Okenia hiroi (Baba, 1938) [Hopkinsiella]
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Taxonomy:
Class: Gastropoda  Cuvier, 1797
Subclass: Heterobranchia  J.E. Gray, 1840
Clade: Euthyneura  Spengel, 1881
Clade: Nudipleura  Wägele & Willan, 2000
Order: Nudibranchia  Cuvier, 1817
Suborder: Euctenidiacea  Tardy, 1970
Infraorder: Doridacea  Thiele, 1931
Superfamily: Onchidoridoidea  J.E. Gray, 1827
Family: Goniodorididae  H. Adams & A. Adams, 1854
Genus: Okenia  Menke, 1830
Species: Okenia hiroi (Baba, 1938) [Hopkinsiella]

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.
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formerly placed in the Order: NUDIBRANCHIA, in the Subclass: OPISTHOBRANCHIA
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Okenia hiroi

Northwestern
Pacific Ocean
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