Study of Nematodes (Monhysterida, Araeolaimida, Desmodorida) inhabiting muddy bottoms near Marseilles (Gulf of Lion) between 310 and 650 metres in depth
One new genus is created: Setoplectus (Haliplectidae).
Description of 30 species: 17 are new : Sphaerolaimus glaphyrus. S minutus, S paragracilis, S. profundus, Elzalia mediterranea Steineria longicaudata, Theristus (Cylindrotheristus) acidus, T. (C) paratortus, T (C) planieris, T (C)pseudotortus, T (Pseudotheristus) circulus, Setoplectus gerlachi, Odontophora fatisca, Southerniella allometrica, Desmodora
conica, Spirinia (Perspiria)flagellata, Microlaimus lazonus.
Two new nominations are proposed: Desmodora gerlachi nom. nov. pro Desmodora conocephala Gerlach, 1963 nec Steiner, 1918 and Setoplectus amphibulbosus nom. nov. pro Aegialoalaimus amphibulbosus Gerlach, 1955.