FAMILY Selachinematidae Cobb, 1915a [=Choanolaimidae De Coninck & Stekhoven, 1933a] [=Choniolaimidae Stekhoven & Adam, 1931a] [syn. Lorenzen 1981 p.175] [=Richtersiidae Kreis, 1929] GENUS Cheironchus Cobb, 1917n [=Dignathonema Filipjev, 1918:190] [type is bulbosum = vorax] SPECIES Cheironchus brachyuris Allgén, 1959 [=Dignathonema brachyure Allgén, 1959] SPECIES Cheironchus conicaudatus Tchesunov & Okhlopkov, 2006:25 [USA; praeocc; Florida (marine)] SPECIES Cheironchus conicaudatus Allgén, 1959 [=Dignathonema conicaudatum Allgén, 1959] SPECIES Cheironchus crassus Allgén, 1959 [=Dignathonema crassum Allgén, 1959] [=Dignathonema norvegicum] SPECIES Cheironchus dactylocaudatus Tchesunov & Okhlopkov, 2006:29 [USA; Florida (marine)] SPECIES Cheironchus papillosus Allgén, 1959 [=Dignathonema papillosum Allgén, 1959] SPECIES Cheironchus paravorax Castillo-Fernández & Decraemer, 1993:61 TYPE SPECIES Cheironchus vorax Cobb, 1917n [ Redescription; Castillo Fernandez & Decraemer 1993 p.57] [=Dignathonema bulbosum Filipjev, 1918] [=Cheironchus macramphis Stekhoven, 1950] GENUS Choanolaimus de Man, 1880a TYPE SPECIES Choanolaimus psammophilus de Man, 1880a [ Redescription; Bussau 1990 p.173] [=Halichoanolaimus obtusicaudatus Schulz, 1935] GENUS Choniolaimus Ditlevsen, 1919a [=Bulbopharyngiella Allgén, 1929:491] [type is granulata?] SPECIES Choniolaimus chiliensis Murphy, 1965 SPECIES Choniolaimus crassus Vitiello, 1971 SPECIES Choniolaimus novempapillatus Stekhoven, 1946 SPECIES Choniolaimus panicus Gerlach, 1956 SPECIES Choniolaimus papillatus Ditlevsen, 1918 [=Bulbopharyngiella granulata Allgén, 1929] [=Halichoanolaimus microspiculum Allgén, 1928] [=Dignathonema norvegicum Allgén, 1934] GENUS Cobbionema Filipjev, 1922a SPECIES Cobbionema acrocerca Filipjev, 1922 SPECIES Cobbionema capense Furstenberg & Heyns, 1987:80 SPECIES Cobbionema cylindrilaimoides Stekhoven, 1950 GENUS Demonema Cobb, 1894 SPECIES Demonema rapax Cobb, 1894 [=Selachinema ferox Cobb, 1915] [=Dignathonema mirabile Allgén, 1951] [=Selachinema xarifae Gerlach, 1958] GENUS Gammanema Cobb, 1920a SPECIES Gammanema anthostoma Okhlopkov, 2002:42 SPECIES Gammanema cancellatum Gerlach, 1955 SPECIES Gammanema conicauda Gerlach, 1953 SPECIES Gammanema fennicum Gerlach, 1953 [described by Okhlopkov 2002 p.46; not syn. of rapax by Okhlopkov 2002 p.46] [=Halichoanolaimus fennicus Gerlach, 1953] SPECIES Gammanema kosswigi Gerlach, 1964 SPECIES Gammanema mediterraneum Vitiello, 1970 SPECIES Gammanema paramenzeli (Allgén, 1935) [=Halichoanolaimus paramenzeli Allgén, 1935] SPECIES Gammanema polydonta Murphy, 1965 SPECIES Gammanema rapax (Ssaweljev, 1912) [Gerlach 1964] [=Halichoanolaimus rapax Ssaweljev, 1912] [=Gammanema ferox Cobb, 1920] [=Halichoanolaimus menzelii Ditlevsen, 1918] SPECIES Gammanema smithi Murphy, 1964 GENUS Halichoanolaimus de Man, 1886a [=Smalsundia Allgén, 1929:454] [type is punctata?] SPECIES Halichoanolaimus australis Cobb, 1898 SPECIES Halichoanolaimus balochiensis Turpeenniemi, Nasira & Maqbool, 2001:11 SPECIES Halichoanolaimus chordiurus Gerlach, 1955 [=Halichoanolaimus longissimicauda Timm, 1961] [=Halichoanolaimus nemurus Allgén, 1959] SPECIES Halichoanolaimus conicaudatus Allgén, 1959 SPECIES Halichoanolaimus consimilis Allgén, 1933 [=Halichoanolaimus allgeni Stekhoven, 1950] SPECIES Halichoanolaimus dolichurus Ssaweljev, 1912 [=Halichoanolaimus filicauda Filipjev, 1918] [=Halichoanolaimus labiolaimus Allgén, 1957] [=Halichoanolaimus longicauda Ditlevsen, 1918] SPECIES Halichoanolaimus duodecimpapillatus Timm, 1952 [Diagnostic; Belogurov & Fadeeva 1980 p.658] SPECIES Halichoanolaimus filipjevi Allgén, 1953 SPECIES Halichoanolaimus lanceolatus Vitiello, 1970 SPECIES Halichoanolaimus macramphis Gourbault & Vincx, 1985:93 SPECIES Halichoanolaimus macrophallus Gourbault & Vincx, 1985:91 SPECIES Halichoanolaimus macrospiculatus Hopper, 1961 SPECIES Halichoanolaimus minor Ssaweljev, 1912 [Redescription; Gourbault & Vincx 1985 p.88] SPECIES Halichoanolaimus minutissimus Timm, 1961 SPECIES Halichoanolaimus norvegicus Allgén, 1940 SPECIES Halichoanolaimus ovalis Ditlevsen, 1921 SPECIES Halichoanolaimus possjetiensis Belogurov & Fadeeva, 1980:656 SPECIES Halichoanolaimus quattuordecimpapillata Chitwood, 1951 [Redescription; Decraemer & Coomans 1978 p.535] SPECIES Halichoanolaimus raritanensis Hasbrouck, 1966 SPECIES Halichoanolaimus robustus Bastian, 1865 [de Man 1886] [=Halichoanolaimus clavicauda Filipjev, 1918] [=Halichoanolaimus hinemoae Ditlevsen, 1930] [=Smalsundia punctata Allgén, 1929] [=Spiliphera robusta Bastian, 1865] SPECIES Halichoanolaimus sonorus Belogurov & Fadeeva, 1980:658 SPECIES Halichoanolaimus striatilaimus Allgén, 1959 SPECIES Halichoanolaimus unicus Inglis, 1968 GENUS Kosswigonema Gerlach, 1964a SPECIES Kosswigonema acanthum (Gerlach, 1957) [=Selachinema acanthum Gerlach, 1957] GENUS Latronema Wieser, 1954a SPECIES Latronema aberrans (Allgén, 1934) [=Paracanthonchus aberrans Allgén, 1934] SPECIES Latronema annulatum Gerlach, 1953 [Wieser 1954] [=Synonchiella annulata Gerlach, 1953] SPECIES Latronema botulum Gerlach, 1956 SPECIES Latronema conglobatum Gerlach, 1964 SPECIES Latronema orcinum Gerlach, 1952 [Wieser 1954] [=Synonchiella orcina Gerlach, 1952] SPECIES Latronema piraticum Wieser, 1954 SPECIES Latronema sertatum Wieser, 1959 SPECIES Latronema spinosum Andrássy, 1973 GENUS Nunema N. Cobb in M. Cobb, 1933:90 SPECIES Nunema nanum Cobb, 1933 [Gerlach & Riemann 1973] GENUS Pseudonchus Cobb, 1920a [=Cheilopseudonchus Murphy, 1964b] [type is symmetricus] SPECIES Pseudonchus deconincki Warwick, 1969 [Gerlach & Riemann 1973] [=Pseudonchus decempapillatus Warwick, 1974] SPECIES Pseudonchus donsi Allgén, 1948 [species inquirienda] SPECIES Pseudonchus gerlachi Warwick, 1969 [Gerlach & Riemann 1973] SPECIES Pseudonchus jenseni Murphy, 1964 [Gerlach & Riemann 1973] SPECIES Pseudonchus kosswigi Murphy, 1964 [Gerlach & Riemann 1973] SPECIES Pseudonchus longus Allgén, 1949 [Norway; Gerlach & Riemann 1973] SPECIES Pseudonchus northumbriensis Warwick, 1969 [Gerlach & Riemann 1973] SPECIES Pseudonchus norwegicus Allgén, 1933 [Gerlach & Riemann 1973] SPECIES Pseudonchus pachysetosus Blome, 1982:108 TYPE SPECIES Pseudonchus rotundicephalus Cobb, 1920 [ Gerlach & Riemann 1973] SPECIES Pseudonchus symmetricus De Coninck, 1942 [Gerlach & Riemann 1973] GENUS Pteronium N. Cobb in M. Cobb, 1933:93 SPECIES Pteronium obesum Cobb, 1933 [Gerlach & Riemann 1973] GENUS Richtersia Steiner, 1916 [as Selachinematidae by Andrássy] [=Richtersiella Kreis, 1929:62] [type is tenuis] SPECIES Richtersia bathyalis Soetaert & Vincx, 1987:125 SPECIES Richtersia beauforti Chitwood, 1936 [Gerlach & Riemann 1973] SPECIES Richtersia collaris Steiner, 1916 [Gerlach & Riemann 1973] SPECIES Richtersia coomansi Soetaert & Vincx, 1987:137 SPECIES Richtersia deconincki Vincx, 1981:432 SPECIES Richtersia demani Stekhoven, 1935 [Gerlach & Riemann 1973] SPECIES Richtersia discorda (Inglis, 1968) [Gerlach & Riemann 1973] [=Richtersiella discorda Inglis, 1968] SPECIES Richtersia elongata Stekhoven, 1950 [Gerlach & Riemann 1973] SPECIES Richtersia erinacei Gerlach, 1964 [Gerlach & Riemann 1973] SPECIES Richtersia farcimen Gerlach, 1964 [Gerlach & Riemann 1973] SPECIES Richtersia heipi Soetaert & Vincx, 1987:131 SPECIES Richtersia iberica Riemann & Schrage, 1977:51 [36 degree 01.5 minute N, 06 degree 47.9 minute W] SPECIES Richtersia imparis Gerlach, 1956 [Gerlach & Riemann 1973] SPECIES Richtersia inaequalis Riemann, 1966 [Gerlach & Riemann 1973] SPECIES Richtersia mediterranea Soetaert & Vincx, 1987:135 SPECIES Richtersia norvegica Allgén, 1940 [Gerlach & Riemann 1973] SPECIES Richtersia pilosa (Kreis, 1937) [Gerlach & Riemann 1973] [=Richtersiella pilosa Kreis, 1937] SPECIES Richtersia spinosa Soetaert & Vincx, 1987:128 SPECIES Richtersia staresensis Soetaert & Vincx, 1987:135 SPECIES Richtersia tenuis (Kreis, 1929) [Gerlach & Riemann 1973] [=Richtersiella tenuis Kreis, 1929] GENUS Selachinema Cobb, 1915a SPECIES Selachinema ferox Cobb, 1915 GENUS Synonchiella Cobb, 1933a SPECIES Synonchiella denticulata Cobb, 1933 SPECIES Synonchiella dilarae Fadeeva, 1988:34 SPECIES Synonchiella ferox Cobb, 1933 SPECIES Synonchiella forceps (Gerlach, 1957) [=Trogolaimus forceps Gerlach, 1957] SPECIES Synonchiella hopperi Ott, 1972 SPECIES Synonchiella japonica Fadeeva, 1988:36 SPECIES Synonchiella major Murphy, 1965 SPECIES Synonchiella micramphis (Stekhoven, 1950) [=Trogolaimus micramphis Stekhoven, 1950] SPECIES Synonchiella microspiculoides (Stekhoven, 1946) [=Halichoanolaimus microspiculoides Stekhoven, 1946] SPECIES Synonchiella minor Murphy, 1965 SPECIES Synonchiella minuta Vitiello, 1970 SPECIES Synonchiella riemanni Warwick, 1970 SPECIES Synonchiella roscoffiensis De Coninck, 1965 SPECIES Synonchiella siphonolaimoides (Allgén, 1940) [=Paracanthonchus siphonolaimoides Allgén, 1940] SPECIES Synonchiella spiculora Murphy, 1962 SPECIES Synonchiella truncata Cobb, 1933 GENUS Synonchium Cobb, 1920a SPECIES Synonchium capense Heyns & Swart, 1995:523 SPECIES Synonchium depressum Gerlach, 1954 SPECIES Synonchium mediterraneum Vinciguerra & Orselli, 1997:265 [Siracusa, Portopalo] SPECIES Synonchium obtusum Cobb, 1920 SPECIES Synonchium pacificum Yeates, 1967 SPECIES Synonchium siculum Vinciguerra & Orselli, 1997:267 [Siracusa, Portopalo] GENUS Tridentellia Gerlach & Riemann, 1973:280 [nomen nova] [=Tridentella Filipjev, 1946a] [praeocc.] SPECIES Tridentellia crenopharynx (Filipjev, 1946) [=Tridentella crenopharynx Filipjev, 1946] GENUS Trogolaimus Cobb, 1920a SPECIES Trogolaimus erythrophthalma Schneider, 1906 [Redescription; Jensen 1980 p.281] SPECIES Trogolaimus hiromii (Kito & Nakamura, 2001):112 [Japan, central] [=Chromadorina hiromii Kito & Nakamura, 2001] SPECIES Trogolaimus longispiculum (Pastor-de Ward, 1985):18 [Argentina, Ria Deseado, Embarcadero] [=Chromadorina longispiculum Pastor-de Ward, 1985] SPECIES Trogolaimus salina (Belogurov, 1978):140 [=Chromadorina salina Belogurov, 1978] SPECIES Trogolaimus uniformis Cobb, 1920