Leptosomatidae Filipjev, 1916
Leptosomatum abyssale Chitwood, 1936
Leptosomatum acephalatum Chitwood, 1936
Leptosomatum arcticum Filipjev, 1916
Leptosomatum australe
Leptosomatum bacillatum (Eberth, 1863)
Leptosomatum bathybium Allgen, 1954
Leptosomatum behringicum
Leptosomatum breviceps Platonova, 1967
Leptosomatum caecum Ditlevsen, 1923
Leptosomatum clavatum Platonova, 1958
Leptosomatum crassicutis
Leptosomatum diversum
Leptosomatum elongatum Bastian, 1865
Leptosomatum filipjevi Schuurmans Stekhoven, 1950
Leptosomatum gracile Bastian, 1865
Leptosomatum grebnickii
Leptosomatum groenlandicum Allgén, 1954
Leptosomatum indicum Stewart, 1914
Leptosomatum keiense
Leptosomatum kerguelense Platonova, 1958
Leptosomatum longisetosum Stekhoven, 1943
Leptosomatum longissimum (Ebert, 1863)
Leptosomatum micoletzkyi Inglis, 1971
Leptosomatum microlaimum Allgen, 1957
Leptosomatum pedroense Allgen, 1947
Leptosomatum punctatum (Eberth, 1863)
Leptosomatum ranjhai
Leptosomatum sabangense Steiner, 1915
Leptosomatum sabangensis
Leptosomatum sachalinensis
Leptosomatum subulatum (Eberth, 1863)
Leptosomatum tetrophthalmum Ssaweljev, 1912
Leptosomatum woodsi
