Higher Classification: > Kingdom Animalia > Subkingdom Eumetazoa > Phylum Mollusca > Class Gastropoda > Subclass Orthogastropoda > Subclass Heterobranchia > Infraclass Euthyneura > Subterclass Ringipleura > Superorder Nudipleura > Order Nudibranchia > Suborder Cladobranchia > Superfamily Fionoidea > Family Fionidae > Genus Fiona

Fiona pinnata (Eschscholtz, 1831)

Rank: Species
Taxon Status: accepted

Original genus

Eolidia [sic]

Relationships towards this taxon

Genus group names

*Fiona*	Alder & Hancock, 1853	accepted genus name
*Oithona*	Alder & Hancock, 1851	junior homonym
*Hymenaeolis*	A. Costa, 1866	synonym

Species group names

*Doris fasciculata*	Gmelin, 1791	synonym
*Eolidia longicauda*	Quoy & Gaimard, 1832	synonym
*Fiona atlantica*	Bergh, 1857	synonym
*Fiona marina*	Eliot, 1910	synonym
*Hymenaeolis elegantissima*	A. Costa, 1867	synonym
*Limax marinus*	Forsskål, 1775	synonym
*Oithona nobilis*	Alder & Hancock, 1851	synonym

Vernaculars (+) (-)

English: Half-banded Roundhead sources: Gosliner, T. et al. (2023). Southern African Sea Slugs. Southern Underwater Research Group Press, 7 Blackwood Drive, Hout Bay 7806, Cape Town, South Africa.

Japanese: ヒダミノウミウシ

Literature

basis of record	Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca. in: Costello, M.J. et al. (eds), European Register of Marine Species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Patrimoines Naturels. 50: 180-213.
additional source	Rosenberg, G.; Moretzsohn, F.; García, E. F. (2009). Gastropoda (Mollusca) of the Gulf of Mexico, Pp. 579–699 in: Felder, D.L. and D.K. Camp (eds.), Gulf of Mexico–Origins, Waters, and Biota. Texas A&M Press, College Station, Texas.
additional source	Liu, J.Y. [Ruiyu] (ed.). (2008). Checklist of marine biota of China seas. China Science Press. 1267 pp.
additional source	Gosliner, T. (1987). Nudibranchs of Southern Africa: A Guide to Opisthobranch Molluscs of Southern Africa. Sea Challengers, Monterey, California.
additional source	Gosliner, T. et al. (2023). Southern African Sea Slugs. Southern Underwater Research Group Press, 7 Blackwood Drive, Hout Bay 7806, Cape Town, South Africa.
additional source	Schrödl, M. (2003). Sea slugs of Southern South America. Hackenheim: ConchBooks. 165 pp.
additional source	Spencer, H.G., Marshall, B.A. & Willan, R.C. (2009). Checklist of New Zealand living Mollusca. Pp 196-219. in: Gordon, D.P. (ed.) New Zealand inventory of biodiversity. Volume one. Kingdom Animalia: Radiata, Lophotrochozoa, Deuterostomia. Canterbury University Press, Christchurch.

Genbank

Citation

MolluscaBase eds. (2025). MolluscaBase. Fiona pinnata (Eschscholtz, 1831). Via: Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvantidis, C.; Appeltans, W. (2011) European Register of Marine Species, Accessed through PESI at http://www.eu-nomen.eu/portal/taxon.php?GUID=urn:lsid:marinespecies.org:taxname:139942