Three new species of free-living marine nematodes: Oncholaimus multisetosus sp. nov., Sabatieria
stenocephalus sp. nov. and Setosabatieria coomansi sp. nov. from the Yellow Sea, China are described and
illustrated. The male of Oncholaimus multisetosus sp. nov. is characterized by a tail sharply constricted at the
junction of the conical and cylindrical sections; two circles of 12-15 pairs of circumcloacal setae each. In
the female, the conical section of the tail gradually tapers in a cylindrical section. Sabatieria stenocephalus sp. nov. is characterized by the pronounced sharp-pointed anterior body, sclerotized tooth-like front edge of
buccal cavity and 15 tubular-shaped precloacal supplements with the posterior five more closely spaced.
Setosabatieria coomansi sp. nov. can be separated from the other species of the genus by the number (6-8) of
cervical setae per ¢le, the number of precloacal supplements (15) and the absence of central strips in
spicules and leaf-like extensions of the cuticle lateral to the cloaca. Types are deposited in the College of
Marine Life Sciences, Ocean University of China.