Cylichnidae

Cylichnidae, common name the "chalice bubble snails" or "canoe bubble snails" is a family of sea snails or bubble snails, marine gastropod mollusks in the superfamily Cylichnoidea.

2005 taxonomy
This family has been classified within the clade Cephalaspidea, itself belonging to the informal group Opisthobranchia (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). The family Cylichnidae has no subfamilies (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). Synonyms of Cylichnidae has included: Scaphandridae G. O. Sars, 1878; Tornatinidae P. Fischer, 1883; Acteocinidae Dall, 1913 and Triclidae Winckworth, 1932.

2009 taxonomy
Malaquias et al. (2009) have reinstated Scaphandridae as a valid family.

Genera
Genera within the family Cylichnidae include:
 * Adamnestia Iredale, 1936
 * Bogasonia Warén, 1989
 * Cylichna Lovén, 1846 - type genus
 * † Cylichnania Marwick, 1931
 * Cylichnella Gabb, 1873
 * Cylichnoides Minichev, 1977
 * Decorifer Iredale, 1937
 * Mamillocylichna Nordsieck, 1972
 * Paracteocina Minichev, 1966
 * Semiretusa Thiele, 1925
 * Sphaerocylichna Thiele, 1925
 * Toledonia Dall, 1902
 * Truncacteocina Kuroda & Habe, 1955
 * Genera brought into synonymy:
 * Actaeocina [sic]: synonym of Acteocina J. E. Gray, 1847
 * Bullinella Newton, 1891 : synonym of Cylichna Lovén, 1846
 * Clistaxis Cossmann, 1895 : synonym of Cylichna Lovén, 1846
 * Cryptaxis Jeffreys, 1883 : synonym of Cylichna Lovén, 1846
 * Cychlinella [sic]: synonym of Cylichnella Gabb, 1873
 * Cylichlinella [sic]: synonym of Cylichnella Gabb, 1873
 * Cylindrella Swainson, 1840 : synonym of Cylichna Lovén, 1846
 * Didontoglossa Annandale, 1924 : synonym of Tornatina A. Adams, 1850 : synonym of Acteocina Gray, 1847
 * Eocylichna Kuroda & Habe, 1952 : synonym of Cylichna Lovén, 1846
 * Cylichnoides Minichev, 1977 : synonym of Cylichna Lovén, 1846
 * Tornastra Ev. Marcus, 1977 : synonym of Cylichnella Gabb, 1873
 * Tornatina A. Adams in Sowerby, 1850 : synonym of Acteocina Gray, 1847
 * Utriculastra Thiele, 1925 : synonym of Cylichnella Gabb, 1873