Tanystylum geminum Stock, 1954 | Tanystylum geminum | 19 |
| Calypsopycnon georgiae Hedgpeth, 1948 | Calypsopycnon georgiae | 19 |
| Ammothella gibraltarensis Munilla, 1993 | Ammothella gibraltarensis | 19 |
| Ammothea gigantea Gordon, 1932 | Ammothea gigantea | 19 |
| Ascorhynchus glaber Hoek, 1881 | Ascorhynchus glaber | 19 |
| Ascorhynchus glaberrimus Schimkewitsch, 1913 | Ascorhynchus glaberrimus | 19 |
| Eurycyde gorda Child, 1979 | Eurycyde gorda | 19 |
| Ammothea gordonae Child, 1994 | Ammothea gordonae | 19 |
| Achelia gracilis Verrill, 1900 | Achelia gracilis | 19 |
| Cilunculus gracilis Nakamura & Child, 1991 | Cilunculus gracilis | 19 |
| Nanymphon grasslei McCloskey, 1967 | Ascorhynchus pyrginospinum | 19 |
| Ammothea grossifemora Hilton, 1942 | Tanystylum grossifemora | 2153 |
| Cilunculus hardai Nakamura & Child, 1983 | Cilunculus hardai | 19 |
| Achelia hariettae Marcus, 1940 | Achelia hariettae | 19 |
| Tanystylum haswelli Child, 1990 | Tanystylum haswelli | 19 |
| Ammothella hedgpethi Fage, 1953 | Ammothella hedgpethi | 19 |
| Ascorhynchus hedgpethi Turpaeva, 1974 | Ascorhynchus hedgpethi | 19 |
| Ascorhynchus heuresis Bamber, 2002 | Ascorhynchus heuresis | 19 |
| Chonothea hians Nakamura & Child, 1983 | Chonothea hians | 19 |
| Ascorhynchus hippos Turpaeva, 1994 | Ascorhynchus hippos | 19 |
| Heterofragilia hirsuta Nakamura & Child, 1991 | Heterofragilia hirsuta | 19 |
| Cilunculus hirsutus Clark, 1963 | Cilunculus hirsutus | 19 |
| Tanystylum hoekianum Schimkewitsch, 1887 | Tanystylum hoekianum | 19 |
| Tanystylum hooperi Clark, 1977 | Tanystylum hooperi | 19 |
| Ascorhynchus horologius Child, 1992 | Ascorhynchus horologius | 19 |
| Tanystylum hummelincki Stock, 1954 | Tanystylum hummelincki | 19 |
| Ammothella indica Stock, 1954 | Ammothella indica | 6 |
| Ascorhynchus inflatus Stock, 1963 | Ascorhynchus inflatus | 19 |
| Ammothea insularis Child, 1992 | Ammothea insularis | 19 |
| Ascorhynchus insularus Clark, 1972 | Ascorhynchus insularus | 19 |
| Tanystylum intermedium Cole, 1904 | Tanystylum intermedium | 19 |
| Hedgpethius interstitialis Stock, 1989 | Hedgpethius interstitialis | 19 |
| Ascorhynchus ios Bamber & Thurston, 1993 | Ascorhynchus ios | 19 |
| Tanystylum isabellae Marcus, 1940 | Tanystylum isabellae | 19 |
| Tanystylum isthmiacum Stock, 1955 | Tanystylum isthmiacum | 19 |
| Ammothella japonica Turpaeva, 1990 | Ammothella japonica | 19 |
| Ascorhynchus japonicus Ives, 1891 | Ascorhynchus japonicus | 19 |
| Prototrygaeus jordanae Child, 1990 | Prototrygaeus jordanae | 19 |
| Austroraptus juvenilis Calman, 1915 | Austroraptus juvenilis | 19 |
| Achelia kamtschatica Losina-Losinsky, 1961 | Achelia kamtschatica | 19 |
| Achelia kiiensis Utinomi, 1951 | Achelia kiiensis | 19 |
| Ammothella killix Dojiri, Cadien & Phillips, 1991 | Ammothella setosa | 19 |
| Nymphopsis korotnewi Schimkewitsch, 1887 | Nymphopsis korotnewi | 19 |
| Cilunculus kravcovi Pushkin, 1973 | Cilunculus kravcovi | 19 |
| Achelia kurilensis Losina-Losinsky, 1961 | Achelia kurilensis | 19 |
| Achelia laevis Hodge, 1864 | Achelia laevis | 19 |
| Achelia lagena Child, 1994 | Achelia lagena | 19 |
| Achelia lagenaria Stock, 1992 | Achelia lagenaria | 19 |
| Nymphonella lambertensis Stock, 1959 | Nymphonella lambertensis | 19 |
| Elassorhis laterospinata Child, 1982 | Elassorhis laterospinata | 19 |
| Ascorhynchus laterospinus Hilton, 1942 | Ascorhynchus laterospinus | 19 |
| Ammothea latifrons Cole, 1904 | Achelia latifrons | 2153 |
| Nanymphon latum Calman, 1923 | Ascorhynchus ramipes | 19 |
| Ascorhynchus latus Calman, 1923 | Ascorhynchus ramipes | 75097 |
| Ascorhynchus levissimus Loman, 1908 | Ascorhynchus levissimus | 19 |
| Ascorhynchus levivani Turpaeva, 1994 | Ascorhynchus levivani | 19 |
| Eurycyde longioculata Müller, 1990 | Eurycyde longioculata | 19 |
| Boehmia longirostris Stock, 1957 | Boehmia longirostris | 19 |
| Eurycyde longisetosa Hilton, 1942 | Eurycyde longisetosa | 19 |
| Ammothea longispina Gordon, 1932 | Ammothea longispina | 19 |
| Hemichela longiunguis Staples, 1982 | Hemichela longiunguis | 19 |
| Ascorhynchus losinalosinskii Turpaeva, 1971 | Ascorhynchus losinalosinskii | 19 |
| Ammothea magniceps Thomson, 1884 | Ammothea magniceps | 19 |
| Paranymphon magnidigitatum Hong & Kim, 1987 | Paranymphon magnidigitatum | 19 |
| Heterofragilia major Stock, 1986 | Heterofragilia major | 19 |
| Ammothea makara Clark, 1977 | Ammothea makara | 19 |
| Tanystylum malpelensis Child, 1979 | Tanystylum malpelensis | 19 |
| Hedgpethius mamillatus Child, 1982 | Hedgpethius mamillatus | 19 |
| Ammothella marcusi Hedgpeth, 1948 | Ammothella marcusi | 19 |
| Ascorhynchus mariae Turpaeva, 1971 | Ascorhynchus mariae | 19 |
| Achelia megacephala Hodgson, 1915 | Achelia megacephala | 87394 |
| Nymphopsis melidae Sawaya, 1947 | Nymphopsis melidae | 19 |
| Ascorhynchus melwardi Flynn, 1929 | Ascorhynchus melwardi | 19 |
| Ammothella menziesi Hedgpeth, 1951 | Ammothella menziesi | 19 |
| Cilunculus mergus Bamber, 2004 | Cilunculus mergus | 1852 |
| Ammothea meridionalis Hodgson, 1915 | Ammothea meridionalis | 19 |
| Ascorhynchus meteor Müller, 1989 | Ascorhynchus meteor | 19 |
| Tanystylum mexicanum Child, 1979 | Tanystylum oculospinosum | 19 |
| Hemichela micrasterias Stock, 1954 | Hemichela micrasterias | 19 |
| Ascorhynchus miniscapus Stock, 1993 | Ascorhynchus miniscapus | 19 |
| Ascorhynchus minutus Hoek, 1881 | Ascorhynchus minutus | 19 |
| Cilunculus misesetosus Turpaeva, 2005 | Cilunculus misesetosus | 3477 |
| Achelia mixta Stock, 1994 | Achelia mixta | 19 |
| Ammothella monotuberculata Hong & Kim, 1987 | Ammothella rostrata | 19 |
| Eurycyde muricata Child, 1995 | Eurycyde muricata | 19 |
| Nymphopsis muscosa Loman, 1908 | Nymphopsis muscosa | 19 |
| Tanystylum neorhetum Marcus, 1940 | Tanystylum neorhetum | 19 |
| Achelia neotenica Krapp, 1986 | Achelia neotenica | 19 |
| Tanystylum nesiotes Child, 1970 | Tanystylum nesiotes | 19 |
| Ammothella nimia Stock, 1991 | Ammothella nimia | 19 |
| Tanystylum oculospinosum Hilton, 1939 | Tanystylum oculospinosum | 2117 |
| Tanystylum oedinotum Loman, 1923 | Tanystylum oedinotum | 19 |
| Ascorhynchus okai Nakamura & Child, 1983 | Ascorhynchus okai | 19 |
| Ammothella omanensis Stock, 1992 | Ammothella omanensis | 19 |
| Tanystylum orbiculare Wilson, 1878 | Tanystylum orbiculare | 19 |
| Tanystylum ornatum Flynn, 1928 | Tanystylum ornatum | 19 |
| Achelia orpax Nakamura & Child, 1983 | Achelia orpax | 19 |
| Ascorhynchus orthorhynchus Hoek, 1881 | Ascorhynchus orthorhynchus | 19 |
| Ascorhynchus orthostomum Child, 1998 | Ascorhynchus orthostomum | 9 |
| Achelia oshimai Utinomi, 1954 | Achelia oshimai | 19 |
| Ammothella ovalis Stock, 1994 | Ammothella ovalis | 19 |
| Ammothea ovatoides Stock, 1973 | Ammothea ovatoides | 19 |
| Ascorhynchus ovicoxa Stock, 1975 | Ascorhynchus ovicoxa | 19 |
| Ammothea ovosetosa Hilton, 1942 | Achelia ovosetosa | 2153 |
| Ammothella pacifica Hilton, 1942 | Ammothella pacifica | 19 |
| Ammothella panamensis Child, 2004 | Ammothella panamensis | 2090 |
| Tanystylum papuensis Child, 1996 | Tanystylum papuensis | 19 |
| Ammothella paradisiaca Loman 1923 | Ammothella paradisiaca | 19 |
| Ascorhynchus pararmatus Stock, 1975 | Ascorhynchus pararmatus | 19 |
| Ascorhynchus parvituberculatus Stock, 1953 | Ascorhynchus parvituberculatus | 19 |
| Ascorhynchus paxillum Child, 1992 | Ascorhynchus paxillum | 3477 |
| Cilunculus pedatus Stock, 1991 | Cilunculus pedatus | 19 |
| Cilunculus perspicax Loman, 1908 | Cilunculus perspicax | 19 |
| Ascorhynchus petilus Child, 1996 | Ascorhynchus petilus | 19 |
| Tanystylum philippinensis Child, 1988 | Tanystylum philippinensis | 19 |
| Ascorhynchus pilipes Stock, 1991 | Ascorhynchus pilipes | 19 |
| Ammothella pilosa Losina-Losinsky, 1961 | Ammothella pilosa | 19 |
| Eurycyde platyspina Stock, 1992 | Eurycyde platyspina | 19 |
| Scipiolus plumosus Loman, 1908 | Scipiolus plumosus | 19 |
| Austroraptus polaris Hodgson, 1907 | Austroraptus polaris | 19 |
| Austroraptus praecox Calman, 1915 | Austroraptus praecox | 19 |
| Ammothea pribilofensis Cole, 1904 | Achelia pribilofensis | 2153 |
| Ammothea profunda Losina-Losinsky, 1961 | Ammothea profunda | 19 |
| Ammothella prolixa Child, 1990 | Ammothella prolixa | 19 |
| Ascorhynchus prosus Nakamura & Child, 1983 | Ascorhynchus prosus | 19 |
| Ammothea pseudospinosa Cano & López-González, 2013 | Ammothea pseudospinosa | 3477 |
| Ascorhynchus pudicus Stock, 1970 | Ascorhynchus pudicus | 19 |
| Ascorhynchus pyrginospinum McCloskey, 1967 | Ascorhynchus pyrginospinum | 19 |
| Eurycyde raphiaster Loman, 1912 | Eurycyde raphiaster | 19 |
| Tanystylum rehderi Child, 1970 | Tanystylum rehderi | 19 |
| Ammothella rostrata Losina-Losinsky, 1961 | Ammothella rostrata | 19 |
| Ammothella rotundata Child, 1988 | Ammothella rotundata | 19 |
| Ammothella rugulosa Verrill, 1900 | Ammothella rugulosa | 19 |
| Achelia salebrosa Losina-Losinsky, 1961 | Achelia salebrosa | 19 |
| Achelia sawayai Marcus, 1940 | Achelia sawayai | 19 |
| Achelia scabra Wilson, 1880 | Achelia scabra | 19 |
| Cilunculus scaurus Stock, 1997 | Cilunculus scaurus | 1852 |
| Ammothella schmitti Child, 1970 | Ammothella schmitti | 19 |
| Tanystylum scrutator Stock, 1954 | Tanystylum scrutator | 19 |
| Achelia segmentata Utinomi, 1954 | Achelia segmentata | 19 |
| Cilunculus sekiguchii Nakamura & Child, 1983 | Cilunculus sekiguchii | 19 |
| Ascorhynchus serratus Hedgpeth, 1948 | Ascorhynchus serratus | 19 |
| Eurycyde sertula Child, 1991 | Eurycyde sertula | 19 |
| Ascorhynchus seticauda Stock, 1991 | Ascorhynchus seticauda | 19 |
| Ammothella setosa Hilton, 1942 | Ammothella setosa | 19 |
| Eurycyde setosa Child, 1988 | Eurycyde setosa | 19 |
| Cilunculus sewelli Calman, 1938 | Cilunculus sewelli | 19 |
| Ammothea sexarticulata Munilla, 1989 | Ammothea sexarticulata | 19 |
| Ammothea sextarticulata Munilla, 1991 | Ammothea sextarticulata | 3477 |
| Achelia sheperdi Stock, 1973 | Achelia sheperdi | 19 |
| Austroraptus sicarius Fry & Hedgpeth, 1969 | Austroraptus sicarius | 19 |
| Ascorhynchus simile Fage, 1942 | Ascorhynchus simile | 19 |
| Achelia simplex Giltay, 1934 | Achelia simplex | 19 |
| Ascorhynchus simplex Nakamura & Child, 1991 | Ascorhynchus simplex | 19 |
| Tanystylum sinoabductus Bamber, 1992 | Tanystylum sinoabductus | 19 |
| Ascorhynchus somaliensis Stock, 1994 | Ascorhynchus somaliensis | 19 |
| Achelia spatula Nakamura & Child, 1983 | Achelia spatula | 19 |
| Ammothea spicula Nakamura & Child, 1983 | Ammothea spicula | 19 |
| Cilunculus spinicristus Child, 1987 | Cilunculus spinicristus | 19 |
| Ammothella spinifera Cole, 1904 | Ammothella spinifera | 19 |
| Achelia spinosa Wilson, 1878 | Achelia spinosa | 19 |
| Eurycyde spinosa Hilton, 1916 | Eurycyde spinosa | 19 |
| Ammothella spinosissima Hall, 1911 | Nymphopsis spinosissima | 1842 |
| Paranymphon spinosum Caullery, 1896 | Paranymphon spinosum | 19 |
| Scipiolus spinosus Utinomi, 1955 | Scipiolus spinosus | 19 |
| Ammothella stauromata Child, 1982 | Ammothella stauromata | 19 |
| Ammothella stocki Clark, 1963 | Ammothella stocki | 19 |
| Ascorhynchus stocki Hong & Kim, 1987 | Ascorhynchus stocki | 19 |
| Ammothea striata Mobius, 1902 | Ammothea striata | 1669 |
| Nymphon styligerum Miers, 1875 | Tanystylum styligerum | 88980 |
| Ammothea stylirostris Gordon, 1932 | Ammothea stylirostris | 19 |
| Achelia sufflata Gordon, 1944 | Achelia sufflata | 19 |
| Ammothea superba Loman, 1911 | Achelia superba | 2153 |
| Ammothella symbia Child, 1979 | Ammothella symbia | 19 |
| Nymphonella tapetis Ohshima, 1927 | Nymphonella tapetis | 19 |
| Achelia tenuipes Stock, 1990 | Achelia tenuipes | 19 |
| Ascorhynchus tenuirostris Carpenter, 1892 | Ascorhynchus tenuirostris | 19 |
| Ammothea tetrapora Gordon, 1932 | Ammothea tetrapora | 19 |
| Sericosura thermophilus Turpaeva, 1988 | Ammothea verenae | 19 |
| Ammothella thetidis Clark, 1963 | Ammothella thetidis | 19 |
| Ammothea tibialis Munilla-Leon, 2002 | Ammothea tibialis | 19 |
| Ammothella tippula Child, 1983 | Ammothella tippula | 19 |
| Achelia transfuga Stock, 1954 | Achelia transfuga | 19 |
| Achelia transfugoides Stock, 1973 | Achelia transfugoides | 19 |
| Hedgpethius tridentatus Child, 1974 | Hedgpethius tridentatus | 19 |
| Acheliana tropicalis Arnaud, 1971 | Acheliana tropicalis | 19 |
| Ammothella tuberculata Cole, 1904 | Ammothella tuberculata | 19 |
| Boehmia tuberosa Mobius, 1902 | Boehmia tuberosa | 19 |
| Ascorhynchus tuberosus Utinomi, 1962 | Ascorhynchus tuberosus | 19 |
| Ammothella tubicen Stock, 1978 | Ammothella tubicen | 19 |
| Cilunculus tubicinis Child, 1982 | Cilunculus tubicinis | 19 |
| Proboehmia tubirostris Stock, 1991 | Proboehmia tubirostris | 19 |
| Tanystylum tubirostrum Stock, 1954 | Tanystylum oculospinosum | 19 |
| Tanystylum tubirostrum Stock, 1954 | Tanystylum duospinum | 19 |
| Achelia turba Stock, 1990 | Achelia turba | 19 |
| Ascorhynchus turritus Stock, 1978 | Ascorhynchus turritus | 19 |
| Tanystylum ulreungum Kim, 1983 | Tanystylum ulreungum | 19 |
| Bathyzetes umbrella Bamber, 2004 | Bathyzetes umbrella | 1852 |
| Eurycyde unispina Stock, 1986 | Eurycyde unispina | 19 |
| Ammothea uru Clark, 1977 | Ammothea uru | 19 |
| Achelia uschakovi Losina-Losinsky, 1933 | Achelia uschakovi | 19 |
| Ascorhynchus utinomii Nakamura & Child, 1982 | Ascorhynchus utinomii | 19 |
| Scipiolus validus Stock, 1957 | Scipiolus validus | 19 |
| Ammothella vanninii Stock, 1982 | Ammothella vanninii | 19 |
| Nymphopsis varipes Stock, 1962 | Nymphopsis varipes | 19 |
| Sericosura venticola Child, 1987 | Sericosura venticola | 19 |
| Ammothea verenae Child, 1987 | Ammothea verenae | 2157 |
| Chonothea verrucosa Nakamura & Child, 1991 | Chonothea verrucosa | 19 |
| Ascorhynchus verrucosus Stock, 1991 | Ascorhynchus verrucosus | 19 |
| Ammothea victoriae Cano & López-González, 2007 | Ammothea victoriae | 3477 |