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Very similar is Okenia nakamotoensis. They can be distinguished by the number of dorsal appendages: Okenia kondoi has 4 pairs, Okenia nakamotoensis has 5 pairs.
This species was described by Hamatani as Sakishimaia kondoi, Gosliner (2004) proposed synonymising the genera Hopkinsia, Sakishimaia, and Hopkinsiella with Okenia.
Gosliner, T. M. (2004) Phylogenetic Systematics of Okenia, Sakishimaia, Hopkinsiella and Hopkinsia (Nudibranchia: Goniodorididae) with descriptions of new species from the tropical Indo-Pacific.
Proceedings of the California Academy of Sciences, 55: 125-161
More information on Okenia kondoi are on Bill Rudman's Sea-Slug Forum!
How to cite:
Köhler, E. (2017), published 12 February 2017, Okenia kondoi (Hamatani, 2001)
available from https//www.Philippine-Sea-Slugs.com/Nudibranchia/Euctenidiacea/Okenia_kondoi.htm