Subfamily Selachinematinae Cobb, 1915

Diagnosis

Anterior portion of buccal cavity reduced, posterior portion with three denticulate mandibles (modified rhabdions); dorsal mandible may be reduced.

Valid genera

Cheironchus Cobb, 1917

Demonema Cobb, 1894

Kosswigonema Gerlach, 1964

Synonchiella Cobb, 1933

Synonchium Cobb, 1920