(Cylichna) (Cylichna) is a biological genus in the family Cylichnidae and order Cephalaspidea.
Cylichna occulta
Cylichna attanosa
Cylichna attonsa
Cylichna consobrina
Cylichna crebripunctata
Cylichna cylindracea
Cylichna discus
Cylichna fantasma
Cylichna gouldii
Cylichna obscura
Cylichna oryza
Cylichna ovata
Cylichna verrilli
Cylichna vortex
Diaphana lottae
Cylichna eburnea
Cylichna nucleolus
Cylichna linearis
Cylichna diegensis
Cylichna alba
Acteocina
Cylichna
Cylichnella
Meloscaphander
Roxania
Scaphander
Tornatina