Acanthonchus Cobb, 1920 (original description)
Actinonema Cobb, 1920 (original description)
Anticyathus Cobb, 1920 (original description)
Anticyclus Cobb, 1920 (original description)
Antomicron Cobb, 1920 (original description)
Apodontium Cobb, 1920 (original description)
Belbolla Andrássy, 1973 (original description)
Bolbolaimus Cobb, 1920 (original description)
Campylaimus Cobb, 1920 (original description)
Campylaimus inaequalis Cobb, 1920 (original description)
Ceramonema Cobb, 1920 (original description)
Cyartonema Cobb, 1920 (original description)
Daptonema Cobb, 1920 (original description)
Didelta Cobb, 1920 (original description)
Gammanema Cobb, 1920 (original description)
Gonionchus Cobb, 1920 (original description)
Halanonchus Cobb, 1920 (original description)
Laimella Cobb, 1920 (original description)
Litinium Cobb, 1920 (original description)
Litinium aequale Cobb, 1920 (original description)
Nannolaimus Cobb, 1920 (original description)
Nemanema Cobb, 1920 (original description)
Polysigma Cobb, 1920 (original description)
Pseudolella Cobb, 1920 (original description)
Pseudonchus Cobb, 1920 (original description)
Rhabdocoma Cobb, 1920 (original description)
Rhadinema Cobb, 1920 (original description)
Rhips Cobb, 1920 (original description)
Rhynchonema Cobb, 1920 (original description)
Synodontium Cobb, 1920 (original description)
Synonchium Cobb, 1920 (original description)
Trissonchulus Cobb, 1920 (original description)
Xyala Cobb, 1920 (original description)
Xyala striata Cobb, 1920 (original description)
Zalonema Cobb, 1920 (original description)

 Biology

 for Monhystrium transitans Cobb, 1920

Commensal species. In land crabs. [details]

 Biology

 for Monhystrium wilsoni (Baylis, 1915) Cobb, 1920

Commensal species. In land crabs. [details]

 Distribution

 for Apodontium pacificum Cobb, 1920

Mollendo and Salaveny, coast of Peru, S. A.. [details]