Actinonema Cobb, 1920 (original description)
Actinonema pachydermatum Cobb, 1920 (original description)
Alaimella Cobb, 1920 (original description)
Alaimella cincta Cobb, 1920 (original description)
Bolbolaimus Cobb, 1920 (original description)
Catalaimus Cobb, 1920 accepted as Calyptronema Marion, 1870 (original description)
Ceramonema Cobb, 1920 (original description)
Cyartonema Cobb, 1920 (original description)
Daptonema Cobb, 1920 (original description)
Gammanema Cobb, 1920 (original description)
Gonionchus Cobb, 1920 (original description)
Gonionchus villosus Cobb, 1920 (original description)
Leptonemella Cobb, 1920 (original description)
Nannolaimus Cobb, 1920 (original description)
Nudora Cobb, 1920 (original description)
Paramonohystera pellucida (Cobb, 1920) (original description)
Pseudonchus Cobb, 1920 (original description)
Ptycholaimellus Cobb, 1920 (original description)
Rhabdocoma Cobb, 1920 (original description)
Rhabdocoma americana Cobb, 1920 (original description)
Rhadinema Cobb, 1920 (original description)
Rhadinema flexile Cobb, 1920 (original description)
Rhips Cobb, 1920 (original description)
Rhips ornata Cobb, 1920 (original description)
Rhynchonema Cobb, 1920 (original description)
Synodontium Cobb, 1920 (original description)
Theristus proprius Lorenzen, 1972 accepted as Daptonema proprium (Lorenzen, 1972) Lorenzen, 1977 (basis of record)
Trissonchulus Cobb, 1920 (original description)
Tycnodora Cobb, 1920 accepted as Halalaimus de Man, 1888 (original description)
Xyala Cobb, 1920 (original description)
Xyala striata Cobb, 1920 (original description)
Ypsilon Cobb, 1920 accepted as Deontolaimus de Man, 1880 (original description)
Ypsilon exile Cobb, 1920 accepted as Deontolaimus exilis (Cobb, 1920) Holovachov & Boström, 2015 (original description)
Zalonema Cobb, 1920 (original description)

Atlantic Coast of United States of America for Rhadinema flexile Cobb, 1920