Halgerda onna

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Halgerda onna
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Heterobranchia

clade Euthyneura
clade Nudipleura
clade Nudibranchia
clade Euctenidiacea
clade Doridacea

Superfamily: Doridoidea
Family: Discodorididae
Genus: Halgerda
Species: H. onna
Binomial name
Halgerda onna
Fahey & Gosliner, 2001[1]

Halgerda onna is a species of sea slug, a dorid nudibranch, shell-less marine gastropod mollusks in the family Discodorididae.[2][3][4]


This species was described from Onna Village, Okinawa.[5] It is also reported from Guam.[6]


  1. ^ Fahey, S.J. & Gosliner, T.M. (2001) The phylogeny of Halgerda (Opisthobranchia, Nudibranchia) with the description of a new species from Okinawa. Zoologica Scripta, 30(3): 199-213.
  2. ^ Bouchet P. & Rocroi J.-P. (Ed.); Frýda J., Hausdorf B., Ponder W., Valdes A. & Warén A. 2005. Classification and nomenclator of gastropod families. Malacologia: International Journal of Malacology, 47(1-2). ConchBooks: Hackenheim, Germany. ISBN 3-925919-72-4. ISSN 0076-2997. 397 pp. http://www.vliz.be/Vmdcdata/imis2/ref.php?refid=78278
  3. ^ WoRMS (2010). Halgerda onna Fahey & Gosliner, 2001. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=457328 on 2011-08-24
  4. ^ Dayrat B. 2010. A monographic revision of discodorid sea slugs (Gastropoda, Opisthobranchia, Nudibranchia, Doridina). Proceedings of the California Academy of Sciences, Series 4, vol. 61, suppl. I, 1-403, 382 figs.
  5. ^ Halgerda onna on the Okinawa Slug Site, R.F. Bolland
  6. ^ Rudman, W.B., 2001 (October 10) Halgerda onna Fahey & Gosliner, 2001. [In] Sea Slug Forum. Australian Museum, Sydney.