Cylichnoidea
Shell of Cylichna lemchei (holotype at MNHN, Paris)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Infraclass:	Euthyneura
Subterclass:	Tectipleura
Order:	Cephalaspidea
Superfamily:	Cylichnoidea H. Adams & A. Adams, 1854
Families
See text
Synonyms
Diaphanoidea Odhner, 1914 (1857)

Cylichnoidea is a superfamily of sea snails or bubble snails, marine gastropod molluscs in the order Cylichnidae, the "chalice bubble snails".^[1]

• Colinatydidae Oskars, Bouchet & Malaquias, 2015
• Cylichnidae H. Adams & A. Adams, 1854
• Diaphanidae Odhner, 1914 (1857)
• Eoscaphandridae Chaban & Kijashko, 2016
• Mnestiidae Oskars, Bouchet & Malaquias, 2015

Taxon inquirendum

• Notodiaphanidae Thiele, 1931

Synonyms

• Amphisphyridae Gray, 1857: synonym of Diaphanidae Odhner, 1914 (1857)