Synonchium
Synonchium Cobb, 1920 (ref. ID; 3571)
Chromadorida Filipjev, 1929: Family Selachinematidae Cobb, 1915 (ref. ID; 3571)
ref. ID; 3571
Type species
Synonchium obtusum Cobb, 1920 (ref. ID; 3571)
- Synonchium depressum Gerlach, 1954 (ref. ID; 3571)
- Synonchium obtusum Cobb, 1920 (ref. ID; 3571)
- Synonchium pacificum Yeates, 1967 (ref. ID; 3571)