Halgerda okinawa is a species of sea slug, a dorid nudibranch, shell-less marine gastropod mollusks in the family Discodorididae.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. . ISSN 0076-2997. 397 pp. http://www.vliz.be/Vmdcdata/imis2/ref.php?refid=78278WoRMS (2010). Halgerda okinawa Carlson & Hoff, 2000. 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=457016 on 2011-08-24

Distribution This species was described from Seragaki, Okinawa.Halgerda okinawa on the Okinawa Slug Site, R.F. Bolland It is also reported from Sulawesi and Alor Island, Indonesia, East Timor and the Philippines.Rudman, W.B., 2000 (May 26) Halgerda okinawa Carlson & Hoff, 2000. [In] Sea Slug Forum. Australian Museum, Sydney.

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