FAMILY Microlaimidae Micoletzky, 1922b [rev. Jensen 1978] GENUS Acanthomicrolaimus Stewart & Nicholas, 1987:91 [Type is A. jenseni] SPECIES Acanthomicrolaimus jenseni Stewart & Nicholas, 1987:91 GENUS Aponema Jensen, 1978:165 [Type is Microlaimus torosus Lorenzen 1973] SPECIES Aponema decraemerae Muthumbi & Vincx, 1999:40 SPECIES Aponema mnazi Muthumbi & Vincx, 1999:42 SPECIES Aponema nympha Bussau & Vopel, 1999:407 [Peru Basin] SPECIES Aponema papillatum Pastor, 1980:4 TYPE SPECIES Aponema torosus (Lorenzen, 1973) [ Redescription; Jensen 1978 p.169] [=Microlaimus torosus Lorenzen, 1973] GENUS Bathynox Bussau & Vopel, 1999:416 [Type is Bathynox clavata] SPECIES Bathynox clavata Bussau & Vopel, 1999:417 [Peru Basin] GENUS Bolbolaimus Cobb, 1920 [=Pseudomicrolaimus Sergeeva, 1976] [syn. Jensen 1978 p.162] SPECIES Bolbolaimus abebei Muthumbi & Vincx, 1999:45 SPECIES Bolbolaimus bahari Muthumbi & Vincx, 1999:44 SPECIES Bolbolaimus chitwoodi (Gerlach, 1950) [syn. Jensen 1978 p.162] [=Microlaimus chitwoodi Gerlach, 1950] [=Microlaimus dentatus Chitwood, 1937] [praeocc.] SPECIES Bolbolaimus crassiceps (Gerlach, 1953) [syn. Jensen 1978 p.162] [=Microlaimus crassiceps Gerlach, 1953] SPECIES Bolbolaimus longosetosus (Jensen, 1985) [syn. Muthumbi, Verschelde & Vincx 1996 p.182] [=Chromaspirina longosetosus Jensen, 1985] SPECIES Bolbolaimus riemanni Jensen, 1978:162 SPECIES Bolbolaimus teutonicus (Riemann, 1966) [syn. Jensen 1978 p.162] [=Microlaimus teutonicus Riemann, 1966] SPECIES Bolbolaimus wieseri (Hopper, 1961) [syn. Jensen 1978 p.162] [=Microlaimus wieseri Hopper, 1961] GENUS Caligocanna Bussau & Vopel, 1999:409 [Type is Caligocanna mirabilis] SPECIES Caligocanna mirabilis Bussau & Vopel, 1999:409 [Peru Basin] GENUS Cinctonema Cobb, 1920:738 SPECIES Cinctonema papillatum Timm, 1962 SPECIES Cinctonema polaris (Cobb, 1914) [polare?; syn. Timm 1978 p.241] [=Terschellingia polaris Cobb, 1914] SPECIES Cinctonema tenue Cobb, 1920 GENUS Crassolaimus Kreis, 1929a SPECIES Crassolaimus bipapilattus Wieser, 1951 SPECIES Crassolaimus conicaudatus Kreis, 1929 GENUS Ixonema Lorenzen, 1971a SPECIES Ixonema deleyi Muthumbi & Vincx, 1999:48 SPECIES Ixonema powelli Jensen, 1985:261 SPECIES Ixonema sordidium Lorenzen, 1971 GENUS Microlaimus de Man, 1880a SUBGENUS Microlaimoides Hoeppli, 1926:242 [not M. lingi Hoeppli & Chu 1932 ?] SUBGENUS Microlaimus de Man, 1880a [=Calomicrolaimus Lorenzen, 1976] [syn. of Microlaimus by Kovalyev & Tchesunov 2005 p.3] SPECIES Microlaimus acanthus (Jayasree & Warwick, 1977) [syn. Jensen 1978 p.164] [=Paramicrolaimus acanthus Jayasree & Warwick, 1977] SPECIES Microlaimus acicularis Lorenzen, 1976 SPECIES Microlaimus acinaces Warwick & Platt, 1973 [Redescription; Jensen 1978 p.167] SPECIES Microlaimus acuticaudatus Stekhoven & De Coninck, 1933 [Gerlach & Riemann 1973] SPECIES Microlaimus aequisetosus Blome, 1982:97 SPECIES Microlaimus affinis Gerlach, 1958 [Gerlach & Riemann 1973] SPECIES Microlaimus africanensis Furstenberg & Vinex, 1992:247 SPECIES Microlaimus allgeni Gerlach, 1950 [Gerlach & Riemann 1973] SPECIES Microlaimus arenarius (Blome, 1982):91 [syn. Kovalyev & Tchesunov 2005 p.4] [=Calomicrolaimus arenarius Blome, 1982] SPECIES Microlaimus arenicola Schulz, 1938 [Description; Blome 1982 p.99] SPECIES Microlaimus borealis Steiner, 1916 [Gerlach & Riemann 1973] SPECIES Microlaimus capillaris Gerlach, 1957 SPECIES Microlaimus clancularius Bussau & Vopel, 1999:415 [Peru Basin] SPECIES Microlaimus cochleatus Wieser, 1959 [Gerlach & Riemann 1973] SPECIES Microlaimus compridus Gerlach, 1956 [Description; Gourbault & Vincx 1988 p.41] SPECIES Microlaimus conothelis (Lorenzen, 1973) [syn. Jensen 1978 p.167; Diagnostic; Kovalyev & Tchesunov 2005 p.13] [=Paramicrolaimus conothelis Lorenzen, 1973] SPECIES Microlaimus copulatus Jensen, 1988:151 SPECIES Microlaimus criminalis Rieger & Ott, 1971 [Gerlach & Riemann 1973] SPECIES Microlaimus cyatholaimoides de Man, 1922 [Gerlach & Riemann 1973; Redescription; Bussau 1990 p.174] SPECIES Microlaimus decoratus Pastor-de Ward, 1991:5 SPECIES Microlaimus dentatus Allgén, 1935 [Gerlach & Riemann 1973] SPECIES Microlaimus dimorphus Chitwood, 1937 [Gerlach & Riemann 1973] SPECIES Microlaimus discolensis Bussau & Vopel, 1999:411 [Peru Basin] SPECIES Microlaimus dixiei Wieser, 1959 [Gerlach & Riemann 1973] SPECIES Microlaimus donsi Allgén, 1935 [Gerlach & Riemann 1973] SPECIES Microlaimus falklandiae Allgén, 1959 [Gerlach & Riemann 1973] SPECIES Microlaimus fluviatilis Cobb, 1914 [Gerlach & Riemann 1973] SPECIES Microlaimus formosus Gerlach, 1957 [Gerlach & Riemann 1973] SPECIES Microlaimus gerlachi Wieser, 1954 [Gerlach & Riemann 1973] TYPE SPECIES Microlaimus globiceps de Man, 1880 [ Redescription; Turpeenniemi 1997 p.37] SPECIES Microlaimus honestoides Meyl, 1954 [Gerlach & Riemann 1973] SPECIES Microlaimus honestus de Man, 1922 [Redescription; Jensen 1979 p.155] SPECIES Microlaimus inermis Ditlevsen, 1923 [Gerlach & Riemann 1973] SPECIES Microlaimus jenseni (Muthumbi & Vincx, 1999):47 [=Calomicrolaimus jenseni Muthumbi & Vincx, 1999] SPECIES Microlaimus kaurii Wieser, 1954 [Gerlach & Riemann 1973] SPECIES Microlaimus latilaimus Allgén, 1959 [Gerlach & Riemann 1973] SPECIES Microlaimus limnophilus Turpeenniemi, 1997:40 SPECIES Microlaimus luneatus (Wieser & Hopper, 1967) [syn. Jensen 1978 p.167] [=Paramicrolaimus luneatus Wieser & Hopper, 1967] SPECIES Microlaimus macrocirculus Gerlach, 1950 [Gerlach & Riemann 1973] SPECIES Microlaimus macrolaimus Allgén, 1947 [Gerlach & Riemann 1973] SPECIES Microlaimus marinus (Schulz, 1932) [Stekhoven & De Coninck 1933] [=Paracothonolaimus marinus Schulz, 1932] SPECIES Microlaimus microseta Gerlach, 1953 [Gerlach & Riemann 1973] SPECIES Microlaimus minutus Muthumbi & Vincx, 1999:54 SPECIES Microlaimus monstrosus Gerlach, 1953 [Gerlach & Riemann 1973] [=Microlaimus conspicuus Lorenzen, 1973] [syn. Vincx 1981 p.444] SPECIES Microlaimus naidinae Platonova, 1978:508 SPECIES Microlaimus nanus Blome, 1982:101 SPECIES Microlaimus oblongilaimus Gerlach, 1955 [Gerlach & Riemann 1973] SPECIES Microlaimus ostracion Stekhoven, 1935 [Gerlach & Riemann 1973] SPECIES Microlaimus papillatus (Gerlach, 1956) [syn. Jensen 1978 p.167] [=Paramicrolaimus papillatus Gerlach, 1956] SPECIES Microlaimus papilliferus Allgén, 1959 [Gerlach & Riemann 1973] SPECIES Microlaimus paraborealis Allgén, 1940 [Gerlach & Riemann 1973] SPECIES Microlaimus paraconothelis Kovalyev & Tchesunov, 2005:11 [Russia; marine] SPECIES Microlaimus parahonestus Gerlach, 1950 [Gerlach & Riemann 1973] SPECIES Microlaimus pecticauda Murphy, 1966 [Gerlach & Riemann 1973] SPECIES Microlaimus pinguis Wieser, 1954 [Gerlach & Riemann 1973] SPECIES Microlaimus porosus Bussau & Vopel, 1999:413 [Peru Basin] SPECIES Microlaimus problematicus Allgén, 1932 [Gerlach & Riemann 1973] SPECIES Microlaimus punctulatus Gerlach, 1950 [Redescription; Jensen 1978 p.167] SPECIES Microlaimus punctulatus Gerlach, 1950 [Redescription; Jensen 1978 p.167] SPECIES Microlaimus pwani Muthumbi & Vincx, 1999:57 SPECIES Microlaimus pygmaeus Meyl, 1954 [Gerlach & Riemann 1973] SPECIES Microlaimus robustidens Stekhoven & De Coninck, 1933 [Gerlach & Riemann 1973] SPECIES Microlaimus rugatus (Lorenzen, 1976) [syn. Kovalyev & Tchesunov 2005 p.4] [=Calomicrolaimus rugatus Lorenzen, 1976] SPECIES Microlaimus sensus Wieser, 1954 [Gerlach & Riemann 1973] SPECIES Microlaimus setosus Hoeppli, 1926 [Gerlach & Riemann 1973] SPECIES Microlaimus sicarius Wieser, 1954 [Gerlach & Riemann 1973] SPECIES Microlaimus sonmianensis Nasira, Maqbool, Turpeenniemi & Zarina, 2000:2 [Pakistan, Sonmiani & Sandspit beaches] SPECIES Microlaimus spinosus Gerlach, 1957 [Gerlach & Riemann 1973] SPECIES Microlaimus spirifer Warwick, 1970 [Gerlach & Riemann 1973] SPECIES Microlaimus tenuicollis Gerlach, 1952 [Gerlach & Riemann 1973] SPECIES Microlaimus texianus Chitwood, 1951 [Redescription; Muthumbi & Vincx 1999 p.52] SPECIES Microlaimus texianus Chitwood, 1951 [Redescription; Muthumbi & Vincx 1999 p.52] SPECIES Microlaimus undulatus Gerlach, 1953 [Gerlach & Riemann 1973] SPECIES Microlaimus zosterae Allgén, 1930 [Gerlach & Riemann 1973] GENUS Spirobolbolaimus Soetaert & Vincx, 1988:33 [Type is S. bathyalis] SPECIES Spirobolbolaimus bathyalis Soetaert & Vincx, 1988:34 SPECIES Spirobolbolaimus boucherorum Gourbault & Vincx, 1990:31 GENUS Ungulilaimella Allgén, 1958:212 SPECIES Ungulilaimella bulbosa Allgén, 1958 [Gerlach & Riemann 1973]