Cylichnoidea form a superfamily of small and medium-sized nudibranches within the order Cephalaspidea.
The current taxonomy according to Bouchet et al. (2017) and accepted by WoRMS is:
- Superfamily Cylichnoidea H. Adams & A. Adams, 1854
- Family Colinatydidae Oskars, Bouchet & Malaquias, 2015
- Genus Colinatys Ortea, Moro & Espinosa, 2013
- Family Cylichnidae H. Adams & A. Adams, 1854
- Genus Adamnestia Iredale, 1936
- Genus Bogasonia Warén, 1989
- Genus Cylichna Lovén, 1846
- Genus Cylichnania Marwick, 1931 †
- Genus Cylichnella Gabb, 1873
- Genus Cylichnoides Minichev, 1977
- Genus Decorifer Iredale, 1937
- Genus Mamillocylichna Nordsieck, 1972
- Genus Paracteocina Minichev, 1966
- Genus Semiretusa Thiele, 1925
- Genus Sphaerocylichna Thiele, 1925
- Genus Toledonia Dall, 1902
- Genus Truncacteocina Kuroda & Habe, 1955
- Family Diaphanidae Odhner, 1914 (1857)
- Subfamily Diaphaninae Odhner, 1914 (1857)
- Genus Diaphana T. Brown, 1827
- Subfamily Diaphaninae Odhner, 1914 (1857)
- Family Eoscaphandridae Chaban & Kijashko, 2016
- Genus Eoscaphander Habe, 1952
- Genus Pseudocylichna Chaban & Kijashko, 2016
- Family Mnestiidae Oskars, Bouchet & Malaquias, 2015
- Genus Mnestia H. Adams & A. Adams, 1854
- Family Colinatydidae Oskars, Bouchet & Malaquias, 2015
Species of Cylichnoidea reported in the Mediterranean or around the Iberian Peninsula:
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