Fionoidea

Fionoidea
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Order:	Nudibranchia
Suborder:	Aeolidacea
Superfamily:	Fionoidea; Gray, 1857
Families
	See Families

Fionoidea is a superfamily of nudibranchs, shell-less marine gastropod molluscs or sea slugs, in the suborder Aeolidacea. The families within Fionoidea were shown to be monophyletic on DNA evidence and a re-interpretation of family characteristics was provided.

Families

In 2017, Bouchet and colleagues listed the following families inside Fionoidea:

Family Calmidae Iredale & O’Donoghue, 1923
Family Cuthonellidae M. C. Miller, 1977
Family Cuthonidae Odhner, 1934
Family Eubranchidae Odhner, 1934
Family Fionidae Gray, 1857
Family Lomanotidae Bergh, 1890
Family Pinufiidae Er. Marcus & Ev. Marcus, 1960
Family Tergipedidae Bergh, 1889
Family Trinchesiidae F. Nordsieck, 1972

2025 revision

A 2025 revision of the taxonomy of Aeolidacea by Korshunova and colleagues recognised, based on the results of molecular phylogenetic analysises, the following families in the superfamily Fionoidea:

Family Abronicidae Korshunova, Martynov, Bakken, Evertsen, Fletcher, Mudianta, Saito, Lundin, Schrödl & Picton, 2017
Family Calmidae Iredale & O'Donoghue, 1923
Family Cuthonellidae Miller, 1971
Family Cuthonidae Odhner, 1934
Family Eubranchidae Odhner, 1934
Family Fionidae Gray, 1857
Family Murmaniidae Korshunova, Martynov, Bakken, Evertsen, Fletcher, Mudianta, Saito, Lundin, Schrödl & Picton, 2017
Family Tergipedidae Bergh, 1889
Family Trinchesiidae F. Nordsieck, 1972
Family Xenocratenidae Martynov, Lundin, Picton, Fletcher, Malmber & Korshunova, 2020

References

↑ Gray, J.E. (1857). Guide to the systematic distribution of Mollusca in the British Museum. Part I. [Gastropoda]. London: British Miseum. p. 227. Retrieved 8 August 2026.
1 2 3 Korshunova, Tatiana; Fletcher, Karin; Martynov, Alexander (2025-08-01). "The endless forms are the most differentiated—how taxonomic pseudo-optimization masked natural diversity and evolution: the nudibranch case". Zoological Journal of the Linnean Society. 204 (4). doi:10.1093/zoolinnean/zlaf057. ISSN 0024-4082.
↑ Korshunova, Tatiana; Martynov, Alexander; Picton, Bernard (2017-09-26). "Ontogeny as an important part of integrative taxonomy in tergipedid aeolidaceans (Gastropoda: Nudibranchia) with a description of a new genus and species from the Barents Sea". Zootaxa. 4324 (1). doi:10.11646/zootaxa.4324.1.1. ISSN 1175-5334.
↑ Bouchet, Philippe; Rocroi, Jean-Pierre; Hausdorf, Bernhard; Kaim, Andrzej; Kano, Yasunori; Nützel, Alexander; Parkhaev, Pavel; Schrödl, Michael; Strong, Ellen E. (December 2017). "Revised Classification, Nomenclator and Typification of Gastropod and Monoplacophoran Families". Malacologia. 61 (1–2): 1–526. doi:10.4002/040.061.0201. ISSN 0076-2997.

[Gray1857-1] Gray, J.E. (1857). Guide to the systematic distribution of Mollusca in the British Museum. Part I. [Gastropoda]. London: British Miseum. p. 227. Retrieved 8 August 2026.

[Korshunova_et_al2025-2] 1 2 3 Korshunova, Tatiana; Fletcher, Karin; Martynov, Alexander (2025-08-01). "The endless forms are the most differentiated—how taxonomic pseudo-optimization masked natural diversity and evolution: the nudibranch case". Zoological Journal of the Linnean Society. 204 (4). doi:10.1093/zoolinnean/zlaf057. ISSN 0024-4082.

[Korshunova_et_al2017-3] Korshunova, Tatiana; Martynov, Alexander; Picton, Bernard (2017-09-26). "Ontogeny as an important part of integrative taxonomy in tergipedid aeolidaceans (Gastropoda: Nudibranchia) with a description of a new genus and species from the Barents Sea". Zootaxa. 4324 (1). doi:10.11646/zootaxa.4324.1.1. ISSN 1175-5334.

[Bouchet_et_al2017-4] Bouchet, Philippe; Rocroi, Jean-Pierre; Hausdorf, Bernhard; Kaim, Andrzej; Kano, Yasunori; Nützel, Alexander; Parkhaev, Pavel; Schrödl, Michael; Strong, Ellen E. (December 2017). "Revised Classification, Nomenclator and Typification of Gastropod and Monoplacophoran Families". Malacologia. 61 (1–2): 1–526. doi:10.4002/040.061.0201. ISSN 0076-2997.