Actinonema Cobb, 1920 (original description)
Alaimella Cobb, 1920 (original description)
Alaimonema Cobb, 1920 (original description)
Amphispira Cobb, 1920 accepted as Desmodora de Man, 1889 (original description)
Anaxonchium Cobb, 1920 accepted as Pomponema Cobb, 1917 (original description)
Anoncholaimus Cobb, 1920 (original description)
Anticyathus Cobb, 1920 (original description)
Anticyclus Cobb, 1920 (original description)
Antomicron Cobb, 1920 (original description)
Aphelenchulus Cobb, 1920 (original description)
Apodontium Cobb, 1920 (original description)
Asymmetrella Cobb, 1920 (original description)
Axonchium Cobb, 1920 (original description)
Blattophila Cobb, 1920 (original description)
Bolbinium Cobb, 1920 (original description)
Bolbolaimus Cobb, 1920 (original description)
Bolbonema Cobb, 1920 (original description)
Campydora Cobb, 1920 (original description)
Campylaimus Cobb, 1920 (original description)
Catalaimus Cobb, 1920 (original description)
Catanema Cobb, 1920 (original description)
Cephalobellus Cobb, 1920 (original description)
Cephalobium Cobb, 1920 (original description)
Ceramonema Cobb, 1920 (original description)
Chambersiella Cobb, 1920 (original description)
Choronema Cobb, 1920 (original description)
Cinctonema Cobb, 1920 (original description)
Coinonema Cobb, 1920 accepted as Araeolaimus de Man, 1888 (original description)
Colpurella Cobb, 1920 (original description)
Cophonchus Cobb, 1920 accepted as Phanoderma Bastian, 1865 (original description)
Croconema Cobb, 1920 (original description)
Crystallonema Cobb, 1920 accepted as Paralinhomoeus de Man, 1907 accepted as Linhomoeus Bastian, 1865 (original description)
Cyartonema Cobb, 1920 (original description)
Cynura Cobb, 1920 (original description)
Cytolaimium Cobb, 1920 (original description)
Dactylaimus Cobb, 1920 (original description)
Daptonema Cobb, 1920 (original description)
Dasynema Cobb, 1920 accepted as Dasynemella Cobb, 1933 (original description)
Didelta Cobb, 1920 (original description)
Digitonchus Cobb, 1920 accepted as Deontolaimus de Man, 1880 (original description)
Doryllium Cobb, 1920 (original description)
Gammanema Cobb, 1920 (original description)
Gonionchus Cobb, 1920 (original description)
Halanonchus Cobb, 1920 (original description)
Halinema Cobb, 1920 (original description)
Hyalaimus Cobb, 1920 (original description)
Illium Cobb, 1920 (original description)
Ionema Cobb, 1920 (original description)
Iotadorus Cobb, 1920 accepted as Hypodontolaimus de Man, 1886 (original description)
Iotalaimus Cobb, 1920 (original description)
Iotonchium Cobb, 1920 (original description)
Ironella Cobb, 1920 (original description)
Isolaimium Cobb, 1920 (original description)
Isonemella Cobb, 1920 accepted as Symplocostoma Bastian, 1865 (original description)
Laimella Cobb, 1920 (original description)
Laxonema Cobb, 1920 (original description)
Leptogastrella Cobb, 1920 accepted as Paramonohystera Steiner, 1916 (original description)
Leptonchus Cobb, 1920 (original description)
Leptonemella Cobb, 1920 (original description)
Linhomoella Cobb, 1920 (original description)
Litinium Cobb, 1920 (original description)
Litonema Cobb, 1920 (original description)
Litotes Cobb, 1920 (original description)
Margonema Cobb, 1920 (original description)
Mesodorus Cobb, 1920 accepted as Chromaspirina Filipjev, 1918 (original description)
Mesonchium Cobb, 1920 accepted as Dorylaimopsis Ditlevsen, 1918 (original description)
Micromicron Cobb, 1920 accepted as Pseudochromadora Daday, 1899 (original description)
Monhystrium Cobb, 1920 (original description)
Myctolaimus Cobb, 1920 (original description)
Myolaimus Cobb, 1920 (original description)
Nannolaimus Cobb, 1920 (original description)
Nemanema Cobb, 1920 (original description)
Nemella Cobb, 1920 accepted as Ionema Cobb, 1920 (original description)
Neurella Cobb, 1920 (original description)
Nudora Cobb, 1920 (original description)
Omicronema Cobb, 1920 (original description)
Onchium Cobb, 1920 (original description)
Onchulella Cobb, 1920 accepted as Onchium Cobb, 1920 (original description)
Onchulus Cobb, 1920 (original description)
Pepsonema Cobb, 1920 accepted as Mesonchium Cobb, 1920 accepted as Dorylaimopsis Ditlevsen, 1918 (original description)
Polylaimium Cobb, 1920 accepted as Leptolaimus de Man, 1876 (original description)
Polysigma Cobb, 1920 (original description)
Porocoma Cobb, 1920 (original description)
Protrellus Cobb, 1920 (original description)
Pseudolella Cobb, 1920 (original description)
Pseudonchus Cobb, 1920 (original description)
Ptycholaimellus Cobb, 1920 (original description)
Pycnolaimus Cobb, 1920 accepted as Wilsonema Cobb, 1913 (original description)
Rhabdocoma Cobb, 1920 (original description)
Rhadinema Cobb, 1920 (original description)
Rhinema Cobb, 1920 (original description)
Rhips Cobb, 1920 (original description)
Rhynchonema Cobb, 1920 (original description)
Schistodera Cobb, 1920 accepted as Oxystomina Filipjev, 1921 (original description)
Stilbonema Cobb, 1920 (original description)
Synodontium Cobb, 1920 (original description)
Synonchium Cobb, 1920 (original description)
Synonema Cobb, 1920 (original description)
Thoonchus Cobb, 1920 (original description)
Thoönchus Cobb, 1920 accepted as Thoonchus Cobb, 1920 (original description)